/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_12-ptr_racefree_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 03:49:15,093 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 03:49:15,172 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 03:49:15,177 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 03:49:15,178 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 03:49:15,178 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 03:49:15,178 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 03:49:15,205 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 03:49:15,206 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 03:49:15,209 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 03:49:15,210 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 03:49:15,210 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 03:49:15,211 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 03:49:15,212 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 03:49:15,212 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 03:49:15,212 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 03:49:15,213 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 03:49:15,213 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 03:49:15,213 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 03:49:15,213 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 03:49:15,213 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 03:49:15,214 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 03:49:15,214 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 03:49:15,214 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 03:49:15,214 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 03:49:15,215 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 03:49:15,216 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 03:49:15,216 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 03:49:15,216 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 03:49:15,217 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 03:49:15,217 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:49:15,218 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 03:49:15,218 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 03:49:15,218 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 03:49:15,218 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 03:49:15,218 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 03:49:15,218 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 03:49:15,218 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 03:49:15,219 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 03:49:15,219 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 03:49:15,219 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 03:49:15,219 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 03:49:15,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 03:49:15,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 03:49:15,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 03:49:15,460 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 03:49:15,460 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 03:49:15,461 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_12-ptr_racefree_bound2.i [2023-08-04 03:49:16,601 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 03:49:16,866 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 03:49:16,866 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_12-ptr_racefree_bound2.i [2023-08-04 03:49:16,889 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c0377ca4/34a7e62e97ef4eb39e01f71f745a8c72/FLAGd07cdeef3 [2023-08-04 03:49:16,903 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c0377ca4/34a7e62e97ef4eb39e01f71f745a8c72 [2023-08-04 03:49:16,908 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 03:49:16,909 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 03:49:16,912 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 03:49:16,912 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 03:49:16,915 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 03:49:16,915 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:49:16" (1/1) ... [2023-08-04 03:49:16,917 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5304a056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:49:16, skipping insertion in model container [2023-08-04 03:49:16,917 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:49:16" (1/1) ... [2023-08-04 03:49:16,971 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 03:49:17,284 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_12-ptr_racefree_bound2.i[30176,30189] [2023-08-04 03:49:17,306 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:49:17,325 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 03:49:17,347 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-04 03:49:17,349 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-04 03:49:17,361 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_12-ptr_racefree_bound2.i[30176,30189] [2023-08-04 03:49:17,367 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:49:17,410 INFO L206 MainTranslator]: Completed translation [2023-08-04 03:49:17,410 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:49:17 WrapperNode [2023-08-04 03:49:17,410 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 03:49:17,412 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 03:49:17,412 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 03:49:17,412 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 03:49:17,418 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:49:17" (1/1) ... [2023-08-04 03:49:17,431 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:49:17" (1/1) ... [2023-08-04 03:49:17,453 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2023-08-04 03:49:17,454 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 03:49:17,454 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 03:49:17,454 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 03:49:17,455 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 03:49:17,461 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:49:17" (1/1) ... [2023-08-04 03:49:17,462 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:49:17" (1/1) ... [2023-08-04 03:49:17,464 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:49:17" (1/1) ... [2023-08-04 03:49:17,464 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:49:17" (1/1) ... [2023-08-04 03:49:17,471 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:49:17" (1/1) ... [2023-08-04 03:49:17,485 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:49:17" (1/1) ... [2023-08-04 03:49:17,494 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:49:17" (1/1) ... [2023-08-04 03:49:17,496 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:49:17" (1/1) ... [2023-08-04 03:49:17,498 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 03:49:17,499 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 03:49:17,499 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 03:49:17,499 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 03:49:17,500 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:49:17" (1/1) ... [2023-08-04 03:49:17,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:49:17,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:49:17,535 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) [2023-08-04 03:49:17,547 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 [2023-08-04 03:49:17,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 03:49:17,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 03:49:17,574 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-04 03:49:17,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 03:49:17,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 03:49:17,575 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-04 03:49:17,576 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-04 03:49:17,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 03:49:17,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 03:49:17,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 03:49:17,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 03:49:17,580 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 03:49:17,766 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 03:49:17,768 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 03:49:18,008 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 03:49:18,014 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 03:49:18,014 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-04 03:49:18,016 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:49:18 BoogieIcfgContainer [2023-08-04 03:49:18,016 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 03:49:18,018 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 03:49:18,018 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 03:49:18,021 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 03:49:18,021 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 03:49:16" (1/3) ... [2023-08-04 03:49:18,022 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee34e4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:49:18, skipping insertion in model container [2023-08-04 03:49:18,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:49:17" (2/3) ... [2023-08-04 03:49:18,022 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee34e4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:49:18, skipping insertion in model container [2023-08-04 03:49:18,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:49:18" (3/3) ... [2023-08-04 03:49:18,023 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_28-race_reach_12-ptr_racefree_bound2.i [2023-08-04 03:49:18,029 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 03:49:18,035 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 03:49:18,035 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 03:49:18,035 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 03:49:18,074 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-04 03:49:18,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 117 transitions, 242 flow [2023-08-04 03:49:18,151 INFO L124 PetriNetUnfolderBase]: 17/152 cut-off events. [2023-08-04 03:49:18,151 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 03:49:18,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 152 events. 17/152 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 349 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-08-04 03:49:18,157 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 117 transitions, 242 flow [2023-08-04 03:49:18,161 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 112 transitions, 229 flow [2023-08-04 03:49:18,164 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:49:18,172 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 112 transitions, 229 flow [2023-08-04 03:49:18,175 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 112 transitions, 229 flow [2023-08-04 03:49:18,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 112 transitions, 229 flow [2023-08-04 03:49:18,203 INFO L124 PetriNetUnfolderBase]: 16/147 cut-off events. [2023-08-04 03:49:18,203 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:49:18,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 147 events. 16/147 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 333 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-08-04 03:49:18,206 INFO L119 LiptonReduction]: Number of co-enabled transitions 2706 [2023-08-04 03:49:21,208 INFO L134 LiptonReduction]: Checked pairs total: 4811 [2023-08-04 03:49:21,208 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-08-04 03:49:21,219 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:49:21,225 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=true, 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;@643b2f1d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:49:21,225 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:49:21,228 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:49:21,229 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-04 03:49:21,229 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:49:21,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:49:21,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 03:49:21,230 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:49:21,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:49:21,234 INFO L85 PathProgramCache]: Analyzing trace with hash 13710433, now seen corresponding path program 1 times [2023-08-04 03:49:21,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:49:21,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753023636] [2023-08-04 03:49:21,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:49:21,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:49:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:49:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:49:21,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:49:21,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753023636] [2023-08-04 03:49:21,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753023636] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:49:21,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:49:21,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:49:21,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939458165] [2023-08-04 03:49:21,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:49:21,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:49:21,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:49:21,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:49:21,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:49:21,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 212 [2023-08-04 03:49:21,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 32 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:21,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:49:21,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 212 [2023-08-04 03:49:21,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:49:21,566 INFO L124 PetriNetUnfolderBase]: 80/188 cut-off events. [2023-08-04 03:49:21,566 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:49:21,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 188 events. 80/188 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 634 event pairs, 63 based on Foata normal form. 9/174 useless extension candidates. Maximal degree in co-relation 361. Up to 169 conditions per place. [2023-08-04 03:49:21,568 INFO L140 encePairwiseOnDemand]: 200/212 looper letters, 25 selfloop transitions, 2 changer transitions 6/34 dead transitions. [2023-08-04 03:49:21,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 135 flow [2023-08-04 03:49:21,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:49:21,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:49:21,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 344 transitions. [2023-08-04 03:49:21,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5408805031446541 [2023-08-04 03:49:21,582 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 344 transitions. [2023-08-04 03:49:21,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 344 transitions. [2023-08-04 03:49:21,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:49:21,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 344 transitions. [2023-08-04 03:49:21,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:21,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:21,593 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:21,595 INFO L175 Difference]: Start difference. First operand has 27 places, 32 transitions, 69 flow. Second operand 3 states and 344 transitions. [2023-08-04 03:49:21,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 135 flow [2023-08-04 03:49:21,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 135 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:49:21,599 INFO L231 Difference]: Finished difference. Result has 29 places, 18 transitions, 47 flow [2023-08-04 03:49:21,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=29, PETRI_TRANSITIONS=18} [2023-08-04 03:49:21,604 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-08-04 03:49:21,604 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 18 transitions, 47 flow [2023-08-04 03:49:21,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:21,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:49:21,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:49:21,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 03:49:21,605 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:49:21,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:49:21,606 INFO L85 PathProgramCache]: Analyzing trace with hash 79779237, now seen corresponding path program 1 times [2023-08-04 03:49:21,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:49:21,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728730838] [2023-08-04 03:49:21,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:49:21,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:49:21,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:49:21,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:49:21,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:49:21,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728730838] [2023-08-04 03:49:21,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728730838] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:49:21,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413745170] [2023-08-04 03:49:21,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:49:21,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:49:21,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:49:21,701 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) [2023-08-04 03:49:21,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 03:49:21,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:49:21,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:49:21,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:49:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:49:21,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:49:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:49:21,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413745170] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:49:21,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:49:21,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 03:49:21,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435592724] [2023-08-04 03:49:21,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:49:21,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:49:21,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:49:21,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:49:21,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:49:21,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 212 [2023-08-04 03:49:21,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 18 transitions, 47 flow. Second operand has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:21,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:49:21,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 212 [2023-08-04 03:49:21,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:49:21,946 INFO L124 PetriNetUnfolderBase]: 20/56 cut-off events. [2023-08-04 03:49:21,946 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-04 03:49:21,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 56 events. 20/56 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 109 event pairs, 0 based on Foata normal form. 11/67 useless extension candidates. Maximal degree in co-relation 127. Up to 42 conditions per place. [2023-08-04 03:49:21,947 INFO L140 encePairwiseOnDemand]: 209/212 looper letters, 0 selfloop transitions, 0 changer transitions 26/26 dead transitions. [2023-08-04 03:49:21,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 26 transitions, 111 flow [2023-08-04 03:49:21,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:49:21,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:49:21,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 418 transitions. [2023-08-04 03:49:21,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49292452830188677 [2023-08-04 03:49:21,950 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 418 transitions. [2023-08-04 03:49:21,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 418 transitions. [2023-08-04 03:49:21,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:49:21,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 418 transitions. [2023-08-04 03:49:21,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:21,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 212.0) internal successors, (1060), 5 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:21,955 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 212.0) internal successors, (1060), 5 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:21,955 INFO L175 Difference]: Start difference. First operand has 29 places, 18 transitions, 47 flow. Second operand 4 states and 418 transitions. [2023-08-04 03:49:21,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 26 transitions, 111 flow [2023-08-04 03:49:21,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 26 transitions, 105 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 03:49:21,956 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-08-04 03:49:21,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2023-08-04 03:49:21,957 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -6 predicate places. [2023-08-04 03:49:21,957 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-08-04 03:49:21,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.2) internal successors, (501), 5 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:21,960 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 03:49:21,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 03:49:22,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:49:22,167 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 03:49:22,169 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 03:49:22,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 117 transitions, 242 flow [2023-08-04 03:49:22,192 INFO L124 PetriNetUnfolderBase]: 17/152 cut-off events. [2023-08-04 03:49:22,192 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 03:49:22,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 152 events. 17/152 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 349 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-08-04 03:49:22,194 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 117 transitions, 242 flow [2023-08-04 03:49:22,196 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 112 transitions, 229 flow [2023-08-04 03:49:22,196 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:49:22,196 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 112 transitions, 229 flow [2023-08-04 03:49:22,196 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 112 transitions, 229 flow [2023-08-04 03:49:22,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 112 transitions, 229 flow [2023-08-04 03:49:22,218 INFO L124 PetriNetUnfolderBase]: 16/147 cut-off events. [2023-08-04 03:49:22,218 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:49:22,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 147 events. 16/147 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 333 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 73. Up to 4 conditions per place. [2023-08-04 03:49:22,225 INFO L119 LiptonReduction]: Number of co-enabled transitions 2706 [2023-08-04 03:49:24,891 INFO L134 LiptonReduction]: Checked pairs total: 4759 [2023-08-04 03:49:24,891 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-08-04 03:49:24,893 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:49:24,894 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=true, 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;@643b2f1d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:49:24,894 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:49:24,897 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:49:24,897 INFO L124 PetriNetUnfolderBase]: 2/23 cut-off events. [2023-08-04 03:49:24,897 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:49:24,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:49:24,897 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 03:49:24,898 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:49:24,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:49:24,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1203083657, now seen corresponding path program 1 times [2023-08-04 03:49:24,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:49:24,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163995846] [2023-08-04 03:49:24,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:49:24,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:49:24,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:49:24,920 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 03:49:24,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:49:24,947 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 03:49:24,947 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 03:49:24,948 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-04 03:49:24,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 03:49:24,948 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 03:49:24,948 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-04 03:49:24,949 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 03:49:24,949 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 03:49:24,966 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-04 03:49:24,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 152 transitions, 322 flow [2023-08-04 03:49:24,991 INFO L124 PetriNetUnfolderBase]: 31/246 cut-off events. [2023-08-04 03:49:24,991 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 03:49:24,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 246 events. 31/246 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 717 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 154. Up to 8 conditions per place. [2023-08-04 03:49:24,992 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 152 transitions, 322 flow [2023-08-04 03:49:24,994 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 152 transitions, 322 flow [2023-08-04 03:49:24,994 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:49:24,994 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 138 places, 152 transitions, 322 flow [2023-08-04 03:49:24,995 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 138 places, 152 transitions, 322 flow [2023-08-04 03:49:24,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 152 transitions, 322 flow [2023-08-04 03:49:25,017 INFO L124 PetriNetUnfolderBase]: 31/246 cut-off events. [2023-08-04 03:49:25,017 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 03:49:25,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 246 events. 31/246 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 717 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 154. Up to 8 conditions per place. [2023-08-04 03:49:25,023 INFO L119 LiptonReduction]: Number of co-enabled transitions 8316 [2023-08-04 03:49:27,779 INFO L134 LiptonReduction]: Checked pairs total: 16685 [2023-08-04 03:49:27,779 INFO L136 LiptonReduction]: Total number of compositions: 117 [2023-08-04 03:49:27,781 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:49:27,781 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=true, 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;@643b2f1d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:49:27,782 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:49:27,783 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:49:27,783 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-08-04 03:49:27,783 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:49:27,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:49:27,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 03:49:27,784 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:49:27,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:49:27,784 INFO L85 PathProgramCache]: Analyzing trace with hash 25992817, now seen corresponding path program 1 times [2023-08-04 03:49:27,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:49:27,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933702069] [2023-08-04 03:49:27,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:49:27,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:49:27,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:49:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:49:27,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:49:27,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933702069] [2023-08-04 03:49:27,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933702069] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:49:27,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:49:27,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:49:27,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638256690] [2023-08-04 03:49:27,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:49:27,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:49:27,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:49:27,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:49:27,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:49:27,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 269 [2023-08-04 03:49:27,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:27,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:49:27,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 269 [2023-08-04 03:49:27,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:49:28,180 INFO L124 PetriNetUnfolderBase]: 1642/2949 cut-off events. [2023-08-04 03:49:28,180 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-04 03:49:28,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5703 conditions, 2949 events. 1642/2949 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 17525 event pairs, 752 based on Foata normal form. 428/3078 useless extension candidates. Maximal degree in co-relation 589. Up to 2673 conditions per place. [2023-08-04 03:49:28,190 INFO L140 encePairwiseOnDemand]: 252/269 looper letters, 32 selfloop transitions, 2 changer transitions 10/51 dead transitions. [2023-08-04 03:49:28,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 204 flow [2023-08-04 03:49:28,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:49:28,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:49:28,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2023-08-04 03:49:28,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5464684014869888 [2023-08-04 03:49:28,193 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2023-08-04 03:49:28,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2023-08-04 03:49:28,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:49:28,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2023-08-04 03:49:28,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:28,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:28,201 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:28,204 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 128 flow. Second operand 3 states and 441 transitions. [2023-08-04 03:49:28,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 204 flow [2023-08-04 03:49:28,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 204 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:49:28,212 INFO L231 Difference]: Finished difference. Result has 47 places, 32 transitions, 82 flow [2023-08-04 03:49:28,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=47, PETRI_TRANSITIONS=32} [2023-08-04 03:49:28,214 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-04 03:49:28,216 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 32 transitions, 82 flow [2023-08-04 03:49:28,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:28,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:49:28,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:49:28,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 03:49:28,217 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:49:28,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:49:28,217 INFO L85 PathProgramCache]: Analyzing trace with hash -643138890, now seen corresponding path program 1 times [2023-08-04 03:49:28,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:49:28,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517821801] [2023-08-04 03:49:28,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:49:28,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:49:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:49:28,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:49:28,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:49:28,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517821801] [2023-08-04 03:49:28,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517821801] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:49:28,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336275910] [2023-08-04 03:49:28,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:49:28,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:49:28,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:49:28,314 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) [2023-08-04 03:49:28,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 03:49:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:49:28,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:49:28,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:49:28,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:49:28,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:49:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:49:28,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336275910] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:49:28,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:49:28,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 03:49:28,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754801514] [2023-08-04 03:49:28,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:49:28,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:49:28,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:49:28,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:49:28,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:49:28,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 269 [2023-08-04 03:49:28,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 32 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 127.2) internal successors, (636), 5 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:28,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:49:28,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 269 [2023-08-04 03:49:28,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:49:28,588 INFO L124 PetriNetUnfolderBase]: 808/1390 cut-off events. [2023-08-04 03:49:28,588 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-08-04 03:49:28,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2929 conditions, 1390 events. 808/1390 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 7257 event pairs, 72 based on Foata normal form. 9/1398 useless extension candidates. Maximal degree in co-relation 331. Up to 901 conditions per place. [2023-08-04 03:49:28,595 INFO L140 encePairwiseOnDemand]: 265/269 looper letters, 47 selfloop transitions, 3 changer transitions 1/58 dead transitions. [2023-08-04 03:49:28,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 58 transitions, 236 flow [2023-08-04 03:49:28,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:49:28,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:49:28,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 552 transitions. [2023-08-04 03:49:28,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5130111524163569 [2023-08-04 03:49:28,598 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 552 transitions. [2023-08-04 03:49:28,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 552 transitions. [2023-08-04 03:49:28,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:49:28,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 552 transitions. [2023-08-04 03:49:28,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:28,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:28,602 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:28,602 INFO L175 Difference]: Start difference. First operand has 47 places, 32 transitions, 82 flow. Second operand 4 states and 552 transitions. [2023-08-04 03:49:28,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 58 transitions, 236 flow [2023-08-04 03:49:28,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 58 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:49:28,605 INFO L231 Difference]: Finished difference. Result has 43 places, 32 transitions, 94 flow [2023-08-04 03:49:28,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=43, PETRI_TRANSITIONS=32} [2023-08-04 03:49:28,608 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -1 predicate places. [2023-08-04 03:49:28,608 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 32 transitions, 94 flow [2023-08-04 03:49:28,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.2) internal successors, (636), 5 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:28,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:49:28,609 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 03:49:28,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 03:49:28,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:49:28,814 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:49:28,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:49:28,815 INFO L85 PathProgramCache]: Analyzing trace with hash 2096858394, now seen corresponding path program 1 times [2023-08-04 03:49:28,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:49:28,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146658742] [2023-08-04 03:49:28,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:49:28,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:49:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:49:28,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:49:28,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:49:28,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146658742] [2023-08-04 03:49:28,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146658742] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:49:28,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545013645] [2023-08-04 03:49:28,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:49:28,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:49:28,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:49:28,974 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:49:28,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 03:49:29,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:49:29,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-04 03:49:29,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:49:29,081 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 03:49:29,082 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 [2023-08-04 03:49:29,104 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 [2023-08-04 03:49:29,140 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 [2023-08-04 03:49:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:49:29,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:49:29,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:49:29,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545013645] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:49:29,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:49:29,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-04 03:49:29,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085573373] [2023-08-04 03:49:29,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:49:29,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 03:49:29,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:49:29,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 03:49:29,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=21, Unknown=2, NotChecked=0, Total=42 [2023-08-04 03:49:29,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 269 [2023-08-04 03:49:29,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 32 transitions, 94 flow. Second operand has 7 states, 7 states have (on average 102.57142857142857) internal successors, (718), 7 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:29,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:49:29,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 269 [2023-08-04 03:49:29,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:49:29,528 INFO L124 PetriNetUnfolderBase]: 796/1392 cut-off events. [2023-08-04 03:49:29,528 INFO L125 PetriNetUnfolderBase]: For 988/988 co-relation queries the response was YES. [2023-08-04 03:49:29,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3277 conditions, 1392 events. 796/1392 cut-off events. For 988/988 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6804 event pairs, 316 based on Foata normal form. 16/1407 useless extension candidates. Maximal degree in co-relation 2471. Up to 1145 conditions per place. [2023-08-04 03:49:29,537 INFO L140 encePairwiseOnDemand]: 265/269 looper letters, 38 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2023-08-04 03:49:29,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 226 flow [2023-08-04 03:49:29,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:49:29,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:49:29,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 337 transitions. [2023-08-04 03:49:29,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41759603469640644 [2023-08-04 03:49:29,540 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 337 transitions. [2023-08-04 03:49:29,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 337 transitions. [2023-08-04 03:49:29,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:49:29,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 337 transitions. [2023-08-04 03:49:29,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:29,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:29,543 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:29,543 INFO L175 Difference]: Start difference. First operand has 43 places, 32 transitions, 94 flow. Second operand 3 states and 337 transitions. [2023-08-04 03:49:29,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 226 flow [2023-08-04 03:49:29,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 214 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 03:49:29,546 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 106 flow [2023-08-04 03:49:29,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-08-04 03:49:29,547 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -1 predicate places. [2023-08-04 03:49:29,547 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 106 flow [2023-08-04 03:49:29,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 102.57142857142857) internal successors, (718), 7 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:29,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:49:29,547 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:49:29,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 03:49:29,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:49:29,753 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:49:29,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:49:29,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1423239256, now seen corresponding path program 1 times [2023-08-04 03:49:29,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:49:29,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561811987] [2023-08-04 03:49:29,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:49:29,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:49:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:49:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:49:29,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:49:29,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561811987] [2023-08-04 03:49:29,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561811987] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:49:29,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373025152] [2023-08-04 03:49:29,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:49:29,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:49:29,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:49:29,881 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:49:29,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 03:49:29,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:49:29,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-04 03:49:29,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:49:30,007 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-08-04 03:49:30,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:49:30,048 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 [2023-08-04 03:49:30,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:49:30,059 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:49:30,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373025152] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:49:30,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:49:30,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-08-04 03:49:30,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803301167] [2023-08-04 03:49:30,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:49:30,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:49:30,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:49:30,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:49:30,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-04 03:49:30,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 269 [2023-08-04 03:49:30,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 117.4) internal successors, (587), 5 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:30,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:49:30,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 269 [2023-08-04 03:49:30,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:49:30,282 INFO L124 PetriNetUnfolderBase]: 319/668 cut-off events. [2023-08-04 03:49:30,282 INFO L125 PetriNetUnfolderBase]: For 522/522 co-relation queries the response was YES. [2023-08-04 03:49:30,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1657 conditions, 668 events. 319/668 cut-off events. For 522/522 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3064 event pairs, 99 based on Foata normal form. 146/813 useless extension candidates. Maximal degree in co-relation 880. Up to 422 conditions per place. [2023-08-04 03:49:30,285 INFO L140 encePairwiseOnDemand]: 259/269 looper letters, 28 selfloop transitions, 10 changer transitions 0/43 dead transitions. [2023-08-04 03:49:30,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 43 transitions, 217 flow [2023-08-04 03:49:30,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:49:30,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:49:30,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 499 transitions. [2023-08-04 03:49:30,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4637546468401487 [2023-08-04 03:49:30,287 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 499 transitions. [2023-08-04 03:49:30,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 499 transitions. [2023-08-04 03:49:30,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:49:30,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 499 transitions. [2023-08-04 03:49:30,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:30,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:30,291 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:30,291 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 106 flow. Second operand 4 states and 499 transitions. [2023-08-04 03:49:30,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 43 transitions, 217 flow [2023-08-04 03:49:30,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:49:30,293 INFO L231 Difference]: Finished difference. Result has 45 places, 34 transitions, 123 flow [2023-08-04 03:49:30,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=45, PETRI_TRANSITIONS=34} [2023-08-04 03:49:30,293 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2023-08-04 03:49:30,293 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 34 transitions, 123 flow [2023-08-04 03:49:30,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.4) internal successors, (587), 5 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:30,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:49:30,294 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:49:30,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 03:49:30,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:49:30,503 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:49:30,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:49:30,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1321131957, now seen corresponding path program 1 times [2023-08-04 03:49:30,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:49:30,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339593551] [2023-08-04 03:49:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:49:30,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:49:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:49:30,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:49:30,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:49:30,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339593551] [2023-08-04 03:49:30,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339593551] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:49:30,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589307531] [2023-08-04 03:49:30,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:49:30,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:49:30,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:49:30,635 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:49:30,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 03:49:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:49:30,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-04 03:49:30,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:49:30,747 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-08-04 03:49:30,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:49:30,776 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 [2023-08-04 03:49:30,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:49:30,798 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 [2023-08-04 03:49:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:49:30,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:49:30,833 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_147 (Array Int Int))) (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_147) |c_~#mutex1~0.base|) |c_~#mutex1~0.offset|) 0))) is different from false [2023-08-04 03:49:30,856 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:49:30,856 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2023-08-04 03:49:30,860 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2023-08-04 03:49:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:49:30,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589307531] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:49:30,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:49:30,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-04 03:49:30,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159545381] [2023-08-04 03:49:30,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:49:30,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-04 03:49:30,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:49:30,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-04 03:49:30,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=45, Unknown=1, NotChecked=14, Total=90 [2023-08-04 03:49:30,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 269 [2023-08-04 03:49:30,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 34 transitions, 123 flow. Second operand has 10 states, 10 states have (on average 105.1) internal successors, (1051), 10 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:30,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:49:30,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 269 [2023-08-04 03:49:30,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:49:30,988 INFO L124 PetriNetUnfolderBase]: 64/204 cut-off events. [2023-08-04 03:49:30,988 INFO L125 PetriNetUnfolderBase]: For 280/280 co-relation queries the response was YES. [2023-08-04 03:49:30,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563 conditions, 204 events. 64/204 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 753 event pairs, 6 based on Foata normal form. 74/278 useless extension candidates. Maximal degree in co-relation 440. Up to 155 conditions per place. [2023-08-04 03:49:30,989 INFO L140 encePairwiseOnDemand]: 263/269 looper letters, 27 selfloop transitions, 6 changer transitions 0/38 dead transitions. [2023-08-04 03:49:30,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 38 transitions, 210 flow [2023-08-04 03:49:30,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:49:30,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:49:30,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 440 transitions. [2023-08-04 03:49:30,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40892193308550184 [2023-08-04 03:49:30,991 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 440 transitions. [2023-08-04 03:49:30,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 440 transitions. [2023-08-04 03:49:30,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:49:30,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 440 transitions. [2023-08-04 03:49:30,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:30,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:30,994 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:30,994 INFO L175 Difference]: Start difference. First operand has 45 places, 34 transitions, 123 flow. Second operand 4 states and 440 transitions. [2023-08-04 03:49:30,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 38 transitions, 210 flow [2023-08-04 03:49:30,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 38 transitions, 190 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 03:49:30,996 INFO L231 Difference]: Finished difference. Result has 45 places, 34 transitions, 115 flow [2023-08-04 03:49:30,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=45, PETRI_TRANSITIONS=34} [2023-08-04 03:49:30,997 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2023-08-04 03:49:30,997 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 34 transitions, 115 flow [2023-08-04 03:49:30,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 105.1) internal successors, (1051), 10 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:30,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:49:30,998 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:49:31,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 03:49:31,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:49:31,204 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:49:31,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:49:31,205 INFO L85 PathProgramCache]: Analyzing trace with hash 579164632, now seen corresponding path program 1 times [2023-08-04 03:49:31,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:49:31,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92575040] [2023-08-04 03:49:31,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:49:31,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:49:31,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:49:31,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:49:31,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:49:31,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92575040] [2023-08-04 03:49:31,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92575040] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:49:31,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000587643] [2023-08-04 03:49:31,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:49:31,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:49:31,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:49:31,498 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:49:31,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 03:49:31,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:49:31,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-04 03:49:31,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:49:31,601 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 03:49:31,602 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 [2023-08-04 03:49:31,626 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 [2023-08-04 03:49:31,658 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 [2023-08-04 03:49:31,742 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-04 03:49:31,814 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-04 03:49:31,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:49:31,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:49:31,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:49:31,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000587643] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:49:31,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:49:31,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 16 [2023-08-04 03:49:31,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826912831] [2023-08-04 03:49:31,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:49:31,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-04 03:49:31,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:49:31,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-04 03:49:31,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=241, Unknown=5, NotChecked=0, Total=306 [2023-08-04 03:49:32,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 269 [2023-08-04 03:49:32,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 34 transitions, 115 flow. Second operand has 18 states, 18 states have (on average 97.77777777777777) internal successors, (1760), 18 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:32,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:49:32,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 269 [2023-08-04 03:49:32,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:49:32,465 INFO L124 PetriNetUnfolderBase]: 90/287 cut-off events. [2023-08-04 03:49:32,466 INFO L125 PetriNetUnfolderBase]: For 233/233 co-relation queries the response was YES. [2023-08-04 03:49:32,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 769 conditions, 287 events. 90/287 cut-off events. For 233/233 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1303 event pairs, 12 based on Foata normal form. 2/289 useless extension candidates. Maximal degree in co-relation 371. Up to 116 conditions per place. [2023-08-04 03:49:32,467 INFO L140 encePairwiseOnDemand]: 258/269 looper letters, 71 selfloop transitions, 20 changer transitions 6/102 dead transitions. [2023-08-04 03:49:32,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 102 transitions, 605 flow [2023-08-04 03:49:32,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-04 03:49:32,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-04 03:49:32,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1421 transitions. [2023-08-04 03:49:32,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37732342007434944 [2023-08-04 03:49:32,473 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1421 transitions. [2023-08-04 03:49:32,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1421 transitions. [2023-08-04 03:49:32,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:49:32,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1421 transitions. [2023-08-04 03:49:32,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 101.5) internal successors, (1421), 14 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:32,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 269.0) internal successors, (4035), 15 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:32,481 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 269.0) internal successors, (4035), 15 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:32,482 INFO L175 Difference]: Start difference. First operand has 45 places, 34 transitions, 115 flow. Second operand 14 states and 1421 transitions. [2023-08-04 03:49:32,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 102 transitions, 605 flow [2023-08-04 03:49:32,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 102 transitions, 590 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:49:32,485 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 243 flow [2023-08-04 03:49:32,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=243, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2023-08-04 03:49:32,485 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 17 predicate places. [2023-08-04 03:49:32,485 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 243 flow [2023-08-04 03:49:32,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 97.77777777777777) internal successors, (1760), 18 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:32,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:49:32,486 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:49:32,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 03:49:32,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:49:32,693 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:49:32,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:49:32,693 INFO L85 PathProgramCache]: Analyzing trace with hash -728387261, now seen corresponding path program 1 times [2023-08-04 03:49:32,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:49:32,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513076124] [2023-08-04 03:49:32,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:49:32,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:49:32,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:49:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:49:33,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:49:33,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513076124] [2023-08-04 03:49:33,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513076124] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:49:33,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102843236] [2023-08-04 03:49:33,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:49:33,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:49:33,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:49:33,053 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:49:33,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 03:49:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:49:33,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-04 03:49:33,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:49:33,171 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 03:49:33,171 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 [2023-08-04 03:49:33,194 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 [2023-08-04 03:49:33,227 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 [2023-08-04 03:49:33,330 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-04 03:49:33,401 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-04 03:49:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:49:33,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:49:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:49:33,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102843236] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:49:33,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:49:33,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 16 [2023-08-04 03:49:33,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871712190] [2023-08-04 03:49:33,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:49:33,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-04 03:49:33,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:49:33,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-04 03:49:33,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=240, Unknown=6, NotChecked=0, Total=306 [2023-08-04 03:49:34,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 269 [2023-08-04 03:49:34,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 243 flow. Second operand has 18 states, 18 states have (on average 97.77777777777777) internal successors, (1760), 18 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:34,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:49:34,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 269 [2023-08-04 03:49:34,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:49:34,358 INFO L124 PetriNetUnfolderBase]: 90/287 cut-off events. [2023-08-04 03:49:34,358 INFO L125 PetriNetUnfolderBase]: For 293/293 co-relation queries the response was YES. [2023-08-04 03:49:34,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 867 conditions, 287 events. 90/287 cut-off events. For 293/293 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1286 event pairs, 28 based on Foata normal form. 1/288 useless extension candidates. Maximal degree in co-relation 772. Up to 180 conditions per place. [2023-08-04 03:49:34,360 INFO L140 encePairwiseOnDemand]: 260/269 looper letters, 57 selfloop transitions, 9 changer transitions 4/75 dead transitions. [2023-08-04 03:49:34,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 75 transitions, 468 flow [2023-08-04 03:49:34,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-04 03:49:34,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-04 03:49:34,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 908 transitions. [2023-08-04 03:49:34,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3750516315572078 [2023-08-04 03:49:34,363 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 908 transitions. [2023-08-04 03:49:34,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 908 transitions. [2023-08-04 03:49:34,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:49:34,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 908 transitions. [2023-08-04 03:49:34,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 100.88888888888889) internal successors, (908), 9 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:34,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 269.0) internal successors, (2690), 10 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:34,369 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 269.0) internal successors, (2690), 10 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:34,369 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 243 flow. Second operand 9 states and 908 transitions. [2023-08-04 03:49:34,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 75 transitions, 468 flow [2023-08-04 03:49:34,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 75 transitions, 461 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 03:49:34,372 INFO L231 Difference]: Finished difference. Result has 74 places, 58 transitions, 290 flow [2023-08-04 03:49:34,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=290, PETRI_PLACES=74, PETRI_TRANSITIONS=58} [2023-08-04 03:49:34,373 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2023-08-04 03:49:34,373 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 58 transitions, 290 flow [2023-08-04 03:49:34,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 97.77777777777777) internal successors, (1760), 18 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:34,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:49:34,374 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:49:34,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 03:49:34,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:49:34,580 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:49:34,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:49:34,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1050458366, now seen corresponding path program 2 times [2023-08-04 03:49:34,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:49:34,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027824972] [2023-08-04 03:49:34,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:49:34,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:49:34,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:49:34,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:49:34,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:49:34,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027824972] [2023-08-04 03:49:34,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027824972] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:49:34,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623329733] [2023-08-04 03:49:34,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 03:49:34,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:49:34,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:49:34,885 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:49:34,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 03:49:34,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 03:49:34,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 03:49:34,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-04 03:49:34,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:49:34,994 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 03:49:34,995 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 [2023-08-04 03:49:35,025 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 [2023-08-04 03:49:35,131 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-04 03:49:35,211 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-04 03:49:35,236 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 [2023-08-04 03:49:35,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:49:35,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:49:35,288 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_321 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_321) |c_~#global~0.base|) |c_~#global~0.offset|) 0)) is different from false [2023-08-04 03:49:35,304 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_321 (Array Int Int))) (= (select (select (store (store |c_#memory_int| c_t_funThread1of2ForFork0_~p~0.base (store (select |c_#memory_int| c_t_funThread1of2ForFork0_~p~0.base) c_t_funThread1of2ForFork0_~p~0.offset (+ (- 1) |c_t_funThread1of2ForFork0_#t~mem8|))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_321) |c_~#global~0.base|) |c_~#global~0.offset|) 0)) is different from false [2023-08-04 03:49:35,390 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_321 (Array Int Int))) (= (select (select (store (store |c_#memory_int| c_t_funThread1of2ForFork0_~p~0.base (let ((.cse0 (select |c_#memory_int| c_t_funThread1of2ForFork0_~p~0.base))) (store .cse0 c_t_funThread1of2ForFork0_~p~0.offset (select .cse0 c_t_funThread1of2ForFork0_~p~0.offset)))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_321) |c_~#global~0.base|) |c_~#global~0.offset|) 0)) is different from false [2023-08-04 03:49:35,432 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_316 (Array Int Int)) (v_ArrVal_321 (Array Int Int))) (= (select (select (store (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_316))) (store .cse0 |c_~#global~0.base| (let ((.cse1 (select .cse0 |c_~#global~0.base|))) (store .cse1 |c_~#global~0.offset| (select .cse1 |c_~#global~0.offset|))))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_321) |c_~#global~0.base|) |c_~#global~0.offset|) 0)) is different from false [2023-08-04 03:49:35,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-08-04 03:49:35,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623329733] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:49:35,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:49:35,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 19 [2023-08-04 03:49:35,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538646169] [2023-08-04 03:49:35,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:49:35,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-04 03:49:35,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:49:35,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-04 03:49:35,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=209, Unknown=7, NotChecked=132, Total=420 [2023-08-04 03:49:35,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 269 [2023-08-04 03:49:35,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 58 transitions, 290 flow. Second operand has 21 states, 21 states have (on average 97.47619047619048) internal successors, (2047), 21 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:35,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:49:35,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 269 [2023-08-04 03:49:35,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:49:35,833 INFO L124 PetriNetUnfolderBase]: 90/287 cut-off events. [2023-08-04 03:49:35,833 INFO L125 PetriNetUnfolderBase]: For 315/315 co-relation queries the response was YES. [2023-08-04 03:49:35,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 921 conditions, 287 events. 90/287 cut-off events. For 315/315 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1281 event pairs, 14 based on Foata normal form. 1/288 useless extension candidates. Maximal degree in co-relation 820. Up to 92 conditions per place. [2023-08-04 03:49:35,835 INFO L140 encePairwiseOnDemand]: 259/269 looper letters, 59 selfloop transitions, 19 changer transitions 4/87 dead transitions. [2023-08-04 03:49:35,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 87 transitions, 598 flow [2023-08-04 03:49:35,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-04 03:49:35,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-04 03:49:35,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 918 transitions. [2023-08-04 03:49:35,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.379182156133829 [2023-08-04 03:49:35,838 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 918 transitions. [2023-08-04 03:49:35,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 918 transitions. [2023-08-04 03:49:35,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:49:35,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 918 transitions. [2023-08-04 03:49:35,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 102.0) internal successors, (918), 9 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:35,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 269.0) internal successors, (2690), 10 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:35,845 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 269.0) internal successors, (2690), 10 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:35,845 INFO L175 Difference]: Start difference. First operand has 74 places, 58 transitions, 290 flow. Second operand 9 states and 918 transitions. [2023-08-04 03:49:35,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 87 transitions, 598 flow [2023-08-04 03:49:35,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 87 transitions, 593 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 03:49:35,850 INFO L231 Difference]: Finished difference. Result has 85 places, 61 transitions, 368 flow [2023-08-04 03:49:35,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=368, PETRI_PLACES=85, PETRI_TRANSITIONS=61} [2023-08-04 03:49:35,851 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 41 predicate places. [2023-08-04 03:49:35,851 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 61 transitions, 368 flow [2023-08-04 03:49:35,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 97.47619047619048) internal successors, (2047), 21 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:35,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:49:35,854 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:49:35,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 03:49:36,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 03:49:36,063 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:49:36,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:49:36,064 INFO L85 PathProgramCache]: Analyzing trace with hash 255300259, now seen corresponding path program 1 times [2023-08-04 03:49:36,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:49:36,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724849038] [2023-08-04 03:49:36,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:49:36,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:49:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:49:36,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:49:36,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:49:36,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724849038] [2023-08-04 03:49:36,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724849038] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:49:36,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483508546] [2023-08-04 03:49:36,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:49:36,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:49:36,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:49:36,587 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:49:36,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 03:49:36,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:49:36,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-04 03:49:36,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:49:36,720 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 03:49:36,721 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 [2023-08-04 03:49:36,744 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 [2023-08-04 03:49:36,772 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 [2023-08-04 03:49:36,885 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-04 03:49:36,962 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-04 03:49:37,074 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-04 03:49:37,174 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-04 03:49:37,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:49:37,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:49:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:49:37,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483508546] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:49:37,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:49:37,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 27 [2023-08-04 03:49:37,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439628572] [2023-08-04 03:49:37,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:49:37,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-04 03:49:37,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:49:37,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-04 03:49:37,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=699, Unknown=10, NotChecked=0, Total=812 [2023-08-04 03:49:38,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 269 [2023-08-04 03:49:38,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 61 transitions, 368 flow. Second operand has 29 states, 29 states have (on average 93.58620689655173) internal successors, (2714), 29 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:38,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:49:38,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 269 [2023-08-04 03:49:38,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:49:39,508 INFO L124 PetriNetUnfolderBase]: 98/327 cut-off events. [2023-08-04 03:49:39,509 INFO L125 PetriNetUnfolderBase]: For 544/544 co-relation queries the response was YES. [2023-08-04 03:49:39,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1140 conditions, 327 events. 98/327 cut-off events. For 544/544 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1547 event pairs, 13 based on Foata normal form. 2/329 useless extension candidates. Maximal degree in co-relation 998. Up to 76 conditions per place. [2023-08-04 03:49:39,511 INFO L140 encePairwiseOnDemand]: 253/269 looper letters, 34 selfloop transitions, 14 changer transitions 94/147 dead transitions. [2023-08-04 03:49:39,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 147 transitions, 1054 flow [2023-08-04 03:49:39,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-04 03:49:39,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-04 03:49:39,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3230 transitions. [2023-08-04 03:49:39,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35315985130111527 [2023-08-04 03:49:39,521 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3230 transitions. [2023-08-04 03:49:39,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3230 transitions. [2023-08-04 03:49:39,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:49:39,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3230 transitions. [2023-08-04 03:49:39,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 95.0) internal successors, (3230), 34 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:39,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 269.0) internal successors, (9415), 35 states have internal predecessors, (9415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:39,543 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 269.0) internal successors, (9415), 35 states have internal predecessors, (9415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:39,543 INFO L175 Difference]: Start difference. First operand has 85 places, 61 transitions, 368 flow. Second operand 34 states and 3230 transitions. [2023-08-04 03:49:39,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 147 transitions, 1054 flow [2023-08-04 03:49:39,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 147 transitions, 1030 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-04 03:49:39,548 INFO L231 Difference]: Finished difference. Result has 122 places, 41 transitions, 280 flow [2023-08-04 03:49:39,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=280, PETRI_PLACES=122, PETRI_TRANSITIONS=41} [2023-08-04 03:49:39,549 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 78 predicate places. [2023-08-04 03:49:39,549 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 41 transitions, 280 flow [2023-08-04 03:49:39,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 93.58620689655173) internal successors, (2714), 29 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:39,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:49:39,551 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:49:39,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-04 03:49:39,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:49:39,756 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:49:39,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:49:39,756 INFO L85 PathProgramCache]: Analyzing trace with hash -2139541925, now seen corresponding path program 2 times [2023-08-04 03:49:39,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:49:39,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845404394] [2023-08-04 03:49:39,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:49:39,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:49:39,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:49:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:49:40,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:49:40,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845404394] [2023-08-04 03:49:40,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845404394] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:49:40,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996536830] [2023-08-04 03:49:40,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 03:49:40,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:49:40,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:49:40,261 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:49:40,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 03:49:40,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 03:49:40,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 03:49:40,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-04 03:49:40,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:49:40,396 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 03:49:40,396 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 [2023-08-04 03:49:40,423 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 [2023-08-04 03:49:40,568 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-04 03:49:40,657 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-04 03:49:40,678 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 [2023-08-04 03:49:40,790 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-04 03:49:40,863 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-04 03:49:40,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:49:40,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:49:41,072 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_505 (Array Int Int))) (= (select (select (store (store |c_#memory_int| c_t_funThread1of2ForFork0_~p~0.base (store (select |c_#memory_int| c_t_funThread1of2ForFork0_~p~0.base) c_t_funThread1of2ForFork0_~p~0.offset |c_t_funThread1of2ForFork0_#t~mem5|)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_505) |c_~#global~0.base|) |c_~#global~0.offset|) 0)) is different from false [2023-08-04 03:49:41,078 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_505 (Array Int Int))) (= (select (select (store (store |c_#memory_int| c_t_funThread1of2ForFork0_~p~0.base (let ((.cse0 (select |c_#memory_int| c_t_funThread1of2ForFork0_~p~0.base))) (store .cse0 c_t_funThread1of2ForFork0_~p~0.offset (select .cse0 c_t_funThread1of2ForFork0_~p~0.offset)))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_505) |c_~#global~0.base|) |c_~#global~0.offset|) 0)) is different from false [2023-08-04 03:49:41,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:49:41,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996536830] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:49:41,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:49:41,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 28 [2023-08-04 03:49:41,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627282438] [2023-08-04 03:49:41,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:49:41,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-04 03:49:41,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:49:41,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-04 03:49:41,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=636, Unknown=17, NotChecked=106, Total=870 [2023-08-04 03:49:41,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 269 [2023-08-04 03:49:41,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 41 transitions, 280 flow. Second operand has 30 states, 30 states have (on average 93.56666666666666) internal successors, (2807), 30 states have internal predecessors, (2807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:41,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:49:41,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 269 [2023-08-04 03:49:41,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:49:41,533 INFO L124 PetriNetUnfolderBase]: 52/172 cut-off events. [2023-08-04 03:49:41,534 INFO L125 PetriNetUnfolderBase]: For 394/394 co-relation queries the response was YES. [2023-08-04 03:49:41,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 723 conditions, 172 events. 52/172 cut-off events. For 394/394 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 580 event pairs, 3 based on Foata normal form. 1/173 useless extension candidates. Maximal degree in co-relation 692. Up to 51 conditions per place. [2023-08-04 03:49:41,535 INFO L140 encePairwiseOnDemand]: 254/269 looper letters, 0 selfloop transitions, 0 changer transitions 67/67 dead transitions. [2023-08-04 03:49:41,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 67 transitions, 537 flow [2023-08-04 03:49:41,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-04 03:49:41,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-04 03:49:41,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1325 transitions. [2023-08-04 03:49:41,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3518321826872013 [2023-08-04 03:49:41,540 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1325 transitions. [2023-08-04 03:49:41,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1325 transitions. [2023-08-04 03:49:41,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:49:41,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1325 transitions. [2023-08-04 03:49:41,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 94.64285714285714) internal successors, (1325), 14 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:41,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 269.0) internal successors, (4035), 15 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:41,558 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 269.0) internal successors, (4035), 15 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:41,558 INFO L175 Difference]: Start difference. First operand has 122 places, 41 transitions, 280 flow. Second operand 14 states and 1325 transitions. [2023-08-04 03:49:41,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 67 transitions, 537 flow [2023-08-04 03:49:41,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 67 transitions, 426 flow, removed 15 selfloop flow, removed 39 redundant places. [2023-08-04 03:49:41,562 INFO L231 Difference]: Finished difference. Result has 65 places, 0 transitions, 0 flow [2023-08-04 03:49:41,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=0, PETRI_PLACES=65, PETRI_TRANSITIONS=0} [2023-08-04 03:49:41,562 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2023-08-04 03:49:41,562 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 0 transitions, 0 flow [2023-08-04 03:49:41,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 93.56666666666666) internal successors, (2807), 30 states have internal predecessors, (2807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:41,563 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 03:49:41,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 03:49:41,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 03:49:41,773 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 03:49:41,774 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 03:49:41,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 152 transitions, 322 flow [2023-08-04 03:49:41,793 INFO L124 PetriNetUnfolderBase]: 31/246 cut-off events. [2023-08-04 03:49:41,793 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 03:49:41,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 246 events. 31/246 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 717 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 154. Up to 8 conditions per place. [2023-08-04 03:49:41,794 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 152 transitions, 322 flow [2023-08-04 03:49:41,796 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 152 transitions, 322 flow [2023-08-04 03:49:41,796 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:49:41,796 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 138 places, 152 transitions, 322 flow [2023-08-04 03:49:41,797 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 138 places, 152 transitions, 322 flow [2023-08-04 03:49:41,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 152 transitions, 322 flow [2023-08-04 03:49:41,812 INFO L124 PetriNetUnfolderBase]: 31/246 cut-off events. [2023-08-04 03:49:41,812 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 03:49:41,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 246 events. 31/246 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 717 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 154. Up to 8 conditions per place. [2023-08-04 03:49:41,817 INFO L119 LiptonReduction]: Number of co-enabled transitions 8316 [2023-08-04 03:49:44,465 INFO L134 LiptonReduction]: Checked pairs total: 18331 [2023-08-04 03:49:44,465 INFO L136 LiptonReduction]: Total number of compositions: 117 [2023-08-04 03:49:44,467 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:49:44,467 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=true, 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;@643b2f1d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:49:44,468 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:49:44,473 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:49:44,473 INFO L124 PetriNetUnfolderBase]: 10/54 cut-off events. [2023-08-04 03:49:44,473 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 03:49:44,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:49:44,473 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 03:49:44,473 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:49:44,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:49:44,473 INFO L85 PathProgramCache]: Analyzing trace with hash 174623039, now seen corresponding path program 1 times [2023-08-04 03:49:44,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:49:44,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945049997] [2023-08-04 03:49:44,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:49:44,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:49:44,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:49:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:49:44,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:49:44,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945049997] [2023-08-04 03:49:44,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945049997] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:49:44,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074840652] [2023-08-04 03:49:44,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:49:44,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:49:44,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:49:44,513 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:49:44,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 03:49:44,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:49:44,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:49:44,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:49:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:49:44,618 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:49:44,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074840652] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:49:44,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:49:44,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 03:49:44,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179245527] [2023-08-04 03:49:44,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:49:44,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:49:44,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:49:44,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:49:44,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:49:44,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 269 [2023-08-04 03:49:44,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 55 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 126.6) internal successors, (633), 5 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:44,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:49:44,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 269 [2023-08-04 03:49:44,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:49:44,827 INFO L124 PetriNetUnfolderBase]: 1499/2523 cut-off events. [2023-08-04 03:49:44,828 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2023-08-04 03:49:44,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5040 conditions, 2523 events. 1499/2523 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 15031 event pairs, 0 based on Foata normal form. 392/2713 useless extension candidates. Maximal degree in co-relation 515. Up to 2266 conditions per place. [2023-08-04 03:49:44,833 INFO L140 encePairwiseOnDemand]: 251/269 looper letters, 0 selfloop transitions, 0 changer transitions 68/68 dead transitions. [2023-08-04 03:49:44,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 68 transitions, 270 flow [2023-08-04 03:49:44,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:49:44,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:49:44,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 718 transitions. [2023-08-04 03:49:44,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338289962825279 [2023-08-04 03:49:44,835 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 718 transitions. [2023-08-04 03:49:44,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 718 transitions. [2023-08-04 03:49:44,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:49:44,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 718 transitions. [2023-08-04 03:49:44,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:44,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 269.0) internal successors, (1614), 6 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:44,839 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 269.0) internal successors, (1614), 6 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:44,839 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 128 flow. Second operand 5 states and 718 transitions. [2023-08-04 03:49:44,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 68 transitions, 270 flow [2023-08-04 03:49:44,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 68 transitions, 266 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:49:44,840 INFO L231 Difference]: Finished difference. Result has 45 places, 0 transitions, 0 flow [2023-08-04 03:49:44,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=45, PETRI_TRANSITIONS=0} [2023-08-04 03:49:44,841 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2023-08-04 03:49:44,841 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 0 transitions, 0 flow [2023-08-04 03:49:44,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.6) internal successors, (633), 5 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:49:44,841 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-04 03:49:44,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 03:49:45,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 03:49:45,046 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 03:49:45,047 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (2/2) [2023-08-04 03:49:45,047 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 03:49:45,047 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 03:49:45,052 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 03:49:45 BasicIcfg [2023-08-04 03:49:45,052 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 03:49:45,052 INFO L158 Benchmark]: Toolchain (without parser) took 28143.25ms. Allocated memory was 482.3MB in the beginning and 696.3MB in the end (delta: 213.9MB). Free memory was 433.3MB in the beginning and 491.8MB in the end (delta: -58.5MB). Peak memory consumption was 158.7MB. Max. memory is 16.0GB. [2023-08-04 03:49:45,052 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 358.6MB. Free memory is still 312.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 03:49:45,053 INFO L158 Benchmark]: CACSL2BoogieTranslator took 499.04ms. Allocated memory is still 482.3MB. Free memory was 433.0MB in the beginning and 413.1MB in the end (delta: 19.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-04 03:49:45,053 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.13ms. Allocated memory is still 482.3MB. Free memory was 413.1MB in the beginning and 410.9MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 03:49:45,053 INFO L158 Benchmark]: Boogie Preprocessor took 44.15ms. Allocated memory is still 482.3MB. Free memory was 410.9MB in the beginning and 409.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 03:49:45,053 INFO L158 Benchmark]: RCFGBuilder took 517.11ms. Allocated memory is still 482.3MB. Free memory was 409.3MB in the beginning and 442.2MB in the end (delta: -32.9MB). Peak memory consumption was 15.9MB. Max. memory is 16.0GB. [2023-08-04 03:49:45,053 INFO L158 Benchmark]: TraceAbstraction took 27034.05ms. Allocated memory was 482.3MB in the beginning and 696.3MB in the end (delta: 213.9MB). Free memory was 441.6MB in the beginning and 491.8MB in the end (delta: -50.2MB). Peak memory consumption was 165.8MB. Max. memory is 16.0GB. [2023-08-04 03:49:45,054 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 358.6MB. Free memory is still 312.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 499.04ms. Allocated memory is still 482.3MB. Free memory was 433.0MB in the beginning and 413.1MB in the end (delta: 19.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 42.13ms. Allocated memory is still 482.3MB. Free memory was 413.1MB in the beginning and 410.9MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 44.15ms. Allocated memory is still 482.3MB. Free memory was 410.9MB in the beginning and 409.4MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 517.11ms. Allocated memory is still 482.3MB. Free memory was 409.3MB in the beginning and 442.2MB in the end (delta: -32.9MB). Peak memory consumption was 15.9MB. Max. memory is 16.0GB. * TraceAbstraction took 27034.05ms. Allocated memory was 482.3MB in the beginning and 696.3MB in the end (delta: 213.9MB). Free memory was 441.6MB in the beginning and 491.8MB in the end (delta: -50.2MB). Peak memory consumption was 165.8MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 244]: Unsoundness Warning unspecified type, defaulting to int C: short [244] - GenericResultAtLocation [Line: 244]: Unsoundness Warning unspecified type, defaulting to int C: short [244] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.0s, 104 PlacesBefore, 27 PlacesAfterwards, 112 TransitionsBefore, 32 TransitionsAfterwards, 2706 CoEnabledTransitionPairs, 6 FixpointIterations, 36 TrivialSequentialCompositions, 47 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 3 ChoiceCompositions, 95 TotalNumberOfCompositions, 4811 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2467, independent: 2302, independent conditional: 0, independent unconditional: 2302, dependent: 165, dependent conditional: 0, dependent unconditional: 165, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1445, independent: 1405, independent conditional: 0, independent unconditional: 1405, dependent: 40, dependent conditional: 0, dependent unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2467, independent: 897, independent conditional: 0, independent unconditional: 897, dependent: 125, dependent conditional: 0, dependent unconditional: 125, unknown: 1445, unknown conditional: 0, unknown unconditional: 1445] , Statistics on independence cache: Total cache size (in pairs): 82, Positive cache size: 62, Positive conditional cache size: 0, Positive unconditional cache size: 62, Negative cache size: 20, Negative conditional cache size: 0, Negative unconditional cache size: 20, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.7s, 104 PlacesBefore, 27 PlacesAfterwards, 112 TransitionsBefore, 32 TransitionsAfterwards, 2706 CoEnabledTransitionPairs, 6 FixpointIterations, 36 TrivialSequentialCompositions, 47 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 3 ChoiceCompositions, 95 TotalNumberOfCompositions, 4759 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2690, independent: 2527, independent conditional: 0, independent unconditional: 2527, dependent: 163, dependent conditional: 0, dependent unconditional: 163, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1449, independent: 1412, independent conditional: 0, independent unconditional: 1412, dependent: 37, dependent conditional: 0, dependent unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2690, independent: 1115, independent conditional: 0, independent unconditional: 1115, dependent: 126, dependent conditional: 0, dependent unconditional: 126, unknown: 1449, unknown conditional: 0, unknown unconditional: 1449] , Statistics on independence cache: Total cache size (in pairs): 84, Positive cache size: 69, Positive conditional cache size: 0, Positive unconditional cache size: 69, Negative cache size: 15, Negative conditional cache size: 0, Negative unconditional cache size: 15, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.8s, 138 PlacesBefore, 44 PlacesAfterwards, 152 TransitionsBefore, 55 TransitionsAfterwards, 8316 CoEnabledTransitionPairs, 6 FixpointIterations, 36 TrivialSequentialCompositions, 61 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 17 ConcurrentYvCompositions, 3 ChoiceCompositions, 117 TotalNumberOfCompositions, 16685 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7286, independent: 7011, independent conditional: 0, independent unconditional: 7011, dependent: 275, dependent conditional: 0, dependent unconditional: 275, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4053, independent: 3988, independent conditional: 0, independent unconditional: 3988, dependent: 65, dependent conditional: 0, dependent unconditional: 65, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7286, independent: 3023, independent conditional: 0, independent unconditional: 3023, dependent: 210, dependent conditional: 0, dependent unconditional: 210, unknown: 4053, unknown conditional: 0, unknown unconditional: 4053] , Statistics on independence cache: Total cache size (in pairs): 248, Positive cache size: 222, Positive conditional cache size: 0, Positive unconditional cache size: 222, Negative cache size: 26, Negative conditional cache size: 0, Negative unconditional cache size: 26, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.7s, 138 PlacesBefore, 44 PlacesAfterwards, 152 TransitionsBefore, 55 TransitionsAfterwards, 8316 CoEnabledTransitionPairs, 7 FixpointIterations, 36 TrivialSequentialCompositions, 61 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 17 ConcurrentYvCompositions, 3 ChoiceCompositions, 117 TotalNumberOfCompositions, 18331 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7062, independent: 6742, independent conditional: 0, independent unconditional: 6742, dependent: 320, dependent conditional: 0, dependent unconditional: 320, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3960, independent: 3905, independent conditional: 0, independent unconditional: 3905, dependent: 55, dependent conditional: 0, dependent unconditional: 55, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7062, independent: 2837, independent conditional: 0, independent unconditional: 2837, dependent: 265, dependent conditional: 0, dependent unconditional: 265, unknown: 3960, unknown conditional: 0, unknown unconditional: 3960] , Statistics on independence cache: Total cache size (in pairs): 156, Positive cache size: 129, Positive conditional cache size: 0, Positive unconditional cache size: 129, Negative cache size: 27, Negative conditional cache size: 0, Negative unconditional cache size: 27, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 691]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 134 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.1s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 73 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 54 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 97 IncrementalHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 0 mSDtfsCounter, 97 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=0, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 47 SizeOfPredicates, 0 NumberOfNonLiveVariables, 129 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 4 procedures, 162 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 16.8s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.8s, HoareTripleCheckerStatistics: 89 mSolverCounterUnknown, 1722 SdHoareTripleChecker+Valid, 3.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1480 mSDsluCounter, 1227 SdHoareTripleChecker+Invalid, 3.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 420 IncrementalHoareTripleChecker+Unchecked, 1217 mSDsCounter, 205 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6826 IncrementalHoareTripleChecker+Invalid, 7540 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 205 mSolverCounterUnsat, 10 mSDtfsCounter, 6826 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 466 GetRequests, 282 SyntacticMatches, 16 SemanticMatches, 168 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=368occurred in iteration=8, InterpolantAutomatonStates: 98, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.4s InterpolantComputationTime, 388 NumberOfCodeBlocks, 388 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 536 ConstructedInterpolants, 57 QuantifiedInterpolants, 6601 SizeOfPredicates, 46 NumberOfNonLiveVariables, 1797 ConjunctsInSsa, 274 ConjunctsInUnsatCore, 27 InterpolantComputations, 2 PerfectInterpolantSequences, 27/141 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 3 procedures, 134 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.8s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.7s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 4 procedures, 162 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.3s, OverallIterations: 1, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 74 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 65 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 122 IncrementalHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 0 mSDtfsCounter, 122 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=128occurred in iteration=0, InterpolantAutomatonStates: 5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 56 SizeOfPredicates, 0 NumberOfNonLiveVariables, 137 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 11/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-04 03:49:45,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...