/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-wmm/rfi000_tso.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 18:19:03,374 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 18:19:03,488 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 18:19:03,492 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 18:19:03,492 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 18:19:03,510 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 18:19:03,510 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 18:19:03,511 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 18:19:03,511 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 18:19:03,512 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 18:19:03,512 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 18:19:03,512 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 18:19:03,513 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 18:19:03,513 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 18:19:03,513 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 18:19:03,514 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 18:19:03,514 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 18:19:03,514 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 18:19:03,515 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 18:19:03,515 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 18:19:03,515 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 18:19:03,517 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 18:19:03,517 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 18:19:03,517 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 18:19:03,517 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 18:19:03,518 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 18:19:03,518 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 18:19:03,518 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:19:03,518 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 18:19:03,519 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 18:19:03,519 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 18:19:03,519 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 18:19:03,519 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 18:19:03,520 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 18:19:03,520 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 18:19:03,520 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 18:19:03,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 18:19:03,872 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 18:19:03,875 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 18:19:03,877 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 18:19:03,877 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 18:19:03,878 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi000_tso.i [2023-08-26 18:19:04,989 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 18:19:05,316 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 18:19:05,317 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi000_tso.i [2023-08-26 18:19:05,339 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba37ddcf3/f43bc944dde84417813a1f72d746c3e3/FLAGd699e8959 [2023-08-26 18:19:05,353 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba37ddcf3/f43bc944dde84417813a1f72d746c3e3 [2023-08-26 18:19:05,358 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 18:19:05,359 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 18:19:05,361 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 18:19:05,361 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 18:19:05,364 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 18:19:05,364 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:19:05" (1/1) ... [2023-08-26 18:19:05,365 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50011dfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:19:05, skipping insertion in model container [2023-08-26 18:19:05,365 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:19:05" (1/1) ... [2023-08-26 18:19:05,418 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 18:19:05,846 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:19:05,859 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 18:19:05,891 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 18:19:05,893 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 18:19:05,943 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:19:05,979 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 18:19:05,979 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 18:19:05,985 INFO L206 MainTranslator]: Completed translation [2023-08-26 18:19:05,987 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:19:05 WrapperNode [2023-08-26 18:19:05,987 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 18:19:05,988 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 18:19:05,988 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 18:19:05,988 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 18:19:05,994 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:19:05" (1/1) ... [2023-08-26 18:19:06,025 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:19:05" (1/1) ... [2023-08-26 18:19:06,062 INFO L138 Inliner]: procedures = 175, calls = 46, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 176 [2023-08-26 18:19:06,063 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 18:19:06,063 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 18:19:06,063 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 18:19:06,063 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 18:19:06,073 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:19:05" (1/1) ... [2023-08-26 18:19:06,074 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:19:05" (1/1) ... [2023-08-26 18:19:06,090 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:19:05" (1/1) ... [2023-08-26 18:19:06,091 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:19:05" (1/1) ... [2023-08-26 18:19:06,098 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:19:05" (1/1) ... [2023-08-26 18:19:06,099 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:19:05" (1/1) ... [2023-08-26 18:19:06,111 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:19:05" (1/1) ... [2023-08-26 18:19:06,113 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:19:05" (1/1) ... [2023-08-26 18:19:06,116 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 18:19:06,117 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 18:19:06,117 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 18:19:06,117 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 18:19:06,118 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:19:05" (1/1) ... [2023-08-26 18:19:06,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:19:06,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:19:06,158 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 18:19:06,175 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 18:19:06,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 18:19:06,201 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 18:19:06,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 18:19:06,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 18:19:06,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 18:19:06,201 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 18:19:06,201 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 18:19:06,201 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 18:19:06,201 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 18:19:06,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 18:19:06,202 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 18:19:06,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 18:19:06,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 18:19:06,203 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 18:19:06,312 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 18:19:06,314 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 18:19:06,615 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 18:19:06,818 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 18:19:06,818 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 18:19:06,820 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:19:06 BoogieIcfgContainer [2023-08-26 18:19:06,820 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 18:19:06,824 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 18:19:06,824 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 18:19:06,827 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 18:19:06,827 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:19:05" (1/3) ... [2023-08-26 18:19:06,828 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3160383e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:19:06, skipping insertion in model container [2023-08-26 18:19:06,829 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:19:05" (2/3) ... [2023-08-26 18:19:06,829 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3160383e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:19:06, skipping insertion in model container [2023-08-26 18:19:06,829 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:19:06" (3/3) ... [2023-08-26 18:19:06,830 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi000_tso.i [2023-08-26 18:19:06,849 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 18:19:06,849 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-26 18:19:06,849 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 18:19:06,897 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 18:19:06,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 98 transitions, 206 flow [2023-08-26 18:19:06,990 INFO L124 PetriNetUnfolderBase]: 3/96 cut-off events. [2023-08-26 18:19:06,991 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:19:06,996 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 18:19:06,996 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 98 transitions, 206 flow [2023-08-26 18:19:07,000 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 96 transitions, 198 flow [2023-08-26 18:19:07,003 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:19:07,015 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 96 transitions, 198 flow [2023-08-26 18:19:07,019 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 96 transitions, 198 flow [2023-08-26 18:19:07,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 96 transitions, 198 flow [2023-08-26 18:19:07,059 INFO L124 PetriNetUnfolderBase]: 3/96 cut-off events. [2023-08-26 18:19:07,059 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:19:07,059 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 18:19:07,061 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2023-08-26 18:19:10,673 INFO L134 LiptonReduction]: Checked pairs total: 4706 [2023-08-26 18:19:10,674 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-08-26 18:19:10,692 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:19:10,699 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;@45d712b5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:19:10,699 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-26 18:19:10,700 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:19:10,700 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 18:19:10,700 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:19:10,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:10,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 18:19:10,701 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 18:19:10,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:10,705 INFO L85 PathProgramCache]: Analyzing trace with hash 532, now seen corresponding path program 1 times [2023-08-26 18:19:10,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:10,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353748139] [2023-08-26 18:19:10,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:10,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:10,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:10,815 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 18:19:10,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:10,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353748139] [2023-08-26 18:19:10,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353748139] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:10,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:10,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 18:19:10,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181680508] [2023-08-26 18:19:10,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:10,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 18:19:10,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:10,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 18:19:10,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 18:19:10,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 196 [2023-08-26 18:19:10,856 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 18:19:10,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:10,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 196 [2023-08-26 18:19:10,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:11,033 INFO L124 PetriNetUnfolderBase]: 339/574 cut-off events. [2023-08-26 18:19:11,033 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 18:19:11,037 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 18:19:11,044 INFO L140 encePairwiseOnDemand]: 191/196 looper letters, 20 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-08-26 18:19:11,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 21 transitions, 88 flow [2023-08-26 18:19:11,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 18:19:11,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 18:19:11,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 193 transitions. [2023-08-26 18:19:11,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4923469387755102 [2023-08-26 18:19:11,059 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 193 transitions. [2023-08-26 18:19:11,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 193 transitions. [2023-08-26 18:19:11,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:11,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 193 transitions. [2023-08-26 18:19:11,070 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 18:19:11,076 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 18:19:11,077 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 18:19:11,079 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 58 flow. Second operand 2 states and 193 transitions. [2023-08-26 18:19:11,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 21 transitions, 88 flow [2023-08-26 18:19:11,081 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 18:19:11,082 INFO L231 Difference]: Finished difference. Result has 27 places, 21 transitions, 46 flow [2023-08-26 18:19:11,084 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 18:19:11,088 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2023-08-26 18:19:11,088 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 21 transitions, 46 flow [2023-08-26 18:19:11,089 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 18:19:11,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:11,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 18:19:11,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 18:19:11,090 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P1Err0ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 18:19:11,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:11,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1618706194, now seen corresponding path program 1 times [2023-08-26 18:19:11,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:11,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857741936] [2023-08-26 18:19:11,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:11,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:11,347 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 18:19:11,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:11,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857741936] [2023-08-26 18:19:11,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857741936] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:11,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:11,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:19:11,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628596291] [2023-08-26 18:19:11,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:11,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:19:11,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:11,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:19:11,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:19:11,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 196 [2023-08-26 18:19:11,353 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 18:19:11,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:11,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 196 [2023-08-26 18:19:11,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:11,468 INFO L124 PetriNetUnfolderBase]: 294/501 cut-off events. [2023-08-26 18:19:11,468 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:19:11,469 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 18:19:11,471 INFO L140 encePairwiseOnDemand]: 193/196 looper letters, 22 selfloop transitions, 2 changer transitions 4/29 dead transitions. [2023-08-26 18:19:11,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 29 transitions, 118 flow [2023-08-26 18:19:11,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:19:11,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:19:11,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2023-08-26 18:19:11,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2023-08-26 18:19:11,474 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2023-08-26 18:19:11,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2023-08-26 18:19:11,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:11,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2023-08-26 18:19:11,475 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 18:19:11,477 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 18:19:11,477 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 18:19:11,477 INFO L175 Difference]: Start difference. First operand has 27 places, 21 transitions, 46 flow. Second operand 3 states and 278 transitions. [2023-08-26 18:19:11,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 29 transitions, 118 flow [2023-08-26 18:19:11,478 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 18:19:11,478 INFO L231 Difference]: Finished difference. Result has 28 places, 18 transitions, 44 flow [2023-08-26 18:19:11,479 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 18:19:11,479 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -4 predicate places. [2023-08-26 18:19:11,480 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 18 transitions, 44 flow [2023-08-26 18:19:11,480 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 18:19:11,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:11,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:11,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 18:19:11,480 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 18:19:11,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:11,481 INFO L85 PathProgramCache]: Analyzing trace with hash -796937670, now seen corresponding path program 1 times [2023-08-26 18:19:11,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:11,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942476886] [2023-08-26 18:19:11,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:11,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:12,319 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 18:19:12,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:12,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942476886] [2023-08-26 18:19:12,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942476886] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:12,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:12,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:19:12,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626245497] [2023-08-26 18:19:12,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:12,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:19:12,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:12,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:19:12,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:19:12,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 196 [2023-08-26 18:19:12,323 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 18:19:12,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:12,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 196 [2023-08-26 18:19:12,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:12,640 INFO L124 PetriNetUnfolderBase]: 259/458 cut-off events. [2023-08-26 18:19:12,640 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-26 18:19:12,641 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 18:19:12,643 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 24 selfloop transitions, 6 changer transitions 19/49 dead transitions. [2023-08-26 18:19:12,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 49 transitions, 206 flow [2023-08-26 18:19:12,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 18:19:12,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 18:19:12,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 535 transitions. [2023-08-26 18:19:12,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38994169096209913 [2023-08-26 18:19:12,646 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 535 transitions. [2023-08-26 18:19:12,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 535 transitions. [2023-08-26 18:19:12,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:12,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 535 transitions. [2023-08-26 18:19:12,647 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 18:19:12,650 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 18:19:12,651 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 18:19:12,651 INFO L175 Difference]: Start difference. First operand has 28 places, 18 transitions, 44 flow. Second operand 7 states and 535 transitions. [2023-08-26 18:19:12,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 49 transitions, 206 flow [2023-08-26 18:19:12,652 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 18:19:12,653 INFO L231 Difference]: Finished difference. Result has 36 places, 22 transitions, 96 flow [2023-08-26 18:19:12,653 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 18:19:12,654 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2023-08-26 18:19:12,654 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 22 transitions, 96 flow [2023-08-26 18:19:12,654 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 18:19:12,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:12,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:12,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 18:19:12,655 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 18:19:12,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:12,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1581188777, now seen corresponding path program 1 times [2023-08-26 18:19:12,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:12,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452808542] [2023-08-26 18:19:12,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:12,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:13,521 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 18:19:13,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:13,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452808542] [2023-08-26 18:19:13,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452808542] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:13,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:13,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 18:19:13,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645425811] [2023-08-26 18:19:13,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:13,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 18:19:13,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:13,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 18:19:13,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-26 18:19:13,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 196 [2023-08-26 18:19:13,525 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 18:19:13,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:13,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 196 [2023-08-26 18:19:13,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:13,760 INFO L124 PetriNetUnfolderBase]: 181/341 cut-off events. [2023-08-26 18:19:13,760 INFO L125 PetriNetUnfolderBase]: For 326/335 co-relation queries the response was YES. [2023-08-26 18:19:13,761 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 18:19:13,763 INFO L140 encePairwiseOnDemand]: 191/196 looper letters, 29 selfloop transitions, 4 changer transitions 10/45 dead transitions. [2023-08-26 18:19:13,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 45 transitions, 266 flow [2023-08-26 18:19:13,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:19:13,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:19:13,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 490 transitions. [2023-08-26 18:19:13,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-08-26 18:19:13,766 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 490 transitions. [2023-08-26 18:19:13,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 490 transitions. [2023-08-26 18:19:13,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:13,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 490 transitions. [2023-08-26 18:19:13,768 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 18:19:13,770 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 18:19:13,770 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 18:19:13,771 INFO L175 Difference]: Start difference. First operand has 36 places, 22 transitions, 96 flow. Second operand 6 states and 490 transitions. [2023-08-26 18:19:13,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 45 transitions, 266 flow [2023-08-26 18:19:13,773 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 18:19:13,774 INFO L231 Difference]: Finished difference. Result has 40 places, 24 transitions, 115 flow [2023-08-26 18:19:13,775 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 18:19:13,775 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 8 predicate places. [2023-08-26 18:19:13,776 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 24 transitions, 115 flow [2023-08-26 18:19:13,776 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 18:19:13,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:13,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:13,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 18:19:13,777 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 18:19:13,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:13,777 INFO L85 PathProgramCache]: Analyzing trace with hash -713928700, now seen corresponding path program 1 times [2023-08-26 18:19:13,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:13,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196695141] [2023-08-26 18:19:13,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:13,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:13,951 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 18:19:13,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:13,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196695141] [2023-08-26 18:19:13,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196695141] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:13,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:13,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:19:13,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946941896] [2023-08-26 18:19:13,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:13,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:19:13,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:13,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:19:13,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:19:13,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 196 [2023-08-26 18:19:13,955 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 18:19:13,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:13,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 196 [2023-08-26 18:19:13,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:14,022 INFO L124 PetriNetUnfolderBase]: 59/139 cut-off events. [2023-08-26 18:19:14,022 INFO L125 PetriNetUnfolderBase]: For 106/109 co-relation queries the response was YES. [2023-08-26 18:19:14,023 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 18:19:14,023 INFO L140 encePairwiseOnDemand]: 192/196 looper letters, 31 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2023-08-26 18:19:14,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 229 flow [2023-08-26 18:19:14,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:19:14,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:19:14,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2023-08-26 18:19:14,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4574829931972789 [2023-08-26 18:19:14,025 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2023-08-26 18:19:14,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2023-08-26 18:19:14,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:14,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2023-08-26 18:19:14,026 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 18:19:14,027 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 18:19:14,027 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 18:19:14,027 INFO L175 Difference]: Start difference. First operand has 40 places, 24 transitions, 115 flow. Second operand 3 states and 269 transitions. [2023-08-26 18:19:14,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 229 flow [2023-08-26 18:19:14,029 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 18:19:14,030 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 125 flow [2023-08-26 18:19:14,030 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 18:19:14,030 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 5 predicate places. [2023-08-26 18:19:14,031 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 125 flow [2023-08-26 18:19:14,031 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 18:19:14,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:14,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:14,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 18:19:14,031 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 18:19:14,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:14,032 INFO L85 PathProgramCache]: Analyzing trace with hash -644700905, now seen corresponding path program 1 times [2023-08-26 18:19:14,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:14,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196461046] [2023-08-26 18:19:14,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:14,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:19:15,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:15,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196461046] [2023-08-26 18:19:15,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196461046] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:15,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:15,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 18:19:15,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290932851] [2023-08-26 18:19:15,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:15,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 18:19:15,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:15,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 18:19:15,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-08-26 18:19:15,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 196 [2023-08-26 18:19:15,140 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 18:19:15,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:15,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 196 [2023-08-26 18:19:15,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:15,415 INFO L124 PetriNetUnfolderBase]: 89/222 cut-off events. [2023-08-26 18:19:15,415 INFO L125 PetriNetUnfolderBase]: For 166/171 co-relation queries the response was YES. [2023-08-26 18:19:15,416 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 18:19:15,417 INFO L140 encePairwiseOnDemand]: 187/196 looper letters, 43 selfloop transitions, 19 changer transitions 8/72 dead transitions. [2023-08-26 18:19:15,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 72 transitions, 480 flow [2023-08-26 18:19:15,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 18:19:15,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 18:19:15,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 852 transitions. [2023-08-26 18:19:15,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39517625231910947 [2023-08-26 18:19:15,420 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 852 transitions. [2023-08-26 18:19:15,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 852 transitions. [2023-08-26 18:19:15,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:15,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 852 transitions. [2023-08-26 18:19:15,422 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 18:19:15,425 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 18:19:15,425 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 18:19:15,425 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 125 flow. Second operand 11 states and 852 transitions. [2023-08-26 18:19:15,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 72 transitions, 480 flow [2023-08-26 18:19:15,427 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 18:19:15,429 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 271 flow [2023-08-26 18:19:15,429 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 18:19:15,429 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 19 predicate places. [2023-08-26 18:19:15,429 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 271 flow [2023-08-26 18:19:15,430 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 18:19:15,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:15,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:15,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 18:19:15,430 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 18:19:15,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:15,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1557181857, now seen corresponding path program 2 times [2023-08-26 18:19:15,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:15,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94449581] [2023-08-26 18:19:15,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:15,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:15,626 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 18:19:15,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:15,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94449581] [2023-08-26 18:19:15,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94449581] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:15,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:15,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:19:15,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075072056] [2023-08-26 18:19:15,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:15,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:19:15,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:15,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:19:15,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:19:15,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 196 [2023-08-26 18:19:15,629 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 18:19:15,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:15,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 196 [2023-08-26 18:19:15,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:15,692 INFO L124 PetriNetUnfolderBase]: 38/108 cut-off events. [2023-08-26 18:19:15,692 INFO L125 PetriNetUnfolderBase]: For 180/182 co-relation queries the response was YES. [2023-08-26 18:19:15,693 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 18:19:15,694 INFO L140 encePairwiseOnDemand]: 192/196 looper letters, 40 selfloop transitions, 5 changer transitions 8/55 dead transitions. [2023-08-26 18:19:15,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 55 transitions, 469 flow [2023-08-26 18:19:15,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:19:15,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:19:15,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 349 transitions. [2023-08-26 18:19:15,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451530612244898 [2023-08-26 18:19:15,695 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 349 transitions. [2023-08-26 18:19:15,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 349 transitions. [2023-08-26 18:19:15,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:15,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 349 transitions. [2023-08-26 18:19:15,696 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 18:19:15,698 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 18:19:15,698 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 18:19:15,698 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 271 flow. Second operand 4 states and 349 transitions. [2023-08-26 18:19:15,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 55 transitions, 469 flow [2023-08-26 18:19:15,700 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 18:19:15,701 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 229 flow [2023-08-26 18:19:15,701 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 18:19:15,702 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 15 predicate places. [2023-08-26 18:19:15,702 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 229 flow [2023-08-26 18:19:15,702 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 18:19:15,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:15,702 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 18:19:15,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 18:19:15,703 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 18:19:15,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:15,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1808869231, now seen corresponding path program 1 times [2023-08-26 18:19:15,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:15,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514473294] [2023-08-26 18:19:15,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:15,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:15,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:15,876 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 18:19:15,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:15,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514473294] [2023-08-26 18:19:15,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514473294] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:15,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:15,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:19:15,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128778374] [2023-08-26 18:19:15,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:15,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:19:15,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:15,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:19:15,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:19:15,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 196 [2023-08-26 18:19:15,879 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 18:19:15,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:15,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 196 [2023-08-26 18:19:15,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:15,973 INFO L124 PetriNetUnfolderBase]: 41/116 cut-off events. [2023-08-26 18:19:15,974 INFO L125 PetriNetUnfolderBase]: For 164/164 co-relation queries the response was YES. [2023-08-26 18:19:15,974 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 18:19:15,975 INFO L140 encePairwiseOnDemand]: 192/196 looper letters, 26 selfloop transitions, 2 changer transitions 32/60 dead transitions. [2023-08-26 18:19:15,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 60 transitions, 463 flow [2023-08-26 18:19:15,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:19:15,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:19:15,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 348 transitions. [2023-08-26 18:19:15,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44387755102040816 [2023-08-26 18:19:15,976 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 348 transitions. [2023-08-26 18:19:15,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 348 transitions. [2023-08-26 18:19:15,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:15,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 348 transitions. [2023-08-26 18:19:15,977 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 18:19:15,978 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 18:19:15,979 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 18:19:15,979 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 229 flow. Second operand 4 states and 348 transitions. [2023-08-26 18:19:15,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 60 transitions, 463 flow [2023-08-26 18:19:15,981 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 18:19:15,981 INFO L231 Difference]: Finished difference. Result has 48 places, 26 transitions, 132 flow [2023-08-26 18:19:15,981 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 18:19:15,982 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 16 predicate places. [2023-08-26 18:19:15,982 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 26 transitions, 132 flow [2023-08-26 18:19:15,982 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 18:19:15,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:15,983 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 18:19:15,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 18:19:15,983 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 18:19:15,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:15,983 INFO L85 PathProgramCache]: Analyzing trace with hash -390984339, now seen corresponding path program 2 times [2023-08-26 18:19:15,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:15,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918735035] [2023-08-26 18:19:15,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:15,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:17,640 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 18:19:17,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:17,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918735035] [2023-08-26 18:19:17,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918735035] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:17,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:17,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-26 18:19:17,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192526143] [2023-08-26 18:19:17,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:17,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 18:19:17,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:17,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 18:19:17,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-08-26 18:19:17,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 196 [2023-08-26 18:19:17,645 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 18:19:17,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:17,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 196 [2023-08-26 18:19:17,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:18,017 INFO L124 PetriNetUnfolderBase]: 12/53 cut-off events. [2023-08-26 18:19:18,017 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-08-26 18:19:18,017 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 18:19:18,018 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 17 selfloop transitions, 5 changer transitions 15/38 dead transitions. [2023-08-26 18:19:18,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 38 transitions, 262 flow [2023-08-26 18:19:18,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 18:19:18,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 18:19:18,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 583 transitions. [2023-08-26 18:19:18,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3718112244897959 [2023-08-26 18:19:18,022 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 583 transitions. [2023-08-26 18:19:18,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 583 transitions. [2023-08-26 18:19:18,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:18,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 583 transitions. [2023-08-26 18:19:18,024 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 18:19:18,028 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 18:19:18,029 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 18:19:18,029 INFO L175 Difference]: Start difference. First operand has 48 places, 26 transitions, 132 flow. Second operand 8 states and 583 transitions. [2023-08-26 18:19:18,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 38 transitions, 262 flow [2023-08-26 18:19:18,030 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 18:19:18,030 INFO L231 Difference]: Finished difference. Result has 46 places, 20 transitions, 92 flow [2023-08-26 18:19:18,030 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 18:19:18,031 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 14 predicate places. [2023-08-26 18:19:18,031 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 20 transitions, 92 flow [2023-08-26 18:19:18,032 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 18:19:18,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:18,032 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 18:19:18,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 18:19:18,032 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 18:19:18,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:18,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1653119859, now seen corresponding path program 3 times [2023-08-26 18:19:18,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:18,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006943275] [2023-08-26 18:19:18,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:18,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:19,130 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 18:19:19,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:19,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006943275] [2023-08-26 18:19:19,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006943275] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:19,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:19,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 18:19:19,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600131372] [2023-08-26 18:19:19,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:19,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 18:19:19,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:19,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 18:19:19,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-08-26 18:19:19,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 196 [2023-08-26 18:19:19,134 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 18:19:19,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:19,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 196 [2023-08-26 18:19:19,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:19,311 INFO L124 PetriNetUnfolderBase]: 6/30 cut-off events. [2023-08-26 18:19:19,311 INFO L125 PetriNetUnfolderBase]: For 24/25 co-relation queries the response was YES. [2023-08-26 18:19:19,311 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 18:19:19,312 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2023-08-26 18:19:19,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 22 transitions, 148 flow [2023-08-26 18:19:19,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 18:19:19,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 18:19:19,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 659 transitions. [2023-08-26 18:19:19,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3735827664399093 [2023-08-26 18:19:19,314 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 659 transitions. [2023-08-26 18:19:19,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 659 transitions. [2023-08-26 18:19:19,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:19,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 659 transitions. [2023-08-26 18:19:19,316 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 18:19:19,319 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 18:19:19,320 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 18:19:19,320 INFO L175 Difference]: Start difference. First operand has 46 places, 20 transitions, 92 flow. Second operand 9 states and 659 transitions. [2023-08-26 18:19:19,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 22 transitions, 148 flow [2023-08-26 18:19:19,320 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 18:19:19,321 INFO L231 Difference]: Finished difference. Result has 37 places, 0 transitions, 0 flow [2023-08-26 18:19:19,321 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 18:19:19,321 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 5 predicate places. [2023-08-26 18:19:19,322 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 0 transitions, 0 flow [2023-08-26 18:19:19,322 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 18:19:19,324 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P1Err0ASSERT_VIOLATIONASSERT (8 of 9 remaining) [2023-08-26 18:19:19,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2023-08-26 18:19:19,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-08-26 18:19:19,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-08-26 18:19:19,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2023-08-26 18:19:19,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (3 of 9 remaining) [2023-08-26 18:19:19,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 9 remaining) [2023-08-26 18:19:19,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 9 remaining) [2023-08-26 18:19:19,326 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P1Err0ASSERT_VIOLATIONASSERT (0 of 9 remaining) [2023-08-26 18:19:19,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 18:19:19,326 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1] [2023-08-26 18:19:19,330 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 18:19:19,330 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 18:19:19,333 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 06:19:19 BasicIcfg [2023-08-26 18:19:19,333 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 18:19:19,334 INFO L158 Benchmark]: Toolchain (without parser) took 13974.68ms. Allocated memory was 354.4MB in the beginning and 629.1MB in the end (delta: 274.7MB). Free memory was 329.0MB in the beginning and 354.7MB in the end (delta: -25.7MB). Peak memory consumption was 251.8MB. Max. memory is 16.0GB. [2023-08-26 18:19:19,334 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 354.4MB. Free memory is still 330.9MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 18:19:19,334 INFO L158 Benchmark]: CACSL2BoogieTranslator took 626.56ms. Allocated memory is still 354.4MB. Free memory was 328.6MB in the beginning and 303.8MB in the end (delta: 24.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. [2023-08-26 18:19:19,335 INFO L158 Benchmark]: Boogie Procedure Inliner took 74.80ms. Allocated memory is still 354.4MB. Free memory was 303.8MB in the beginning and 300.4MB in the end (delta: 3.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:19:19,335 INFO L158 Benchmark]: Boogie Preprocessor took 53.00ms. Allocated memory is still 354.4MB. Free memory was 300.4MB in the beginning and 298.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:19:19,335 INFO L158 Benchmark]: RCFGBuilder took 703.66ms. Allocated memory is still 354.4MB. Free memory was 298.3MB in the beginning and 309.1MB in the end (delta: -10.8MB). Peak memory consumption was 38.5MB. Max. memory is 16.0GB. [2023-08-26 18:19:19,336 INFO L158 Benchmark]: TraceAbstraction took 12509.47ms. Allocated memory was 354.4MB in the beginning and 629.1MB in the end (delta: 274.7MB). Free memory was 309.1MB in the beginning and 354.7MB in the end (delta: -45.7MB). Peak memory consumption was 230.1MB. Max. memory is 16.0GB. [2023-08-26 18:19:19,337 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 354.4MB. Free memory is still 330.9MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 626.56ms. Allocated memory is still 354.4MB. Free memory was 328.6MB in the beginning and 303.8MB in the end (delta: 24.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 74.80ms. Allocated memory is still 354.4MB. Free memory was 303.8MB in the beginning and 300.4MB in the end (delta: 3.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 53.00ms. Allocated memory is still 354.4MB. Free memory was 300.4MB in the beginning and 298.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 703.66ms. Allocated memory is still 354.4MB. Free memory was 298.3MB in the beginning and 309.1MB in the end (delta: -10.8MB). Peak memory consumption was 38.5MB. Max. memory is 16.0GB. * TraceAbstraction took 12509.47ms. Allocated memory was 354.4MB in the beginning and 629.1MB in the end (delta: 274.7MB). Free memory was 309.1MB in the beginning and 354.7MB in the end (delta: -45.7MB). Peak memory consumption was 230.1MB. 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: 3.7s, 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: 12.4s, OverallIterations: 10, TraceHistogramMax: 1, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 105 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 105 mSDsluCounter, 7 SdHoareTripleChecker+Invalid, 0.8s 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, 0.2s SatisfiabilityAnalysisTime, 6.0s 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 18:19:19,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...