/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 17:42:53,073 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 17:42:53,114 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 17:42:53,126 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 17:42:53,126 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 17:42:53,143 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 17:42:53,144 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 17:42:53,144 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 17:42:53,144 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 17:42:53,145 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 17:42:53,145 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 17:42:53,145 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 17:42:53,145 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 17:42:53,146 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 17:42:53,146 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 17:42:53,146 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 17:42:53,146 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 17:42:53,146 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 17:42:53,147 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 17:42:53,147 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 17:42:53,147 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 17:42:53,150 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 17:42:53,150 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 17:42:53,151 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 17:42:53,153 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 17:42:53,153 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 17:42:53,153 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 17:42:53,153 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 17:42:53,154 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 17:42:53,154 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 17:42:53,154 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 17:42:53,154 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 17:42:53,154 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 17:42:53,155 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 17:42:53,155 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 17:42:53,155 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 17:42:53,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 17:42:53,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 17:42:53,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 17:42:53,405 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 17:42:53,407 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 17:42:53,408 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2023-08-26 17:42:54,378 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 17:42:54,579 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 17:42:54,579 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2023-08-26 17:42:54,594 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13777c8a1/eca3caa037e34d569cf4a695421b495c/FLAG640ab1a80 [2023-08-26 17:42:54,605 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13777c8a1/eca3caa037e34d569cf4a695421b495c [2023-08-26 17:42:54,608 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 17:42:54,609 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 17:42:54,612 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 17:42:54,612 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 17:42:54,615 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 17:42:54,615 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:42:54" (1/1) ... [2023-08-26 17:42:54,616 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c83788a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:54, skipping insertion in model container [2023-08-26 17:42:54,616 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:42:54" (1/1) ... [2023-08-26 17:42:54,651 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 17:42:54,888 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 17:42:54,896 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 17:42:54,921 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-26 17:42:54,922 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-26 17:42:54,944 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 17:42:54,971 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 17:42:54,971 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 17:42:54,976 INFO L206 MainTranslator]: Completed translation [2023-08-26 17:42:54,977 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:54 WrapperNode [2023-08-26 17:42:54,978 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 17:42:54,978 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 17:42:54,978 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 17:42:54,979 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 17:42:54,983 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:54" (1/1) ... [2023-08-26 17:42:54,997 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:54" (1/1) ... [2023-08-26 17:42:55,013 INFO L138 Inliner]: procedures = 169, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2023-08-26 17:42:55,013 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 17:42:55,014 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 17:42:55,015 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 17:42:55,015 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 17:42:55,020 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:54" (1/1) ... [2023-08-26 17:42:55,020 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:54" (1/1) ... [2023-08-26 17:42:55,032 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:54" (1/1) ... [2023-08-26 17:42:55,032 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:54" (1/1) ... [2023-08-26 17:42:55,035 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:54" (1/1) ... [2023-08-26 17:42:55,041 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:54" (1/1) ... [2023-08-26 17:42:55,042 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:54" (1/1) ... [2023-08-26 17:42:55,043 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:54" (1/1) ... [2023-08-26 17:42:55,044 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 17:42:55,045 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 17:42:55,045 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 17:42:55,045 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 17:42:55,046 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:54" (1/1) ... [2023-08-26 17:42:55,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 17:42:55,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:42:55,070 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 17:42:55,076 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 17:42:55,097 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-26 17:42:55,097 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-26 17:42:55,097 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-26 17:42:55,097 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-26 17:42:55,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 17:42:55,097 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 17:42:55,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 17:42:55,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 17:42:55,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 17:42:55,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 17:42:55,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 17:42:55,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 17:42:55,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 17:42:55,099 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 17:42:55,192 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 17:42:55,194 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 17:42:55,340 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 17:42:55,344 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 17:42:55,344 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 17:42:55,346 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:42:55 BoogieIcfgContainer [2023-08-26 17:42:55,346 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 17:42:55,347 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 17:42:55,347 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 17:42:55,349 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 17:42:55,349 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 05:42:54" (1/3) ... [2023-08-26 17:42:55,349 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fe1da54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:42:55, skipping insertion in model container [2023-08-26 17:42:55,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:54" (2/3) ... [2023-08-26 17:42:55,350 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fe1da54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:42:55, skipping insertion in model container [2023-08-26 17:42:55,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:42:55" (3/3) ... [2023-08-26 17:42:55,351 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2023-08-26 17:42:55,363 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 17:42:55,363 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-08-26 17:42:55,364 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 17:42:55,424 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 17:42:55,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 162 flow [2023-08-26 17:42:55,485 INFO L124 PetriNetUnfolderBase]: 6/74 cut-off events. [2023-08-26 17:42:55,487 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:42:55,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 74 events. 6/74 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 99 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2023-08-26 17:42:55,490 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 76 transitions, 162 flow [2023-08-26 17:42:55,492 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 74 transitions, 154 flow [2023-08-26 17:42:55,495 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 17:42:55,504 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 74 transitions, 154 flow [2023-08-26 17:42:55,506 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 74 transitions, 154 flow [2023-08-26 17:42:55,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 74 transitions, 154 flow [2023-08-26 17:42:55,532 INFO L124 PetriNetUnfolderBase]: 6/74 cut-off events. [2023-08-26 17:42:55,532 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:42:55,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 74 events. 6/74 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 99 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2023-08-26 17:42:55,534 INFO L119 LiptonReduction]: Number of co-enabled transitions 1440 [2023-08-26 17:42:57,255 INFO L134 LiptonReduction]: Checked pairs total: 1354 [2023-08-26 17:42:57,256 INFO L136 LiptonReduction]: Total number of compositions: 81 [2023-08-26 17:42:57,264 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 17:42:57,268 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;@40b27fda, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 17:42:57,268 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-26 17:42:57,268 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 17:42:57,269 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 17:42:57,269 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:42:57,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:57,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 17:42:57,269 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:42:57,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:57,272 INFO L85 PathProgramCache]: Analyzing trace with hash 313, now seen corresponding path program 1 times [2023-08-26 17:42:57,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:57,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037652817] [2023-08-26 17:42:57,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:57,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:57,340 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 17:42:57,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:57,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037652817] [2023-08-26 17:42:57,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037652817] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:57,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:57,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 17:42:57,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118286033] [2023-08-26 17:42:57,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:57,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 17:42:57,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:57,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 17:42:57,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 17:42:57,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 157 [2023-08-26 17:42:57,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 42 flow. Second operand has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:57,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:57,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 157 [2023-08-26 17:42:57,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:57,403 INFO L124 PetriNetUnfolderBase]: 76/125 cut-off events. [2023-08-26 17:42:57,404 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 17:42:57,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 125 events. 76/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 298 event pairs, 48 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 252. Up to 126 conditions per place. [2023-08-26 17:42:57,405 INFO L140 encePairwiseOnDemand]: 154/157 looper letters, 14 selfloop transitions, 0 changer transitions 1/15 dead transitions. [2023-08-26 17:42:57,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 15 transitions, 66 flow [2023-08-26 17:42:57,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 17:42:57,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 17:42:57,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 156 transitions. [2023-08-26 17:42:57,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968152866242038 [2023-08-26 17:42:57,414 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 156 transitions. [2023-08-26 17:42:57,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 156 transitions. [2023-08-26 17:42:57,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:57,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 156 transitions. [2023-08-26 17:42:57,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:57,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:57,420 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:57,421 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 42 flow. Second operand 2 states and 156 transitions. [2023-08-26 17:42:57,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 15 transitions, 66 flow [2023-08-26 17:42:57,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 15 transitions, 64 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 17:42:57,424 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 32 flow [2023-08-26 17:42:57,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=32, PETRI_PLACES=19, PETRI_TRANSITIONS=14} [2023-08-26 17:42:57,427 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -3 predicate places. [2023-08-26 17:42:57,427 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 32 flow [2023-08-26 17:42:57,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:57,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:57,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 17:42:57,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 17:42:57,442 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:42:57,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:57,443 INFO L85 PathProgramCache]: Analyzing trace with hash 306362, now seen corresponding path program 1 times [2023-08-26 17:42:57,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:57,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076322575] [2023-08-26 17:42:57,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:57,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:57,595 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 17:42:57,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:57,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076322575] [2023-08-26 17:42:57,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076322575] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:57,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:57,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 17:42:57,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143401949] [2023-08-26 17:42:57,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:57,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:42:57,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:57,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:42:57,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:42:57,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 157 [2023-08-26 17:42:57,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 32 flow. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:57,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:57,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 157 [2023-08-26 17:42:57,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:57,620 INFO L124 PetriNetUnfolderBase]: 55/92 cut-off events. [2023-08-26 17:42:57,620 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:42:57,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 92 events. 55/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 194 event pairs, 34 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 192. Up to 92 conditions per place. [2023-08-26 17:42:57,621 INFO L140 encePairwiseOnDemand]: 155/157 looper letters, 12 selfloop transitions, 1 changer transitions 0/13 dead transitions. [2023-08-26 17:42:57,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 13 transitions, 56 flow [2023-08-26 17:42:57,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:42:57,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:42:57,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2023-08-26 17:42:57,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39278131634819535 [2023-08-26 17:42:57,623 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2023-08-26 17:42:57,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2023-08-26 17:42:57,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:57,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2023-08-26 17:42:57,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:57,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:57,625 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:57,625 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 32 flow. Second operand 3 states and 185 transitions. [2023-08-26 17:42:57,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 13 transitions, 56 flow [2023-08-26 17:42:57,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 13 transitions, 56 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 17:42:57,626 INFO L231 Difference]: Finished difference. Result has 19 places, 13 transitions, 32 flow [2023-08-26 17:42:57,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=32, PETRI_PLACES=19, PETRI_TRANSITIONS=13} [2023-08-26 17:42:57,626 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -3 predicate places. [2023-08-26 17:42:57,627 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 13 transitions, 32 flow [2023-08-26 17:42:57,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:57,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:57,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 17:42:57,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 17:42:57,627 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:42:57,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:57,627 INFO L85 PathProgramCache]: Analyzing trace with hash 306361, now seen corresponding path program 1 times [2023-08-26 17:42:57,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:57,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835364785] [2023-08-26 17:42:57,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:57,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:57,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:57,669 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 17:42:57,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:57,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835364785] [2023-08-26 17:42:57,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835364785] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:57,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:57,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 17:42:57,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701677997] [2023-08-26 17:42:57,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:57,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:42:57,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:57,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:42:57,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:42:57,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 157 [2023-08-26 17:42:57,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 13 transitions, 32 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:57,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:57,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 157 [2023-08-26 17:42:57,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:57,690 INFO L124 PetriNetUnfolderBase]: 52/86 cut-off events. [2023-08-26 17:42:57,690 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:42:57,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 86 events. 52/86 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 170 event pairs, 32 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 181. Up to 86 conditions per place. [2023-08-26 17:42:57,691 INFO L140 encePairwiseOnDemand]: 155/157 looper letters, 11 selfloop transitions, 1 changer transitions 0/12 dead transitions. [2023-08-26 17:42:57,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 12 transitions, 54 flow [2023-08-26 17:42:57,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:42:57,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:42:57,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 178 transitions. [2023-08-26 17:42:57,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37791932059447986 [2023-08-26 17:42:57,694 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 178 transitions. [2023-08-26 17:42:57,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 178 transitions. [2023-08-26 17:42:57,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:57,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 178 transitions. [2023-08-26 17:42:57,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:57,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:57,696 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:57,696 INFO L175 Difference]: Start difference. First operand has 19 places, 13 transitions, 32 flow. Second operand 3 states and 178 transitions. [2023-08-26 17:42:57,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 12 transitions, 54 flow [2023-08-26 17:42:57,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 12 transitions, 53 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:42:57,696 INFO L231 Difference]: Finished difference. Result has 19 places, 12 transitions, 31 flow [2023-08-26 17:42:57,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=31, PETRI_PLACES=19, PETRI_TRANSITIONS=12} [2023-08-26 17:42:57,697 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -3 predicate places. [2023-08-26 17:42:57,697 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 12 transitions, 31 flow [2023-08-26 17:42:57,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:57,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:57,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 17:42:57,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 17:42:57,698 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:42:57,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:57,698 INFO L85 PathProgramCache]: Analyzing trace with hash 537039974, now seen corresponding path program 1 times [2023-08-26 17:42:57,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:57,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412309332] [2023-08-26 17:42:57,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:57,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:57,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:57,788 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 17:42:57,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:57,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412309332] [2023-08-26 17:42:57,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412309332] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:57,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:57,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:42:57,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124093203] [2023-08-26 17:42:57,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:57,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 17:42:57,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:57,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 17:42:57,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 17:42:57,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:42:57,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 12 transitions, 31 flow. Second operand has 4 states, 4 states have (on average 61.5) internal successors, (246), 4 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:57,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:57,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:42:57,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:57,839 INFO L124 PetriNetUnfolderBase]: 64/107 cut-off events. [2023-08-26 17:42:57,839 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:42:57,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 107 events. 64/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 232 event pairs, 11 based on Foata normal form. 9/87 useless extension candidates. Maximal degree in co-relation 224. Up to 55 conditions per place. [2023-08-26 17:42:57,840 INFO L140 encePairwiseOnDemand]: 153/157 looper letters, 18 selfloop transitions, 4 changer transitions 2/24 dead transitions. [2023-08-26 17:42:57,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 103 flow [2023-08-26 17:42:57,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 17:42:57,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 17:42:57,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 265 transitions. [2023-08-26 17:42:57,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42197452229299365 [2023-08-26 17:42:57,845 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 265 transitions. [2023-08-26 17:42:57,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 265 transitions. [2023-08-26 17:42:57,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:57,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 265 transitions. [2023-08-26 17:42:57,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:57,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:57,848 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:57,848 INFO L175 Difference]: Start difference. First operand has 19 places, 12 transitions, 31 flow. Second operand 4 states and 265 transitions. [2023-08-26 17:42:57,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 103 flow [2023-08-26 17:42:57,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 24 transitions, 102 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:42:57,849 INFO L231 Difference]: Finished difference. Result has 23 places, 15 transitions, 55 flow [2023-08-26 17:42:57,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=55, PETRI_PLACES=23, PETRI_TRANSITIONS=15} [2023-08-26 17:42:57,850 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2023-08-26 17:42:57,850 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 15 transitions, 55 flow [2023-08-26 17:42:57,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.5) internal successors, (246), 4 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:57,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:57,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:42:57,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 17:42:57,850 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:42:57,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:57,851 INFO L85 PathProgramCache]: Analyzing trace with hash 698883682, now seen corresponding path program 1 times [2023-08-26 17:42:57,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:57,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85418329] [2023-08-26 17:42:57,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:57,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:57,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:57,939 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 17:42:57,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:57,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85418329] [2023-08-26 17:42:57,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85418329] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:57,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:57,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 17:42:57,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450184647] [2023-08-26 17:42:57,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:57,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:42:57,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:57,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:42:57,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:42:57,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:42:57,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 15 transitions, 55 flow. Second operand has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:57,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:57,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:42:57,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:58,023 INFO L124 PetriNetUnfolderBase]: 126/217 cut-off events. [2023-08-26 17:42:58,027 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2023-08-26 17:42:58,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 217 events. 126/217 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 667 event pairs, 19 based on Foata normal form. 10/191 useless extension candidates. Maximal degree in co-relation 544. Up to 89 conditions per place. [2023-08-26 17:42:58,031 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 33 selfloop transitions, 9 changer transitions 0/42 dead transitions. [2023-08-26 17:42:58,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 42 transitions, 217 flow [2023-08-26 17:42:58,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 17:42:58,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 17:42:58,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 398 transitions. [2023-08-26 17:42:58,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42250530785562634 [2023-08-26 17:42:58,032 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 398 transitions. [2023-08-26 17:42:58,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 398 transitions. [2023-08-26 17:42:58,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:58,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 398 transitions. [2023-08-26 17:42:58,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.33333333333333) internal successors, (398), 6 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 17:42:58,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 157.0) internal successors, (1099), 7 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:58,036 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 157.0) internal successors, (1099), 7 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:58,036 INFO L175 Difference]: Start difference. First operand has 23 places, 15 transitions, 55 flow. Second operand 6 states and 398 transitions. [2023-08-26 17:42:58,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 42 transitions, 217 flow [2023-08-26 17:42:58,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 42 transitions, 217 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 17:42:58,037 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 136 flow [2023-08-26 17:42:58,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=136, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-08-26 17:42:58,039 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 10 predicate places. [2023-08-26 17:42:58,040 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 136 flow [2023-08-26 17:42:58,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:58,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:58,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:42:58,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 17:42:58,040 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:42:58,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:58,041 INFO L85 PathProgramCache]: Analyzing trace with hash 698901352, now seen corresponding path program 2 times [2023-08-26 17:42:58,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:58,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78844186] [2023-08-26 17:42:58,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:58,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:58,147 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 17:42:58,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:58,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78844186] [2023-08-26 17:42:58,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78844186] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:58,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:58,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 17:42:58,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720527751] [2023-08-26 17:42:58,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:58,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:42:58,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:58,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:42:58,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:42:58,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:42:58,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:58,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:58,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:42:58,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:58,209 INFO L124 PetriNetUnfolderBase]: 114/199 cut-off events. [2023-08-26 17:42:58,209 INFO L125 PetriNetUnfolderBase]: For 280/280 co-relation queries the response was YES. [2023-08-26 17:42:58,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 657 conditions, 199 events. 114/199 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 625 event pairs, 19 based on Foata normal form. 10/209 useless extension candidates. Maximal degree in co-relation 646. Up to 84 conditions per place. [2023-08-26 17:42:58,212 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 29 selfloop transitions, 9 changer transitions 4/42 dead transitions. [2023-08-26 17:42:58,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 42 transitions, 286 flow [2023-08-26 17:42:58,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 17:42:58,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 17:42:58,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 333 transitions. [2023-08-26 17:42:58,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42420382165605097 [2023-08-26 17:42:58,213 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 333 transitions. [2023-08-26 17:42:58,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 333 transitions. [2023-08-26 17:42:58,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:58,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 333 transitions. [2023-08-26 17:42:58,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 66.6) internal successors, (333), 5 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:58,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:58,216 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:58,216 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 136 flow. Second operand 5 states and 333 transitions. [2023-08-26 17:42:58,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 42 transitions, 286 flow [2023-08-26 17:42:58,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 284 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-26 17:42:58,219 INFO L231 Difference]: Finished difference. Result has 38 places, 26 transitions, 184 flow [2023-08-26 17:42:58,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=184, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2023-08-26 17:42:58,220 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 16 predicate places. [2023-08-26 17:42:58,220 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 184 flow [2023-08-26 17:42:58,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:58,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:58,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:42:58,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 17:42:58,220 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:42:58,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:58,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1937873995, now seen corresponding path program 1 times [2023-08-26 17:42:58,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:58,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707233072] [2023-08-26 17:42:58,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:58,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:58,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:58,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707233072] [2023-08-26 17:42:58,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707233072] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:58,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:58,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 17:42:58,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169870023] [2023-08-26 17:42:58,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:58,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 17:42:58,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:58,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 17:42:58,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-26 17:42:58,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:42:58,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 184 flow. Second operand has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:58,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:58,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:42:58,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:58,423 INFO L124 PetriNetUnfolderBase]: 126/219 cut-off events. [2023-08-26 17:42:58,423 INFO L125 PetriNetUnfolderBase]: For 533/533 co-relation queries the response was YES. [2023-08-26 17:42:58,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 797 conditions, 219 events. 126/219 cut-off events. For 533/533 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 705 event pairs, 19 based on Foata normal form. 4/223 useless extension candidates. Maximal degree in co-relation 783. Up to 86 conditions per place. [2023-08-26 17:42:58,424 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 32 selfloop transitions, 16 changer transitions 11/59 dead transitions. [2023-08-26 17:42:58,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 427 flow [2023-08-26 17:42:58,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 17:42:58,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 17:42:58,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 592 transitions. [2023-08-26 17:42:58,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.418966737438075 [2023-08-26 17:42:58,426 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 592 transitions. [2023-08-26 17:42:58,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 592 transitions. [2023-08-26 17:42:58,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:58,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 592 transitions. [2023-08-26 17:42:58,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 65.77777777777777) internal successors, (592), 9 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:58,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 157.0) internal successors, (1570), 10 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:58,429 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 157.0) internal successors, (1570), 10 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:58,431 INFO L175 Difference]: Start difference. First operand has 38 places, 26 transitions, 184 flow. Second operand 9 states and 592 transitions. [2023-08-26 17:42:58,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 427 flow [2023-08-26 17:42:58,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 59 transitions, 390 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-26 17:42:58,436 INFO L231 Difference]: Finished difference. Result has 45 places, 32 transitions, 253 flow [2023-08-26 17:42:58,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=253, PETRI_PLACES=45, PETRI_TRANSITIONS=32} [2023-08-26 17:42:58,437 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 23 predicate places. [2023-08-26 17:42:58,437 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 32 transitions, 253 flow [2023-08-26 17:42:58,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:58,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:58,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:42:58,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 17:42:58,438 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:42:58,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:58,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1938173455, now seen corresponding path program 2 times [2023-08-26 17:42:58,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:58,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113822084] [2023-08-26 17:42:58,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:58,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:58,519 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 17:42:58,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:58,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113822084] [2023-08-26 17:42:58,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113822084] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:58,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:58,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 17:42:58,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130756508] [2023-08-26 17:42:58,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:58,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 17:42:58,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:58,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 17:42:58,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 17:42:58,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:42:58,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 32 transitions, 253 flow. Second operand has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:58,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:58,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:42:58,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:58,595 INFO L124 PetriNetUnfolderBase]: 162/283 cut-off events. [2023-08-26 17:42:58,595 INFO L125 PetriNetUnfolderBase]: For 793/793 co-relation queries the response was YES. [2023-08-26 17:42:58,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 283 events. 162/283 cut-off events. For 793/793 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 948 event pairs, 22 based on Foata normal form. 8/291 useless extension candidates. Maximal degree in co-relation 1077. Up to 77 conditions per place. [2023-08-26 17:42:58,597 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 38 selfloop transitions, 20 changer transitions 3/61 dead transitions. [2023-08-26 17:42:58,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 61 transitions, 499 flow [2023-08-26 17:42:58,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 17:42:58,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 17:42:58,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 526 transitions. [2023-08-26 17:42:58,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41878980891719747 [2023-08-26 17:42:58,598 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 526 transitions. [2023-08-26 17:42:58,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 526 transitions. [2023-08-26 17:42:58,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:58,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 526 transitions. [2023-08-26 17:42:58,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 65.75) internal successors, (526), 8 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:58,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 157.0) internal successors, (1413), 9 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:58,601 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 157.0) internal successors, (1413), 9 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:58,601 INFO L175 Difference]: Start difference. First operand has 45 places, 32 transitions, 253 flow. Second operand 8 states and 526 transitions. [2023-08-26 17:42:58,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 61 transitions, 499 flow [2023-08-26 17:42:58,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 61 transitions, 469 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-26 17:42:58,605 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 346 flow [2023-08-26 17:42:58,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=346, PETRI_PLACES=54, PETRI_TRANSITIONS=38} [2023-08-26 17:42:58,606 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 32 predicate places. [2023-08-26 17:42:58,607 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 346 flow [2023-08-26 17:42:58,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:58,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:58,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:42:58,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 17:42:58,607 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:42:58,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:58,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1978408975, now seen corresponding path program 3 times [2023-08-26 17:42:58,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:58,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195217815] [2023-08-26 17:42:58,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:58,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:58,694 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 17:42:58,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:58,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195217815] [2023-08-26 17:42:58,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195217815] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:58,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:58,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 17:42:58,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202660134] [2023-08-26 17:42:58,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:58,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 17:42:58,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:58,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 17:42:58,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-26 17:42:58,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:42:58,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 38 transitions, 346 flow. Second operand has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:58,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:58,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:42:58,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:58,799 INFO L124 PetriNetUnfolderBase]: 158/275 cut-off events. [2023-08-26 17:42:58,799 INFO L125 PetriNetUnfolderBase]: For 1250/1250 co-relation queries the response was YES. [2023-08-26 17:42:58,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1256 conditions, 275 events. 158/275 cut-off events. For 1250/1250 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 938 event pairs, 18 based on Foata normal form. 8/283 useless extension candidates. Maximal degree in co-relation 1236. Up to 65 conditions per place. [2023-08-26 17:42:58,800 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 28 selfloop transitions, 25 changer transitions 10/63 dead transitions. [2023-08-26 17:42:58,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 63 transitions, 618 flow [2023-08-26 17:42:58,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 17:42:58,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 17:42:58,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 525 transitions. [2023-08-26 17:42:58,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4179936305732484 [2023-08-26 17:42:58,802 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 525 transitions. [2023-08-26 17:42:58,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 525 transitions. [2023-08-26 17:42:58,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:58,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 525 transitions. [2023-08-26 17:42:58,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 65.625) internal successors, (525), 8 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:58,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 157.0) internal successors, (1413), 9 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:58,805 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 157.0) internal successors, (1413), 9 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:58,805 INFO L175 Difference]: Start difference. First operand has 54 places, 38 transitions, 346 flow. Second operand 8 states and 525 transitions. [2023-08-26 17:42:58,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 63 transitions, 618 flow [2023-08-26 17:42:58,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 63 transitions, 583 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-26 17:42:58,810 INFO L231 Difference]: Finished difference. Result has 61 places, 41 transitions, 439 flow [2023-08-26 17:42:58,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=439, PETRI_PLACES=61, PETRI_TRANSITIONS=41} [2023-08-26 17:42:58,811 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 39 predicate places. [2023-08-26 17:42:58,811 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 41 transitions, 439 flow [2023-08-26 17:42:58,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:58,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:58,811 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:42:58,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 17:42:58,812 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:42:58,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:58,812 INFO L85 PathProgramCache]: Analyzing trace with hash -73293778, now seen corresponding path program 4 times [2023-08-26 17:42:58,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:58,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283636478] [2023-08-26 17:42:58,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:58,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:58,880 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 17:42:58,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:58,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283636478] [2023-08-26 17:42:58,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283636478] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:42:58,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976682859] [2023-08-26 17:42:58,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 17:42:58,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:42:58,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:42:58,883 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 17:42:58,912 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 17:42:58,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 17:42:58,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:42:58,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 17:42:58,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:42:59,003 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 17:42:59,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:42:59,087 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 17:42:59,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976682859] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:42:59,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:42:59,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-26 17:42:59,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533184463] [2023-08-26 17:42:59,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:42:59,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 17:42:59,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:59,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 17:42:59,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-26 17:42:59,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:42:59,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 41 transitions, 439 flow. Second operand has 12 states, 12 states have (on average 61.916666666666664) internal successors, (743), 12 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:59,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:59,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:42:59,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:59,231 INFO L124 PetriNetUnfolderBase]: 182/323 cut-off events. [2023-08-26 17:42:59,231 INFO L125 PetriNetUnfolderBase]: For 2479/2479 co-relation queries the response was YES. [2023-08-26 17:42:59,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1608 conditions, 323 events. 182/323 cut-off events. For 2479/2479 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1098 event pairs, 39 based on Foata normal form. 24/347 useless extension candidates. Maximal degree in co-relation 1585. Up to 181 conditions per place. [2023-08-26 17:42:59,233 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 45 selfloop transitions, 17 changer transitions 19/81 dead transitions. [2023-08-26 17:42:59,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 81 transitions, 875 flow [2023-08-26 17:42:59,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 17:42:59,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 17:42:59,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 785 transitions. [2023-08-26 17:42:59,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-08-26 17:42:59,235 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 785 transitions. [2023-08-26 17:42:59,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 785 transitions. [2023-08-26 17:42:59,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:59,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 785 transitions. [2023-08-26 17:42:59,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 65.41666666666667) internal successors, (785), 12 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:59,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 157.0) internal successors, (2041), 13 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:59,239 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 157.0) internal successors, (2041), 13 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:59,239 INFO L175 Difference]: Start difference. First operand has 61 places, 41 transitions, 439 flow. Second operand 12 states and 785 transitions. [2023-08-26 17:42:59,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 81 transitions, 875 flow [2023-08-26 17:42:59,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 81 transitions, 822 flow, removed 10 selfloop flow, removed 5 redundant places. [2023-08-26 17:42:59,244 INFO L231 Difference]: Finished difference. Result has 73 places, 47 transitions, 546 flow [2023-08-26 17:42:59,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=546, PETRI_PLACES=73, PETRI_TRANSITIONS=47} [2023-08-26 17:42:59,244 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 51 predicate places. [2023-08-26 17:42:59,245 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 47 transitions, 546 flow [2023-08-26 17:42:59,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 61.916666666666664) internal successors, (743), 12 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:59,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:59,245 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:42:59,252 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 17:42:59,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-26 17:42:59,450 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:42:59,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:59,450 INFO L85 PathProgramCache]: Analyzing trace with hash -56312908, now seen corresponding path program 5 times [2023-08-26 17:42:59,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:59,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438334132] [2023-08-26 17:42:59,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:59,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:59,548 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 17:42:59,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:59,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438334132] [2023-08-26 17:42:59,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438334132] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:42:59,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279086806] [2023-08-26 17:42:59,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 17:42:59,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:42:59,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:42:59,549 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 17:42:59,551 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 17:42:59,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 17:42:59,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:42:59,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 17:42:59,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:42:59,669 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 17:42:59,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:42:59,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:59,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279086806] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:42:59,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:42:59,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-26 17:42:59,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675830484] [2023-08-26 17:42:59,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:42:59,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 17:42:59,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:59,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 17:42:59,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-08-26 17:42:59,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:42:59,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 47 transitions, 546 flow. Second operand has 13 states, 13 states have (on average 61.92307692307692) internal successors, (805), 13 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:59,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:59,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:42:59,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:00,042 INFO L124 PetriNetUnfolderBase]: 244/439 cut-off events. [2023-08-26 17:43:00,043 INFO L125 PetriNetUnfolderBase]: For 6692/6692 co-relation queries the response was YES. [2023-08-26 17:43:00,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2516 conditions, 439 events. 244/439 cut-off events. For 6692/6692 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1693 event pairs, 30 based on Foata normal form. 28/467 useless extension candidates. Maximal degree in co-relation 2487. Up to 128 conditions per place. [2023-08-26 17:43:00,045 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 46 selfloop transitions, 42 changer transitions 29/117 dead transitions. [2023-08-26 17:43:00,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 117 transitions, 1407 flow [2023-08-26 17:43:00,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-26 17:43:00,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-26 17:43:00,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1177 transitions. [2023-08-26 17:43:00,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4164897381457891 [2023-08-26 17:43:00,048 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1177 transitions. [2023-08-26 17:43:00,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1177 transitions. [2023-08-26 17:43:00,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:00,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1177 transitions. [2023-08-26 17:43:00,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 65.38888888888889) internal successors, (1177), 18 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:00,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 157.0) internal successors, (2983), 19 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:00,053 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 157.0) internal successors, (2983), 19 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:00,053 INFO L175 Difference]: Start difference. First operand has 73 places, 47 transitions, 546 flow. Second operand 18 states and 1177 transitions. [2023-08-26 17:43:00,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 117 transitions, 1407 flow [2023-08-26 17:43:00,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 117 transitions, 1267 flow, removed 59 selfloop flow, removed 5 redundant places. [2023-08-26 17:43:00,061 INFO L231 Difference]: Finished difference. Result has 95 places, 64 transitions, 900 flow [2023-08-26 17:43:00,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=900, PETRI_PLACES=95, PETRI_TRANSITIONS=64} [2023-08-26 17:43:00,061 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 73 predicate places. [2023-08-26 17:43:00,061 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 64 transitions, 900 flow [2023-08-26 17:43:00,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 61.92307692307692) internal successors, (805), 13 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:00,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:00,062 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:43:00,069 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 17:43:00,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-26 17:43:00,267 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:43:00,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:00,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1431096326, now seen corresponding path program 6 times [2023-08-26 17:43:00,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:00,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281586656] [2023-08-26 17:43:00,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:00,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:00,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:00,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:00,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:00,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281586656] [2023-08-26 17:43:00,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281586656] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:43:00,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761198031] [2023-08-26 17:43:00,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 17:43:00,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:00,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:43:00,334 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 17:43:00,336 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 17:43:00,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-26 17:43:00,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:43:00,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 17:43:00,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:43:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:00,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:43:00,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:00,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761198031] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:43:00,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:43:00,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-26 17:43:00,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278370421] [2023-08-26 17:43:00,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:43:00,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 17:43:00,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:00,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 17:43:00,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-08-26 17:43:00,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:43:00,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 64 transitions, 900 flow. Second operand has 14 states, 14 states have (on average 61.785714285714285) internal successors, (865), 14 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:00,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:00,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:43:00,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:00,740 INFO L124 PetriNetUnfolderBase]: 328/599 cut-off events. [2023-08-26 17:43:00,741 INFO L125 PetriNetUnfolderBase]: For 14932/14932 co-relation queries the response was YES. [2023-08-26 17:43:00,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4416 conditions, 599 events. 328/599 cut-off events. For 14932/14932 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2521 event pairs, 23 based on Foata normal form. 24/623 useless extension candidates. Maximal degree in co-relation 4377. Up to 204 conditions per place. [2023-08-26 17:43:00,744 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 56 selfloop transitions, 58 changer transitions 19/133 dead transitions. [2023-08-26 17:43:00,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 133 transitions, 2135 flow [2023-08-26 17:43:00,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-26 17:43:00,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-26 17:43:00,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1172 transitions. [2023-08-26 17:43:00,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472045293701343 [2023-08-26 17:43:00,747 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1172 transitions. [2023-08-26 17:43:00,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1172 transitions. [2023-08-26 17:43:00,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:00,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1172 transitions. [2023-08-26 17:43:00,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 65.11111111111111) internal successors, (1172), 18 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:00,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 157.0) internal successors, (2983), 19 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:00,753 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 157.0) internal successors, (2983), 19 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:00,753 INFO L175 Difference]: Start difference. First operand has 95 places, 64 transitions, 900 flow. Second operand 18 states and 1172 transitions. [2023-08-26 17:43:00,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 133 transitions, 2135 flow [2023-08-26 17:43:00,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 133 transitions, 1849 flow, removed 129 selfloop flow, removed 7 redundant places. [2023-08-26 17:43:00,772 INFO L231 Difference]: Finished difference. Result has 113 places, 80 transitions, 1256 flow [2023-08-26 17:43:00,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=696, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1256, PETRI_PLACES=113, PETRI_TRANSITIONS=80} [2023-08-26 17:43:00,773 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 91 predicate places. [2023-08-26 17:43:00,773 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 80 transitions, 1256 flow [2023-08-26 17:43:00,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 61.785714285714285) internal successors, (865), 14 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:00,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:00,773 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:43:00,784 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 17:43:00,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:00,983 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:43:00,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:00,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1418584700, now seen corresponding path program 7 times [2023-08-26 17:43:00,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:00,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846195359] [2023-08-26 17:43:00,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:00,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:00,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:01,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:01,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846195359] [2023-08-26 17:43:01,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846195359] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:43:01,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964167075] [2023-08-26 17:43:01,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 17:43:01,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:01,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:43:01,043 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 17:43:01,045 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 17:43:01,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:01,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 17:43:01,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:43:01,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:01,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:43:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:01,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964167075] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:43:01,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:43:01,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-26 17:43:01,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146806996] [2023-08-26 17:43:01,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:43:01,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 17:43:01,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:01,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 17:43:01,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-26 17:43:01,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:43:01,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 80 transitions, 1256 flow. Second operand has 14 states, 14 states have (on average 61.785714285714285) internal successors, (865), 14 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:01,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:01,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:43:01,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:01,514 INFO L124 PetriNetUnfolderBase]: 388/707 cut-off events. [2023-08-26 17:43:01,514 INFO L125 PetriNetUnfolderBase]: For 28828/28828 co-relation queries the response was YES. [2023-08-26 17:43:01,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5910 conditions, 707 events. 388/707 cut-off events. For 28828/28828 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3087 event pairs, 12 based on Foata normal form. 28/735 useless extension candidates. Maximal degree in co-relation 5863. Up to 243 conditions per place. [2023-08-26 17:43:01,519 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 46 selfloop transitions, 84 changer transitions 38/168 dead transitions. [2023-08-26 17:43:01,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 168 transitions, 3022 flow [2023-08-26 17:43:01,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 17:43:01,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-26 17:43:01,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1436 transitions. [2023-08-26 17:43:01,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4157498552403011 [2023-08-26 17:43:01,522 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1436 transitions. [2023-08-26 17:43:01,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1436 transitions. [2023-08-26 17:43:01,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:01,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1436 transitions. [2023-08-26 17:43:01,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 65.27272727272727) internal successors, (1436), 22 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:01,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 157.0) internal successors, (3611), 23 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:01,528 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 157.0) internal successors, (3611), 23 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:01,528 INFO L175 Difference]: Start difference. First operand has 113 places, 80 transitions, 1256 flow. Second operand 22 states and 1436 transitions. [2023-08-26 17:43:01,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 168 transitions, 3022 flow [2023-08-26 17:43:01,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 168 transitions, 2450 flow, removed 251 selfloop flow, removed 12 redundant places. [2023-08-26 17:43:01,556 INFO L231 Difference]: Finished difference. Result has 133 places, 101 transitions, 1726 flow [2023-08-26 17:43:01,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1726, PETRI_PLACES=133, PETRI_TRANSITIONS=101} [2023-08-26 17:43:01,557 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 111 predicate places. [2023-08-26 17:43:01,557 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 101 transitions, 1726 flow [2023-08-26 17:43:01,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 61.785714285714285) internal successors, (865), 14 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:01,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:01,558 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:43:01,564 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 17:43:01,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:01,762 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:43:01,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:01,763 INFO L85 PathProgramCache]: Analyzing trace with hash -677009652, now seen corresponding path program 8 times [2023-08-26 17:43:01,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:01,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253927644] [2023-08-26 17:43:01,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:01,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:01,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:01,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:01,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:01,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253927644] [2023-08-26 17:43:01,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253927644] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:43:01,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792753986] [2023-08-26 17:43:01,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 17:43:01,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:01,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:43:01,871 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 17:43:01,872 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 17:43:01,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 17:43:01,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:43:01,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 17:43:01,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:43:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:01,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:43:02,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:02,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792753986] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:43:02,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:43:02,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2023-08-26 17:43:02,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507536636] [2023-08-26 17:43:02,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:43:02,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 17:43:02,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:02,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 17:43:02,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2023-08-26 17:43:02,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:43:02,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 101 transitions, 1726 flow. Second operand has 22 states, 22 states have (on average 61.5) internal successors, (1353), 22 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:02,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:02,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:43:02,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:02,703 INFO L124 PetriNetUnfolderBase]: 536/955 cut-off events. [2023-08-26 17:43:02,703 INFO L125 PetriNetUnfolderBase]: For 45473/45473 co-relation queries the response was YES. [2023-08-26 17:43:02,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8858 conditions, 955 events. 536/955 cut-off events. For 45473/45473 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4119 event pairs, 15 based on Foata normal form. 36/991 useless extension candidates. Maximal degree in co-relation 8803. Up to 335 conditions per place. [2023-08-26 17:43:02,710 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 60 selfloop transitions, 121 changer transitions 66/247 dead transitions. [2023-08-26 17:43:02,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 247 transitions, 4990 flow [2023-08-26 17:43:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-26 17:43:02,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-26 17:43:02,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2342 transitions. [2023-08-26 17:43:02,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4143665958952583 [2023-08-26 17:43:02,715 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2342 transitions. [2023-08-26 17:43:02,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2342 transitions. [2023-08-26 17:43:02,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:02,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2342 transitions. [2023-08-26 17:43:02,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 65.05555555555556) internal successors, (2342), 36 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:02,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 157.0) internal successors, (5809), 37 states have internal predecessors, (5809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:02,728 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 157.0) internal successors, (5809), 37 states have internal predecessors, (5809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:02,728 INFO L175 Difference]: Start difference. First operand has 133 places, 101 transitions, 1726 flow. Second operand 36 states and 2342 transitions. [2023-08-26 17:43:02,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 247 transitions, 4990 flow [2023-08-26 17:43:02,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 247 transitions, 4354 flow, removed 281 selfloop flow, removed 14 redundant places. [2023-08-26 17:43:02,777 INFO L231 Difference]: Finished difference. Result has 172 places, 138 transitions, 2764 flow [2023-08-26 17:43:02,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2764, PETRI_PLACES=172, PETRI_TRANSITIONS=138} [2023-08-26 17:43:02,778 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 150 predicate places. [2023-08-26 17:43:02,778 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 138 transitions, 2764 flow [2023-08-26 17:43:02,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.5) internal successors, (1353), 22 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:02,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:02,778 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:43:02,785 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 17:43:02,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-26 17:43:02,984 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:43:02,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:02,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1707412399, now seen corresponding path program 9 times [2023-08-26 17:43:02,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:02,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43438187] [2023-08-26 17:43:02,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:02,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:03,226 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:03,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:03,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43438187] [2023-08-26 17:43:03,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43438187] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:43:03,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710810934] [2023-08-26 17:43:03,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 17:43:03,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:03,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:43:03,227 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 17:43:03,228 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 17:43:03,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-08-26 17:43:03,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:43:03,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-26 17:43:03,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:43:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:03,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:43:03,586 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:03,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710810934] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:43:03,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:43:03,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 24 [2023-08-26 17:43:03,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496696512] [2023-08-26 17:43:03,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:43:03,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-26 17:43:03,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:03,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-26 17:43:03,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2023-08-26 17:43:03,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:43:03,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 138 transitions, 2764 flow. Second operand has 26 states, 26 states have (on average 61.46153846153846) internal successors, (1598), 26 states have internal predecessors, (1598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:03,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:03,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:43:03,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:04,102 INFO L124 PetriNetUnfolderBase]: 664/1211 cut-off events. [2023-08-26 17:43:04,103 INFO L125 PetriNetUnfolderBase]: For 97076/97076 co-relation queries the response was YES. [2023-08-26 17:43:04,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13943 conditions, 1211 events. 664/1211 cut-off events. For 97076/97076 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 5496 event pairs, 102 based on Foata normal form. 32/1243 useless extension candidates. Maximal degree in co-relation 13874. Up to 463 conditions per place. [2023-08-26 17:43:04,112 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 106 selfloop transitions, 96 changer transitions 53/255 dead transitions. [2023-08-26 17:43:04,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 255 transitions, 6366 flow [2023-08-26 17:43:04,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-26 17:43:04,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-26 17:43:04,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1877 transitions. [2023-08-26 17:43:04,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4122556556116846 [2023-08-26 17:43:04,115 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1877 transitions. [2023-08-26 17:43:04,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1877 transitions. [2023-08-26 17:43:04,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:04,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1877 transitions. [2023-08-26 17:43:04,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 64.72413793103448) internal successors, (1877), 29 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:04,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 157.0) internal successors, (4710), 30 states have internal predecessors, (4710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:04,121 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 157.0) internal successors, (4710), 30 states have internal predecessors, (4710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:04,121 INFO L175 Difference]: Start difference. First operand has 172 places, 138 transitions, 2764 flow. Second operand 29 states and 1877 transitions. [2023-08-26 17:43:04,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 255 transitions, 6366 flow [2023-08-26 17:43:04,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 255 transitions, 4884 flow, removed 710 selfloop flow, removed 13 redundant places. [2023-08-26 17:43:04,278 INFO L231 Difference]: Finished difference. Result has 197 places, 170 transitions, 3115 flow [2023-08-26 17:43:04,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=1990, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3115, PETRI_PLACES=197, PETRI_TRANSITIONS=170} [2023-08-26 17:43:04,279 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 175 predicate places. [2023-08-26 17:43:04,279 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 170 transitions, 3115 flow [2023-08-26 17:43:04,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 61.46153846153846) internal successors, (1598), 26 states have internal predecessors, (1598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:04,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:04,279 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:43:04,286 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 17:43:04,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-26 17:43:04,484 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:43:04,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:04,485 INFO L85 PathProgramCache]: Analyzing trace with hash 595027935, now seen corresponding path program 10 times [2023-08-26 17:43:04,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:04,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106770848] [2023-08-26 17:43:04,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:04,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:04,671 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:04,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:04,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106770848] [2023-08-26 17:43:04,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106770848] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:43:04,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161232665] [2023-08-26 17:43:04,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 17:43:04,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:04,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:43:04,673 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 17:43:04,674 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 17:43:04,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 17:43:04,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:43:04,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-26 17:43:04,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:43:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:04,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:43:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:04,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161232665] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:43:04,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:43:04,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2023-08-26 17:43:04,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84130823] [2023-08-26 17:43:04,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:43:04,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-26 17:43:04,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:04,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-26 17:43:04,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2023-08-26 17:43:04,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:43:04,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 170 transitions, 3115 flow. Second operand has 30 states, 30 states have (on average 61.4) internal successors, (1842), 30 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:04,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:04,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:43:04,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:05,666 INFO L124 PetriNetUnfolderBase]: 808/1483 cut-off events. [2023-08-26 17:43:05,666 INFO L125 PetriNetUnfolderBase]: For 154855/154855 co-relation queries the response was YES. [2023-08-26 17:43:05,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17187 conditions, 1483 events. 808/1483 cut-off events. For 154855/154855 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 6861 event pairs, 38 based on Foata normal form. 32/1515 useless extension candidates. Maximal degree in co-relation 17112. Up to 591 conditions per place. [2023-08-26 17:43:05,679 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 73 selfloop transitions, 173 changer transitions 67/313 dead transitions. [2023-08-26 17:43:05,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 313 transitions, 7239 flow [2023-08-26 17:43:05,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-26 17:43:05,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-26 17:43:05,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2332 transitions. [2023-08-26 17:43:05,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41259731068648264 [2023-08-26 17:43:05,682 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2332 transitions. [2023-08-26 17:43:05,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2332 transitions. [2023-08-26 17:43:05,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:05,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2332 transitions. [2023-08-26 17:43:05,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 64.77777777777777) internal successors, (2332), 36 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:05,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 157.0) internal successors, (5809), 37 states have internal predecessors, (5809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:05,690 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 157.0) internal successors, (5809), 37 states have internal predecessors, (5809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:05,690 INFO L175 Difference]: Start difference. First operand has 197 places, 170 transitions, 3115 flow. Second operand 36 states and 2332 transitions. [2023-08-26 17:43:05,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 313 transitions, 7239 flow [2023-08-26 17:43:05,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 313 transitions, 6567 flow, removed 304 selfloop flow, removed 11 redundant places. [2023-08-26 17:43:05,897 INFO L231 Difference]: Finished difference. Result has 234 places, 207 transitions, 4120 flow [2023-08-26 17:43:05,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=2635, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=4120, PETRI_PLACES=234, PETRI_TRANSITIONS=207} [2023-08-26 17:43:05,897 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 212 predicate places. [2023-08-26 17:43:05,897 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 207 transitions, 4120 flow [2023-08-26 17:43:05,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 61.4) internal successors, (1842), 30 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:05,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:05,898 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:43:05,907 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 17:43:06,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:06,107 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:43:06,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:06,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1818296057, now seen corresponding path program 11 times [2023-08-26 17:43:06,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:06,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934932265] [2023-08-26 17:43:06,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:06,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:06,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:06,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934932265] [2023-08-26 17:43:06,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934932265] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:43:06,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887037880] [2023-08-26 17:43:06,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 17:43:06,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:06,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:43:06,260 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 17:43:06,267 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 17:43:06,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-08-26 17:43:06,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:43:06,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-26 17:43:06,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:43:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:06,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:43:06,529 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:06,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887037880] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:43:06,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:43:06,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 24 [2023-08-26 17:43:06,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446868731] [2023-08-26 17:43:06,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:43:06,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-26 17:43:06,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:06,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-26 17:43:06,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2023-08-26 17:43:06,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:43:06,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 207 transitions, 4120 flow. Second operand has 26 states, 26 states have (on average 61.42307692307692) internal successors, (1597), 26 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:06,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:06,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:43:06,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:07,438 INFO L124 PetriNetUnfolderBase]: 928/1687 cut-off events. [2023-08-26 17:43:07,438 INFO L125 PetriNetUnfolderBase]: For 236172/236172 co-relation queries the response was YES. [2023-08-26 17:43:07,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22180 conditions, 1687 events. 928/1687 cut-off events. For 236172/236172 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 7776 event pairs, 16 based on Foata normal form. 32/1719 useless extension candidates. Maximal degree in co-relation 22091. Up to 675 conditions per place. [2023-08-26 17:43:07,454 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 76 selfloop transitions, 214 changer transitions 75/365 dead transitions. [2023-08-26 17:43:07,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 365 transitions, 9592 flow [2023-08-26 17:43:07,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-26 17:43:07,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-26 17:43:07,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2853 transitions. [2023-08-26 17:43:07,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4129994209612044 [2023-08-26 17:43:07,469 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2853 transitions. [2023-08-26 17:43:07,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2853 transitions. [2023-08-26 17:43:07,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:07,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2853 transitions. [2023-08-26 17:43:07,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 64.8409090909091) internal successors, (2853), 44 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:07,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 157.0) internal successors, (7065), 45 states have internal predecessors, (7065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:07,478 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 157.0) internal successors, (7065), 45 states have internal predecessors, (7065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:07,478 INFO L175 Difference]: Start difference. First operand has 234 places, 207 transitions, 4120 flow. Second operand 44 states and 2853 transitions. [2023-08-26 17:43:07,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 365 transitions, 9592 flow [2023-08-26 17:43:07,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 365 transitions, 8812 flow, removed 301 selfloop flow, removed 17 redundant places. [2023-08-26 17:43:07,728 INFO L231 Difference]: Finished difference. Result has 276 places, 234 transitions, 5351 flow [2023-08-26 17:43:07,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=3342, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=5351, PETRI_PLACES=276, PETRI_TRANSITIONS=234} [2023-08-26 17:43:07,728 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 254 predicate places. [2023-08-26 17:43:07,728 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 234 transitions, 5351 flow [2023-08-26 17:43:07,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 61.42307692307692) internal successors, (1597), 26 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:07,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:07,729 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:43:07,733 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 17:43:07,933 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,SelfDestructingSolverStorable16 [2023-08-26 17:43:07,933 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:43:07,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:07,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1618107878, now seen corresponding path program 12 times [2023-08-26 17:43:07,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:07,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492208992] [2023-08-26 17:43:07,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:07,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:08,179 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:08,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:08,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492208992] [2023-08-26 17:43:08,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492208992] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:43:08,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135996648] [2023-08-26 17:43:08,180 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 17:43:08,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:08,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:43:08,181 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 17:43:08,181 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 17:43:08,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-08-26 17:43:08,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:43:08,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-26 17:43:08,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:43:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:08,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:43:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:08,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135996648] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:43:08,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:43:08,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 27 [2023-08-26 17:43:08,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025309069] [2023-08-26 17:43:08,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:43:08,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-26 17:43:08,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:08,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-26 17:43:08,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=627, Unknown=0, NotChecked=0, Total=812 [2023-08-26 17:43:08,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:43:08,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 234 transitions, 5351 flow. Second operand has 29 states, 29 states have (on average 61.41379310344828) internal successors, (1781), 29 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:08,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:08,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:43:08,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:09,798 INFO L124 PetriNetUnfolderBase]: 1040/1887 cut-off events. [2023-08-26 17:43:09,798 INFO L125 PetriNetUnfolderBase]: For 382747/382747 co-relation queries the response was YES. [2023-08-26 17:43:09,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28677 conditions, 1887 events. 1040/1887 cut-off events. For 382747/382747 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 8836 event pairs, 17 based on Foata normal form. 28/1915 useless extension candidates. Maximal degree in co-relation 28572. Up to 755 conditions per place. [2023-08-26 17:43:09,815 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 79 selfloop transitions, 247 changer transitions 96/422 dead transitions. [2023-08-26 17:43:09,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 422 transitions, 12535 flow [2023-08-26 17:43:09,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-26 17:43:09,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-26 17:43:09,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3306 transitions. [2023-08-26 17:43:09,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41288872236792806 [2023-08-26 17:43:09,818 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3306 transitions. [2023-08-26 17:43:09,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3306 transitions. [2023-08-26 17:43:09,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:09,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3306 transitions. [2023-08-26 17:43:09,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 64.82352941176471) internal successors, (3306), 51 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:09,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 157.0) internal successors, (8164), 52 states have internal predecessors, (8164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:09,829 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 157.0) internal successors, (8164), 52 states have internal predecessors, (8164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:09,829 INFO L175 Difference]: Start difference. First operand has 276 places, 234 transitions, 5351 flow. Second operand 51 states and 3306 transitions. [2023-08-26 17:43:09,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 422 transitions, 12535 flow [2023-08-26 17:43:10,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 422 transitions, 10488 flow, removed 883 selfloop flow, removed 28 redundant places. [2023-08-26 17:43:10,389 INFO L231 Difference]: Finished difference. Result has 308 places, 266 transitions, 5713 flow [2023-08-26 17:43:10,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=3924, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=5713, PETRI_PLACES=308, PETRI_TRANSITIONS=266} [2023-08-26 17:43:10,389 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 286 predicate places. [2023-08-26 17:43:10,389 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 266 transitions, 5713 flow [2023-08-26 17:43:10,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 61.41379310344828) internal successors, (1781), 29 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:10,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:10,390 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:43:10,399 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 17:43:10,594 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,SelfDestructingSolverStorable17 [2023-08-26 17:43:10,594 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:43:10,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:10,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1275120642, now seen corresponding path program 13 times [2023-08-26 17:43:10,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:10,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228163155] [2023-08-26 17:43:10,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:10,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:10,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:10,714 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:10,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:10,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228163155] [2023-08-26 17:43:10,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228163155] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:43:10,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934187024] [2023-08-26 17:43:10,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 17:43:10,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:10,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:43:10,715 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 17:43:10,717 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 17:43:10,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:10,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-26 17:43:10,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:43:10,807 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:10,807 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 17:43:10,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934187024] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:43:10,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 17:43:10,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2023-08-26 17:43:10,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937269922] [2023-08-26 17:43:10,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:43:10,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 17:43:10,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:10,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 17:43:10,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2023-08-26 17:43:10,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 157 [2023-08-26 17:43:10,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 266 transitions, 5713 flow. Second operand has 13 states, 13 states have (on average 65.23076923076923) internal successors, (848), 13 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:10,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:10,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 157 [2023-08-26 17:43:10,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:12,296 INFO L124 PetriNetUnfolderBase]: 4503/7073 cut-off events. [2023-08-26 17:43:12,296 INFO L125 PetriNetUnfolderBase]: For 1535018/1535018 co-relation queries the response was YES. [2023-08-26 17:43:12,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100158 conditions, 7073 events. 4503/7073 cut-off events. For 1535018/1535018 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 38582 event pairs, 86 based on Foata normal form. 380/7453 useless extension candidates. Maximal degree in co-relation 100046. Up to 2663 conditions per place. [2023-08-26 17:43:12,345 INFO L140 encePairwiseOnDemand]: 154/157 looper letters, 0 selfloop transitions, 0 changer transitions 1468/1468 dead transitions. [2023-08-26 17:43:12,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 1468 transitions, 30221 flow [2023-08-26 17:43:12,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 17:43:12,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 17:43:12,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 916 transitions. [2023-08-26 17:43:12,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4487996080352768 [2023-08-26 17:43:12,347 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 916 transitions. [2023-08-26 17:43:12,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 916 transitions. [2023-08-26 17:43:12,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:12,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 916 transitions. [2023-08-26 17:43:12,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 70.46153846153847) internal successors, (916), 13 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:12,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 157.0) internal successors, (2198), 14 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:12,349 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 157.0) internal successors, (2198), 14 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:12,350 INFO L175 Difference]: Start difference. First operand has 308 places, 266 transitions, 5713 flow. Second operand 13 states and 916 transitions. [2023-08-26 17:43:12,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 1468 transitions, 30221 flow [2023-08-26 17:43:14,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 1468 transitions, 26756 flow, removed 425 selfloop flow, removed 44 redundant places. [2023-08-26 17:43:14,075 INFO L231 Difference]: Finished difference. Result has 274 places, 0 transitions, 0 flow [2023-08-26 17:43:14,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=4040, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=0, PETRI_PLACES=274, PETRI_TRANSITIONS=0} [2023-08-26 17:43:14,076 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 252 predicate places. [2023-08-26 17:43:14,076 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 0 transitions, 0 flow [2023-08-26 17:43:14,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 65.23076923076923) internal successors, (848), 13 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:14,078 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 7 remaining) [2023-08-26 17:43:14,078 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-26 17:43:14,078 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-26 17:43:14,078 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-26 17:43:14,078 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (2 of 7 remaining) [2023-08-26 17:43:14,078 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2023-08-26 17:43:14,078 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 7 remaining) [2023-08-26 17:43:14,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-26 17:43:14,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:14,279 INFO L445 BasicCegarLoop]: Path program histogram: [13, 2, 1, 1, 1, 1] [2023-08-26 17:43:14,281 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 17:43:14,281 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 17:43:14,282 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 05:43:14 BasicIcfg [2023-08-26 17:43:14,283 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 17:43:14,283 INFO L158 Benchmark]: Toolchain (without parser) took 19673.42ms. Allocated memory was 394.3MB in the beginning and 918.6MB in the end (delta: 524.3MB). Free memory was 351.4MB in the beginning and 541.5MB in the end (delta: -190.2MB). Peak memory consumption was 508.1MB. Max. memory is 16.0GB. [2023-08-26 17:43:14,283 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 394.3MB. Free memory was 371.9MB in the beginning and 371.7MB in the end (delta: 157.3kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 17:43:14,283 INFO L158 Benchmark]: CACSL2BoogieTranslator took 365.64ms. Allocated memory is still 394.3MB. Free memory was 351.1MB in the beginning and 331.1MB in the end (delta: 20.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-26 17:43:14,283 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.98ms. Allocated memory is still 394.3MB. Free memory was 331.1MB in the beginning and 329.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 17:43:14,283 INFO L158 Benchmark]: Boogie Preprocessor took 30.15ms. Allocated memory is still 394.3MB. Free memory was 329.1MB in the beginning and 328.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 17:43:14,284 INFO L158 Benchmark]: RCFGBuilder took 300.84ms. Allocated memory is still 394.3MB. Free memory was 328.0MB in the beginning and 313.4MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 17:43:14,284 INFO L158 Benchmark]: TraceAbstraction took 18935.55ms. Allocated memory was 394.3MB in the beginning and 918.6MB in the end (delta: 524.3MB). Free memory was 313.4MB in the beginning and 541.5MB in the end (delta: -228.2MB). Peak memory consumption was 470.3MB. Max. memory is 16.0GB. [2023-08-26 17:43:14,285 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 394.3MB. Free memory was 371.9MB in the beginning and 371.7MB in the end (delta: 157.3kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 365.64ms. Allocated memory is still 394.3MB. Free memory was 351.1MB in the beginning and 331.1MB in the end (delta: 20.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 34.98ms. Allocated memory is still 394.3MB. Free memory was 331.1MB in the beginning and 329.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 30.15ms. Allocated memory is still 394.3MB. Free memory was 329.1MB in the beginning and 328.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 300.84ms. Allocated memory is still 394.3MB. Free memory was 328.0MB in the beginning and 313.4MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 18935.55ms. Allocated memory was 394.3MB in the beginning and 918.6MB in the end (delta: 524.3MB). Free memory was 313.4MB in the beginning and 541.5MB in the end (delta: -228.2MB). Peak memory consumption was 470.3MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 245]: Unsoundness Warning unspecified type, defaulting to int C: short [245] - GenericResultAtLocation [Line: 245]: Unsoundness Warning unspecified type, defaulting to int C: short [245] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.7s, 75 PlacesBefore, 22 PlacesAfterwards, 74 TransitionsBefore, 18 TransitionsAfterwards, 1440 CoEnabledTransitionPairs, 6 FixpointIterations, 24 TrivialSequentialCompositions, 40 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 14 ConcurrentYvCompositions, 3 ChoiceCompositions, 81 TotalNumberOfCompositions, 1354 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1185, independent: 1156, independent conditional: 0, independent unconditional: 1156, dependent: 29, dependent conditional: 0, dependent unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 799, independent: 787, independent conditional: 0, independent unconditional: 787, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1185, independent: 369, independent conditional: 0, independent unconditional: 369, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 799, unknown conditional: 0, unknown unconditional: 799] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 16, Positive conditional cache size: 0, Positive unconditional cache size: 16, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 693]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 95 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 18.8s, OverallIterations: 19, TraceHistogramMax: 11, PathProgramHistogramMax: 13, EmptinessCheckTime: 0.0s, AutomataDifference: 10.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2866 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2866 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 251 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2856 IncrementalHoareTripleChecker+Invalid, 3107 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 251 mSolverCounterUnsat, 0 mSDtfsCounter, 2856 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 699 GetRequests, 219 SyntacticMatches, 35 SemanticMatches, 445 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6032 ImplicationChecksByTransitivity, 3.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5713occurred in iteration=18, InterpolantAutomatonStates: 327, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 427 NumberOfCodeBlocks, 427 NumberOfCodeBlocksAsserted, 55 NumberOfCheckSat, 544 ConstructedInterpolants, 0 QuantifiedInterpolants, 2224 SizeOfPredicates, 83 NumberOfNonLiveVariables, 1660 ConjunctsInSsa, 150 ConjunctsInUnsatCore, 38 InterpolantComputations, 10 PerfectInterpolantSequences, 190/875 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 5 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 17:43:14,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...