/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/goblint-regression/28-race_reach_09-ptrmunge_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 18:46:11,664 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 18:46:11,748 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 18:46:11,753 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 18:46:11,754 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 18:46:11,786 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 18:46:11,787 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 18:46:11,794 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 18:46:11,795 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 18:46:11,798 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 18:46:11,799 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 18:46:11,799 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 18:46:11,799 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 18:46:11,800 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 18:46:11,800 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 18:46:11,801 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 18:46:11,801 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 18:46:11,801 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 18:46:11,801 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 18:46:11,801 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 18:46:11,802 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 18:46:11,802 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 18:46:11,803 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 18:46:11,803 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 18:46:11,803 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 18:46:11,804 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 18:46:11,804 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 18:46:11,804 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:46:11,804 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 18:46:11,804 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 18:46:11,805 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 18:46:11,805 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 18:46:11,806 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 18:46:11,806 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 18:46:11,806 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 18:46:11,806 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 18:46:12,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 18:46:12,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 18:46:12,139 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 18:46:12,140 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 18:46:12,140 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 18:46:12,141 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_09-ptrmunge_racing.i [2023-08-26 18:46:13,222 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 18:46:13,476 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 18:46:13,476 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_09-ptrmunge_racing.i [2023-08-26 18:46:13,498 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0af1f7a2/93f2f26eb66f44c8a3ad44643efc7aa0/FLAG002f060eb [2023-08-26 18:46:13,510 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0af1f7a2/93f2f26eb66f44c8a3ad44643efc7aa0 [2023-08-26 18:46:13,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 18:46:13,513 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 18:46:13,514 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 18:46:13,514 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 18:46:13,516 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 18:46:13,517 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:46:13" (1/1) ... [2023-08-26 18:46:13,517 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@466557d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:46:13, skipping insertion in model container [2023-08-26 18:46:13,518 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:46:13" (1/1) ... [2023-08-26 18:46:13,561 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 18:46:13,881 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:46:13,894 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 18:46:13,921 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 18:46:13,923 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 18:46:13,950 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:46:13,992 INFO L206 MainTranslator]: Completed translation [2023-08-26 18:46:13,993 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:46:13 WrapperNode [2023-08-26 18:46:13,993 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 18:46:13,994 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 18:46:13,994 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 18:46:13,994 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 18:46:14,000 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:46:13" (1/1) ... [2023-08-26 18:46:14,032 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:46:13" (1/1) ... [2023-08-26 18:46:14,066 INFO L138 Inliner]: procedures = 172, calls = 51, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 228 [2023-08-26 18:46:14,067 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 18:46:14,068 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 18:46:14,069 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 18:46:14,069 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 18:46:14,076 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:46:13" (1/1) ... [2023-08-26 18:46:14,076 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:46:13" (1/1) ... [2023-08-26 18:46:14,094 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:46:13" (1/1) ... [2023-08-26 18:46:14,094 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:46:13" (1/1) ... [2023-08-26 18:46:14,100 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:46:13" (1/1) ... [2023-08-26 18:46:14,103 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:46:13" (1/1) ... [2023-08-26 18:46:14,105 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:46:13" (1/1) ... [2023-08-26 18:46:14,106 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:46:13" (1/1) ... [2023-08-26 18:46:14,121 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 18:46:14,122 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 18:46:14,122 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 18:46:14,122 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 18:46:14,122 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:46:13" (1/1) ... [2023-08-26 18:46:14,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:46:14,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:46:14,155 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 18:46:14,166 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 18:46:14,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 18:46:14,192 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-26 18:46:14,193 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-26 18:46:14,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 18:46:14,193 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 18:46:14,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 18:46:14,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 18:46:14,193 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-26 18:46:14,194 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-26 18:46:14,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 18:46:14,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 18:46:14,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 18:46:14,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 18:46:14,196 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 18:46:14,360 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 18:46:14,366 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 18:46:14,774 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 18:46:14,783 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 18:46:14,783 INFO L302 CfgBuilder]: Removed 24 assume(true) statements. [2023-08-26 18:46:14,785 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:46:14 BoogieIcfgContainer [2023-08-26 18:46:14,785 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 18:46:14,787 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 18:46:14,787 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 18:46:14,789 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 18:46:14,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:46:13" (1/3) ... [2023-08-26 18:46:14,806 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4120432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:46:14, skipping insertion in model container [2023-08-26 18:46:14,806 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:46:13" (2/3) ... [2023-08-26 18:46:14,807 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4120432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:46:14, skipping insertion in model container [2023-08-26 18:46:14,807 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:46:14" (3/3) ... [2023-08-26 18:46:14,808 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_09-ptrmunge_racing.i [2023-08-26 18:46:14,821 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 18:46:14,822 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-08-26 18:46:14,822 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 18:46:14,893 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 18:46:14,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 255 transitions, 532 flow [2023-08-26 18:46:15,035 INFO L124 PetriNetUnfolderBase]: 61/464 cut-off events. [2023-08-26 18:46:15,036 INFO L125 PetriNetUnfolderBase]: For 8/10 co-relation queries the response was YES. [2023-08-26 18:46:15,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 484 conditions, 464 events. 61/464 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2266 event pairs, 0 based on Foata normal form. 0/336 useless extension candidates. Maximal degree in co-relation 252. Up to 8 conditions per place. [2023-08-26 18:46:15,047 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 255 transitions, 532 flow [2023-08-26 18:46:15,056 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 255 transitions, 532 flow [2023-08-26 18:46:15,059 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:46:15,066 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 255 transitions, 532 flow [2023-08-26 18:46:15,068 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 255 transitions, 532 flow [2023-08-26 18:46:15,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 255 transitions, 532 flow [2023-08-26 18:46:15,148 INFO L124 PetriNetUnfolderBase]: 61/464 cut-off events. [2023-08-26 18:46:15,149 INFO L125 PetriNetUnfolderBase]: For 8/10 co-relation queries the response was YES. [2023-08-26 18:46:15,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 484 conditions, 464 events. 61/464 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2266 event pairs, 0 based on Foata normal form. 0/336 useless extension candidates. Maximal degree in co-relation 252. Up to 8 conditions per place. [2023-08-26 18:46:15,172 INFO L119 LiptonReduction]: Number of co-enabled transitions 28350 [2023-08-26 18:46:20,163 INFO L134 LiptonReduction]: Checked pairs total: 67023 [2023-08-26 18:46:20,164 INFO L136 LiptonReduction]: Total number of compositions: 219 [2023-08-26 18:46:20,178 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:46:20,183 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;@2fa9d690, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:46:20,183 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-08-26 18:46:20,185 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:46:20,185 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 18:46:20,185 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:46:20,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:46:20,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 18:46:20,186 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr10ASSERT_VIOLATIONASSERT, t1_funErr10ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 18:46:20,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:46:20,190 INFO L85 PathProgramCache]: Analyzing trace with hash 33354, now seen corresponding path program 1 times [2023-08-26 18:46:20,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:46:20,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810479998] [2023-08-26 18:46:20,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:46:20,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:46:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:46:20,525 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 18:46:20,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:46:20,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810479998] [2023-08-26 18:46:20,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810479998] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:46:20,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:46:20,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:46:20,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979994465] [2023-08-26 18:46:20,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:46:20,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:46:20,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:46:20,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:46:20,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:46:20,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 474 [2023-08-26 18:46:20,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 108 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:20,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:46:20,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 474 [2023-08-26 18:46:20,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:46:22,710 INFO L124 PetriNetUnfolderBase]: 15143/24948 cut-off events. [2023-08-26 18:46:22,710 INFO L125 PetriNetUnfolderBase]: For 176/176 co-relation queries the response was YES. [2023-08-26 18:46:22,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48277 conditions, 24948 events. 15143/24948 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 1204. Compared 201343 event pairs, 7014 based on Foata normal form. 2118/16010 useless extension candidates. Maximal degree in co-relation 47006. Up to 23112 conditions per place. [2023-08-26 18:46:22,861 INFO L140 encePairwiseOnDemand]: 448/474 looper letters, 93 selfloop transitions, 2 changer transitions 0/110 dead transitions. [2023-08-26 18:46:22,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 110 transitions, 432 flow [2023-08-26 18:46:22,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:46:22,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:46:22,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 645 transitions. [2023-08-26 18:46:22,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45358649789029537 [2023-08-26 18:46:22,879 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 645 transitions. [2023-08-26 18:46:22,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 645 transitions. [2023-08-26 18:46:22,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:46:22,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 645 transitions. [2023-08-26 18:46:22,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:22,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:22,898 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:22,899 INFO L175 Difference]: Start difference. First operand has 87 places, 108 transitions, 238 flow. Second operand 3 states and 645 transitions. [2023-08-26 18:46:22,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 110 transitions, 432 flow [2023-08-26 18:46:22,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 110 transitions, 432 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:46:22,909 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 204 flow [2023-08-26 18:46:22,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2023-08-26 18:46:22,915 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 1 predicate places. [2023-08-26 18:46:22,915 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 204 flow [2023-08-26 18:46:22,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:22,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:46:22,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 18:46:22,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 18:46:22,917 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr10ASSERT_VIOLATIONASSERT, t1_funErr10ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 18:46:22,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:46:22,918 INFO L85 PathProgramCache]: Analyzing trace with hash 33356, now seen corresponding path program 1 times [2023-08-26 18:46:22,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:46:22,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755330793] [2023-08-26 18:46:22,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:46:22,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:46:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:46:23,003 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 18:46:23,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:46:23,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755330793] [2023-08-26 18:46:23,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755330793] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:46:23,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:46:23,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:46:23,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978908381] [2023-08-26 18:46:23,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:46:23,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:46:23,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:46:23,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:46:23,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:46:23,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 474 [2023-08-26 18:46:23,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:23,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:46:23,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 474 [2023-08-26 18:46:23,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:46:24,794 INFO L124 PetriNetUnfolderBase]: 14852/23753 cut-off events. [2023-08-26 18:46:24,795 INFO L125 PetriNetUnfolderBase]: For 239/239 co-relation queries the response was YES. [2023-08-26 18:46:24,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46491 conditions, 23753 events. 14852/23753 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 1173. Compared 182791 event pairs, 12188 based on Foata normal form. 0/13043 useless extension candidates. Maximal degree in co-relation 45316. Up to 19217 conditions per place. [2023-08-26 18:46:24,935 INFO L140 encePairwiseOnDemand]: 470/474 looper letters, 112 selfloop transitions, 2 changer transitions 0/128 dead transitions. [2023-08-26 18:46:24,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 128 transitions, 516 flow [2023-08-26 18:46:24,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:46:24,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:46:24,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 644 transitions. [2023-08-26 18:46:24,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45288326300984527 [2023-08-26 18:46:24,939 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 644 transitions. [2023-08-26 18:46:24,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 644 transitions. [2023-08-26 18:46:24,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:46:24,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 644 transitions. [2023-08-26 18:46:24,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:24,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:24,945 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:24,945 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 204 flow. Second operand 3 states and 644 transitions. [2023-08-26 18:46:24,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 128 transitions, 516 flow [2023-08-26 18:46:24,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 128 transitions, 512 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:46:24,951 INFO L231 Difference]: Finished difference. Result has 86 places, 84 transitions, 200 flow [2023-08-26 18:46:24,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=86, PETRI_TRANSITIONS=84} [2023-08-26 18:46:24,954 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -1 predicate places. [2023-08-26 18:46:24,954 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 84 transitions, 200 flow [2023-08-26 18:46:24,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:24,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:46:24,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 18:46:24,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 18:46:24,958 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr10ASSERT_VIOLATIONASSERT, t1_funErr10ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 18:46:24,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:46:24,961 INFO L85 PathProgramCache]: Analyzing trace with hash 994470295, now seen corresponding path program 1 times [2023-08-26 18:46:24,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:46:24,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008260497] [2023-08-26 18:46:24,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:46:24,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:46:24,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:46:25,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:46:25,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:46:25,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008260497] [2023-08-26 18:46:25,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008260497] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:46:25,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82168898] [2023-08-26 18:46:25,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:46:25,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:46:25,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:46:25,111 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 18:46:25,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 18:46:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:46:25,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 18:46:25,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:46:25,278 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-26 18:46:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:46:25,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 18:46:25,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:46:25,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82168898] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 18:46:25,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 18:46:25,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-26 18:46:25,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337967756] [2023-08-26 18:46:25,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 18:46:25,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 18:46:25,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:46:25,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 18:46:25,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-26 18:46:25,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 474 [2023-08-26 18:46:25,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 84 transitions, 200 flow. Second operand has 8 states, 8 states have (on average 173.875) internal successors, (1391), 8 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:25,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:46:25,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 474 [2023-08-26 18:46:25,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:46:25,452 INFO L124 PetriNetUnfolderBase]: 47/133 cut-off events. [2023-08-26 18:46:25,452 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 18:46:25,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 133 events. 47/133 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 483 event pairs, 19 based on Foata normal form. 23/125 useless extension candidates. Maximal degree in co-relation 281. Up to 90 conditions per place. [2023-08-26 18:46:25,453 INFO L140 encePairwiseOnDemand]: 470/474 looper letters, 37 selfloop transitions, 2 changer transitions 11/56 dead transitions. [2023-08-26 18:46:25,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 56 transitions, 219 flow [2023-08-26 18:46:25,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:46:25,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:46:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 739 transitions. [2023-08-26 18:46:25,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38976793248945146 [2023-08-26 18:46:25,456 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 739 transitions. [2023-08-26 18:46:25,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 739 transitions. [2023-08-26 18:46:25,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:46:25,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 739 transitions. [2023-08-26 18:46:25,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 184.75) internal successors, (739), 4 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:25,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:25,462 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:25,462 INFO L175 Difference]: Start difference. First operand has 86 places, 84 transitions, 200 flow. Second operand 4 states and 739 transitions. [2023-08-26 18:46:25,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 56 transitions, 219 flow [2023-08-26 18:46:25,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 216 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:46:25,464 INFO L231 Difference]: Finished difference. Result has 40 places, 27 transitions, 64 flow [2023-08-26 18:46:25,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=40, PETRI_TRANSITIONS=27} [2023-08-26 18:46:25,465 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -47 predicate places. [2023-08-26 18:46:25,465 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 27 transitions, 64 flow [2023-08-26 18:46:25,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 173.875) internal successors, (1391), 8 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:25,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:46:25,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:46:25,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-26 18:46:25,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:46:25,671 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr10ASSERT_VIOLATIONASSERT, t1_funErr10ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 18:46:25,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:46:25,672 INFO L85 PathProgramCache]: Analyzing trace with hash -2091105308, now seen corresponding path program 1 times [2023-08-26 18:46:25,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:46:25,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816115799] [2023-08-26 18:46:25,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:46:25,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:46:25,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:46:25,838 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 18:46:25,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:46:25,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816115799] [2023-08-26 18:46:25,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816115799] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:46:25,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:46:25,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:46:25,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862141552] [2023-08-26 18:46:25,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:46:25,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:46:25,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:46:25,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:46:25,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:46:25,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 474 [2023-08-26 18:46:25,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 27 transitions, 64 flow. Second operand has 5 states, 5 states have (on average 168.2) internal successors, (841), 5 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:25,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:46:25,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 474 [2023-08-26 18:46:25,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:46:25,947 INFO L124 PetriNetUnfolderBase]: 28/85 cut-off events. [2023-08-26 18:46:25,948 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-26 18:46:25,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 85 events. 28/85 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 233 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 180. Up to 70 conditions per place. [2023-08-26 18:46:25,948 INFO L140 encePairwiseOnDemand]: 467/474 looper letters, 18 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2023-08-26 18:46:25,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 24 transitions, 100 flow [2023-08-26 18:46:25,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:46:25,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:46:25,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 693 transitions. [2023-08-26 18:46:25,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36550632911392406 [2023-08-26 18:46:25,951 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 693 transitions. [2023-08-26 18:46:25,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 693 transitions. [2023-08-26 18:46:25,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:46:25,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 693 transitions. [2023-08-26 18:46:25,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 173.25) internal successors, (693), 4 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:25,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:25,957 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:25,957 INFO L175 Difference]: Start difference. First operand has 40 places, 27 transitions, 64 flow. Second operand 4 states and 693 transitions. [2023-08-26 18:46:25,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 24 transitions, 100 flow [2023-08-26 18:46:25,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 24 transitions, 96 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:46:25,959 INFO L231 Difference]: Finished difference. Result has 31 places, 22 transitions, 55 flow [2023-08-26 18:46:25,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=55, PETRI_PLACES=31, PETRI_TRANSITIONS=22} [2023-08-26 18:46:25,961 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -56 predicate places. [2023-08-26 18:46:25,961 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 22 transitions, 55 flow [2023-08-26 18:46:25,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 168.2) internal successors, (841), 5 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:25,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:46:25,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:46:25,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 18:46:25,962 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1_funErr10ASSERT_VIOLATIONASSERT === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr10ASSERT_VIOLATIONASSERT, t1_funErr10ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 18:46:25,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:46:25,963 INFO L85 PathProgramCache]: Analyzing trace with hash -2091105143, now seen corresponding path program 1 times [2023-08-26 18:46:25,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:46:25,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669936494] [2023-08-26 18:46:25,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:46:25,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:46:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:46:26,092 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 18:46:26,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:46:26,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669936494] [2023-08-26 18:46:26,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669936494] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:46:26,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:46:26,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:46:26,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059008428] [2023-08-26 18:46:26,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:46:26,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:46:26,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:46:26,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:46:26,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:46:26,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 474 [2023-08-26 18:46:26,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 55 flow. Second operand has 5 states, 5 states have (on average 165.2) internal successors, (826), 5 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:26,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:46:26,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 474 [2023-08-26 18:46:26,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:46:26,146 INFO L124 PetriNetUnfolderBase]: 26/95 cut-off events. [2023-08-26 18:46:26,146 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 18:46:26,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 95 events. 26/95 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 331 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 202. Up to 32 conditions per place. [2023-08-26 18:46:26,147 INFO L140 encePairwiseOnDemand]: 469/474 looper letters, 24 selfloop transitions, 5 changer transitions 0/33 dead transitions. [2023-08-26 18:46:26,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 33 transitions, 137 flow [2023-08-26 18:46:26,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:46:26,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:46:26,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 686 transitions. [2023-08-26 18:46:26,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3618143459915612 [2023-08-26 18:46:26,149 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 686 transitions. [2023-08-26 18:46:26,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 686 transitions. [2023-08-26 18:46:26,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:46:26,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 686 transitions. [2023-08-26 18:46:26,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 171.5) internal successors, (686), 4 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:26,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:26,155 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:26,155 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 55 flow. Second operand 4 states and 686 transitions. [2023-08-26 18:46:26,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 33 transitions, 137 flow [2023-08-26 18:46:26,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 33 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:46:26,157 INFO L231 Difference]: Finished difference. Result has 33 places, 24 transitions, 73 flow [2023-08-26 18:46:26,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=73, PETRI_PLACES=33, PETRI_TRANSITIONS=24} [2023-08-26 18:46:26,159 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -54 predicate places. [2023-08-26 18:46:26,159 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 24 transitions, 73 flow [2023-08-26 18:46:26,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 165.2) internal successors, (826), 5 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:26,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:46:26,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:46:26,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 18:46:26,161 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr10ASSERT_VIOLATIONASSERT, t1_funErr10ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 18:46:26,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:46:26,161 INFO L85 PathProgramCache]: Analyzing trace with hash -2091105309, now seen corresponding path program 1 times [2023-08-26 18:46:26,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:46:26,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008756244] [2023-08-26 18:46:26,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:46:26,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:46:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:46:26,254 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 18:46:26,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:46:26,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008756244] [2023-08-26 18:46:26,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008756244] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:46:26,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:46:26,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:46:26,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319934979] [2023-08-26 18:46:26,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:46:26,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:46:26,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:46:26,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:46:26,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:46:26,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 474 [2023-08-26 18:46:26,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 24 transitions, 73 flow. Second operand has 5 states, 5 states have (on average 166.2) internal successors, (831), 5 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:26,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:46:26,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 474 [2023-08-26 18:46:26,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:46:26,302 INFO L124 PetriNetUnfolderBase]: 16/64 cut-off events. [2023-08-26 18:46:26,302 INFO L125 PetriNetUnfolderBase]: For 12/13 co-relation queries the response was YES. [2023-08-26 18:46:26,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 64 events. 16/64 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 181 event pairs, 3 based on Foata normal form. 10/69 useless extension candidates. Maximal degree in co-relation 160. Up to 45 conditions per place. [2023-08-26 18:46:26,302 INFO L140 encePairwiseOnDemand]: 467/474 looper letters, 7 selfloop transitions, 2 changer transitions 10/21 dead transitions. [2023-08-26 18:46:26,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 21 transitions, 104 flow [2023-08-26 18:46:26,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:46:26,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:46:26,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 680 transitions. [2023-08-26 18:46:26,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35864978902953587 [2023-08-26 18:46:26,305 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 680 transitions. [2023-08-26 18:46:26,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 680 transitions. [2023-08-26 18:46:26,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:46:26,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 680 transitions. [2023-08-26 18:46:26,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:26,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:26,310 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:26,310 INFO L175 Difference]: Start difference. First operand has 33 places, 24 transitions, 73 flow. Second operand 4 states and 680 transitions. [2023-08-26 18:46:26,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 21 transitions, 104 flow [2023-08-26 18:46:26,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 21 transitions, 101 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:46:26,311 INFO L231 Difference]: Finished difference. Result has 30 places, 10 transitions, 43 flow [2023-08-26 18:46:26,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=43, PETRI_PLACES=30, PETRI_TRANSITIONS=10} [2023-08-26 18:46:26,312 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -57 predicate places. [2023-08-26 18:46:26,312 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 10 transitions, 43 flow [2023-08-26 18:46:26,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 166.2) internal successors, (831), 5 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:26,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:46:26,313 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:46:26,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 18:46:26,313 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1_funErr10ASSERT_VIOLATIONASSERT === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr10ASSERT_VIOLATIONASSERT, t1_funErr10ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 18:46:26,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:46:26,313 INFO L85 PathProgramCache]: Analyzing trace with hash -62157525, now seen corresponding path program 1 times [2023-08-26 18:46:26,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:46:26,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962485292] [2023-08-26 18:46:26,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:46:26,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:46:26,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:46:26,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:46:26,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:46:26,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962485292] [2023-08-26 18:46:26,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962485292] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:46:26,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559638362] [2023-08-26 18:46:26,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:46:26,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:46:26,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:46:26,429 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 18:46:26,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 18:46:26,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:46:26,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-26 18:46:26,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:46:26,535 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 18:46:26,535 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-26 18:46:26,560 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-26 18:46:26,616 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-26 18:46:26,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:46:26,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 18:46:26,687 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_59 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1_ids~0#1.base| v_ArrVal_59) |c_~#global1~0.base|) |c_~#global1~0.offset|) 0)) is different from false [2023-08-26 18:46:26,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-26 18:46:26,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559638362] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 18:46:26,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 18:46:26,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2023-08-26 18:46:26,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179716068] [2023-08-26 18:46:26,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 18:46:26,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 18:46:26,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:46:26,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 18:46:26,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=48, Unknown=3, NotChecked=14, Total=90 [2023-08-26 18:46:26,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 474 [2023-08-26 18:46:26,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 10 transitions, 43 flow. Second operand has 10 states, 10 states have (on average 166.3) internal successors, (1663), 10 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:26,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:46:26,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 474 [2023-08-26 18:46:26,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:46:26,744 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2023-08-26 18:46:26,744 INFO L125 PetriNetUnfolderBase]: For 14/15 co-relation queries the response was YES. [2023-08-26 18:46:26,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 22 events. 3/22 cut-off events. For 14/15 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 44 event pairs, 1 based on Foata normal form. 1/23 useless extension candidates. Maximal degree in co-relation 64. Up to 11 conditions per place. [2023-08-26 18:46:26,744 INFO L140 encePairwiseOnDemand]: 471/474 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-26 18:46:26,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 10 transitions, 58 flow [2023-08-26 18:46:26,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:46:26,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:46:26,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 665 transitions. [2023-08-26 18:46:26,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3507383966244726 [2023-08-26 18:46:26,747 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 665 transitions. [2023-08-26 18:46:26,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 665 transitions. [2023-08-26 18:46:26,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:46:26,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 665 transitions. [2023-08-26 18:46:26,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 166.25) internal successors, (665), 4 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:26,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:26,752 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 474.0) internal successors, (2370), 5 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:26,752 INFO L175 Difference]: Start difference. First operand has 30 places, 10 transitions, 43 flow. Second operand 4 states and 665 transitions. [2023-08-26 18:46:26,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 10 transitions, 58 flow [2023-08-26 18:46:26,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 10 transitions, 52 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 18:46:26,754 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-08-26 18:46:26,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2023-08-26 18:46:26,755 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, -66 predicate places. [2023-08-26 18:46:26,755 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-08-26 18:46:26,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 166.3) internal successors, (1663), 10 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:26,757 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 52 remaining) [2023-08-26 18:46:26,758 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr10ASSERT_VIOLATIONASSERT (50 of 52 remaining) [2023-08-26 18:46:26,758 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr10ASSERT_VIOLATIONASSERT (49 of 52 remaining) [2023-08-26 18:46:26,758 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 52 remaining) [2023-08-26 18:46:26,758 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 52 remaining) [2023-08-26 18:46:26,758 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 52 remaining) [2023-08-26 18:46:26,758 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 52 remaining) [2023-08-26 18:46:26,759 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 52 remaining) [2023-08-26 18:46:26,759 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 52 remaining) [2023-08-26 18:46:26,759 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 52 remaining) [2023-08-26 18:46:26,759 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 52 remaining) [2023-08-26 18:46:26,759 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 52 remaining) [2023-08-26 18:46:26,761 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 52 remaining) [2023-08-26 18:46:26,761 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 52 remaining) [2023-08-26 18:46:26,761 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 52 remaining) [2023-08-26 18:46:26,761 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 52 remaining) [2023-08-26 18:46:26,761 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 52 remaining) [2023-08-26 18:46:26,761 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 52 remaining) [2023-08-26 18:46:26,762 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 52 remaining) [2023-08-26 18:46:26,762 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 52 remaining) [2023-08-26 18:46:26,762 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 52 remaining) [2023-08-26 18:46:26,762 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 52 remaining) [2023-08-26 18:46:26,762 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 52 remaining) [2023-08-26 18:46:26,762 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 52 remaining) [2023-08-26 18:46:26,762 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 52 remaining) [2023-08-26 18:46:26,762 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 52 remaining) [2023-08-26 18:46:26,762 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 52 remaining) [2023-08-26 18:46:26,763 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 52 remaining) [2023-08-26 18:46:26,763 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr10ASSERT_VIOLATIONASSERT (23 of 52 remaining) [2023-08-26 18:46:26,763 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 52 remaining) [2023-08-26 18:46:26,763 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 52 remaining) [2023-08-26 18:46:26,763 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 52 remaining) [2023-08-26 18:46:26,763 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 52 remaining) [2023-08-26 18:46:26,763 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 52 remaining) [2023-08-26 18:46:26,763 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 52 remaining) [2023-08-26 18:46:26,763 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 52 remaining) [2023-08-26 18:46:26,763 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 52 remaining) [2023-08-26 18:46:26,764 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 52 remaining) [2023-08-26 18:46:26,764 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 52 remaining) [2023-08-26 18:46:26,764 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 52 remaining) [2023-08-26 18:46:26,764 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 52 remaining) [2023-08-26 18:46:26,764 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 52 remaining) [2023-08-26 18:46:26,764 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 52 remaining) [2023-08-26 18:46:26,764 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 52 remaining) [2023-08-26 18:46:26,764 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 52 remaining) [2023-08-26 18:46:26,764 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 52 remaining) [2023-08-26 18:46:26,765 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr10ASSERT_VIOLATIONASSERT (5 of 52 remaining) [2023-08-26 18:46:26,765 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 52 remaining) [2023-08-26 18:46:26,765 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 52 remaining) [2023-08-26 18:46:26,765 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 52 remaining) [2023-08-26 18:46:26,765 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 52 remaining) [2023-08-26 18:46:26,765 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 52 remaining) [2023-08-26 18:46:26,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-26 18:46:26,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-08-26 18:46:26,971 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:46:26,973 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-26 18:46:26,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 255 transitions, 532 flow [2023-08-26 18:46:27,026 INFO L124 PetriNetUnfolderBase]: 61/464 cut-off events. [2023-08-26 18:46:27,027 INFO L125 PetriNetUnfolderBase]: For 8/10 co-relation queries the response was YES. [2023-08-26 18:46:27,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 484 conditions, 464 events. 61/464 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2266 event pairs, 0 based on Foata normal form. 0/336 useless extension candidates. Maximal degree in co-relation 252. Up to 8 conditions per place. [2023-08-26 18:46:27,031 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 255 transitions, 532 flow [2023-08-26 18:46:27,034 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 255 transitions, 532 flow [2023-08-26 18:46:27,034 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:46:27,035 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 255 transitions, 532 flow [2023-08-26 18:46:27,035 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 255 transitions, 532 flow [2023-08-26 18:46:27,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 255 transitions, 532 flow [2023-08-26 18:46:27,077 INFO L124 PetriNetUnfolderBase]: 61/464 cut-off events. [2023-08-26 18:46:27,077 INFO L125 PetriNetUnfolderBase]: For 8/10 co-relation queries the response was YES. [2023-08-26 18:46:27,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 484 conditions, 464 events. 61/464 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2266 event pairs, 0 based on Foata normal form. 0/336 useless extension candidates. Maximal degree in co-relation 252. Up to 8 conditions per place. [2023-08-26 18:46:27,095 INFO L119 LiptonReduction]: Number of co-enabled transitions 28350 [2023-08-26 18:46:31,937 INFO L134 LiptonReduction]: Checked pairs total: 67023 [2023-08-26 18:46:31,937 INFO L136 LiptonReduction]: Total number of compositions: 218 [2023-08-26 18:46:31,939 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 18:46:31,939 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;@2fa9d690, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:46:31,939 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-26 18:46:31,943 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:46:31,943 INFO L124 PetriNetUnfolderBase]: 1/31 cut-off events. [2023-08-26 18:46:31,944 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:46:31,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:46:31,944 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 18:46:31,944 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 18:46:31,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:46:31,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1398201856, now seen corresponding path program 1 times [2023-08-26 18:46:31,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:46:31,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468102714] [2023-08-26 18:46:31,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:46:31,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:46:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 18:46:31,957 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 18:46:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 18:46:31,976 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 18:46:31,976 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 18:46:31,976 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-26 18:46:31,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-26 18:46:31,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 18:46:31,977 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 18:46:31,978 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-26 18:46:31,978 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 18:46:31,978 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 18:46:32,054 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-26 18:46:32,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 356 places, 411 transitions, 870 flow [2023-08-26 18:46:32,344 INFO L124 PetriNetUnfolderBase]: 205/1347 cut-off events. [2023-08-26 18:46:32,344 INFO L125 PetriNetUnfolderBase]: For 72/78 co-relation queries the response was YES. [2023-08-26 18:46:32,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1444 conditions, 1347 events. 205/1347 cut-off events. For 72/78 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 8953 event pairs, 2 based on Foata normal form. 0/979 useless extension candidates. Maximal degree in co-relation 813. Up to 32 conditions per place. [2023-08-26 18:46:32,369 INFO L82 GeneralOperation]: Start removeDead. Operand has 356 places, 411 transitions, 870 flow [2023-08-26 18:46:32,386 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 356 places, 411 transitions, 870 flow [2023-08-26 18:46:32,386 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:46:32,386 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 356 places, 411 transitions, 870 flow [2023-08-26 18:46:32,386 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 356 places, 411 transitions, 870 flow [2023-08-26 18:46:32,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 356 places, 411 transitions, 870 flow [2023-08-26 18:46:32,576 INFO L124 PetriNetUnfolderBase]: 205/1347 cut-off events. [2023-08-26 18:46:32,576 INFO L125 PetriNetUnfolderBase]: For 72/78 co-relation queries the response was YES. [2023-08-26 18:46:32,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1444 conditions, 1347 events. 205/1347 cut-off events. For 72/78 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 8953 event pairs, 2 based on Foata normal form. 0/979 useless extension candidates. Maximal degree in co-relation 813. Up to 32 conditions per place. [2023-08-26 18:46:32,682 INFO L119 LiptonReduction]: Number of co-enabled transitions 104700 [2023-08-26 18:46:38,488 INFO L134 LiptonReduction]: Checked pairs total: 255818 [2023-08-26 18:46:38,489 INFO L136 LiptonReduction]: Total number of compositions: 332 [2023-08-26 18:46:38,490 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:46:38,491 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;@2fa9d690, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:46:38,491 INFO L358 AbstractCegarLoop]: Starting to check reachability of 74 error locations. [2023-08-26 18:46:38,492 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:46:38,492 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 18:46:38,492 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:46:38,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:46:38,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 18:46:38,492 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2023-08-26 18:46:38,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:46:38,493 INFO L85 PathProgramCache]: Analyzing trace with hash 68978, now seen corresponding path program 1 times [2023-08-26 18:46:38,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:46:38,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633369890] [2023-08-26 18:46:38,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:46:38,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:46:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:46:38,538 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 18:46:38,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:46:38,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633369890] [2023-08-26 18:46:38,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633369890] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:46:38,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:46:38,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:46:38,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307166046] [2023-08-26 18:46:38,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:46:38,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:46:38,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:46:38,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:46:38,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:46:38,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 743 [2023-08-26 18:46:38,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 194 transitions, 436 flow. Second operand has 3 states, 3 states have (on average 276.6666666666667) internal successors, (830), 3 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:46:38,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:46:38,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 743 [2023-08-26 18:46:38,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand