/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 14:22:32,629 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 14:22:32,700 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 14:22:32,704 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 14:22:32,704 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 14:22:32,732 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 14:22:32,733 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 14:22:32,734 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 14:22:32,734 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 14:22:32,738 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 14:22:32,738 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 14:22:32,739 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 14:22:32,739 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 14:22:32,740 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 14:22:32,740 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 14:22:32,740 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 14:22:32,741 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 14:22:32,741 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 14:22:32,741 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 14:22:32,741 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 14:22:32,741 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 14:22:32,742 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 14:22:32,742 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 14:22:32,742 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 14:22:32,743 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 14:22:32,743 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 14:22:32,743 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 14:22:32,743 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 14:22:32,743 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 14:22:32,744 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 14:22:32,745 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 14:22:32,745 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 14:22:32,745 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 14:22:32,745 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 14:22:32,745 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 14:22:32,746 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 14:22:33,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 14:22:33,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 14:22:33,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 14:22:33,110 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 14:22:33,112 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 14:22:33,114 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2023-08-26 14:22:34,254 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 14:22:34,492 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 14:22:34,492 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2023-08-26 14:22:34,505 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fee99242/db559f9bf68946b9ac4fa5346370effc/FLAGa0ead1890 [2023-08-26 14:22:34,520 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fee99242/db559f9bf68946b9ac4fa5346370effc [2023-08-26 14:22:34,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 14:22:34,526 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 14:22:34,528 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 14:22:34,529 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 14:22:34,532 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 14:22:34,532 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:22:34" (1/1) ... [2023-08-26 14:22:34,533 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f073790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:22:34, skipping insertion in model container [2023-08-26 14:22:34,533 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:22:34" (1/1) ... [2023-08-26 14:22:34,585 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 14:22:34,891 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 14:22:34,902 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 14:22:34,932 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-26 14:22:34,934 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-26 14:22:34,952 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 14:22:34,979 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 14:22:34,980 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 14:22:34,985 INFO L206 MainTranslator]: Completed translation [2023-08-26 14:22:34,986 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:22:34 WrapperNode [2023-08-26 14:22:34,986 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 14:22:34,987 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 14:22:34,987 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 14:22:34,987 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 14:22:34,992 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:22:34" (1/1) ... [2023-08-26 14:22:35,002 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:22:34" (1/1) ... [2023-08-26 14:22:35,018 INFO L138 Inliner]: procedures = 169, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2023-08-26 14:22:35,018 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 14:22:35,019 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 14:22:35,019 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 14:22:35,019 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 14:22:35,026 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:22:34" (1/1) ... [2023-08-26 14:22:35,026 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:22:34" (1/1) ... [2023-08-26 14:22:35,029 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:22:34" (1/1) ... [2023-08-26 14:22:35,029 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:22:34" (1/1) ... [2023-08-26 14:22:35,034 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:22:34" (1/1) ... [2023-08-26 14:22:35,037 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:22:34" (1/1) ... [2023-08-26 14:22:35,041 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:22:34" (1/1) ... [2023-08-26 14:22:35,042 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:22:34" (1/1) ... [2023-08-26 14:22:35,044 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 14:22:35,045 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 14:22:35,045 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 14:22:35,045 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 14:22:35,046 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:22:34" (1/1) ... [2023-08-26 14:22:35,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 14:22:35,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:22:35,074 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 14:22:35,096 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 14:22:35,105 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-26 14:22:35,109 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-26 14:22:35,109 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-26 14:22:35,110 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-26 14:22:35,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 14:22:35,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 14:22:35,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 14:22:35,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 14:22:35,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 14:22:35,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 14:22:35,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 14:22:35,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 14:22:35,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 14:22:35,112 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 14:22:35,214 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 14:22:35,215 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 14:22:35,425 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 14:22:35,430 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 14:22:35,430 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 14:22:35,435 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:22:35 BoogieIcfgContainer [2023-08-26 14:22:35,436 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 14:22:35,437 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 14:22:35,438 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 14:22:35,440 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 14:22:35,440 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 02:22:34" (1/3) ... [2023-08-26 14:22:35,442 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15dc8221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:22:35, skipping insertion in model container [2023-08-26 14:22:35,442 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:22:34" (2/3) ... [2023-08-26 14:22:35,443 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15dc8221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:22:35, skipping insertion in model container [2023-08-26 14:22:35,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:22:35" (3/3) ... [2023-08-26 14:22:35,444 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2023-08-26 14:22:35,460 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 14:22:35,460 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-08-26 14:22:35,461 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 14:22:35,540 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 14:22:35,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 162 flow [2023-08-26 14:22:35,626 INFO L124 PetriNetUnfolderBase]: 6/74 cut-off events. [2023-08-26 14:22:35,627 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 14:22:35,632 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 14:22:35,632 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 76 transitions, 162 flow [2023-08-26 14:22:35,637 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 74 transitions, 154 flow [2023-08-26 14:22:35,641 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 14:22:35,652 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 74 transitions, 154 flow [2023-08-26 14:22:35,659 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 74 transitions, 154 flow [2023-08-26 14:22:35,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 74 transitions, 154 flow [2023-08-26 14:22:35,688 INFO L124 PetriNetUnfolderBase]: 6/74 cut-off events. [2023-08-26 14:22:35,689 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 14:22:35,690 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 14:22:35,692 INFO L119 LiptonReduction]: Number of co-enabled transitions 1440 [2023-08-26 14:22:37,987 INFO L134 LiptonReduction]: Checked pairs total: 1354 [2023-08-26 14:22:37,988 INFO L136 LiptonReduction]: Total number of compositions: 81 [2023-08-26 14:22:37,998 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 14:22:38,002 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;@1280686f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 14:22:38,003 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-26 14:22:38,004 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 14:22:38,004 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 14:22:38,004 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 14:22:38,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:38,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 14:22:38,005 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 14:22:38,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:38,008 INFO L85 PathProgramCache]: Analyzing trace with hash 313, now seen corresponding path program 1 times [2023-08-26 14:22:38,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:38,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274242448] [2023-08-26 14:22:38,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:38,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:38,097 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 14:22:38,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:38,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274242448] [2023-08-26 14:22:38,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274242448] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:22:38,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:22:38,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 14:22:38,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577835294] [2023-08-26 14:22:38,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:22:38,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 14:22:38,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:38,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 14:22:38,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 14:22:38,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 157 [2023-08-26 14:22:38,131 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 14:22:38,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:38,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 157 [2023-08-26 14:22:38,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:38,173 INFO L124 PetriNetUnfolderBase]: 76/125 cut-off events. [2023-08-26 14:22:38,173 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 14:22:38,174 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 14:22:38,175 INFO L140 encePairwiseOnDemand]: 154/157 looper letters, 14 selfloop transitions, 0 changer transitions 1/15 dead transitions. [2023-08-26 14:22:38,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 15 transitions, 66 flow [2023-08-26 14:22:38,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 14:22:38,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 14:22:38,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 156 transitions. [2023-08-26 14:22:38,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968152866242038 [2023-08-26 14:22:38,186 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 156 transitions. [2023-08-26 14:22:38,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 156 transitions. [2023-08-26 14:22:38,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:38,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 156 transitions. [2023-08-26 14:22:38,194 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 14:22:38,198 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 14:22:38,199 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 14:22:38,200 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 42 flow. Second operand 2 states and 156 transitions. [2023-08-26 14:22:38,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 15 transitions, 66 flow [2023-08-26 14:22:38,202 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 14:22:38,203 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 32 flow [2023-08-26 14:22:38,204 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 14:22:38,207 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -3 predicate places. [2023-08-26 14:22:38,207 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 32 flow [2023-08-26 14:22:38,208 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 14:22:38,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:38,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 14:22:38,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 14:22:38,209 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 14:22:38,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:38,216 INFO L85 PathProgramCache]: Analyzing trace with hash 306362, now seen corresponding path program 1 times [2023-08-26 14:22:38,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:38,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997206793] [2023-08-26 14:22:38,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:38,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:38,427 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 14:22:38,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:38,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997206793] [2023-08-26 14:22:38,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997206793] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:22:38,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:22:38,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 14:22:38,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985027349] [2023-08-26 14:22:38,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:22:38,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 14:22:38,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:38,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 14:22:38,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 14:22:38,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 157 [2023-08-26 14:22:38,431 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 14:22:38,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:38,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 157 [2023-08-26 14:22:38,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:38,454 INFO L124 PetriNetUnfolderBase]: 55/92 cut-off events. [2023-08-26 14:22:38,454 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 14:22:38,456 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 14:22:38,457 INFO L140 encePairwiseOnDemand]: 155/157 looper letters, 12 selfloop transitions, 1 changer transitions 0/13 dead transitions. [2023-08-26 14:22:38,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 13 transitions, 56 flow [2023-08-26 14:22:38,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:22:38,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:22:38,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2023-08-26 14:22:38,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39278131634819535 [2023-08-26 14:22:38,459 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2023-08-26 14:22:38,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2023-08-26 14:22:38,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:38,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2023-08-26 14:22:38,460 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 14:22:38,462 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 14:22:38,462 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 14:22:38,462 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 32 flow. Second operand 3 states and 185 transitions. [2023-08-26 14:22:38,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 13 transitions, 56 flow [2023-08-26 14:22:38,462 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 14:22:38,463 INFO L231 Difference]: Finished difference. Result has 19 places, 13 transitions, 32 flow [2023-08-26 14:22:38,463 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 14:22:38,464 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -3 predicate places. [2023-08-26 14:22:38,464 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 13 transitions, 32 flow [2023-08-26 14:22:38,464 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 14:22:38,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:38,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 14:22:38,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 14:22:38,465 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 14:22:38,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:38,465 INFO L85 PathProgramCache]: Analyzing trace with hash 306361, now seen corresponding path program 1 times [2023-08-26 14:22:38,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:38,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966203083] [2023-08-26 14:22:38,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:38,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:38,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:38,528 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 14:22:38,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:38,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966203083] [2023-08-26 14:22:38,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966203083] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:22:38,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:22:38,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 14:22:38,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204807084] [2023-08-26 14:22:38,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:22:38,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 14:22:38,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:38,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 14:22:38,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 14:22:38,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 157 [2023-08-26 14:22:38,531 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 14:22:38,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:38,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 157 [2023-08-26 14:22:38,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:38,554 INFO L124 PetriNetUnfolderBase]: 52/86 cut-off events. [2023-08-26 14:22:38,555 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 14:22:38,555 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 14:22:38,556 INFO L140 encePairwiseOnDemand]: 155/157 looper letters, 11 selfloop transitions, 1 changer transitions 0/12 dead transitions. [2023-08-26 14:22:38,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 12 transitions, 54 flow [2023-08-26 14:22:38,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:22:38,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:22:38,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 178 transitions. [2023-08-26 14:22:38,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37791932059447986 [2023-08-26 14:22:38,558 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 178 transitions. [2023-08-26 14:22:38,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 178 transitions. [2023-08-26 14:22:38,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:38,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 178 transitions. [2023-08-26 14:22:38,559 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 14:22:38,560 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 14:22:38,561 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 14:22:38,561 INFO L175 Difference]: Start difference. First operand has 19 places, 13 transitions, 32 flow. Second operand 3 states and 178 transitions. [2023-08-26 14:22:38,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 12 transitions, 54 flow [2023-08-26 14:22:38,561 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 14:22:38,562 INFO L231 Difference]: Finished difference. Result has 19 places, 12 transitions, 31 flow [2023-08-26 14:22:38,562 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 14:22:38,562 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -3 predicate places. [2023-08-26 14:22:38,563 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 12 transitions, 31 flow [2023-08-26 14:22:38,563 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 14:22:38,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:38,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 14:22:38,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 14:22:38,563 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 14:22:38,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:38,564 INFO L85 PathProgramCache]: Analyzing trace with hash 537039974, now seen corresponding path program 1 times [2023-08-26 14:22:38,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:38,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031417230] [2023-08-26 14:22:38,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:38,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:38,669 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 14:22:38,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:38,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031417230] [2023-08-26 14:22:38,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031417230] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:22:38,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:22:38,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 14:22:38,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625845965] [2023-08-26 14:22:38,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:22:38,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 14:22:38,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:38,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 14:22:38,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 14:22:38,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 14:22:38,672 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 14:22:38,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:38,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 14:22:38,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:38,735 INFO L124 PetriNetUnfolderBase]: 64/107 cut-off events. [2023-08-26 14:22:38,735 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 14:22:38,738 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 14:22:38,741 INFO L140 encePairwiseOnDemand]: 153/157 looper letters, 18 selfloop transitions, 4 changer transitions 2/24 dead transitions. [2023-08-26 14:22:38,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 103 flow [2023-08-26 14:22:38,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 14:22:38,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 14:22:38,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 265 transitions. [2023-08-26 14:22:38,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42197452229299365 [2023-08-26 14:22:38,748 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 265 transitions. [2023-08-26 14:22:38,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 265 transitions. [2023-08-26 14:22:38,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:38,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 265 transitions. [2023-08-26 14:22:38,750 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 14:22:38,754 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 14:22:38,754 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 14:22:38,754 INFO L175 Difference]: Start difference. First operand has 19 places, 12 transitions, 31 flow. Second operand 4 states and 265 transitions. [2023-08-26 14:22:38,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 103 flow [2023-08-26 14:22:38,755 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 14:22:38,755 INFO L231 Difference]: Finished difference. Result has 23 places, 15 transitions, 55 flow [2023-08-26 14:22:38,755 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 14:22:38,757 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2023-08-26 14:22:38,757 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 15 transitions, 55 flow [2023-08-26 14:22:38,758 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 14:22:38,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:38,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:22:38,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 14:22:38,758 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 14:22:38,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:38,759 INFO L85 PathProgramCache]: Analyzing trace with hash 698883682, now seen corresponding path program 1 times [2023-08-26 14:22:38,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:38,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441415870] [2023-08-26 14:22:38,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:38,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:38,899 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 14:22:38,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:38,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441415870] [2023-08-26 14:22:38,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441415870] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:22:38,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:22:38,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 14:22:38,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508005573] [2023-08-26 14:22:38,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:22:38,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 14:22:38,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:38,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 14:22:38,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 14:22:38,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 14:22:38,907 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 14:22:38,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:38,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 14:22:38,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:39,002 INFO L124 PetriNetUnfolderBase]: 126/217 cut-off events. [2023-08-26 14:22:39,006 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2023-08-26 14:22:39,008 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 14:22:39,009 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 33 selfloop transitions, 9 changer transitions 0/42 dead transitions. [2023-08-26 14:22:39,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 42 transitions, 217 flow [2023-08-26 14:22:39,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 14:22:39,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 14:22:39,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 398 transitions. [2023-08-26 14:22:39,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42250530785562634 [2023-08-26 14:22:39,011 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 398 transitions. [2023-08-26 14:22:39,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 398 transitions. [2023-08-26 14:22:39,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:39,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 398 transitions. [2023-08-26 14:22:39,012 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 14:22:39,014 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 14:22:39,014 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 14:22:39,015 INFO L175 Difference]: Start difference. First operand has 23 places, 15 transitions, 55 flow. Second operand 6 states and 398 transitions. [2023-08-26 14:22:39,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 42 transitions, 217 flow [2023-08-26 14:22:39,016 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 14:22:39,017 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 136 flow [2023-08-26 14:22:39,017 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 14:22:39,019 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 10 predicate places. [2023-08-26 14:22:39,019 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 136 flow [2023-08-26 14:22:39,020 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 14:22:39,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:39,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:22:39,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 14:22:39,021 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 14:22:39,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:39,023 INFO L85 PathProgramCache]: Analyzing trace with hash 698901352, now seen corresponding path program 2 times [2023-08-26 14:22:39,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:39,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047697688] [2023-08-26 14:22:39,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:39,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:39,136 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 14:22:39,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:39,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047697688] [2023-08-26 14:22:39,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047697688] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:22:39,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:22:39,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 14:22:39,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023094582] [2023-08-26 14:22:39,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:22:39,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 14:22:39,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:39,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 14:22:39,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 14:22:39,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 14:22:39,140 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 14:22:39,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:39,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 14:22:39,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:39,224 INFO L124 PetriNetUnfolderBase]: 114/199 cut-off events. [2023-08-26 14:22:39,225 INFO L125 PetriNetUnfolderBase]: For 280/280 co-relation queries the response was YES. [2023-08-26 14:22:39,225 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 14:22:39,226 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 29 selfloop transitions, 9 changer transitions 4/42 dead transitions. [2023-08-26 14:22:39,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 42 transitions, 286 flow [2023-08-26 14:22:39,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 14:22:39,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 14:22:39,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 333 transitions. [2023-08-26 14:22:39,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42420382165605097 [2023-08-26 14:22:39,228 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 333 transitions. [2023-08-26 14:22:39,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 333 transitions. [2023-08-26 14:22:39,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:39,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 333 transitions. [2023-08-26 14:22:39,229 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 14:22:39,233 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 14:22:39,233 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 14:22:39,233 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 136 flow. Second operand 5 states and 333 transitions. [2023-08-26 14:22:39,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 42 transitions, 286 flow [2023-08-26 14:22:39,237 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 14:22:39,238 INFO L231 Difference]: Finished difference. Result has 38 places, 26 transitions, 184 flow [2023-08-26 14:22:39,239 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 14:22:39,241 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 16 predicate places. [2023-08-26 14:22:39,244 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 184 flow [2023-08-26 14:22:39,244 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 14:22:39,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:39,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:22:39,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 14:22:39,245 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 14:22:39,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:39,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1937873995, now seen corresponding path program 1 times [2023-08-26 14:22:39,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:39,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274777160] [2023-08-26 14:22:39,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:39,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:39,353 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 14:22:39,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:39,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274777160] [2023-08-26 14:22:39,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274777160] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:22:39,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:22:39,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 14:22:39,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573938195] [2023-08-26 14:22:39,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:22:39,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 14:22:39,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:39,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 14:22:39,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-26 14:22:39,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 14:22:39,357 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 14:22:39,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:39,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 14:22:39,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:39,505 INFO L124 PetriNetUnfolderBase]: 126/219 cut-off events. [2023-08-26 14:22:39,505 INFO L125 PetriNetUnfolderBase]: For 533/533 co-relation queries the response was YES. [2023-08-26 14:22:39,506 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 14:22:39,507 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 32 selfloop transitions, 16 changer transitions 11/59 dead transitions. [2023-08-26 14:22:39,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 427 flow [2023-08-26 14:22:39,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 14:22:39,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 14:22:39,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 592 transitions. [2023-08-26 14:22:39,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.418966737438075 [2023-08-26 14:22:39,509 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 592 transitions. [2023-08-26 14:22:39,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 592 transitions. [2023-08-26 14:22:39,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:39,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 592 transitions. [2023-08-26 14:22:39,511 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 14:22:39,513 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 14:22:39,513 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 14:22:39,514 INFO L175 Difference]: Start difference. First operand has 38 places, 26 transitions, 184 flow. Second operand 9 states and 592 transitions. [2023-08-26 14:22:39,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 427 flow [2023-08-26 14:22:39,517 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 14:22:39,518 INFO L231 Difference]: Finished difference. Result has 45 places, 32 transitions, 253 flow [2023-08-26 14:22:39,518 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 14:22:39,518 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 23 predicate places. [2023-08-26 14:22:39,519 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 32 transitions, 253 flow [2023-08-26 14:22:39,519 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 14:22:39,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:39,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:22:39,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 14:22:39,519 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 14:22:39,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:39,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1938173455, now seen corresponding path program 2 times [2023-08-26 14:22:39,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:39,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106682428] [2023-08-26 14:22:39,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:39,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:39,603 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 14:22:39,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:39,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106682428] [2023-08-26 14:22:39,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106682428] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:22:39,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:22:39,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 14:22:39,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104137476] [2023-08-26 14:22:39,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:22:39,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 14:22:39,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:39,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 14:22:39,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 14:22:39,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 14:22:39,605 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 14:22:39,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:39,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 14:22:39,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:39,705 INFO L124 PetriNetUnfolderBase]: 162/283 cut-off events. [2023-08-26 14:22:39,705 INFO L125 PetriNetUnfolderBase]: For 793/793 co-relation queries the response was YES. [2023-08-26 14:22:39,707 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 14:22:39,708 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 38 selfloop transitions, 20 changer transitions 3/61 dead transitions. [2023-08-26 14:22:39,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 61 transitions, 499 flow [2023-08-26 14:22:39,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 14:22:39,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 14:22:39,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 526 transitions. [2023-08-26 14:22:39,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41878980891719747 [2023-08-26 14:22:39,711 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 526 transitions. [2023-08-26 14:22:39,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 526 transitions. [2023-08-26 14:22:39,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:39,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 526 transitions. [2023-08-26 14:22:39,712 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 14:22:39,714 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 14:22:39,714 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 14:22:39,714 INFO L175 Difference]: Start difference. First operand has 45 places, 32 transitions, 253 flow. Second operand 8 states and 526 transitions. [2023-08-26 14:22:39,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 61 transitions, 499 flow [2023-08-26 14:22:39,720 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 14:22:39,721 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 346 flow [2023-08-26 14:22:39,721 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 14:22:39,723 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 32 predicate places. [2023-08-26 14:22:39,723 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 346 flow [2023-08-26 14:22:39,723 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 14:22:39,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:39,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:22:39,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 14:22:39,724 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 14:22:39,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:39,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1978408975, now seen corresponding path program 3 times [2023-08-26 14:22:39,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:39,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921438171] [2023-08-26 14:22:39,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:39,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:39,817 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 14:22:39,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:39,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921438171] [2023-08-26 14:22:39,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921438171] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:22:39,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:22:39,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 14:22:39,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454303058] [2023-08-26 14:22:39,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:22:39,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 14:22:39,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:39,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 14:22:39,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-26 14:22:39,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 14:22:39,820 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 14:22:39,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:39,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 14:22:39,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:39,934 INFO L124 PetriNetUnfolderBase]: 150/263 cut-off events. [2023-08-26 14:22:39,934 INFO L125 PetriNetUnfolderBase]: For 1223/1223 co-relation queries the response was YES. [2023-08-26 14:22:39,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1194 conditions, 263 events. 150/263 cut-off events. For 1223/1223 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 893 event pairs, 22 based on Foata normal form. 8/271 useless extension candidates. Maximal degree in co-relation 1174. Up to 65 conditions per place. [2023-08-26 14:22:39,936 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 30 selfloop transitions, 20 changer transitions 8/58 dead transitions. [2023-08-26 14:22:39,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 58 transitions, 568 flow [2023-08-26 14:22:39,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 14:22:39,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 14:22:39,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 460 transitions. [2023-08-26 14:22:39,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41856232939035487 [2023-08-26 14:22:39,939 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 460 transitions. [2023-08-26 14:22:39,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 460 transitions. [2023-08-26 14:22:39,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:39,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 460 transitions. [2023-08-26 14:22:39,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 65.71428571428571) internal successors, (460), 7 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:39,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:39,942 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:39,942 INFO L175 Difference]: Start difference. First operand has 54 places, 38 transitions, 346 flow. Second operand 7 states and 460 transitions. [2023-08-26 14:22:39,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 58 transitions, 568 flow [2023-08-26 14:22:39,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 58 transitions, 533 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-26 14:22:39,950 INFO L231 Difference]: Finished difference. Result has 59 places, 39 transitions, 390 flow [2023-08-26 14:22:39,950 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=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=390, PETRI_PLACES=59, PETRI_TRANSITIONS=39} [2023-08-26 14:22:39,951 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 37 predicate places. [2023-08-26 14:22:39,951 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 39 transitions, 390 flow [2023-08-26 14:22:39,952 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 14:22:39,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:39,952 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:22:39,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 14:22:39,952 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 14:22:39,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:39,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1201164613, now seen corresponding path program 4 times [2023-08-26 14:22:39,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:39,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464132408] [2023-08-26 14:22:39,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:39,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:39,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:40,056 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 14:22:40,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:40,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464132408] [2023-08-26 14:22:40,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464132408] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 14:22:40,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929897670] [2023-08-26 14:22:40,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 14:22:40,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:22:40,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:22:40,060 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 14:22:40,093 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 14:22:40,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 14:22:40,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 14:22:40,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 14:22:40,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 14:22:40,287 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 14:22:40,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 14:22:40,359 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 14:22:40,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929897670] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 14:22:40,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 14:22:40,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-26 14:22:40,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824055146] [2023-08-26 14:22:40,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 14:22:40,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 14:22:40,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:40,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 14:22:40,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-08-26 14:22:40,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 14:22:40,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 39 transitions, 390 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 14:22:40,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:40,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 14:22:40,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:40,602 INFO L124 PetriNetUnfolderBase]: 198/343 cut-off events. [2023-08-26 14:22:40,602 INFO L125 PetriNetUnfolderBase]: For 2136/2136 co-relation queries the response was YES. [2023-08-26 14:22:40,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1661 conditions, 343 events. 198/343 cut-off events. For 2136/2136 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1152 event pairs, 18 based on Foata normal form. 16/359 useless extension candidates. Maximal degree in co-relation 1639. Up to 87 conditions per place. [2023-08-26 14:22:40,605 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 34 selfloop transitions, 35 changer transitions 22/91 dead transitions. [2023-08-26 14:22:40,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 91 transitions, 948 flow [2023-08-26 14:22:40,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 14:22:40,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 14:22:40,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 914 transitions. [2023-08-26 14:22:40,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41583257506824384 [2023-08-26 14:22:40,608 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 914 transitions. [2023-08-26 14:22:40,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 914 transitions. [2023-08-26 14:22:40,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:40,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 914 transitions. [2023-08-26 14:22:40,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 65.28571428571429) internal successors, (914), 14 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:40,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 157.0) internal successors, (2355), 15 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:40,615 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 157.0) internal successors, (2355), 15 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:40,615 INFO L175 Difference]: Start difference. First operand has 59 places, 39 transitions, 390 flow. Second operand 14 states and 914 transitions. [2023-08-26 14:22:40,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 91 transitions, 948 flow [2023-08-26 14:22:40,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 91 transitions, 886 flow, removed 15 selfloop flow, removed 5 redundant places. [2023-08-26 14:22:40,622 INFO L231 Difference]: Finished difference. Result has 72 places, 55 transitions, 691 flow [2023-08-26 14:22:40,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=691, PETRI_PLACES=72, PETRI_TRANSITIONS=55} [2023-08-26 14:22:40,623 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 50 predicate places. [2023-08-26 14:22:40,623 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 55 transitions, 691 flow [2023-08-26 14:22:40,624 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 14:22:40,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:40,624 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:22:40,641 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 14:22:40,830 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 14:22:40,830 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 14:22:40,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:40,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1651254496, now seen corresponding path program 5 times [2023-08-26 14:22:40,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:40,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201140538] [2023-08-26 14:22:40,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:40,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:40,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 14:22:40,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:40,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201140538] [2023-08-26 14:22:40,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201140538] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 14:22:40,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648175912] [2023-08-26 14:22:40,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 14:22:40,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:22:40,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:22:40,980 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 14:22:41,004 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 14:22:41,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-26 14:22:41,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 14:22:41,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 14:22:41,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 14:22:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 14:22:41,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 14:22:41,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 14:22:41,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648175912] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 14:22:41,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 14:22:41,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-26 14:22:41,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035344616] [2023-08-26 14:22:41,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 14:22:41,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 14:22:41,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:41,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 14:22:41,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-08-26 14:22:41,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 14:22:41,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 55 transitions, 691 flow. Second operand has 16 states, 16 states have (on average 61.75) internal successors, (988), 16 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:41,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:41,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 14:22:41,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:41,509 INFO L124 PetriNetUnfolderBase]: 254/455 cut-off events. [2023-08-26 14:22:41,509 INFO L125 PetriNetUnfolderBase]: For 4621/4621 co-relation queries the response was YES. [2023-08-26 14:22:41,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2438 conditions, 455 events. 254/455 cut-off events. For 4621/4621 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1589 event pairs, 55 based on Foata normal form. 32/487 useless extension candidates. Maximal degree in co-relation 2411. Up to 249 conditions per place. [2023-08-26 14:22:41,513 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 65 selfloop transitions, 25 changer transitions 27/117 dead transitions. [2023-08-26 14:22:41,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 117 transitions, 1457 flow [2023-08-26 14:22:41,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-26 14:22:41,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-26 14:22:41,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1043 transitions. [2023-08-26 14:22:41,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41520700636942676 [2023-08-26 14:22:41,517 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1043 transitions. [2023-08-26 14:22:41,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1043 transitions. [2023-08-26 14:22:41,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:41,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1043 transitions. [2023-08-26 14:22:41,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 65.1875) internal successors, (1043), 16 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:41,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 157.0) internal successors, (2669), 17 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:41,523 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 157.0) internal successors, (2669), 17 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:41,523 INFO L175 Difference]: Start difference. First operand has 72 places, 55 transitions, 691 flow. Second operand 16 states and 1043 transitions. [2023-08-26 14:22:41,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 117 transitions, 1457 flow [2023-08-26 14:22:41,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 117 transitions, 1096 flow, removed 167 selfloop flow, removed 5 redundant places. [2023-08-26 14:22:41,542 INFO L231 Difference]: Finished difference. Result has 92 places, 69 transitions, 764 flow [2023-08-26 14:22:41,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=764, PETRI_PLACES=92, PETRI_TRANSITIONS=69} [2023-08-26 14:22:41,542 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 70 predicate places. [2023-08-26 14:22:41,543 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 69 transitions, 764 flow [2023-08-26 14:22:41,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 61.75) internal successors, (988), 16 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:41,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:41,543 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:22:41,556 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 14:22:41,748 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 14:22:41,749 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 14:22:41,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:41,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1714670042, now seen corresponding path program 6 times [2023-08-26 14:22:41,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:41,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844892762] [2023-08-26 14:22:41,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:41,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 14:22:41,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:41,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844892762] [2023-08-26 14:22:41,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844892762] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 14:22:41,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702207613] [2023-08-26 14:22:41,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 14:22:41,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:22:41,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:22:41,878 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 14:22:41,905 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 14:22:41,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-26 14:22:41,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 14:22:41,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 14:22:41,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 14:22:42,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 14:22:42,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 14:22:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 14:22:42,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702207613] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 14:22:42,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 14:22:42,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-26 14:22:42,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482889544] [2023-08-26 14:22:42,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 14:22:42,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-26 14:22:42,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:42,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-26 14:22:42,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-08-26 14:22:42,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 14:22:42,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 69 transitions, 764 flow. Second operand has 17 states, 17 states have (on average 61.8235294117647) internal successors, (1051), 17 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:42,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:42,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 14:22:42,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:42,584 INFO L124 PetriNetUnfolderBase]: 408/747 cut-off events. [2023-08-26 14:22:42,584 INFO L125 PetriNetUnfolderBase]: For 12685/12685 co-relation queries the response was YES. [2023-08-26 14:22:42,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4034 conditions, 747 events. 408/747 cut-off events. For 12685/12685 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3284 event pairs, 44 based on Foata normal form. 32/779 useless extension candidates. Maximal degree in co-relation 3998. Up to 227 conditions per place. [2023-08-26 14:22:42,590 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 73 selfloop transitions, 71 changer transitions 37/181 dead transitions. [2023-08-26 14:22:42,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 181 transitions, 2080 flow [2023-08-26 14:22:42,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 14:22:42,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-26 14:22:42,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1434 transitions. [2023-08-26 14:22:42,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4151708164447018 [2023-08-26 14:22:42,595 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1434 transitions. [2023-08-26 14:22:42,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1434 transitions. [2023-08-26 14:22:42,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:42,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1434 transitions. [2023-08-26 14:22:42,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 65.18181818181819) internal successors, (1434), 22 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:42,603 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 14:22:42,604 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 14:22:42,604 INFO L175 Difference]: Start difference. First operand has 92 places, 69 transitions, 764 flow. Second operand 22 states and 1434 transitions. [2023-08-26 14:22:42,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 181 transitions, 2080 flow [2023-08-26 14:22:42,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 181 transitions, 1988 flow, removed 38 selfloop flow, removed 4 redundant places. [2023-08-26 14:22:42,637 INFO L231 Difference]: Finished difference. Result has 123 places, 107 transitions, 1491 flow [2023-08-26 14:22:42,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1491, PETRI_PLACES=123, PETRI_TRANSITIONS=107} [2023-08-26 14:22:42,638 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 101 predicate places. [2023-08-26 14:22:42,638 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 107 transitions, 1491 flow [2023-08-26 14:22:42,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 61.8235294117647) internal successors, (1051), 17 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:42,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:42,639 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:22:42,646 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 14:22:42,843 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 14:22:42,844 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 14:22:42,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:42,844 INFO L85 PathProgramCache]: Analyzing trace with hash -2039594720, now seen corresponding path program 7 times [2023-08-26 14:22:42,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:42,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870879673] [2023-08-26 14:22:42,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:42,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:42,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 14:22:42,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:42,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870879673] [2023-08-26 14:22:42,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870879673] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 14:22:42,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307025924] [2023-08-26 14:22:42,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 14:22:42,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:22:42,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:22:42,960 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 14:22:42,963 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 14:22:43,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:43,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 14:22:43,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 14:22:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 14:22:43,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 14:22:43,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 14:22:43,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307025924] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 14:22:43,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 14:22:43,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-26 14:22:43,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015023555] [2023-08-26 14:22:43,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 14:22:43,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-26 14:22:43,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:43,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-26 14:22:43,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2023-08-26 14:22:43,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 14:22:43,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 107 transitions, 1491 flow. Second operand has 17 states, 17 states have (on average 61.76470588235294) internal successors, (1050), 17 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:43,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:43,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 14:22:43,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:43,831 INFO L124 PetriNetUnfolderBase]: 572/1027 cut-off events. [2023-08-26 14:22:43,831 INFO L125 PetriNetUnfolderBase]: For 34544/34544 co-relation queries the response was YES. [2023-08-26 14:22:43,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7293 conditions, 1027 events. 572/1027 cut-off events. For 34544/34544 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4775 event pairs, 20 based on Foata normal form. 32/1059 useless extension candidates. Maximal degree in co-relation 7242. Up to 327 conditions per place. [2023-08-26 14:22:43,842 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 61 selfloop transitions, 127 changer transitions 48/236 dead transitions. [2023-08-26 14:22:43,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 236 transitions, 3639 flow [2023-08-26 14:22:43,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-26 14:22:43,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-26 14:22:43,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1760 transitions. [2023-08-26 14:22:43,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4151922623260203 [2023-08-26 14:22:43,847 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1760 transitions. [2023-08-26 14:22:43,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1760 transitions. [2023-08-26 14:22:43,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:43,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1760 transitions. [2023-08-26 14:22:43,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 65.18518518518519) internal successors, (1760), 27 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:43,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 157.0) internal successors, (4396), 28 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:43,857 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 157.0) internal successors, (4396), 28 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:43,857 INFO L175 Difference]: Start difference. First operand has 123 places, 107 transitions, 1491 flow. Second operand 27 states and 1760 transitions. [2023-08-26 14:22:43,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 236 transitions, 3639 flow [2023-08-26 14:22:43,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 236 transitions, 3315 flow, removed 148 selfloop flow, removed 7 redundant places. [2023-08-26 14:22:43,938 INFO L231 Difference]: Finished difference. Result has 157 places, 149 transitions, 2482 flow [2023-08-26 14:22:43,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2482, PETRI_PLACES=157, PETRI_TRANSITIONS=149} [2023-08-26 14:22:43,939 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 135 predicate places. [2023-08-26 14:22:43,939 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 149 transitions, 2482 flow [2023-08-26 14:22:43,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 61.76470588235294) internal successors, (1050), 17 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:43,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:43,940 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:22:43,951 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 14:22:44,145 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 14:22:44,146 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 14:22:44,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:44,146 INFO L85 PathProgramCache]: Analyzing trace with hash 531927744, now seen corresponding path program 8 times [2023-08-26 14:22:44,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:44,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695903931] [2023-08-26 14:22:44,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:44,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:44,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:22:44,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:44,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695903931] [2023-08-26 14:22:44,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695903931] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 14:22:44,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094367848] [2023-08-26 14:22:44,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 14:22:44,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:22:44,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:22:44,291 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 14:22:44,317 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 14:22:44,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 14:22:44,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 14:22:44,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-26 14:22:44,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 14:22:44,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:22:44,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 14:22:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:22:44,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094367848] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 14:22:44,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 14:22:44,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-08-26 14:22:44,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273738822] [2023-08-26 14:22:44,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 14:22:44,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-26 14:22:44,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:44,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-26 14:22:44,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2023-08-26 14:22:44,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 14:22:44,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 149 transitions, 2482 flow. Second operand has 24 states, 24 states have (on average 61.458333333333336) internal successors, (1475), 24 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:44,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:44,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 14:22:44,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:45,285 INFO L124 PetriNetUnfolderBase]: 672/1203 cut-off events. [2023-08-26 14:22:45,286 INFO L125 PetriNetUnfolderBase]: For 57710/57710 co-relation queries the response was YES. [2023-08-26 14:22:45,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10620 conditions, 1203 events. 672/1203 cut-off events. For 57710/57710 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5662 event pairs, 27 based on Foata normal form. 12/1215 useless extension candidates. Maximal degree in co-relation 10554. Up to 390 conditions per place. [2023-08-26 14:22:45,302 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 72 selfloop transitions, 139 changer transitions 40/251 dead transitions. [2023-08-26 14:22:45,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 251 transitions, 4832 flow [2023-08-26 14:22:45,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-26 14:22:45,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-26 14:22:45,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1626 transitions. [2023-08-26 14:22:45,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41426751592356686 [2023-08-26 14:22:45,306 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1626 transitions. [2023-08-26 14:22:45,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1626 transitions. [2023-08-26 14:22:45,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:45,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1626 transitions. [2023-08-26 14:22:45,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 65.04) internal successors, (1626), 25 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:45,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 157.0) internal successors, (4082), 26 states have internal predecessors, (4082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:45,315 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 157.0) internal successors, (4082), 26 states have internal predecessors, (4082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:45,315 INFO L175 Difference]: Start difference. First operand has 157 places, 149 transitions, 2482 flow. Second operand 25 states and 1626 transitions. [2023-08-26 14:22:45,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 251 transitions, 4832 flow [2023-08-26 14:22:45,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 251 transitions, 3702 flow, removed 542 selfloop flow, removed 10 redundant places. [2023-08-26 14:22:45,525 INFO L231 Difference]: Finished difference. Result has 179 places, 179 transitions, 2846 flow [2023-08-26 14:22:45,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=1914, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2846, PETRI_PLACES=179, PETRI_TRANSITIONS=179} [2023-08-26 14:22:45,526 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 157 predicate places. [2023-08-26 14:22:45,526 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 179 transitions, 2846 flow [2023-08-26 14:22:45,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 61.458333333333336) internal successors, (1475), 24 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:45,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:45,527 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:22:45,535 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 14:22:45,732 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 14:22:45,733 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 14:22:45,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:45,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1880062792, now seen corresponding path program 9 times [2023-08-26 14:22:45,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:45,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79511548] [2023-08-26 14:22:45,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:45,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:22:45,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:45,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79511548] [2023-08-26 14:22:45,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79511548] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 14:22:45,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994600353] [2023-08-26 14:22:45,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 14:22:45,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:22:45,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:22:45,820 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 14:22:45,823 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 14:22:45,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-26 14:22:45,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 14:22:45,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-26 14:22:45,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 14:22:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:22:45,919 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 14:22:45,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994600353] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:22:45,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 14:22:45,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2023-08-26 14:22:45,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217882479] [2023-08-26 14:22:45,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:22:45,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 14:22:45,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:45,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 14:22:45,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-08-26 14:22:45,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 157 [2023-08-26 14:22:45,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 179 transitions, 2846 flow. Second operand has 8 states, 8 states have (on average 65.375) internal successors, (523), 8 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:45,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:45,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 157 [2023-08-26 14:22:45,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:46,335 INFO L124 PetriNetUnfolderBase]: 1331/2222 cut-off events. [2023-08-26 14:22:46,335 INFO L125 PetriNetUnfolderBase]: For 78377/78377 co-relation queries the response was YES. [2023-08-26 14:22:46,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15347 conditions, 2222 events. 1331/2222 cut-off events. For 78377/78377 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 11866 event pairs, 59 based on Foata normal form. 213/2435 useless extension candidates. Maximal degree in co-relation 15274. Up to 972 conditions per place. [2023-08-26 14:22:46,359 INFO L140 encePairwiseOnDemand]: 154/157 looper letters, 27 selfloop transitions, 7 changer transitions 463/497 dead transitions. [2023-08-26 14:22:46,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 497 transitions, 8470 flow [2023-08-26 14:22:46,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 14:22:46,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 14:22:46,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 551 transitions. [2023-08-26 14:22:46,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43869426751592355 [2023-08-26 14:22:46,361 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 551 transitions. [2023-08-26 14:22:46,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 551 transitions. [2023-08-26 14:22:46,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:46,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 551 transitions. [2023-08-26 14:22:46,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 68.875) internal successors, (551), 8 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:46,364 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 14:22:46,364 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 14:22:46,364 INFO L175 Difference]: Start difference. First operand has 179 places, 179 transitions, 2846 flow. Second operand 8 states and 551 transitions. [2023-08-26 14:22:46,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 497 transitions, 8470 flow [2023-08-26 14:22:46,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 497 transitions, 7834 flow, removed 188 selfloop flow, removed 11 redundant places. [2023-08-26 14:22:46,615 INFO L231 Difference]: Finished difference. Result has 173 places, 22 transitions, 274 flow [2023-08-26 14:22:46,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=2167, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=274, PETRI_PLACES=173, PETRI_TRANSITIONS=22} [2023-08-26 14:22:46,616 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 151 predicate places. [2023-08-26 14:22:46,617 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 22 transitions, 274 flow [2023-08-26 14:22:46,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 65.375) internal successors, (523), 8 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:46,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:46,617 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:22:46,627 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 14:22:46,829 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 14:22:46,829 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 14:22:46,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:46,830 INFO L85 PathProgramCache]: Analyzing trace with hash -875029135, now seen corresponding path program 10 times [2023-08-26 14:22:46,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:46,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083766305] [2023-08-26 14:22:46,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:46,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:22:46,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:46,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083766305] [2023-08-26 14:22:46,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083766305] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 14:22:46,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625082055] [2023-08-26 14:22:46,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 14:22:46,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:22:46,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:22:46,931 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 14:22:46,933 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 14:22:46,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 14:22:46,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 14:22:46,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-26 14:22:46,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 14:22:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:22:47,017 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 14:22:47,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625082055] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:22:47,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 14:22:47,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2023-08-26 14:22:47,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167477522] [2023-08-26 14:22:47,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:22:47,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 14:22:47,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:47,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 14:22:47,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-08-26 14:22:47,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 157 [2023-08-26 14:22:47,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 22 transitions, 274 flow. Second operand has 8 states, 8 states have (on average 65.375) internal successors, (523), 8 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:47,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:47,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 157 [2023-08-26 14:22:47,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:47,089 INFO L124 PetriNetUnfolderBase]: 68/141 cut-off events. [2023-08-26 14:22:47,089 INFO L125 PetriNetUnfolderBase]: For 3182/3182 co-relation queries the response was YES. [2023-08-26 14:22:47,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1069 conditions, 141 events. 68/141 cut-off events. For 3182/3182 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 353 event pairs, 6 based on Foata normal form. 14/155 useless extension candidates. Maximal degree in co-relation 998. Up to 68 conditions per place. [2023-08-26 14:22:47,091 INFO L140 encePairwiseOnDemand]: 154/157 looper letters, 0 selfloop transitions, 0 changer transitions 67/67 dead transitions. [2023-08-26 14:22:47,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 67 transitions, 813 flow [2023-08-26 14:22:47,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 14:22:47,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 14:22:47,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 548 transitions. [2023-08-26 14:22:47,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43630573248407645 [2023-08-26 14:22:47,092 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 548 transitions. [2023-08-26 14:22:47,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 548 transitions. [2023-08-26 14:22:47,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:47,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 548 transitions. [2023-08-26 14:22:47,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 68.5) internal successors, (548), 8 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:47,095 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 14:22:47,095 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 14:22:47,096 INFO L175 Difference]: Start difference. First operand has 173 places, 22 transitions, 274 flow. Second operand 8 states and 548 transitions. [2023-08-26 14:22:47,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 67 transitions, 813 flow [2023-08-26 14:22:47,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 67 transitions, 439 flow, removed 95 selfloop flow, removed 43 redundant places. [2023-08-26 14:22:47,101 INFO L231 Difference]: Finished difference. Result has 76 places, 0 transitions, 0 flow [2023-08-26 14:22:47,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=76, PETRI_TRANSITIONS=0} [2023-08-26 14:22:47,102 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 54 predicate places. [2023-08-26 14:22:47,102 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 0 transitions, 0 flow [2023-08-26 14:22:47,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 65.375) internal successors, (523), 8 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:47,104 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 7 remaining) [2023-08-26 14:22:47,104 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-26 14:22:47,104 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-26 14:22:47,105 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-26 14:22:47,105 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (2 of 7 remaining) [2023-08-26 14:22:47,105 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2023-08-26 14:22:47,105 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 7 remaining) [2023-08-26 14:22:47,116 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 14:22:47,317 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 14:22:47,317 INFO L445 BasicCegarLoop]: Path program histogram: [10, 2, 1, 1, 1, 1] [2023-08-26 14:22:47,320 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 14:22:47,320 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 14:22:47,323 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 02:22:47 BasicIcfg [2023-08-26 14:22:47,323 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 14:22:47,324 INFO L158 Benchmark]: Toolchain (without parser) took 12797.60ms. Allocated memory was 362.8MB in the beginning and 570.4MB in the end (delta: 207.6MB). Free memory was 337.7MB in the beginning and 505.8MB in the end (delta: -168.1MB). Peak memory consumption was 42.2MB. Max. memory is 16.0GB. [2023-08-26 14:22:47,324 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 362.8MB. Free memory was 340.3MB in the beginning and 340.2MB in the end (delta: 94.3kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 14:22:47,324 INFO L158 Benchmark]: CACSL2BoogieTranslator took 457.80ms. Allocated memory is still 362.8MB. Free memory was 337.2MB in the beginning and 318.4MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 14:22:47,324 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.86ms. Allocated memory is still 362.8MB. Free memory was 317.9MB in the beginning and 316.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 14:22:47,325 INFO L158 Benchmark]: Boogie Preprocessor took 25.05ms. Allocated memory is still 362.8MB. Free memory was 316.3MB in the beginning and 314.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 14:22:47,325 INFO L158 Benchmark]: RCFGBuilder took 390.88ms. Allocated memory is still 362.8MB. Free memory was 314.7MB in the beginning and 301.1MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-26 14:22:47,325 INFO L158 Benchmark]: TraceAbstraction took 11885.74ms. Allocated memory was 362.8MB in the beginning and 570.4MB in the end (delta: 207.6MB). Free memory was 300.6MB in the beginning and 505.8MB in the end (delta: -205.2MB). Peak memory consumption was 6.5MB. Max. memory is 16.0GB. [2023-08-26 14:22:47,326 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 362.8MB. Free memory was 340.3MB in the beginning and 340.2MB in the end (delta: 94.3kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 457.80ms. Allocated memory is still 362.8MB. Free memory was 337.2MB in the beginning and 318.4MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 31.86ms. Allocated memory is still 362.8MB. Free memory was 317.9MB in the beginning and 316.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 25.05ms. Allocated memory is still 362.8MB. Free memory was 316.3MB in the beginning and 314.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 390.88ms. Allocated memory is still 362.8MB. Free memory was 314.7MB in the beginning and 301.1MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 11885.74ms. Allocated memory was 362.8MB in the beginning and 570.4MB in the end (delta: 207.6MB). Free memory was 300.6MB in the beginning and 505.8MB in the end (delta: -205.2MB). Peak memory consumption was 6.5MB. 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: 2.3s, 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: 11.7s, OverallIterations: 16, TraceHistogramMax: 6, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 4.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 998 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 998 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 101 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1767 IncrementalHoareTripleChecker+Invalid, 1868 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 101 mSolverCounterUnsat, 0 mSDtfsCounter, 1767 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 340 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2846occurred in iteration=14, InterpolantAutomatonStates: 167, 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, 2.4s InterpolantComputationTime, 275 NumberOfCodeBlocks, 272 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 317 ConstructedInterpolants, 0 QuantifiedInterpolants, 1231 SizeOfPredicates, 27 NumberOfNonLiveVariables, 988 ConjunctsInSsa, 72 ConjunctsInUnsatCore, 28 InterpolantComputations, 11 PerfectInterpolantSequences, 95/214 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 14:22:47,347 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...