/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/pthread-wmm/rfi000_tso.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 12:08:27,198 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 12:08:27,282 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 12:08:27,286 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 12:08:27,287 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 12:08:27,314 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 12:08:27,314 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 12:08:27,315 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 12:08:27,315 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 12:08:27,319 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 12:08:27,319 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 12:08:27,319 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 12:08:27,319 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 12:08:27,321 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 12:08:27,321 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 12:08:27,321 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 12:08:27,321 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 12:08:27,322 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 12:08:27,322 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 12:08:27,322 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 12:08:27,322 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 12:08:27,323 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 12:08:27,323 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 12:08:27,324 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 12:08:27,324 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 12:08:27,324 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 12:08:27,325 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 12:08:27,325 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:08:27,325 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 12:08:27,325 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 12:08:27,326 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 12:08:27,326 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 12:08:27,327 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 12:08:27,327 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 12:08:27,327 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 12:08:27,327 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 12:08:27,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 12:08:27,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 12:08:27,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 12:08:27,668 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 12:08:27,668 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 12:08:27,670 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi000_tso.i [2023-08-26 12:08:28,862 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 12:08:29,175 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 12:08:29,175 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi000_tso.i [2023-08-26 12:08:29,198 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e3170a97/8dc812329990434491f168e6b271233b/FLAG9f34376e1 [2023-08-26 12:08:29,210 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e3170a97/8dc812329990434491f168e6b271233b [2023-08-26 12:08:29,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 12:08:29,213 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 12:08:29,214 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 12:08:29,214 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 12:08:29,220 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 12:08:29,221 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:08:29" (1/1) ... [2023-08-26 12:08:29,222 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@524636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:08:29, skipping insertion in model container [2023-08-26 12:08:29,222 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:08:29" (1/1) ... [2023-08-26 12:08:29,283 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 12:08:29,687 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:08:29,703 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 12:08:29,730 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 12:08:29,731 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 12:08:29,789 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:08:29,832 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 12:08:29,832 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 12:08:29,838 INFO L206 MainTranslator]: Completed translation [2023-08-26 12:08:29,839 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:08:29 WrapperNode [2023-08-26 12:08:29,839 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 12:08:29,840 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 12:08:29,840 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 12:08:29,840 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 12:08:29,846 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:08:29" (1/1) ... [2023-08-26 12:08:29,874 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:08:29" (1/1) ... [2023-08-26 12:08:29,912 INFO L138 Inliner]: procedures = 175, calls = 46, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 176 [2023-08-26 12:08:29,913 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 12:08:29,914 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 12:08:29,914 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 12:08:29,914 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 12:08:29,921 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:08:29" (1/1) ... [2023-08-26 12:08:29,922 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:08:29" (1/1) ... [2023-08-26 12:08:29,940 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:08:29" (1/1) ... [2023-08-26 12:08:29,940 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:08:29" (1/1) ... [2023-08-26 12:08:29,948 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:08:29" (1/1) ... [2023-08-26 12:08:29,950 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:08:29" (1/1) ... [2023-08-26 12:08:29,951 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:08:29" (1/1) ... [2023-08-26 12:08:29,953 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:08:29" (1/1) ... [2023-08-26 12:08:29,956 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 12:08:29,957 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 12:08:29,957 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 12:08:29,957 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 12:08:29,957 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:08:29" (1/1) ... [2023-08-26 12:08:29,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:08:29,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:08:29,998 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 12:08:30,026 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 12:08:30,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 12:08:30,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 12:08:30,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 12:08:30,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 12:08:30,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 12:08:30,046 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 12:08:30,046 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 12:08:30,046 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 12:08:30,046 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 12:08:30,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 12:08:30,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 12:08:30,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 12:08:30,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 12:08:30,048 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 12:08:30,207 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 12:08:30,210 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 12:08:30,614 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 12:08:30,769 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 12:08:30,769 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 12:08:30,771 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:08:30 BoogieIcfgContainer [2023-08-26 12:08:30,771 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 12:08:30,773 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 12:08:30,773 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 12:08:30,776 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 12:08:30,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:08:29" (1/3) ... [2023-08-26 12:08:30,777 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c01531d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:08:30, skipping insertion in model container [2023-08-26 12:08:30,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:08:29" (2/3) ... [2023-08-26 12:08:30,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c01531d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:08:30, skipping insertion in model container [2023-08-26 12:08:30,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:08:30" (3/3) ... [2023-08-26 12:08:30,779 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi000_tso.i [2023-08-26 12:08:30,795 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 12:08:30,795 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-26 12:08:30,795 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 12:08:30,842 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 12:08:30,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 98 transitions, 206 flow [2023-08-26 12:08:30,935 INFO L124 PetriNetUnfolderBase]: 3/96 cut-off events. [2023-08-26 12:08:30,936 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:08:30,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 96 events. 3/96 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 59. Up to 2 conditions per place. [2023-08-26 12:08:30,942 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 98 transitions, 206 flow [2023-08-26 12:08:30,946 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 96 transitions, 198 flow [2023-08-26 12:08:30,950 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:08:30,962 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 96 transitions, 198 flow [2023-08-26 12:08:30,966 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 96 transitions, 198 flow [2023-08-26 12:08:30,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 96 transitions, 198 flow [2023-08-26 12:08:31,000 INFO L124 PetriNetUnfolderBase]: 3/96 cut-off events. [2023-08-26 12:08:31,000 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:08:31,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 96 events. 3/96 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 59. Up to 2 conditions per place. [2023-08-26 12:08:31,003 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2023-08-26 12:08:34,586 INFO L134 LiptonReduction]: Checked pairs total: 4706 [2023-08-26 12:08:34,587 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-08-26 12:08:34,599 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:08:34,604 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;@25231d49, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:08:34,605 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-26 12:08:34,606 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:08:34,606 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 12:08:34,606 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:08:34,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:08:34,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 12:08:34,607 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:08:34,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:08:34,612 INFO L85 PathProgramCache]: Analyzing trace with hash 532, now seen corresponding path program 1 times [2023-08-26 12:08:34,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:08:34,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534640449] [2023-08-26 12:08:34,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:08:34,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:08:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:08:34,715 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 12:08:34,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:08:34,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534640449] [2023-08-26 12:08:34,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534640449] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:08:34,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:08:34,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 12:08:34,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135982429] [2023-08-26 12:08:34,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:08:34,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 12:08:34,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:08:34,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 12:08:34,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 12:08:34,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 196 [2023-08-26 12:08:34,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 58 flow. Second operand has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:34,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:08:34,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 196 [2023-08-26 12:08:34,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:08:34,902 INFO L124 PetriNetUnfolderBase]: 339/574 cut-off events. [2023-08-26 12:08:34,902 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 12:08:34,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1160 conditions, 574 events. 339/574 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2321 event pairs, 339 based on Foata normal form. 32/513 useless extension candidates. Maximal degree in co-relation 1150. Up to 573 conditions per place. [2023-08-26 12:08:34,909 INFO L140 encePairwiseOnDemand]: 191/196 looper letters, 20 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-08-26 12:08:34,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 21 transitions, 88 flow [2023-08-26 12:08:34,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 12:08:34,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 12:08:34,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 193 transitions. [2023-08-26 12:08:34,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4923469387755102 [2023-08-26 12:08:34,922 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 193 transitions. [2023-08-26 12:08:34,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 193 transitions. [2023-08-26 12:08:34,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:08:34,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 193 transitions. [2023-08-26 12:08:34,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 96.5) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:34,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:34,933 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:34,934 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 58 flow. Second operand 2 states and 193 transitions. [2023-08-26 12:08:34,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 21 transitions, 88 flow [2023-08-26 12:08:34,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 21 transitions, 86 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:08:34,938 INFO L231 Difference]: Finished difference. Result has 27 places, 21 transitions, 46 flow [2023-08-26 12:08:34,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=27, PETRI_TRANSITIONS=21} [2023-08-26 12:08:34,943 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2023-08-26 12:08:34,944 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 21 transitions, 46 flow [2023-08-26 12:08:34,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:34,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:08:34,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 12:08:34,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 12:08:34,945 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P1Err0ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:08:34,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:08:34,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1618706194, now seen corresponding path program 1 times [2023-08-26 12:08:34,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:08:34,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537880539] [2023-08-26 12:08:34,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:08:34,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:08:35,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:08:35,272 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 12:08:35,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:08:35,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537880539] [2023-08-26 12:08:35,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537880539] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:08:35,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:08:35,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:08:35,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212905622] [2023-08-26 12:08:35,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:08:35,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:08:35,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:08:35,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:08:35,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:08:35,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 196 [2023-08-26 12:08:35,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:35,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:08:35,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 196 [2023-08-26 12:08:35,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:08:35,397 INFO L124 PetriNetUnfolderBase]: 294/501 cut-off events. [2023-08-26 12:08:35,397 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:08:35,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1013 conditions, 501 events. 294/501 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2020 event pairs, 69 based on Foata normal form. 0/444 useless extension candidates. Maximal degree in co-relation 1010. Up to 366 conditions per place. [2023-08-26 12:08:35,403 INFO L140 encePairwiseOnDemand]: 193/196 looper letters, 22 selfloop transitions, 2 changer transitions 4/29 dead transitions. [2023-08-26 12:08:35,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 29 transitions, 118 flow [2023-08-26 12:08:35,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:08:35,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:08:35,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2023-08-26 12:08:35,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2023-08-26 12:08:35,410 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2023-08-26 12:08:35,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2023-08-26 12:08:35,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:08:35,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2023-08-26 12:08:35,413 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 12:08:35,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:35,416 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:35,416 INFO L175 Difference]: Start difference. First operand has 27 places, 21 transitions, 46 flow. Second operand 3 states and 278 transitions. [2023-08-26 12:08:35,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 29 transitions, 118 flow [2023-08-26 12:08:35,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 29 transitions, 118 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:08:35,418 INFO L231 Difference]: Finished difference. Result has 28 places, 18 transitions, 44 flow [2023-08-26 12:08:35,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=28, PETRI_TRANSITIONS=18} [2023-08-26 12:08:35,419 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -4 predicate places. [2023-08-26 12:08:35,421 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 18 transitions, 44 flow [2023-08-26 12:08:35,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:35,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:08:35,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:08:35,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 12:08:35,423 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:08:35,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:08:35,430 INFO L85 PathProgramCache]: Analyzing trace with hash -796937670, now seen corresponding path program 1 times [2023-08-26 12:08:35,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:08:35,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673772185] [2023-08-26 12:08:35,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:08:35,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:08:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:08:36,239 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 12:08:36,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:08:36,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673772185] [2023-08-26 12:08:36,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673772185] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:08:36,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:08:36,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:08:36,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903312105] [2023-08-26 12:08:36,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:08:36,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:08:36,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:08:36,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:08:36,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:08:36,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 196 [2023-08-26 12:08:36,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 18 transitions, 44 flow. Second operand has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:36,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:08:36,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 196 [2023-08-26 12:08:36,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:08:36,600 INFO L124 PetriNetUnfolderBase]: 259/458 cut-off events. [2023-08-26 12:08:36,600 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-26 12:08:36,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 953 conditions, 458 events. 259/458 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1699 event pairs, 102 based on Foata normal form. 38/496 useless extension candidates. Maximal degree in co-relation 949. Up to 194 conditions per place. [2023-08-26 12:08:36,602 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 24 selfloop transitions, 6 changer transitions 19/49 dead transitions. [2023-08-26 12:08:36,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 49 transitions, 206 flow [2023-08-26 12:08:36,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 12:08:36,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 12:08:36,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 535 transitions. [2023-08-26 12:08:36,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38994169096209913 [2023-08-26 12:08:36,605 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 535 transitions. [2023-08-26 12:08:36,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 535 transitions. [2023-08-26 12:08:36,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:08:36,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 535 transitions. [2023-08-26 12:08:36,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 76.42857142857143) internal successors, (535), 7 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:36,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 196.0) internal successors, (1568), 8 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:36,610 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 196.0) internal successors, (1568), 8 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:36,610 INFO L175 Difference]: Start difference. First operand has 28 places, 18 transitions, 44 flow. Second operand 7 states and 535 transitions. [2023-08-26 12:08:36,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 49 transitions, 206 flow [2023-08-26 12:08:36,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 49 transitions, 200 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:08:36,612 INFO L231 Difference]: Finished difference. Result has 36 places, 22 transitions, 96 flow [2023-08-26 12:08:36,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=96, PETRI_PLACES=36, PETRI_TRANSITIONS=22} [2023-08-26 12:08:36,613 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2023-08-26 12:08:36,613 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 22 transitions, 96 flow [2023-08-26 12:08:36,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.6) internal successors, (353), 5 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:36,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:08:36,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:08:36,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 12:08:36,614 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:08:36,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:08:36,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1581188777, now seen corresponding path program 1 times [2023-08-26 12:08:36,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:08:36,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329137376] [2023-08-26 12:08:36,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:08:36,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:08:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:08:37,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:08:37,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:08:37,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329137376] [2023-08-26 12:08:37,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329137376] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:08:37,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:08:37,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 12:08:37,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284601732] [2023-08-26 12:08:37,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:08:37,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:08:37,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:08:37,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:08:37,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:08:37,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 196 [2023-08-26 12:08:37,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 22 transitions, 96 flow. Second operand has 8 states, 8 states have (on average 76.5) internal successors, (612), 8 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:37,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:08:37,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 196 [2023-08-26 12:08:37,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:08:37,849 INFO L124 PetriNetUnfolderBase]: 181/341 cut-off events. [2023-08-26 12:08:37,849 INFO L125 PetriNetUnfolderBase]: For 326/335 co-relation queries the response was YES. [2023-08-26 12:08:37,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1020 conditions, 341 events. 181/341 cut-off events. For 326/335 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1243 event pairs, 60 based on Foata normal form. 23/361 useless extension candidates. Maximal degree in co-relation 1011. Up to 262 conditions per place. [2023-08-26 12:08:37,852 INFO L140 encePairwiseOnDemand]: 191/196 looper letters, 29 selfloop transitions, 4 changer transitions 10/45 dead transitions. [2023-08-26 12:08:37,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 45 transitions, 266 flow [2023-08-26 12:08:37,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:08:37,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:08:37,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 490 transitions. [2023-08-26 12:08:37,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-08-26 12:08:37,854 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 490 transitions. [2023-08-26 12:08:37,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 490 transitions. [2023-08-26 12:08:37,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:08:37,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 490 transitions. [2023-08-26 12:08:37,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.66666666666667) internal successors, (490), 6 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:37,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 196.0) internal successors, (1372), 7 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:37,859 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 196.0) internal successors, (1372), 7 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:37,859 INFO L175 Difference]: Start difference. First operand has 36 places, 22 transitions, 96 flow. Second operand 6 states and 490 transitions. [2023-08-26 12:08:37,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 45 transitions, 266 flow [2023-08-26 12:08:37,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 45 transitions, 259 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-26 12:08:37,864 INFO L231 Difference]: Finished difference. Result has 40 places, 24 transitions, 115 flow [2023-08-26 12:08:37,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=115, PETRI_PLACES=40, PETRI_TRANSITIONS=24} [2023-08-26 12:08:37,866 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 8 predicate places. [2023-08-26 12:08:37,866 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 24 transitions, 115 flow [2023-08-26 12:08:37,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 76.5) internal successors, (612), 8 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:37,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:08:37,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:08:37,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 12:08:37,867 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:08:37,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:08:37,867 INFO L85 PathProgramCache]: Analyzing trace with hash -713928700, now seen corresponding path program 1 times [2023-08-26 12:08:37,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:08:37,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041776454] [2023-08-26 12:08:37,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:08:37,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:08:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:08:38,088 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 12:08:38,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:08:38,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041776454] [2023-08-26 12:08:38,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041776454] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:08:38,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:08:38,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:08:38,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422336178] [2023-08-26 12:08:38,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:08:38,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:08:38,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:08:38,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:08:38,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:08:38,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 196 [2023-08-26 12:08:38,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 24 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:38,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:08:38,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 196 [2023-08-26 12:08:38,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:08:38,171 INFO L124 PetriNetUnfolderBase]: 59/139 cut-off events. [2023-08-26 12:08:38,171 INFO L125 PetriNetUnfolderBase]: For 106/109 co-relation queries the response was YES. [2023-08-26 12:08:38,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 461 conditions, 139 events. 59/139 cut-off events. For 106/109 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 419 event pairs, 14 based on Foata normal form. 23/160 useless extension candidates. Maximal degree in co-relation 448. Up to 90 conditions per place. [2023-08-26 12:08:38,172 INFO L140 encePairwiseOnDemand]: 192/196 looper letters, 31 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2023-08-26 12:08:38,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 229 flow [2023-08-26 12:08:38,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:08:38,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:08:38,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2023-08-26 12:08:38,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4574829931972789 [2023-08-26 12:08:38,174 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2023-08-26 12:08:38,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2023-08-26 12:08:38,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:08:38,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2023-08-26 12:08:38,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:38,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:38,176 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:38,176 INFO L175 Difference]: Start difference. First operand has 40 places, 24 transitions, 115 flow. Second operand 3 states and 269 transitions. [2023-08-26 12:08:38,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 229 flow [2023-08-26 12:08:38,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 36 transitions, 219 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-26 12:08:38,179 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 125 flow [2023-08-26 12:08:38,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2023-08-26 12:08:38,180 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 5 predicate places. [2023-08-26 12:08:38,180 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 125 flow [2023-08-26 12:08:38,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:38,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:08:38,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:08:38,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 12:08:38,181 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:08:38,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:08:38,181 INFO L85 PathProgramCache]: Analyzing trace with hash -644700905, now seen corresponding path program 1 times [2023-08-26 12:08:38,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:08:38,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028240702] [2023-08-26 12:08:38,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:08:38,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:08:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:08:39,211 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 12:08:39,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:08:39,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028240702] [2023-08-26 12:08:39,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028240702] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:08:39,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:08:39,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 12:08:39,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646219630] [2023-08-26 12:08:39,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:08:39,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 12:08:39,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:08:39,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 12:08:39,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-08-26 12:08:39,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 196 [2023-08-26 12:08:39,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 125 flow. Second operand has 9 states, 9 states have (on average 73.66666666666667) internal successors, (663), 9 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:39,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:08:39,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 196 [2023-08-26 12:08:39,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:08:39,503 INFO L124 PetriNetUnfolderBase]: 89/222 cut-off events. [2023-08-26 12:08:39,503 INFO L125 PetriNetUnfolderBase]: For 166/171 co-relation queries the response was YES. [2023-08-26 12:08:39,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 222 events. 89/222 cut-off events. For 166/171 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 880 event pairs, 15 based on Foata normal form. 12/233 useless extension candidates. Maximal degree in co-relation 759. Up to 99 conditions per place. [2023-08-26 12:08:39,504 INFO L140 encePairwiseOnDemand]: 187/196 looper letters, 43 selfloop transitions, 19 changer transitions 8/72 dead transitions. [2023-08-26 12:08:39,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 72 transitions, 480 flow [2023-08-26 12:08:39,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 12:08:39,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 12:08:39,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 852 transitions. [2023-08-26 12:08:39,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39517625231910947 [2023-08-26 12:08:39,508 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 852 transitions. [2023-08-26 12:08:39,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 852 transitions. [2023-08-26 12:08:39,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:08:39,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 852 transitions. [2023-08-26 12:08:39,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 77.45454545454545) internal successors, (852), 11 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:39,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 196.0) internal successors, (2352), 12 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:39,513 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 196.0) internal successors, (2352), 12 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:39,514 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 125 flow. Second operand 11 states and 852 transitions. [2023-08-26 12:08:39,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 72 transitions, 480 flow [2023-08-26 12:08:39,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 72 transitions, 471 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:08:39,517 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 271 flow [2023-08-26 12:08:39,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=271, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2023-08-26 12:08:39,518 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 19 predicate places. [2023-08-26 12:08:39,518 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 271 flow [2023-08-26 12:08:39,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 73.66666666666667) internal successors, (663), 9 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:39,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:08:39,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:08:39,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 12:08:39,519 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:08:39,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:08:39,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1557181857, now seen corresponding path program 2 times [2023-08-26 12:08:39,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:08:39,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221799240] [2023-08-26 12:08:39,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:08:39,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:08:39,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:08:39,703 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 12:08:39,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:08:39,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221799240] [2023-08-26 12:08:39,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221799240] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:08:39,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:08:39,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:08:39,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974771419] [2023-08-26 12:08:39,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:08:39,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:08:39,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:08:39,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:08:39,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:08:39,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 196 [2023-08-26 12:08:39,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 271 flow. Second operand has 4 states, 4 states have (on average 83.75) internal successors, (335), 4 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:39,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:08:39,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 196 [2023-08-26 12:08:39,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:08:39,774 INFO L124 PetriNetUnfolderBase]: 38/108 cut-off events. [2023-08-26 12:08:39,774 INFO L125 PetriNetUnfolderBase]: For 180/182 co-relation queries the response was YES. [2023-08-26 12:08:39,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 108 events. 38/108 cut-off events. For 180/182 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 347 event pairs, 6 based on Foata normal form. 19/125 useless extension candidates. Maximal degree in co-relation 440. Up to 57 conditions per place. [2023-08-26 12:08:39,776 INFO L140 encePairwiseOnDemand]: 192/196 looper letters, 40 selfloop transitions, 5 changer transitions 8/55 dead transitions. [2023-08-26 12:08:39,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 55 transitions, 469 flow [2023-08-26 12:08:39,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:08:39,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:08:39,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 349 transitions. [2023-08-26 12:08:39,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451530612244898 [2023-08-26 12:08:39,777 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 349 transitions. [2023-08-26 12:08:39,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 349 transitions. [2023-08-26 12:08:39,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:08:39,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 349 transitions. [2023-08-26 12:08:39,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:39,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:39,780 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:39,780 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 271 flow. Second operand 4 states and 349 transitions. [2023-08-26 12:08:39,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 55 transitions, 469 flow [2023-08-26 12:08:39,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 55 transitions, 412 flow, removed 20 selfloop flow, removed 6 redundant places. [2023-08-26 12:08:39,783 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 229 flow [2023-08-26 12:08:39,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=229, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2023-08-26 12:08:39,784 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 15 predicate places. [2023-08-26 12:08:39,784 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 229 flow [2023-08-26 12:08:39,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.75) internal successors, (335), 4 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:39,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:08:39,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:08:39,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 12:08:39,785 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:08:39,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:08:39,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1808869231, now seen corresponding path program 1 times [2023-08-26 12:08:39,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:08:39,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237068868] [2023-08-26 12:08:39,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:08:39,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:08:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:08:39,959 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 12:08:39,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:08:39,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237068868] [2023-08-26 12:08:39,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237068868] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:08:39,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:08:39,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:08:39,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624416756] [2023-08-26 12:08:39,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:08:39,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:08:39,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:08:39,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:08:39,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:08:39,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 196 [2023-08-26 12:08:39,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 229 flow. Second operand has 4 states, 4 states have (on average 83.5) internal successors, (334), 4 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:39,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:08:39,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 196 [2023-08-26 12:08:39,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:08:40,053 INFO L124 PetriNetUnfolderBase]: 41/116 cut-off events. [2023-08-26 12:08:40,053 INFO L125 PetriNetUnfolderBase]: For 164/164 co-relation queries the response was YES. [2023-08-26 12:08:40,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 116 events. 41/116 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 363 event pairs, 5 based on Foata normal form. 1/117 useless extension candidates. Maximal degree in co-relation 461. Up to 59 conditions per place. [2023-08-26 12:08:40,054 INFO L140 encePairwiseOnDemand]: 192/196 looper letters, 26 selfloop transitions, 2 changer transitions 32/60 dead transitions. [2023-08-26 12:08:40,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 60 transitions, 463 flow [2023-08-26 12:08:40,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:08:40,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:08:40,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 348 transitions. [2023-08-26 12:08:40,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44387755102040816 [2023-08-26 12:08:40,056 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 348 transitions. [2023-08-26 12:08:40,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 348 transitions. [2023-08-26 12:08:40,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:08:40,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 348 transitions. [2023-08-26 12:08:40,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:40,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:40,059 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:40,059 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 229 flow. Second operand 4 states and 348 transitions. [2023-08-26 12:08:40,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 60 transitions, 463 flow [2023-08-26 12:08:40,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 60 transitions, 428 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-26 12:08:40,062 INFO L231 Difference]: Finished difference. Result has 48 places, 26 transitions, 132 flow [2023-08-26 12:08:40,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=48, PETRI_TRANSITIONS=26} [2023-08-26 12:08:40,062 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 16 predicate places. [2023-08-26 12:08:40,063 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 26 transitions, 132 flow [2023-08-26 12:08:40,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.5) internal successors, (334), 4 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:40,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:08:40,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:08:40,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 12:08:40,063 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:08:40,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:08:40,064 INFO L85 PathProgramCache]: Analyzing trace with hash -390984339, now seen corresponding path program 2 times [2023-08-26 12:08:40,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:08:40,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029618937] [2023-08-26 12:08:40,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:08:40,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:08:40,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:08:41,712 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 12:08:41,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:08:41,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029618937] [2023-08-26 12:08:41,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029618937] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:08:41,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:08:41,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-26 12:08:41,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506187350] [2023-08-26 12:08:41,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:08:41,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 12:08:41,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:08:41,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 12:08:41,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-08-26 12:08:41,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 196 [2023-08-26 12:08:41,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 26 transitions, 132 flow. Second operand has 11 states, 11 states have (on average 70.54545454545455) internal successors, (776), 11 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:41,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:08:41,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 196 [2023-08-26 12:08:41,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:08:42,089 INFO L124 PetriNetUnfolderBase]: 12/53 cut-off events. [2023-08-26 12:08:42,089 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-08-26 12:08:42,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 53 events. 12/53 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 97 event pairs, 0 based on Foata normal form. 1/54 useless extension candidates. Maximal degree in co-relation 190. Up to 17 conditions per place. [2023-08-26 12:08:42,090 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 17 selfloop transitions, 5 changer transitions 15/38 dead transitions. [2023-08-26 12:08:42,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 38 transitions, 262 flow [2023-08-26 12:08:42,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 12:08:42,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 12:08:42,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 583 transitions. [2023-08-26 12:08:42,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3718112244897959 [2023-08-26 12:08:42,093 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 583 transitions. [2023-08-26 12:08:42,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 583 transitions. [2023-08-26 12:08:42,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:08:42,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 583 transitions. [2023-08-26 12:08:42,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 72.875) internal successors, (583), 8 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:42,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 196.0) internal successors, (1764), 9 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:42,099 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 196.0) internal successors, (1764), 9 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:42,099 INFO L175 Difference]: Start difference. First operand has 48 places, 26 transitions, 132 flow. Second operand 8 states and 583 transitions. [2023-08-26 12:08:42,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 38 transitions, 262 flow [2023-08-26 12:08:42,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 38 transitions, 227 flow, removed 7 selfloop flow, removed 8 redundant places. [2023-08-26 12:08:42,101 INFO L231 Difference]: Finished difference. Result has 46 places, 20 transitions, 92 flow [2023-08-26 12:08:42,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=92, PETRI_PLACES=46, PETRI_TRANSITIONS=20} [2023-08-26 12:08:42,102 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 14 predicate places. [2023-08-26 12:08:42,102 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 20 transitions, 92 flow [2023-08-26 12:08:42,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 70.54545454545455) internal successors, (776), 11 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:42,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:08:42,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:08:42,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 12:08:42,103 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:08:42,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:08:42,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1653119859, now seen corresponding path program 3 times [2023-08-26 12:08:42,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:08:42,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872258430] [2023-08-26 12:08:42,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:08:42,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:08:42,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:08:43,184 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 12:08:43,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:08:43,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872258430] [2023-08-26 12:08:43,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872258430] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:08:43,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:08:43,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 12:08:43,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711172733] [2023-08-26 12:08:43,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:08:43,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 12:08:43,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:08:43,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 12:08:43,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-08-26 12:08:43,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 196 [2023-08-26 12:08:43,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 20 transitions, 92 flow. Second operand has 10 states, 10 states have (on average 72.7) internal successors, (727), 10 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:43,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:08:43,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 196 [2023-08-26 12:08:43,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:08:43,373 INFO L124 PetriNetUnfolderBase]: 6/30 cut-off events. [2023-08-26 12:08:43,373 INFO L125 PetriNetUnfolderBase]: For 24/25 co-relation queries the response was YES. [2023-08-26 12:08:43,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 30 events. 6/30 cut-off events. For 24/25 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 25 event pairs, 2 based on Foata normal form. 1/31 useless extension candidates. Maximal degree in co-relation 102. Up to 10 conditions per place. [2023-08-26 12:08:43,373 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2023-08-26 12:08:43,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 22 transitions, 148 flow [2023-08-26 12:08:43,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 12:08:43,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 12:08:43,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 659 transitions. [2023-08-26 12:08:43,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3735827664399093 [2023-08-26 12:08:43,376 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 659 transitions. [2023-08-26 12:08:43,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 659 transitions. [2023-08-26 12:08:43,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:08:43,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 659 transitions. [2023-08-26 12:08:43,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 73.22222222222223) internal successors, (659), 9 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:43,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 196.0) internal successors, (1960), 10 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:43,380 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 196.0) internal successors, (1960), 10 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:43,380 INFO L175 Difference]: Start difference. First operand has 46 places, 20 transitions, 92 flow. Second operand 9 states and 659 transitions. [2023-08-26 12:08:43,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 22 transitions, 148 flow [2023-08-26 12:08:43,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 22 transitions, 122 flow, removed 6 selfloop flow, removed 11 redundant places. [2023-08-26 12:08:43,382 INFO L231 Difference]: Finished difference. Result has 37 places, 0 transitions, 0 flow [2023-08-26 12:08:43,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, 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=9, PETRI_FLOW=0, PETRI_PLACES=37, PETRI_TRANSITIONS=0} [2023-08-26 12:08:43,383 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 5 predicate places. [2023-08-26 12:08:43,383 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 0 transitions, 0 flow [2023-08-26 12:08:43,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 72.7) internal successors, (727), 10 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:43,386 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P1Err0ASSERT_VIOLATIONASSERT (8 of 9 remaining) [2023-08-26 12:08:43,387 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2023-08-26 12:08:43,387 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-08-26 12:08:43,387 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-08-26 12:08:43,388 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2023-08-26 12:08:43,388 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (3 of 9 remaining) [2023-08-26 12:08:43,388 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 9 remaining) [2023-08-26 12:08:43,388 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 9 remaining) [2023-08-26 12:08:43,388 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P1Err0ASSERT_VIOLATIONASSERT (0 of 9 remaining) [2023-08-26 12:08:43,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 12:08:43,388 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1] [2023-08-26 12:08:43,392 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 12:08:43,393 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 12:08:43,398 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 12:08:43 BasicIcfg [2023-08-26 12:08:43,398 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 12:08:43,399 INFO L158 Benchmark]: Toolchain (without parser) took 14185.72ms. Allocated memory was 385.9MB in the beginning and 704.6MB in the end (delta: 318.8MB). Free memory was 359.8MB in the beginning and 384.0MB in the end (delta: -24.3MB). Peak memory consumption was 295.8MB. Max. memory is 16.0GB. [2023-08-26 12:08:43,399 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 385.9MB. Free memory is still 362.1MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 12:08:43,400 INFO L158 Benchmark]: CACSL2BoogieTranslator took 624.97ms. Allocated memory is still 385.9MB. Free memory was 359.8MB in the beginning and 334.6MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. [2023-08-26 12:08:43,400 INFO L158 Benchmark]: Boogie Procedure Inliner took 73.12ms. Allocated memory is still 385.9MB. Free memory was 334.6MB in the beginning and 331.4MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-26 12:08:43,400 INFO L158 Benchmark]: Boogie Preprocessor took 42.43ms. Allocated memory is still 385.9MB. Free memory was 331.4MB in the beginning and 329.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 12:08:43,400 INFO L158 Benchmark]: RCFGBuilder took 814.32ms. Allocated memory is still 385.9MB. Free memory was 329.3MB in the beginning and 328.5MB in the end (delta: 759.7kB). Peak memory consumption was 23.4MB. Max. memory is 16.0GB. [2023-08-26 12:08:43,401 INFO L158 Benchmark]: TraceAbstraction took 12625.44ms. Allocated memory was 385.9MB in the beginning and 704.6MB in the end (delta: 318.8MB). Free memory was 327.7MB in the beginning and 384.0MB in the end (delta: -56.4MB). Peak memory consumption was 262.0MB. Max. memory is 16.0GB. [2023-08-26 12:08:43,402 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 385.9MB. Free memory is still 362.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 624.97ms. Allocated memory is still 385.9MB. Free memory was 359.8MB in the beginning and 334.6MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 73.12ms. Allocated memory is still 385.9MB. Free memory was 334.6MB in the beginning and 331.4MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 42.43ms. Allocated memory is still 385.9MB. Free memory was 331.4MB in the beginning and 329.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 814.32ms. Allocated memory is still 385.9MB. Free memory was 329.3MB in the beginning and 328.5MB in the end (delta: 759.7kB). Peak memory consumption was 23.4MB. Max. memory is 16.0GB. * TraceAbstraction took 12625.44ms. Allocated memory was 385.9MB in the beginning and 704.6MB in the end (delta: 318.8MB). Free memory was 327.7MB in the beginning and 384.0MB in the end (delta: -56.4MB). Peak memory consumption was 262.0MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.6s, 100 PlacesBefore, 32 PlacesAfterwards, 96 TransitionsBefore, 26 TransitionsAfterwards, 1320 CoEnabledTransitionPairs, 7 FixpointIterations, 39 TrivialSequentialCompositions, 41 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 16 ConcurrentYvCompositions, 2 ChoiceCompositions, 98 TotalNumberOfCompositions, 4706 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1528, independent: 1338, independent conditional: 0, independent unconditional: 1338, dependent: 190, dependent conditional: 0, dependent unconditional: 190, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 729, independent: 707, independent conditional: 0, independent unconditional: 707, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1528, independent: 631, independent conditional: 0, independent unconditional: 631, dependent: 168, dependent conditional: 0, dependent unconditional: 168, unknown: 729, unknown conditional: 0, unknown unconditional: 729] , Statistics on independence cache: Total cache size (in pairs): 51, Positive cache size: 38, Positive conditional cache size: 0, Positive unconditional cache size: 38, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 17]: assertion always holds For all program executions holds that assertion always holds 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: 17]: 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, 117 locations, 9 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: 12.5s, OverallIterations: 10, TraceHistogramMax: 1, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 105 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 105 mSDsluCounter, 7 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4 mSDsCounter, 39 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 885 IncrementalHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 39 mSolverCounterUnsat, 3 mSDtfsCounter, 885 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=271occurred in iteration=6, InterpolantAutomatonStates: 57, 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: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 6.1s InterpolantComputationTime, 124 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 114 ConstructedInterpolants, 0 QuantifiedInterpolants, 1393 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 0/0 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 6 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 12:08:43,423 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...