/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/weaver/parallel-misc-3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 13:23:13,416 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 13:23:13,475 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 13:23:13,478 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 13:23:13,478 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 13:23:13,507 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 13:23:13,507 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 13:23:13,511 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 13:23:13,511 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 13:23:13,514 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 13:23:13,514 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 13:23:13,515 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 13:23:13,515 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 13:23:13,515 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 13:23:13,515 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 13:23:13,515 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 13:23:13,516 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 13:23:13,516 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 13:23:13,516 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 13:23:13,516 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 13:23:13,516 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 13:23:13,517 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 13:23:13,517 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 13:23:13,518 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 13:23:13,518 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 13:23:13,518 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 13:23:13,518 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 13:23:13,518 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:23:13,519 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 13:23:13,519 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 13:23:13,519 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 13:23:13,520 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 13:23:13,520 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 13:23:13,520 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 13:23:13,520 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 13:23:13,520 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 13:23:13,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 13:23:13,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 13:23:13,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 13:23:13,775 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 13:23:13,775 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 13:23:13,776 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-3.wvr.c [2023-08-26 13:23:14,824 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 13:23:15,008 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 13:23:15,009 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-3.wvr.c [2023-08-26 13:23:15,015 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e13f2b46/12c5dbbb6c9a4bb28c78ce8bc5918e5b/FLAG410540bcc [2023-08-26 13:23:15,027 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e13f2b46/12c5dbbb6c9a4bb28c78ce8bc5918e5b [2023-08-26 13:23:15,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 13:23:15,033 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 13:23:15,034 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 13:23:15,034 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 13:23:15,037 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 13:23:15,037 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:23:15" (1/1) ... [2023-08-26 13:23:15,038 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b71548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:23:15, skipping insertion in model container [2023-08-26 13:23:15,038 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:23:15" (1/1) ... [2023-08-26 13:23:15,053 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 13:23:15,196 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:23:15,204 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 13:23:15,233 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:23:15,238 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 13:23:15,238 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 13:23:15,243 INFO L206 MainTranslator]: Completed translation [2023-08-26 13:23:15,243 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:23:15 WrapperNode [2023-08-26 13:23:15,243 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 13:23:15,244 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 13:23:15,244 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 13:23:15,244 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 13:23:15,250 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:23:15" (1/1) ... [2023-08-26 13:23:15,261 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:23:15" (1/1) ... [2023-08-26 13:23:15,277 INFO L138 Inliner]: procedures = 21, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2023-08-26 13:23:15,278 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 13:23:15,278 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 13:23:15,279 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 13:23:15,279 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 13:23:15,284 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:23:15" (1/1) ... [2023-08-26 13:23:15,285 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:23:15" (1/1) ... [2023-08-26 13:23:15,288 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:23:15" (1/1) ... [2023-08-26 13:23:15,289 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:23:15" (1/1) ... [2023-08-26 13:23:15,301 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:23:15" (1/1) ... [2023-08-26 13:23:15,303 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:23:15" (1/1) ... [2023-08-26 13:23:15,304 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:23:15" (1/1) ... [2023-08-26 13:23:15,305 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:23:15" (1/1) ... [2023-08-26 13:23:15,306 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 13:23:15,306 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 13:23:15,306 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 13:23:15,307 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 13:23:15,307 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:23:15" (1/1) ... [2023-08-26 13:23:15,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:23:15,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:23:15,348 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 13:23:15,350 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 13:23:15,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 13:23:15,382 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 13:23:15,382 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 13:23:15,382 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 13:23:15,382 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 13:23:15,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 13:23:15,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 13:23:15,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 13:23:15,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 13:23:15,383 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 13:23:15,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 13:23:15,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 13:23:15,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 13:23:15,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 13:23:15,384 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 13:23:15,462 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 13:23:15,464 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 13:23:15,682 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 13:23:15,702 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 13:23:15,702 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 13:23:15,704 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:23:15 BoogieIcfgContainer [2023-08-26 13:23:15,704 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 13:23:15,705 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 13:23:15,705 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 13:23:15,707 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 13:23:15,707 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 01:23:15" (1/3) ... [2023-08-26 13:23:15,708 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bba40e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:23:15, skipping insertion in model container [2023-08-26 13:23:15,708 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:23:15" (2/3) ... [2023-08-26 13:23:15,708 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bba40e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:23:15, skipping insertion in model container [2023-08-26 13:23:15,708 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:23:15" (3/3) ... [2023-08-26 13:23:15,709 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-3.wvr.c [2023-08-26 13:23:15,720 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 13:23:15,721 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-26 13:23:15,721 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 13:23:15,788 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 13:23:15,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 101 transitions, 218 flow [2023-08-26 13:23:15,868 INFO L124 PetriNetUnfolderBase]: 11/99 cut-off events. [2023-08-26 13:23:15,868 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 13:23:15,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 99 events. 11/99 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 130 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 53. Up to 4 conditions per place. [2023-08-26 13:23:15,873 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 101 transitions, 218 flow [2023-08-26 13:23:15,876 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 90 transitions, 192 flow [2023-08-26 13:23:15,879 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 13:23:15,887 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 90 transitions, 192 flow [2023-08-26 13:23:15,892 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 90 transitions, 192 flow [2023-08-26 13:23:15,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 90 transitions, 192 flow [2023-08-26 13:23:15,916 INFO L124 PetriNetUnfolderBase]: 11/90 cut-off events. [2023-08-26 13:23:15,916 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 13:23:15,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 90 events. 11/90 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 129 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 53. Up to 4 conditions per place. [2023-08-26 13:23:15,918 INFO L119 LiptonReduction]: Number of co-enabled transitions 1476 [2023-08-26 13:23:18,288 INFO L134 LiptonReduction]: Checked pairs total: 1468 [2023-08-26 13:23:18,289 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-26 13:23:18,298 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 13:23:18,302 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;@1d2156ad, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 13:23:18,302 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-26 13:23:18,303 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 13:23:18,303 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 13:23:18,303 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:23:18,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:18,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 13:23:18,304 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:23:18,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:18,307 INFO L85 PathProgramCache]: Analyzing trace with hash 421, now seen corresponding path program 1 times [2023-08-26 13:23:18,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:18,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181524163] [2023-08-26 13:23:18,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:18,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:18,367 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 13:23:18,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:18,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181524163] [2023-08-26 13:23:18,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181524163] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:23:18,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:23:18,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 13:23:18,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881391249] [2023-08-26 13:23:18,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:23:18,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 13:23:18,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:18,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 13:23:18,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 13:23:18,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 198 [2023-08-26 13:23:18,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 54 flow. Second operand has 2 states, 2 states have (on average 91.5) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:18,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:18,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 198 [2023-08-26 13:23:18,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:18,423 INFO L124 PetriNetUnfolderBase]: 45/80 cut-off events. [2023-08-26 13:23:18,423 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 13:23:18,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 80 events. 45/80 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 156 event pairs, 21 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 124. Up to 81 conditions per place. [2023-08-26 13:23:18,424 INFO L140 encePairwiseOnDemand]: 196/198 looper letters, 19 selfloop transitions, 0 changer transitions 0/19 dead transitions. [2023-08-26 13:23:18,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 19 transitions, 88 flow [2023-08-26 13:23:18,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 13:23:18,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 13:23:18,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 203 transitions. [2023-08-26 13:23:18,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5126262626262627 [2023-08-26 13:23:18,433 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 203 transitions. [2023-08-26 13:23:18,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 203 transitions. [2023-08-26 13:23:18,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:18,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 203 transitions. [2023-08-26 13:23:18,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 101.5) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:18,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:18,442 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:18,443 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 54 flow. Second operand 2 states and 203 transitions. [2023-08-26 13:23:18,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 19 transitions, 88 flow [2023-08-26 13:23:18,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 19 transitions, 80 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 13:23:18,455 INFO L231 Difference]: Finished difference. Result has 21 places, 19 transitions, 42 flow [2023-08-26 13:23:18,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=42, PETRI_PLACES=21, PETRI_TRANSITIONS=19} [2023-08-26 13:23:18,460 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -5 predicate places. [2023-08-26 13:23:18,460 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 19 transitions, 42 flow [2023-08-26 13:23:18,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 91.5) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:18,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:18,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:23:18,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 13:23:18,461 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:23:18,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:18,467 INFO L85 PathProgramCache]: Analyzing trace with hash 413044, now seen corresponding path program 1 times [2023-08-26 13:23:18,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:18,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261991455] [2023-08-26 13:23:18,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:18,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:18,586 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 13:23:18,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:18,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261991455] [2023-08-26 13:23:18,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261991455] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:23:18,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:23:18,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:23:18,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269299628] [2023-08-26 13:23:18,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:23:18,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:23:18,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:18,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:23:18,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:23:18,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 198 [2023-08-26 13:23:18,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:18,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:18,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 198 [2023-08-26 13:23:18,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:18,617 INFO L124 PetriNetUnfolderBase]: 41/72 cut-off events. [2023-08-26 13:23:18,617 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 13:23:18,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 72 events. 41/72 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 134 event pairs, 19 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 147. Up to 72 conditions per place. [2023-08-26 13:23:18,617 INFO L140 encePairwiseOnDemand]: 195/198 looper letters, 16 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-26 13:23:18,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 17 transitions, 72 flow [2023-08-26 13:23:18,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:23:18,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:23:18,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 241 transitions. [2023-08-26 13:23:18,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057239057239057 [2023-08-26 13:23:18,619 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 241 transitions. [2023-08-26 13:23:18,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 241 transitions. [2023-08-26 13:23:18,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:18,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 241 transitions. [2023-08-26 13:23:18,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:18,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:18,622 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:18,622 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 42 flow. Second operand 3 states and 241 transitions. [2023-08-26 13:23:18,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 17 transitions, 72 flow [2023-08-26 13:23:18,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 17 transitions, 72 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 13:23:18,622 INFO L231 Difference]: Finished difference. Result has 21 places, 17 transitions, 40 flow [2023-08-26 13:23:18,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=21, PETRI_TRANSITIONS=17} [2023-08-26 13:23:18,623 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -5 predicate places. [2023-08-26 13:23:18,623 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 17 transitions, 40 flow [2023-08-26 13:23:18,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:18,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:18,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:23:18,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 13:23:18,624 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:23:18,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:18,624 INFO L85 PathProgramCache]: Analyzing trace with hash 413045, now seen corresponding path program 1 times [2023-08-26 13:23:18,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:18,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928851815] [2023-08-26 13:23:18,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:18,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:18,656 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 13:23:18,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:18,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928851815] [2023-08-26 13:23:18,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928851815] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:23:18,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:23:18,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:23:18,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73072661] [2023-08-26 13:23:18,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:23:18,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:23:18,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:18,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:23:18,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:23:18,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 198 [2023-08-26 13:23:18,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:18,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:18,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 198 [2023-08-26 13:23:18,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:18,679 INFO L124 PetriNetUnfolderBase]: 37/64 cut-off events. [2023-08-26 13:23:18,679 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 13:23:18,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 64 events. 37/64 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 111 event pairs, 17 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 132. Up to 64 conditions per place. [2023-08-26 13:23:18,679 INFO L140 encePairwiseOnDemand]: 195/198 looper letters, 14 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-26 13:23:18,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 15 transitions, 66 flow [2023-08-26 13:23:18,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:23:18,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:23:18,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2023-08-26 13:23:18,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39225589225589225 [2023-08-26 13:23:18,681 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2023-08-26 13:23:18,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2023-08-26 13:23:18,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:18,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2023-08-26 13:23:18,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:18,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:18,684 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:18,684 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 40 flow. Second operand 3 states and 233 transitions. [2023-08-26 13:23:18,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 15 transitions, 66 flow [2023-08-26 13:23:18,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 15 transitions, 65 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:23:18,684 INFO L231 Difference]: Finished difference. Result has 20 places, 15 transitions, 37 flow [2023-08-26 13:23:18,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=35, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=37, PETRI_PLACES=20, PETRI_TRANSITIONS=15} [2023-08-26 13:23:18,687 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -6 predicate places. [2023-08-26 13:23:18,687 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 15 transitions, 37 flow [2023-08-26 13:23:18,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:18,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:18,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:23:18,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 13:23:18,687 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:23:18,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:18,688 INFO L85 PathProgramCache]: Analyzing trace with hash 396943662, now seen corresponding path program 1 times [2023-08-26 13:23:18,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:18,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112569366] [2023-08-26 13:23:18,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:18,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:18,763 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 13:23:18,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:18,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112569366] [2023-08-26 13:23:18,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112569366] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:23:18,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:23:18,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 13:23:18,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257687863] [2023-08-26 13:23:18,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:23:18,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 13:23:18,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:18,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 13:23:18,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 13:23:18,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 198 [2023-08-26 13:23:18,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 37 flow. Second operand has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:18,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:18,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 198 [2023-08-26 13:23:18,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:18,799 INFO L124 PetriNetUnfolderBase]: 29/52 cut-off events. [2023-08-26 13:23:18,799 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 13:23:18,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 52 events. 29/52 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 77 event pairs, 13 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 109. Up to 52 conditions per place. [2023-08-26 13:23:18,800 INFO L140 encePairwiseOnDemand]: 196/198 looper letters, 13 selfloop transitions, 1 changer transitions 0/14 dead transitions. [2023-08-26 13:23:18,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 14 transitions, 63 flow [2023-08-26 13:23:18,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:23:18,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:23:18,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2023-08-26 13:23:18,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37373737373737376 [2023-08-26 13:23:18,805 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2023-08-26 13:23:18,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2023-08-26 13:23:18,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:18,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2023-08-26 13:23:18,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:18,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:18,809 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:18,809 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 37 flow. Second operand 3 states and 222 transitions. [2023-08-26 13:23:18,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 14 transitions, 63 flow [2023-08-26 13:23:18,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 14 transitions, 62 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:23:18,810 INFO L231 Difference]: Finished difference. Result has 20 places, 14 transitions, 36 flow [2023-08-26 13:23:18,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=36, PETRI_PLACES=20, PETRI_TRANSITIONS=14} [2023-08-26 13:23:18,811 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -6 predicate places. [2023-08-26 13:23:18,811 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 14 transitions, 36 flow [2023-08-26 13:23:18,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:18,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:18,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:23:18,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 13:23:18,812 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:23:18,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:18,812 INFO L85 PathProgramCache]: Analyzing trace with hash 396943663, now seen corresponding path program 1 times [2023-08-26 13:23:18,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:18,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782813762] [2023-08-26 13:23:18,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:18,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:18,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:18,928 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 13:23:18,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:18,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782813762] [2023-08-26 13:23:18,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782813762] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:23:18,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:23:18,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 13:23:18,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161053496] [2023-08-26 13:23:18,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:23:18,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 13:23:18,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:18,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 13:23:18,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 13:23:18,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 198 [2023-08-26 13:23:18,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 14 transitions, 36 flow. Second operand has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:18,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:18,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 198 [2023-08-26 13:23:18,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:18,956 INFO L124 PetriNetUnfolderBase]: 21/40 cut-off events. [2023-08-26 13:23:18,956 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 13:23:18,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 40 events. 21/40 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 45 event pairs, 9 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 86. Up to 40 conditions per place. [2023-08-26 13:23:18,962 INFO L140 encePairwiseOnDemand]: 196/198 looper letters, 12 selfloop transitions, 1 changer transitions 0/13 dead transitions. [2023-08-26 13:23:18,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 13 transitions, 60 flow [2023-08-26 13:23:18,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:23:18,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:23:18,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2023-08-26 13:23:18,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3771043771043771 [2023-08-26 13:23:18,963 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 224 transitions. [2023-08-26 13:23:18,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 224 transitions. [2023-08-26 13:23:18,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:18,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 224 transitions. [2023-08-26 13:23:18,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:18,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:18,966 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:18,966 INFO L175 Difference]: Start difference. First operand has 20 places, 14 transitions, 36 flow. Second operand 3 states and 224 transitions. [2023-08-26 13:23:18,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 13 transitions, 60 flow [2023-08-26 13:23:18,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 13 transitions, 59 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:23:18,966 INFO L231 Difference]: Finished difference. Result has 20 places, 13 transitions, 35 flow [2023-08-26 13:23:18,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=35, PETRI_PLACES=20, PETRI_TRANSITIONS=13} [2023-08-26 13:23:18,968 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -6 predicate places. [2023-08-26 13:23:18,968 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 13 transitions, 35 flow [2023-08-26 13:23:18,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:18,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:18,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:18,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 13:23:18,969 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:23:18,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:18,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1644074393, now seen corresponding path program 1 times [2023-08-26 13:23:18,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:18,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855153685] [2023-08-26 13:23:18,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:18,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:18,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:19,039 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 13:23:19,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:19,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855153685] [2023-08-26 13:23:19,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855153685] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:23:19,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:23:19,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 13:23:19,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813250299] [2023-08-26 13:23:19,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:23:19,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:23:19,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:19,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:23:19,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:23:19,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 198 [2023-08-26 13:23:19,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 13 transitions, 35 flow. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:19,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:19,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 198 [2023-08-26 13:23:19,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:19,091 INFO L124 PetriNetUnfolderBase]: 29/54 cut-off events. [2023-08-26 13:23:19,091 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:23:19,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 54 events. 29/54 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 94 event pairs, 1 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 116. Up to 45 conditions per place. [2023-08-26 13:23:19,092 INFO L140 encePairwiseOnDemand]: 195/198 looper letters, 17 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2023-08-26 13:23:19,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 19 transitions, 86 flow [2023-08-26 13:23:19,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:23:19,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:23:19,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2023-08-26 13:23:19,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.468013468013468 [2023-08-26 13:23:19,102 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2023-08-26 13:23:19,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2023-08-26 13:23:19,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:19,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2023-08-26 13:23:19,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:19,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:19,104 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:19,104 INFO L175 Difference]: Start difference. First operand has 20 places, 13 transitions, 35 flow. Second operand 3 states and 278 transitions. [2023-08-26 13:23:19,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 19 transitions, 86 flow [2023-08-26 13:23:19,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 19 transitions, 85 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:23:19,105 INFO L231 Difference]: Finished difference. Result has 22 places, 14 transitions, 46 flow [2023-08-26 13:23:19,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=22, PETRI_TRANSITIONS=14} [2023-08-26 13:23:19,105 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -4 predicate places. [2023-08-26 13:23:19,106 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 14 transitions, 46 flow [2023-08-26 13:23:19,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:19,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:19,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:19,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 13:23:19,106 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:23:19,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:19,106 INFO L85 PathProgramCache]: Analyzing trace with hash 2111598268, now seen corresponding path program 1 times [2023-08-26 13:23:19,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:19,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232766148] [2023-08-26 13:23:19,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:19,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:19,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:23:19,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:19,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232766148] [2023-08-26 13:23:19,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232766148] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:23:19,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:23:19,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 13:23:19,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342736141] [2023-08-26 13:23:19,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:23:19,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:23:19,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:19,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:23:19,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:23:19,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 198 [2023-08-26 13:23:19,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 14 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:19,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:19,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 198 [2023-08-26 13:23:19,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:19,193 INFO L124 PetriNetUnfolderBase]: 40/73 cut-off events. [2023-08-26 13:23:19,193 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-26 13:23:19,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 73 events. 40/73 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 133 event pairs, 6 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 187. Up to 49 conditions per place. [2023-08-26 13:23:19,194 INFO L140 encePairwiseOnDemand]: 195/198 looper letters, 19 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-08-26 13:23:19,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 21 transitions, 110 flow [2023-08-26 13:23:19,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:23:19,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:23:19,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2023-08-26 13:23:19,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.468013468013468 [2023-08-26 13:23:19,195 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2023-08-26 13:23:19,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2023-08-26 13:23:19,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:19,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2023-08-26 13:23:19,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:19,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:19,198 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:19,198 INFO L175 Difference]: Start difference. First operand has 22 places, 14 transitions, 46 flow. Second operand 3 states and 278 transitions. [2023-08-26 13:23:19,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 21 transitions, 110 flow [2023-08-26 13:23:19,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 107 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:23:19,202 INFO L231 Difference]: Finished difference. Result has 24 places, 15 transitions, 56 flow [2023-08-26 13:23:19,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=24, PETRI_TRANSITIONS=15} [2023-08-26 13:23:19,202 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -2 predicate places. [2023-08-26 13:23:19,202 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 15 transitions, 56 flow [2023-08-26 13:23:19,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:19,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:19,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:19,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 13:23:19,204 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:23:19,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:19,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1376920364, now seen corresponding path program 1 times [2023-08-26 13:23:19,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:19,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147147901] [2023-08-26 13:23:19,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:19,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:19,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:23:19,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:19,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147147901] [2023-08-26 13:23:19,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147147901] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:23:19,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331754951] [2023-08-26 13:23:19,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:19,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:23:19,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:23:19,364 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 13:23:19,404 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 13:23:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:19,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 13:23:19,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:23:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:19,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:23:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:19,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331754951] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:23:19,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:23:19,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 9 [2023-08-26 13:23:19,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378191821] [2023-08-26 13:23:19,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:23:19,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 13:23:19,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:19,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 13:23:19,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-08-26 13:23:19,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 198 [2023-08-26 13:23:19,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 15 transitions, 56 flow. Second operand has 10 states, 10 states have (on average 70.5) internal successors, (705), 10 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:19,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:19,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 198 [2023-08-26 13:23:19,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:19,866 INFO L124 PetriNetUnfolderBase]: 75/134 cut-off events. [2023-08-26 13:23:19,867 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2023-08-26 13:23:19,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 134 events. 75/134 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 331 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 381. Up to 53 conditions per place. [2023-08-26 13:23:19,868 INFO L140 encePairwiseOnDemand]: 193/198 looper letters, 44 selfloop transitions, 23 changer transitions 0/67 dead transitions. [2023-08-26 13:23:19,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 67 transitions, 353 flow [2023-08-26 13:23:19,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-26 13:23:19,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-26 13:23:19,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1080 transitions. [2023-08-26 13:23:19,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2023-08-26 13:23:19,871 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1080 transitions. [2023-08-26 13:23:19,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1080 transitions. [2023-08-26 13:23:19,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:19,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1080 transitions. [2023-08-26 13:23:19,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 72.0) internal successors, (1080), 15 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:19,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 198.0) internal successors, (3168), 16 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:19,876 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 198.0) internal successors, (3168), 16 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:19,876 INFO L175 Difference]: Start difference. First operand has 24 places, 15 transitions, 56 flow. Second operand 15 states and 1080 transitions. [2023-08-26 13:23:19,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 67 transitions, 353 flow [2023-08-26 13:23:19,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 67 transitions, 349 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:23:19,878 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 235 flow [2023-08-26 13:23:19,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=235, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-08-26 13:23:19,878 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 17 predicate places. [2023-08-26 13:23:19,878 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 235 flow [2023-08-26 13:23:19,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 70.5) internal successors, (705), 10 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:19,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:19,879 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:19,884 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 13:23:20,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:23:20,086 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:23:20,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:20,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1410832779, now seen corresponding path program 2 times [2023-08-26 13:23:20,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:20,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651475702] [2023-08-26 13:23:20,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:20,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:23:20,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:20,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651475702] [2023-08-26 13:23:20,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651475702] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:23:20,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345504008] [2023-08-26 13:23:20,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:23:20,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:23:20,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:23:20,586 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 13:23:20,601 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 13:23:20,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:23:20,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:23:20,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 13:23:20,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:23:20,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:20,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:23:21,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:21,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345504008] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:23:21,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:23:21,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-08-26 13:23:21,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839333104] [2023-08-26 13:23:21,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:23:21,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-26 13:23:21,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:21,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-26 13:23:21,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-08-26 13:23:21,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 198 [2023-08-26 13:23:21,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 235 flow. Second operand has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:21,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:21,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 198 [2023-08-26 13:23:21,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:22,223 INFO L124 PetriNetUnfolderBase]: 268/495 cut-off events. [2023-08-26 13:23:22,223 INFO L125 PetriNetUnfolderBase]: For 1171/1171 co-relation queries the response was YES. [2023-08-26 13:23:22,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2136 conditions, 495 events. 268/495 cut-off events. For 1171/1171 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2125 event pairs, 2 based on Foata normal form. 8/467 useless extension candidates. Maximal degree in co-relation 2125. Up to 187 conditions per place. [2023-08-26 13:23:22,226 INFO L140 encePairwiseOnDemand]: 192/198 looper letters, 85 selfloop transitions, 92 changer transitions 40/217 dead transitions. [2023-08-26 13:23:22,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 217 transitions, 1722 flow [2023-08-26 13:23:22,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-26 13:23:22,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-26 13:23:22,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2069 transitions. [2023-08-26 13:23:22,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3483164983164983 [2023-08-26 13:23:22,231 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2069 transitions. [2023-08-26 13:23:22,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2069 transitions. [2023-08-26 13:23:22,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:22,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2069 transitions. [2023-08-26 13:23:22,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 68.96666666666667) internal successors, (2069), 30 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:22,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 198.0) internal successors, (6138), 31 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:22,241 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 198.0) internal successors, (6138), 31 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:22,241 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 235 flow. Second operand 30 states and 2069 transitions. [2023-08-26 13:23:22,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 217 transitions, 1722 flow [2023-08-26 13:23:22,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 217 transitions, 1512 flow, removed 95 selfloop flow, removed 3 redundant places. [2023-08-26 13:23:22,248 INFO L231 Difference]: Finished difference. Result has 75 places, 112 transitions, 995 flow [2023-08-26 13:23:22,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=995, PETRI_PLACES=75, PETRI_TRANSITIONS=112} [2023-08-26 13:23:22,249 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 49 predicate places. [2023-08-26 13:23:22,249 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 112 transitions, 995 flow [2023-08-26 13:23:22,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:22,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:22,249 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:22,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-26 13:23:22,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-08-26 13:23:22,454 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:23:22,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:22,454 INFO L85 PathProgramCache]: Analyzing trace with hash -252928693, now seen corresponding path program 3 times [2023-08-26 13:23:22,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:22,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016799443] [2023-08-26 13:23:22,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:22,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:22,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:22,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:22,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:22,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016799443] [2023-08-26 13:23:22,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016799443] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:23:22,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325028577] [2023-08-26 13:23:22,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 13:23:22,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:23:22,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:23:22,877 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 13:23:22,891 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 13:23:22,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 13:23:22,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:23:22,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 13:23:22,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:23:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:23,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:23:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:23,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325028577] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:23:23,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:23:23,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-08-26 13:23:23,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320689498] [2023-08-26 13:23:23,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:23:23,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-26 13:23:23,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:23,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-26 13:23:23,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-08-26 13:23:23,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 198 [2023-08-26 13:23:23,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 112 transitions, 995 flow. Second operand has 17 states, 17 states have (on average 65.17647058823529) internal successors, (1108), 17 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:23,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:23,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 198 [2023-08-26 13:23:23,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:25,742 INFO L124 PetriNetUnfolderBase]: 968/1630 cut-off events. [2023-08-26 13:23:25,743 INFO L125 PetriNetUnfolderBase]: For 4190/4190 co-relation queries the response was YES. [2023-08-26 13:23:25,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7704 conditions, 1630 events. 968/1630 cut-off events. For 4190/4190 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 8341 event pairs, 6 based on Foata normal form. 27/1545 useless extension candidates. Maximal degree in co-relation 7687. Up to 487 conditions per place. [2023-08-26 13:23:25,752 INFO L140 encePairwiseOnDemand]: 192/198 looper letters, 164 selfloop transitions, 354 changer transitions 60/578 dead transitions. [2023-08-26 13:23:25,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 578 transitions, 5995 flow [2023-08-26 13:23:25,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-26 13:23:25,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-26 13:23:25,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3097 transitions. [2023-08-26 13:23:25,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34758698092031426 [2023-08-26 13:23:25,759 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3097 transitions. [2023-08-26 13:23:25,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3097 transitions. [2023-08-26 13:23:25,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:25,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3097 transitions. [2023-08-26 13:23:25,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 68.82222222222222) internal successors, (3097), 45 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:25,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 198.0) internal successors, (9108), 46 states have internal predecessors, (9108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:25,773 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 198.0) internal successors, (9108), 46 states have internal predecessors, (9108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:25,773 INFO L175 Difference]: Start difference. First operand has 75 places, 112 transitions, 995 flow. Second operand 45 states and 3097 transitions. [2023-08-26 13:23:25,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 578 transitions, 5995 flow [2023-08-26 13:23:25,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 578 transitions, 4312 flow, removed 831 selfloop flow, removed 7 redundant places. [2023-08-26 13:23:25,806 INFO L231 Difference]: Finished difference. Result has 125 places, 427 transitions, 3691 flow [2023-08-26 13:23:25,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=3691, PETRI_PLACES=125, PETRI_TRANSITIONS=427} [2023-08-26 13:23:25,807 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 99 predicate places. [2023-08-26 13:23:25,807 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 427 transitions, 3691 flow [2023-08-26 13:23:25,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.17647058823529) internal successors, (1108), 17 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:25,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:25,807 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:25,812 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 13:23:26,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:23:26,012 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:23:26,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:26,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1714856237, now seen corresponding path program 4 times [2023-08-26 13:23:26,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:26,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526021009] [2023-08-26 13:23:26,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:26,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:26,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:26,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:26,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526021009] [2023-08-26 13:23:26,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526021009] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:23:26,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402869156] [2023-08-26 13:23:26,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 13:23:26,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:23:26,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:23:26,382 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 13:23:26,412 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 13:23:26,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 13:23:26,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:23:26,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 13:23:26,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:23:26,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:26,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:23:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:26,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402869156] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:23:26,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:23:26,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-08-26 13:23:26,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229578084] [2023-08-26 13:23:26,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:23:26,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-26 13:23:26,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:26,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-26 13:23:26,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2023-08-26 13:23:26,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 198 [2023-08-26 13:23:26,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 427 transitions, 3691 flow. Second operand has 17 states, 17 states have (on average 64.82352941176471) internal successors, (1102), 17 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:26,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:26,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 198 [2023-08-26 13:23:26,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:27,755 INFO L124 PetriNetUnfolderBase]: 1132/1852 cut-off events. [2023-08-26 13:23:27,756 INFO L125 PetriNetUnfolderBase]: For 2633/2633 co-relation queries the response was YES. [2023-08-26 13:23:27,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8733 conditions, 1852 events. 1132/1852 cut-off events. For 2633/2633 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9201 event pairs, 50 based on Foata normal form. 15/1765 useless extension candidates. Maximal degree in co-relation 8703. Up to 785 conditions per place. [2023-08-26 13:23:27,770 INFO L140 encePairwiseOnDemand]: 192/198 looper letters, 239 selfloop transitions, 404 changer transitions 18/661 dead transitions. [2023-08-26 13:23:27,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 661 transitions, 6788 flow [2023-08-26 13:23:27,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 13:23:27,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-26 13:23:27,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1498 transitions. [2023-08-26 13:23:27,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34389348025711663 [2023-08-26 13:23:27,773 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1498 transitions. [2023-08-26 13:23:27,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1498 transitions. [2023-08-26 13:23:27,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:27,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1498 transitions. [2023-08-26 13:23:27,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 68.0909090909091) internal successors, (1498), 22 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:27,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 198.0) internal successors, (4554), 23 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:27,785 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 198.0) internal successors, (4554), 23 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:27,785 INFO L175 Difference]: Start difference. First operand has 125 places, 427 transitions, 3691 flow. Second operand 22 states and 1498 transitions. [2023-08-26 13:23:27,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 661 transitions, 6788 flow [2023-08-26 13:23:27,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 661 transitions, 6129 flow, removed 328 selfloop flow, removed 4 redundant places. [2023-08-26 13:23:27,836 INFO L231 Difference]: Finished difference. Result has 149 places, 597 transitions, 5935 flow [2023-08-26 13:23:27,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=3251, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5935, PETRI_PLACES=149, PETRI_TRANSITIONS=597} [2023-08-26 13:23:27,837 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 123 predicate places. [2023-08-26 13:23:27,837 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 597 transitions, 5935 flow [2023-08-26 13:23:27,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 64.82352941176471) internal successors, (1102), 17 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:27,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:27,837 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:27,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-26 13:23:28,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:23:28,043 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:23:28,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:28,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1516804811, now seen corresponding path program 5 times [2023-08-26 13:23:28,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:28,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394197615] [2023-08-26 13:23:28,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:28,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:28,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:28,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:28,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:28,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394197615] [2023-08-26 13:23:28,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394197615] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:23:28,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562815996] [2023-08-26 13:23:28,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 13:23:28,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:23:28,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:23:28,589 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 13:23:28,591 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 13:23:28,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 13:23:28,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:23:28,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 13:23:28,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:23:28,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:28,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:23:29,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:29,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562815996] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:23:29,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:23:29,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-08-26 13:23:29,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830858277] [2023-08-26 13:23:29,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:23:29,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 13:23:29,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:29,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 13:23:29,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-08-26 13:23:29,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 198 [2023-08-26 13:23:29,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 597 transitions, 5935 flow. Second operand has 19 states, 19 states have (on average 64.94736842105263) internal successors, (1234), 19 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:29,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:29,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 198 [2023-08-26 13:23:29,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:32,462 INFO L124 PetriNetUnfolderBase]: 1826/3002 cut-off events. [2023-08-26 13:23:32,463 INFO L125 PetriNetUnfolderBase]: For 6480/6480 co-relation queries the response was YES. [2023-08-26 13:23:32,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15497 conditions, 3002 events. 1826/3002 cut-off events. For 6480/6480 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 17111 event pairs, 30 based on Foata normal form. 34/2960 useless extension candidates. Maximal degree in co-relation 15460. Up to 733 conditions per place. [2023-08-26 13:23:32,490 INFO L140 encePairwiseOnDemand]: 192/198 looper letters, 184 selfloop transitions, 656 changer transitions 257/1097 dead transitions. [2023-08-26 13:23:32,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 1097 transitions, 12403 flow [2023-08-26 13:23:32,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-26 13:23:32,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-26 13:23:32,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2774 transitions. [2023-08-26 13:23:32,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34170978073417096 [2023-08-26 13:23:32,495 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2774 transitions. [2023-08-26 13:23:32,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2774 transitions. [2023-08-26 13:23:32,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:32,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2774 transitions. [2023-08-26 13:23:32,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 67.65853658536585) internal successors, (2774), 41 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:32,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 198.0) internal successors, (8316), 42 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:32,506 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 198.0) internal successors, (8316), 42 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:32,506 INFO L175 Difference]: Start difference. First operand has 149 places, 597 transitions, 5935 flow. Second operand 41 states and 2774 transitions. [2023-08-26 13:23:32,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 1097 transitions, 12403 flow [2023-08-26 13:23:32,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 1097 transitions, 12119 flow, removed 106 selfloop flow, removed 7 redundant places. [2023-08-26 13:23:32,633 INFO L231 Difference]: Finished difference. Result has 199 places, 763 transitions, 9562 flow [2023-08-26 13:23:32,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=5707, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=9562, PETRI_PLACES=199, PETRI_TRANSITIONS=763} [2023-08-26 13:23:32,635 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 173 predicate places. [2023-08-26 13:23:32,635 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 763 transitions, 9562 flow [2023-08-26 13:23:32,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.94736842105263) internal successors, (1234), 19 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:32,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:32,635 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:32,642 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 13:23:32,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-26 13:23:32,841 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:23:32,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:32,841 INFO L85 PathProgramCache]: Analyzing trace with hash -335700746, now seen corresponding path program 6 times [2023-08-26 13:23:32,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:32,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238532416] [2023-08-26 13:23:32,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:32,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:23:33,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:33,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238532416] [2023-08-26 13:23:33,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238532416] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:23:33,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062293619] [2023-08-26 13:23:33,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 13:23:33,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:23:33,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:23:33,068 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 13:23:33,105 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 13:23:33,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-26 13:23:33,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:23:33,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 13:23:33,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:23:33,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:33,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:23:33,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:23:33,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062293619] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:23:33,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:23:33,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 17 [2023-08-26 13:23:33,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978808246] [2023-08-26 13:23:33,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:23:33,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 13:23:33,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:33,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 13:23:33,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-08-26 13:23:33,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 198 [2023-08-26 13:23:33,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 763 transitions, 9562 flow. Second operand has 18 states, 18 states have (on average 69.11111111111111) internal successors, (1244), 18 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:33,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:33,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 198 [2023-08-26 13:23:33,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:34,120 INFO L124 PetriNetUnfolderBase]: 1163/1970 cut-off events. [2023-08-26 13:23:34,121 INFO L125 PetriNetUnfolderBase]: For 7146/7146 co-relation queries the response was YES. [2023-08-26 13:23:34,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12064 conditions, 1970 events. 1163/1970 cut-off events. For 7146/7146 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 10687 event pairs, 24 based on Foata normal form. 168/2138 useless extension candidates. Maximal degree in co-relation 12011. Up to 441 conditions per place. [2023-08-26 13:23:34,135 INFO L140 encePairwiseOnDemand]: 193/198 looper letters, 279 selfloop transitions, 390 changer transitions 9/678 dead transitions. [2023-08-26 13:23:34,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 678 transitions, 9445 flow [2023-08-26 13:23:34,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 13:23:34,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 13:23:34,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 996 transitions. [2023-08-26 13:23:34,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3593073593073593 [2023-08-26 13:23:34,137 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 996 transitions. [2023-08-26 13:23:34,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 996 transitions. [2023-08-26 13:23:34,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:34,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 996 transitions. [2023-08-26 13:23:34,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 71.14285714285714) internal successors, (996), 14 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:34,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 198.0) internal successors, (2970), 15 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:34,141 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 198.0) internal successors, (2970), 15 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:34,141 INFO L175 Difference]: Start difference. First operand has 199 places, 763 transitions, 9562 flow. Second operand 14 states and 996 transitions. [2023-08-26 13:23:34,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 678 transitions, 9445 flow [2023-08-26 13:23:34,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 678 transitions, 8809 flow, removed 148 selfloop flow, removed 25 redundant places. [2023-08-26 13:23:34,226 INFO L231 Difference]: Finished difference. Result has 177 places, 650 transitions, 8166 flow [2023-08-26 13:23:34,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=7312, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=385, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8166, PETRI_PLACES=177, PETRI_TRANSITIONS=650} [2023-08-26 13:23:34,227 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 151 predicate places. [2023-08-26 13:23:34,227 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 650 transitions, 8166 flow [2023-08-26 13:23:34,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 69.11111111111111) internal successors, (1244), 18 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:34,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:34,237 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:34,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-26 13:23:34,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:23:34,442 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:23:34,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:34,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1809637067, now seen corresponding path program 7 times [2023-08-26 13:23:34,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:34,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869177455] [2023-08-26 13:23:34,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:34,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:34,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:23:34,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:34,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869177455] [2023-08-26 13:23:34,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869177455] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:23:34,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307211770] [2023-08-26 13:23:34,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 13:23:34,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:23:34,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:23:34,734 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 13:23:34,735 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 13:23:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:34,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 13:23:34,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:23:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:23:34,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:23:35,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:23:35,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307211770] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:23:35,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:23:35,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2023-08-26 13:23:35,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395615796] [2023-08-26 13:23:35,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:23:35,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 13:23:35,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:35,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 13:23:35,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-08-26 13:23:35,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 198 [2023-08-26 13:23:35,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 650 transitions, 8166 flow. Second operand has 15 states, 15 states have (on average 69.6) internal successors, (1044), 15 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:35,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:35,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 198 [2023-08-26 13:23:35,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:35,435 INFO L124 PetriNetUnfolderBase]: 868/1481 cut-off events. [2023-08-26 13:23:35,436 INFO L125 PetriNetUnfolderBase]: For 5825/5825 co-relation queries the response was YES. [2023-08-26 13:23:35,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8476 conditions, 1481 events. 868/1481 cut-off events. For 5825/5825 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 7637 event pairs, 14 based on Foata normal form. 172/1653 useless extension candidates. Maximal degree in co-relation 8439. Up to 449 conditions per place. [2023-08-26 13:23:35,446 INFO L140 encePairwiseOnDemand]: 193/198 looper letters, 187 selfloop transitions, 261 changer transitions 40/488 dead transitions. [2023-08-26 13:23:35,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 488 transitions, 6572 flow [2023-08-26 13:23:35,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 13:23:35,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 13:23:35,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 711 transitions. [2023-08-26 13:23:35,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35909090909090907 [2023-08-26 13:23:35,447 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 711 transitions. [2023-08-26 13:23:35,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 711 transitions. [2023-08-26 13:23:35,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:35,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 711 transitions. [2023-08-26 13:23:35,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 71.1) internal successors, (711), 10 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:35,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 198.0) internal successors, (2178), 11 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:35,450 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 198.0) internal successors, (2178), 11 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:35,450 INFO L175 Difference]: Start difference. First operand has 177 places, 650 transitions, 8166 flow. Second operand 10 states and 711 transitions. [2023-08-26 13:23:35,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 488 transitions, 6572 flow [2023-08-26 13:23:35,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 488 transitions, 5354 flow, removed 59 selfloop flow, removed 23 redundant places. [2023-08-26 13:23:35,500 INFO L231 Difference]: Finished difference. Result has 156 places, 437 transitions, 4476 flow [2023-08-26 13:23:35,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=4271, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4476, PETRI_PLACES=156, PETRI_TRANSITIONS=437} [2023-08-26 13:23:35,501 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 130 predicate places. [2023-08-26 13:23:35,501 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 437 transitions, 4476 flow [2023-08-26 13:23:35,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 69.6) internal successors, (1044), 15 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:35,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:35,501 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:35,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-26 13:23:35,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:23:35,706 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:23:35,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:35,706 INFO L85 PathProgramCache]: Analyzing trace with hash 702172175, now seen corresponding path program 8 times [2023-08-26 13:23:35,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:35,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087144699] [2023-08-26 13:23:35,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:35,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:35,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:36,356 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:36,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:36,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087144699] [2023-08-26 13:23:36,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087144699] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:23:36,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947009021] [2023-08-26 13:23:36,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:23:36,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:23:36,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:23:36,378 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:23:36,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-26 13:23:36,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:23:36,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:23:36,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-26 13:23:36,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:23:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:36,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:23:37,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:37,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947009021] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:23:37,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:23:37,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2023-08-26 13:23:37,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383767975] [2023-08-26 13:23:37,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:23:37,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-26 13:23:37,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:37,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-26 13:23:37,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2023-08-26 13:23:37,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 198 [2023-08-26 13:23:37,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 437 transitions, 4476 flow. Second operand has 25 states, 25 states have (on average 64.88) internal successors, (1622), 25 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:37,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:37,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 198 [2023-08-26 13:23:37,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:38,612 INFO L124 PetriNetUnfolderBase]: 1015/1723 cut-off events. [2023-08-26 13:23:38,612 INFO L125 PetriNetUnfolderBase]: For 3380/3380 co-relation queries the response was YES. [2023-08-26 13:23:38,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9120 conditions, 1723 events. 1015/1723 cut-off events. For 3380/3380 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 9125 event pairs, 10 based on Foata normal form. 8/1729 useless extension candidates. Maximal degree in co-relation 9096. Up to 499 conditions per place. [2023-08-26 13:23:38,618 INFO L140 encePairwiseOnDemand]: 192/198 looper letters, 0 selfloop transitions, 0 changer transitions 610/610 dead transitions. [2023-08-26 13:23:38,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 610 transitions, 7193 flow [2023-08-26 13:23:38,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-26 13:23:38,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-26 13:23:38,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1546 transitions. [2023-08-26 13:23:38,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.339481774264383 [2023-08-26 13:23:38,621 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1546 transitions. [2023-08-26 13:23:38,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1546 transitions. [2023-08-26 13:23:38,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:38,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1546 transitions. [2023-08-26 13:23:38,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 67.21739130434783) internal successors, (1546), 23 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:38,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 198.0) internal successors, (4752), 24 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:38,627 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 198.0) internal successors, (4752), 24 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:38,627 INFO L175 Difference]: Start difference. First operand has 156 places, 437 transitions, 4476 flow. Second operand 23 states and 1546 transitions. [2023-08-26 13:23:38,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 610 transitions, 7193 flow [2023-08-26 13:23:38,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 610 transitions, 6620 flow, removed 13 selfloop flow, removed 12 redundant places. [2023-08-26 13:23:38,667 INFO L231 Difference]: Finished difference. Result has 160 places, 0 transitions, 0 flow [2023-08-26 13:23:38,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=4022, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=0, PETRI_PLACES=160, PETRI_TRANSITIONS=0} [2023-08-26 13:23:38,667 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 134 predicate places. [2023-08-26 13:23:38,667 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 0 transitions, 0 flow [2023-08-26 13:23:38,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 64.88) internal successors, (1622), 25 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:38,669 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 11 remaining) [2023-08-26 13:23:38,670 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2023-08-26 13:23:38,670 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-08-26 13:23:38,670 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-08-26 13:23:38,670 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-08-26 13:23:38,670 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2023-08-26 13:23:38,670 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2023-08-26 13:23:38,670 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 11 remaining) [2023-08-26 13:23:38,670 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONASSERT (2 of 11 remaining) [2023-08-26 13:23:38,670 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 11 remaining) [2023-08-26 13:23:38,670 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 11 remaining) [2023-08-26 13:23:38,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-26 13:23:38,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-26 13:23:38,874 INFO L445 BasicCegarLoop]: Path program histogram: [8, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:38,877 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 13:23:38,877 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 13:23:38,879 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 01:23:38 BasicIcfg [2023-08-26 13:23:38,879 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 13:23:38,880 INFO L158 Benchmark]: Toolchain (without parser) took 23847.02ms. Allocated memory was 346.0MB in the beginning and 868.2MB in the end (delta: 522.2MB). Free memory was 321.9MB in the beginning and 635.4MB in the end (delta: -313.5MB). Peak memory consumption was 209.4MB. Max. memory is 16.0GB. [2023-08-26 13:23:38,880 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 346.0MB. Free memory is still 321.9MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 13:23:38,880 INFO L158 Benchmark]: CACSL2BoogieTranslator took 209.07ms. Allocated memory is still 346.0MB. Free memory was 321.9MB in the beginning and 311.2MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-26 13:23:38,880 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.69ms. Allocated memory is still 346.0MB. Free memory was 311.2MB in the beginning and 309.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 13:23:38,880 INFO L158 Benchmark]: Boogie Preprocessor took 27.42ms. Allocated memory is still 346.0MB. Free memory was 309.5MB in the beginning and 308.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 13:23:38,880 INFO L158 Benchmark]: RCFGBuilder took 397.46ms. Allocated memory is still 346.0MB. Free memory was 308.0MB in the beginning and 292.8MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 13:23:38,881 INFO L158 Benchmark]: TraceAbstraction took 23174.10ms. Allocated memory was 346.0MB in the beginning and 868.2MB in the end (delta: 522.2MB). Free memory was 292.3MB in the beginning and 635.4MB in the end (delta: -343.2MB). Peak memory consumption was 180.0MB. Max. memory is 16.0GB. [2023-08-26 13:23:38,881 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 346.0MB. Free memory is still 321.9MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 209.07ms. Allocated memory is still 346.0MB. Free memory was 321.9MB in the beginning and 311.2MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 33.69ms. Allocated memory is still 346.0MB. Free memory was 311.2MB in the beginning and 309.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 27.42ms. Allocated memory is still 346.0MB. Free memory was 309.5MB in the beginning and 308.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 397.46ms. Allocated memory is still 346.0MB. Free memory was 308.0MB in the beginning and 292.8MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 23174.10ms. Allocated memory was 346.0MB in the beginning and 868.2MB in the end (delta: 522.2MB). Free memory was 292.3MB in the beginning and 635.4MB in the end (delta: -343.2MB). Peak memory consumption was 180.0MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.4s, 86 PlacesBefore, 26 PlacesAfterwards, 90 TransitionsBefore, 21 TransitionsAfterwards, 1476 CoEnabledTransitionPairs, 5 FixpointIterations, 37 TrivialSequentialCompositions, 42 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 6 ConcurrentYvCompositions, 9 ChoiceCompositions, 97 TotalNumberOfCompositions, 1468 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1397, independent: 1390, independent conditional: 0, independent unconditional: 1390, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 758, independent: 754, independent conditional: 0, independent unconditional: 754, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1397, independent: 636, independent conditional: 0, independent unconditional: 636, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 758, unknown conditional: 0, unknown unconditional: 758] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 21, Positive conditional cache size: 0, Positive unconditional cache size: 21, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - 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: -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: 21]: 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, 121 locations, 11 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 23.1s, OverallIterations: 15, TraceHistogramMax: 4, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 10.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1104 SdHoareTripleChecker+Valid, 2.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1104 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 1.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 380 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2999 IncrementalHoareTripleChecker+Invalid, 3379 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 380 mSolverCounterUnsat, 0 mSDtfsCounter, 2999 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 436 GetRequests, 142 SyntacticMatches, 12 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3003 ImplicationChecksByTransitivity, 7.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9562occurred in iteration=12, InterpolantAutomatonStates: 220, 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, 0.4s SatisfiabilityAnalysisTime, 7.1s InterpolantComputationTime, 284 NumberOfCodeBlocks, 284 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 375 ConstructedInterpolants, 0 QuantifiedInterpolants, 4559 SizeOfPredicates, 52 NumberOfNonLiveVariables, 1010 ConjunctsInSsa, 127 ConjunctsInUnsatCore, 31 InterpolantComputations, 7 PerfectInterpolantSequences, 16/172 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 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 13:23:38,900 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...