/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 TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_36-indirect_racefree_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 15:18:01,657 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 15:18:01,726 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 15:18:01,731 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 15:18:01,731 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 15:18:01,732 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 15:18:01,732 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 15:18:01,765 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 15:18:01,766 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 15:18:01,771 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 15:18:01,771 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 15:18:01,772 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 15:18:01,772 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 15:18:01,773 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 15:18:01,773 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 15:18:01,773 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 15:18:01,773 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 15:18:01,774 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 15:18:01,774 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 15:18:01,774 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 15:18:01,774 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 15:18:01,775 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 15:18:01,775 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 15:18:01,776 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 15:18:01,776 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 15:18:01,776 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 15:18:01,776 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 15:18:01,777 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 15:18:01,777 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 15:18:01,777 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 15:18:01,778 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 15:18:01,778 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 15:18:01,778 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 15:18:01,778 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 15:18:01,779 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 15:18:01,779 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 15:18:01,779 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 15:18:01,779 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 15:18:01,779 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 15:18:01,779 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 15:18:01,779 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 15:18:01,780 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 15:18:01,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 15:18:01,993 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 15:18:01,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 15:18:01,996 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 15:18:01,996 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 15:18:01,997 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_36-indirect_racefree_bound2.i [2023-08-03 15:18:03,114 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 15:18:03,286 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 15:18:03,286 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_36-indirect_racefree_bound2.i [2023-08-03 15:18:03,302 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07c814b79/becfc6e791a04f41818870ff4cbffedf/FLAG0ffe7db8e [2023-08-03 15:18:03,319 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07c814b79/becfc6e791a04f41818870ff4cbffedf [2023-08-03 15:18:03,323 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 15:18:03,327 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 15:18:03,328 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 15:18:03,328 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 15:18:03,331 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 15:18:03,331 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 03:18:03" (1/1) ... [2023-08-03 15:18:03,332 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12255d96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:18:03, skipping insertion in model container [2023-08-03 15:18:03,332 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 03:18:03" (1/1) ... [2023-08-03 15:18:03,382 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 15:18:03,715 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_36-indirect_racefree_bound2.i[30176,30189] [2023-08-03 15:18:03,731 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 15:18:03,745 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 15:18:03,775 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-03 15:18:03,783 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-03 15:18:03,792 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_36-indirect_racefree_bound2.i[30176,30189] [2023-08-03 15:18:03,801 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 15:18:03,841 INFO L206 MainTranslator]: Completed translation [2023-08-03 15:18:03,842 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:18:03 WrapperNode [2023-08-03 15:18:03,842 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 15:18:03,843 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 15:18:03,843 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 15:18:03,843 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 15:18:03,849 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:18:03" (1/1) ... [2023-08-03 15:18:03,875 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:18:03" (1/1) ... [2023-08-03 15:18:03,900 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2023-08-03 15:18:03,901 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 15:18:03,901 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 15:18:03,901 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 15:18:03,901 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 15:18:03,908 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:18:03" (1/1) ... [2023-08-03 15:18:03,908 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:18:03" (1/1) ... [2023-08-03 15:18:03,916 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:18:03" (1/1) ... [2023-08-03 15:18:03,916 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:18:03" (1/1) ... [2023-08-03 15:18:03,927 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:18:03" (1/1) ... [2023-08-03 15:18:03,930 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:18:03" (1/1) ... [2023-08-03 15:18:03,931 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:18:03" (1/1) ... [2023-08-03 15:18:03,932 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:18:03" (1/1) ... [2023-08-03 15:18:03,934 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 15:18:03,935 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 15:18:03,935 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 15:18:03,935 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 15:18:03,936 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:18:03" (1/1) ... [2023-08-03 15:18:03,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 15:18:03,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:18:03,970 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) [2023-08-03 15:18:03,982 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 [2023-08-03 15:18:04,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 15:18:04,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 15:18:04,012 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 15:18:04,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 15:18:04,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 15:18:04,013 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-03 15:18:04,013 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-03 15:18:04,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 15:18:04,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 15:18:04,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 15:18:04,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 15:18:04,016 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 15:18:04,115 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 15:18:04,117 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 15:18:04,278 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 15:18:04,284 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 15:18:04,284 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-03 15:18:04,286 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 03:18:04 BoogieIcfgContainer [2023-08-03 15:18:04,286 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 15:18:04,288 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 15:18:04,288 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 15:18:04,291 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 15:18:04,291 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 03:18:03" (1/3) ... [2023-08-03 15:18:04,292 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f421719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 03:18:04, skipping insertion in model container [2023-08-03 15:18:04,292 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:18:03" (2/3) ... [2023-08-03 15:18:04,292 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f421719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 03:18:04, skipping insertion in model container [2023-08-03 15:18:04,292 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 03:18:04" (3/3) ... [2023-08-03 15:18:04,293 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_28-race_reach_36-indirect_racefree_bound2.i [2023-08-03 15:18:04,300 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 15:18:04,307 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 15:18:04,307 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 15:18:04,307 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 15:18:04,353 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-03 15:18:04,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 111 transitions, 230 flow [2023-08-03 15:18:04,483 INFO L124 PetriNetUnfolderBase]: 17/146 cut-off events. [2023-08-03 15:18:04,484 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 15:18:04,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 146 events. 17/146 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 345 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 72. Up to 4 conditions per place. [2023-08-03 15:18:04,489 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 111 transitions, 230 flow [2023-08-03 15:18:04,495 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 106 transitions, 217 flow [2023-08-03 15:18:04,498 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 15:18:04,509 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 98 places, 106 transitions, 217 flow [2023-08-03 15:18:04,516 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 98 places, 106 transitions, 217 flow [2023-08-03 15:18:04,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 106 transitions, 217 flow [2023-08-03 15:18:04,565 INFO L124 PetriNetUnfolderBase]: 16/141 cut-off events. [2023-08-03 15:18:04,566 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 15:18:04,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 141 events. 16/141 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 334 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 72. Up to 4 conditions per place. [2023-08-03 15:18:04,568 INFO L119 LiptonReduction]: Number of co-enabled transitions 2624 [2023-08-03 15:18:07,441 INFO L134 LiptonReduction]: Checked pairs total: 5236 [2023-08-03 15:18:07,441 INFO L136 LiptonReduction]: Total number of compositions: 89 [2023-08-03 15:18:07,452 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 15:18:07,458 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;@25eddf5f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 15:18:07,458 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 15:18:07,462 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 15:18:07,462 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2023-08-03 15:18:07,462 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 15:18:07,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:18:07,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 15:18:07,463 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 15:18:07,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:18:07,467 INFO L85 PathProgramCache]: Analyzing trace with hash 13124765, now seen corresponding path program 1 times [2023-08-03 15:18:07,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:18:07,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642958083] [2023-08-03 15:18:07,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:07,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:18:07,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:07,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:18:07,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:18:07,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642958083] [2023-08-03 15:18:07,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642958083] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:18:07,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 15:18:07,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 15:18:07,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742226838] [2023-08-03 15:18:07,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:18:07,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 15:18:07,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:18:07,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 15:18:07,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 15:18:07,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 200 [2023-08-03 15:18:07,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 32 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:07,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:18:07,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 200 [2023-08-03 15:18:07,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:18:07,807 INFO L124 PetriNetUnfolderBase]: 80/204 cut-off events. [2023-08-03 15:18:07,807 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 15:18:07,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 204 events. 80/204 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 872 event pairs, 0 based on Foata normal form. 9/191 useless extension candidates. Maximal degree in co-relation 368. Up to 169 conditions per place. [2023-08-03 15:18:07,812 INFO L140 encePairwiseOnDemand]: 188/200 looper letters, 26 selfloop transitions, 2 changer transitions 4/34 dead transitions. [2023-08-03 15:18:07,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 135 flow [2023-08-03 15:18:07,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 15:18:07,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 15:18:07,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 326 transitions. [2023-08-03 15:18:07,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5433333333333333 [2023-08-03 15:18:07,832 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 326 transitions. [2023-08-03 15:18:07,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 326 transitions. [2023-08-03 15:18:07,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:18:07,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 326 transitions. [2023-08-03 15:18:07,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:07,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:07,846 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:07,848 INFO L175 Difference]: Start difference. First operand has 27 places, 32 transitions, 69 flow. Second operand 3 states and 326 transitions. [2023-08-03 15:18:07,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 135 flow [2023-08-03 15:18:07,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 135 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 15:18:07,851 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 51 flow [2023-08-03 15:18:07,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, 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=51, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2023-08-03 15:18:07,856 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-08-03 15:18:07,856 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 51 flow [2023-08-03 15:18:07,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:07,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:18:07,856 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 15:18:07,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 15:18:07,857 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 15:18:07,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:18:07,857 INFO L85 PathProgramCache]: Analyzing trace with hash -276705489, now seen corresponding path program 1 times [2023-08-03 15:18:07,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:18:07,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865337525] [2023-08-03 15:18:07,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:07,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:18:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 15:18:07,898 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 15:18:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 15:18:07,954 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 15:18:07,954 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 15:18:07,955 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-03 15:18:07,957 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-03 15:18:07,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 15:18:07,957 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 15:18:07,960 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 15:18:07,960 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 15:18:07,985 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-03 15:18:07,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 145 transitions, 308 flow [2023-08-03 15:18:08,011 INFO L124 PetriNetUnfolderBase]: 31/239 cut-off events. [2023-08-03 15:18:08,011 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 15:18:08,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 239 events. 31/239 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 711 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 148. Up to 8 conditions per place. [2023-08-03 15:18:08,014 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 145 transitions, 308 flow [2023-08-03 15:18:08,015 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 131 places, 145 transitions, 308 flow [2023-08-03 15:18:08,016 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 15:18:08,016 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 131 places, 145 transitions, 308 flow [2023-08-03 15:18:08,016 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 131 places, 145 transitions, 308 flow [2023-08-03 15:18:08,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 145 transitions, 308 flow [2023-08-03 15:18:08,040 INFO L124 PetriNetUnfolderBase]: 31/239 cut-off events. [2023-08-03 15:18:08,042 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 15:18:08,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 239 events. 31/239 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 711 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 148. Up to 8 conditions per place. [2023-08-03 15:18:08,049 INFO L119 LiptonReduction]: Number of co-enabled transitions 8000 [2023-08-03 15:18:10,600 INFO L134 LiptonReduction]: Checked pairs total: 16190 [2023-08-03 15:18:10,600 INFO L136 LiptonReduction]: Total number of compositions: 110 [2023-08-03 15:18:10,602 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 15:18:10,603 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;@25eddf5f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 15:18:10,603 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 15:18:10,605 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 15:18:10,605 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-08-03 15:18:10,605 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 15:18:10,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:18:10,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 15:18:10,606 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 15:18:10,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:18:10,606 INFO L85 PathProgramCache]: Analyzing trace with hash 22020036, now seen corresponding path program 1 times [2023-08-03 15:18:10,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:18:10,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329715419] [2023-08-03 15:18:10,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:10,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:18:10,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:10,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:18:10,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:18:10,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329715419] [2023-08-03 15:18:10,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329715419] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:18:10,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 15:18:10,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 15:18:10,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962084379] [2023-08-03 15:18:10,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:18:10,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 15:18:10,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:18:10,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 15:18:10,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 15:18:10,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 255 [2023-08-03 15:18:10,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:10,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:18:10,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 255 [2023-08-03 15:18:10,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:18:10,974 INFO L124 PetriNetUnfolderBase]: 1642/2949 cut-off events. [2023-08-03 15:18:10,974 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-03 15:18:10,977 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 17595 event pairs, 752 based on Foata normal form. 428/3079 useless extension candidates. Maximal degree in co-relation 589. Up to 2673 conditions per place. [2023-08-03 15:18:10,984 INFO L140 encePairwiseOnDemand]: 238/255 looper letters, 32 selfloop transitions, 2 changer transitions 9/51 dead transitions. [2023-08-03 15:18:10,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 204 flow [2023-08-03 15:18:10,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 15:18:10,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 15:18:10,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 420 transitions. [2023-08-03 15:18:10,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5490196078431373 [2023-08-03 15:18:10,987 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 420 transitions. [2023-08-03 15:18:10,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 420 transitions. [2023-08-03 15:18:10,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:18:10,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 420 transitions. [2023-08-03 15:18:10,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:10,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:10,991 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:10,991 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 128 flow. Second operand 3 states and 420 transitions. [2023-08-03 15:18:10,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 204 flow [2023-08-03 15:18:10,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 204 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 15:18:10,993 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 88 flow [2023-08-03 15:18:10,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, 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=88, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2023-08-03 15:18:10,994 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-03 15:18:10,994 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 88 flow [2023-08-03 15:18:10,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:10,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:18:10,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:18:10,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 15:18:10,995 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 15:18:10,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:18:10,996 INFO L85 PathProgramCache]: Analyzing trace with hash 348397031, now seen corresponding path program 1 times [2023-08-03 15:18:10,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:18:10,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025183106] [2023-08-03 15:18:10,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:10,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:18:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:11,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:18:11,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:18:11,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025183106] [2023-08-03 15:18:11,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025183106] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:18:11,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513154545] [2023-08-03 15:18:11,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:11,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:18:11,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:18:11,069 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) [2023-08-03 15:18:11,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 15:18:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:11,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 15:18:11,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:18:11,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:18:11,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 15:18:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:18:11,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513154545] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 15:18:11,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 15:18:11,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 15:18:11,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952942180] [2023-08-03 15:18:11,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 15:18:11,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 15:18:11,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:18:11,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 15:18:11,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 15:18:11,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 255 [2023-08-03 15:18:11,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 120.2) internal successors, (601), 5 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:11,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:18:11,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 255 [2023-08-03 15:18:11,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:18:11,439 INFO L124 PetriNetUnfolderBase]: 808/1399 cut-off events. [2023-08-03 15:18:11,440 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2023-08-03 15:18:11,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2956 conditions, 1399 events. 808/1399 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 7379 event pairs, 72 based on Foata normal form. 9/1408 useless extension candidates. Maximal degree in co-relation 334. Up to 901 conditions per place. [2023-08-03 15:18:11,448 INFO L140 encePairwiseOnDemand]: 251/255 looper letters, 47 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2023-08-03 15:18:11,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 59 transitions, 242 flow [2023-08-03 15:18:11,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 15:18:11,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 15:18:11,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 524 transitions. [2023-08-03 15:18:11,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5137254901960784 [2023-08-03 15:18:11,450 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 524 transitions. [2023-08-03 15:18:11,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 524 transitions. [2023-08-03 15:18:11,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:18:11,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 524 transitions. [2023-08-03 15:18:11,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:11,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 255.0) internal successors, (1275), 5 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:11,455 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 255.0) internal successors, (1275), 5 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:11,455 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 88 flow. Second operand 4 states and 524 transitions. [2023-08-03 15:18:11,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 59 transitions, 242 flow [2023-08-03 15:18:11,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 59 transitions, 238 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-03 15:18:11,458 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 104 flow [2023-08-03 15:18:11,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2023-08-03 15:18:11,461 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2023-08-03 15:18:11,461 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 104 flow [2023-08-03 15:18:11,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 120.2) internal successors, (601), 5 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:11,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:18:11,462 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 15:18:11,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 15:18:11,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:18:11,667 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 15:18:11,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:18:11,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1943664084, now seen corresponding path program 1 times [2023-08-03 15:18:11,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:18:11,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815726466] [2023-08-03 15:18:11,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:11,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:18:11,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:18:11,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:18:11,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815726466] [2023-08-03 15:18:11,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815726466] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:18:11,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625502487] [2023-08-03 15:18:11,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:11,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:18:11,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:18:11,782 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) [2023-08-03 15:18:11,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 15:18:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:11,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 15:18:11,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:18:11,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:18:11,873 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 15:18:11,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625502487] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:18:11,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 15:18:11,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 15:18:11,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577301307] [2023-08-03 15:18:11,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:18:11,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 15:18:11,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:18:11,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 15:18:11,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 15:18:11,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 255 [2023-08-03 15:18:11,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 104 flow. Second operand has 5 states, 5 states have (on average 119.6) internal successors, (598), 5 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:11,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:18:11,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 255 [2023-08-03 15:18:11,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:18:12,052 INFO L124 PetriNetUnfolderBase]: 664/1138 cut-off events. [2023-08-03 15:18:12,053 INFO L125 PetriNetUnfolderBase]: For 549/549 co-relation queries the response was YES. [2023-08-03 15:18:12,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2708 conditions, 1138 events. 664/1138 cut-off events. For 549/549 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 5736 event pairs, 0 based on Foata normal form. 81/1219 useless extension candidates. Maximal degree in co-relation 292. Up to 900 conditions per place. [2023-08-03 15:18:12,060 INFO L140 encePairwiseOnDemand]: 252/255 looper letters, 47 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2023-08-03 15:18:12,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 57 transitions, 246 flow [2023-08-03 15:18:12,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 15:18:12,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 15:18:12,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 641 transitions. [2023-08-03 15:18:12,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5027450980392156 [2023-08-03 15:18:12,062 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 641 transitions. [2023-08-03 15:18:12,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 641 transitions. [2023-08-03 15:18:12,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:18:12,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 641 transitions. [2023-08-03 15:18:12,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 128.2) internal successors, (641), 5 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:12,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 255.0) internal successors, (1530), 6 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:12,067 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 255.0) internal successors, (1530), 6 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:12,067 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 104 flow. Second operand 5 states and 641 transitions. [2023-08-03 15:18:12,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 57 transitions, 246 flow [2023-08-03 15:18:12,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 57 transitions, 239 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-03 15:18:12,071 INFO L231 Difference]: Finished difference. Result has 44 places, 32 transitions, 93 flow [2023-08-03 15:18:12,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=40, 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=5, PETRI_FLOW=93, PETRI_PLACES=44, PETRI_TRANSITIONS=32} [2023-08-03 15:18:12,073 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2023-08-03 15:18:12,073 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 32 transitions, 93 flow [2023-08-03 15:18:12,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 119.6) internal successors, (598), 5 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:12,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:18:12,074 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 15:18:12,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 15:18:12,278 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 [2023-08-03 15:18:12,279 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 15:18:12,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:18:12,279 INFO L85 PathProgramCache]: Analyzing trace with hash -124040407, now seen corresponding path program 1 times [2023-08-03 15:18:12,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:18:12,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215242008] [2023-08-03 15:18:12,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:12,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:18:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:12,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 15:18:12,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:18:12,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215242008] [2023-08-03 15:18:12,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215242008] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:18:12,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948898135] [2023-08-03 15:18:12,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:12,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:18:12,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:18:12,515 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) [2023-08-03 15:18:12,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 15:18:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:12,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-03 15:18:12,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:18:12,630 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-03 15:18:12,632 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 [2023-08-03 15:18:12,659 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 [2023-08-03 15:18:12,701 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 [2023-08-03 15:18:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 15:18:12,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 15:18:12,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 15:18:12,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948898135] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 15:18:12,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 15:18:12,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-03 15:18:12,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937120893] [2023-08-03 15:18:12,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 15:18:12,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 15:18:12,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:18:12,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 15:18:12,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2023-08-03 15:18:12,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 255 [2023-08-03 15:18:12,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 32 transitions, 93 flow. Second operand has 7 states, 7 states have (on average 95.57142857142857) internal successors, (669), 7 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:12,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:18:12,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 255 [2023-08-03 15:18:12,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:18:13,104 INFO L124 PetriNetUnfolderBase]: 796/1392 cut-off events. [2023-08-03 15:18:13,104 INFO L125 PetriNetUnfolderBase]: For 969/969 co-relation queries the response was YES. [2023-08-03 15:18:13,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3186 conditions, 1392 events. 796/1392 cut-off events. For 969/969 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 6768 event pairs, 316 based on Foata normal form. 16/1408 useless extension candidates. Maximal degree in co-relation 2391. Up to 1145 conditions per place. [2023-08-03 15:18:13,112 INFO L140 encePairwiseOnDemand]: 251/255 looper letters, 38 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2023-08-03 15:18:13,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 224 flow [2023-08-03 15:18:13,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 15:18:13,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 15:18:13,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 316 transitions. [2023-08-03 15:18:13,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4130718954248366 [2023-08-03 15:18:13,114 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 316 transitions. [2023-08-03 15:18:13,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 316 transitions. [2023-08-03 15:18:13,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:18:13,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 316 transitions. [2023-08-03 15:18:13,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:13,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:13,118 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:13,118 INFO L175 Difference]: Start difference. First operand has 44 places, 32 transitions, 93 flow. Second operand 3 states and 316 transitions. [2023-08-03 15:18:13,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 224 flow [2023-08-03 15:18:13,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 216 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 15:18:13,121 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 107 flow [2023-08-03 15:18:13,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, 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=107, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2023-08-03 15:18:13,124 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2023-08-03 15:18:13,124 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 107 flow [2023-08-03 15:18:13,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 95.57142857142857) internal successors, (669), 7 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:13,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:18:13,124 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:18:13,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-03 15:18:13,329 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 [2023-08-03 15:18:13,329 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 15:18:13,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:18:13,330 INFO L85 PathProgramCache]: Analyzing trace with hash -2019793702, now seen corresponding path program 1 times [2023-08-03 15:18:13,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:18:13,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824315880] [2023-08-03 15:18:13,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:13,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:18:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:13,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 15:18:13,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:18:13,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824315880] [2023-08-03 15:18:13,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824315880] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:18:13,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921941785] [2023-08-03 15:18:13,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:13,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:18:13,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:18:13,426 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) [2023-08-03 15:18:13,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 15:18:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:13,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-03 15:18:13,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:18:13,549 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 [2023-08-03 15:18:13,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 15:18:13,618 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 [2023-08-03 15:18:13,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 15:18:13,629 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 15:18:13,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921941785] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:18:13,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 15:18:13,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-08-03 15:18:13,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907116945] [2023-08-03 15:18:13,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:18:13,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 15:18:13,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:18:13,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 15:18:13,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-03 15:18:13,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 255 [2023-08-03 15:18:13,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 107 flow. Second operand has 5 states, 5 states have (on average 110.4) internal successors, (552), 5 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) [2023-08-03 15:18:13,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:18:13,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 255 [2023-08-03 15:18:13,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:18:13,799 INFO L124 PetriNetUnfolderBase]: 319/668 cut-off events. [2023-08-03 15:18:13,799 INFO L125 PetriNetUnfolderBase]: For 522/522 co-relation queries the response was YES. [2023-08-03 15:18:13,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1732 conditions, 668 events. 319/668 cut-off events. For 522/522 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3016 event pairs, 99 based on Foata normal form. 146/814 useless extension candidates. Maximal degree in co-relation 925. Up to 422 conditions per place. [2023-08-03 15:18:13,803 INFO L140 encePairwiseOnDemand]: 245/255 looper letters, 28 selfloop transitions, 10 changer transitions 0/43 dead transitions. [2023-08-03 15:18:13,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 219 flow [2023-08-03 15:18:13,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 15:18:13,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 15:18:13,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 471 transitions. [2023-08-03 15:18:13,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46176470588235297 [2023-08-03 15:18:13,805 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 471 transitions. [2023-08-03 15:18:13,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 471 transitions. [2023-08-03 15:18:13,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:18:13,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 471 transitions. [2023-08-03 15:18:13,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:13,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 255.0) internal successors, (1275), 5 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:13,808 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 255.0) internal successors, (1275), 5 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:13,808 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 107 flow. Second operand 4 states and 471 transitions. [2023-08-03 15:18:13,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 219 flow [2023-08-03 15:18:13,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 216 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 15:18:13,810 INFO L231 Difference]: Finished difference. Result has 46 places, 34 transitions, 124 flow [2023-08-03 15:18:13,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=43, 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=124, PETRI_PLACES=46, PETRI_TRANSITIONS=34} [2023-08-03 15:18:13,810 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-08-03 15:18:13,811 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 34 transitions, 124 flow [2023-08-03 15:18:13,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.4) internal successors, (552), 5 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) [2023-08-03 15:18:13,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:18:13,811 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:18:13,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 15:18:14,016 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 [2023-08-03 15:18:14,016 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 15:18:14,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:18:14,016 INFO L85 PathProgramCache]: Analyzing trace with hash 365673380, now seen corresponding path program 1 times [2023-08-03 15:18:14,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:18:14,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370802367] [2023-08-03 15:18:14,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:14,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:18:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 15:18:14,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:18:14,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370802367] [2023-08-03 15:18:14,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370802367] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:18:14,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240681900] [2023-08-03 15:18:14,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:14,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:18:14,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:18:14,133 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) [2023-08-03 15:18:14,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 15:18:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:14,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-03 15:18:14,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:18:14,258 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 [2023-08-03 15:18:14,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 15:18:14,280 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 [2023-08-03 15:18:14,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 15:18:14,301 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 [2023-08-03 15:18:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 15:18:14,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 15:18:14,362 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-03 15:18:14,362 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 [2023-08-03 15:18:14,367 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 [2023-08-03 15:18:14,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 15:18:14,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240681900] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 15:18:14,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 15:18:14,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-03 15:18:14,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134520871] [2023-08-03 15:18:14,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 15:18:14,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-03 15:18:14,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:18:14,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-03 15:18:14,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-08-03 15:18:14,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 255 [2023-08-03 15:18:14,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 34 transitions, 124 flow. Second operand has 10 states, 10 states have (on average 113.1) internal successors, (1131), 10 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:14,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:18:14,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 255 [2023-08-03 15:18:14,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:18:14,621 INFO L124 PetriNetUnfolderBase]: 57/197 cut-off events. [2023-08-03 15:18:14,621 INFO L125 PetriNetUnfolderBase]: For 251/251 co-relation queries the response was YES. [2023-08-03 15:18:14,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 560 conditions, 197 events. 57/197 cut-off events. For 251/251 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 695 event pairs, 6 based on Foata normal form. 66/263 useless extension candidates. Maximal degree in co-relation 442. Up to 137 conditions per place. [2023-08-03 15:18:14,622 INFO L140 encePairwiseOnDemand]: 249/255 looper letters, 25 selfloop transitions, 6 changer transitions 0/38 dead transitions. [2023-08-03 15:18:14,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 38 transitions, 208 flow [2023-08-03 15:18:14,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 15:18:14,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 15:18:14,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 470 transitions. [2023-08-03 15:18:14,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46078431372549017 [2023-08-03 15:18:14,624 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 470 transitions. [2023-08-03 15:18:14,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 470 transitions. [2023-08-03 15:18:14,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:18:14,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 470 transitions. [2023-08-03 15:18:14,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:14,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 255.0) internal successors, (1275), 5 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:14,627 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 255.0) internal successors, (1275), 5 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:14,627 INFO L175 Difference]: Start difference. First operand has 46 places, 34 transitions, 124 flow. Second operand 4 states and 470 transitions. [2023-08-03 15:18:14,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 38 transitions, 208 flow [2023-08-03 15:18:14,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 38 transitions, 188 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 15:18:14,629 INFO L231 Difference]: Finished difference. Result has 46 places, 34 transitions, 116 flow [2023-08-03 15:18:14,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=43, 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=116, PETRI_PLACES=46, PETRI_TRANSITIONS=34} [2023-08-03 15:18:14,629 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-08-03 15:18:14,630 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 34 transitions, 116 flow [2023-08-03 15:18:14,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 113.1) internal successors, (1131), 10 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:14,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:18:14,630 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] [2023-08-03 15:18:14,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 15:18:14,834 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 [2023-08-03 15:18:14,835 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 15:18:14,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:18:14,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1636776051, now seen corresponding path program 1 times [2023-08-03 15:18:14,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:18:14,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223188772] [2023-08-03 15:18:14,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:14,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:18:14,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:15,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 15:18:15,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:18:15,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223188772] [2023-08-03 15:18:15,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223188772] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:18:15,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978534170] [2023-08-03 15:18:15,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:15,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:18:15,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:18:15,169 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) [2023-08-03 15:18:15,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 15:18:15,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:15,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-03 15:18:15,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:18:15,271 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-03 15:18:15,271 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 [2023-08-03 15:18:15,299 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 [2023-08-03 15:18:15,347 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 [2023-08-03 15:18:15,420 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 [2023-08-03 15:18:15,486 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 [2023-08-03 15:18:15,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 15:18:15,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 15:18:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 15:18:15,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978534170] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 15:18:15,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 15:18:15,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 16 [2023-08-03 15:18:15,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890524777] [2023-08-03 15:18:15,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 15:18:15,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-03 15:18:15,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:18:15,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-03 15:18:15,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=237, Unknown=6, NotChecked=0, Total=306 [2023-08-03 15:18:15,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 255 [2023-08-03 15:18:15,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 34 transitions, 116 flow. Second operand has 18 states, 18 states have (on average 89.77777777777777) internal successors, (1616), 18 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:15,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:18:15,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 255 [2023-08-03 15:18:15,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:18:15,939 INFO L124 PetriNetUnfolderBase]: 88/284 cut-off events. [2023-08-03 15:18:15,939 INFO L125 PetriNetUnfolderBase]: For 231/231 co-relation queries the response was YES. [2023-08-03 15:18:15,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 809 conditions, 284 events. 88/284 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1267 event pairs, 16 based on Foata normal form. 2/286 useless extension candidates. Maximal degree in co-relation 674. Up to 114 conditions per place. [2023-08-03 15:18:15,941 INFO L140 encePairwiseOnDemand]: 246/255 looper letters, 65 selfloop transitions, 15 changer transitions 6/91 dead transitions. [2023-08-03 15:18:15,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 91 transitions, 538 flow [2023-08-03 15:18:15,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-03 15:18:15,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-03 15:18:15,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1039 transitions. [2023-08-03 15:18:15,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37040998217468807 [2023-08-03 15:18:15,944 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1039 transitions. [2023-08-03 15:18:15,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1039 transitions. [2023-08-03 15:18:15,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:18:15,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1039 transitions. [2023-08-03 15:18:15,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 94.45454545454545) internal successors, (1039), 11 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:15,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 255.0) internal successors, (3060), 12 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:15,951 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 255.0) internal successors, (3060), 12 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:15,951 INFO L175 Difference]: Start difference. First operand has 46 places, 34 transitions, 116 flow. Second operand 11 states and 1039 transitions. [2023-08-03 15:18:15,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 91 transitions, 538 flow [2023-08-03 15:18:15,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 91 transitions, 523 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 15:18:15,954 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 209 flow [2023-08-03 15:18:15,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=209, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2023-08-03 15:18:15,954 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2023-08-03 15:18:15,954 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 209 flow [2023-08-03 15:18:15,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 89.77777777777777) internal successors, (1616), 18 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:15,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:18:15,955 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] [2023-08-03 15:18:15,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 15:18:16,156 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 [2023-08-03 15:18:16,156 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 15:18:16,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:18:16,157 INFO L85 PathProgramCache]: Analyzing trace with hash 225544056, now seen corresponding path program 1 times [2023-08-03 15:18:16,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:18:16,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382156741] [2023-08-03 15:18:16,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:16,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:18:16,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 15:18:16,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:18:16,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382156741] [2023-08-03 15:18:16,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382156741] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:18:16,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238117946] [2023-08-03 15:18:16,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:16,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:18:16,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:18:16,519 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) [2023-08-03 15:18:16,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 15:18:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:16,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-03 15:18:16,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:18:16,627 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-03 15:18:16,628 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 [2023-08-03 15:18:16,654 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 [2023-08-03 15:18:16,697 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 [2023-08-03 15:18:16,797 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 [2023-08-03 15:18:16,864 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 [2023-08-03 15:18:16,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 15:18:16,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 15:18:16,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 15:18:16,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238117946] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 15:18:16,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 15:18:16,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 16 [2023-08-03 15:18:16,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883163180] [2023-08-03 15:18:16,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 15:18:16,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-03 15:18:16,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:18:16,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-03 15:18:16,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=229, Unknown=13, NotChecked=0, Total=306 [2023-08-03 15:18:17,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 255 [2023-08-03 15:18:17,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 209 flow. Second operand has 18 states, 18 states have (on average 95.88888888888889) internal successors, (1726), 18 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:17,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:18:17,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 255 [2023-08-03 15:18:17,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:18:17,588 INFO L124 PetriNetUnfolderBase]: 88/282 cut-off events. [2023-08-03 15:18:17,588 INFO L125 PetriNetUnfolderBase]: For 274/274 co-relation queries the response was YES. [2023-08-03 15:18:17,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 877 conditions, 282 events. 88/282 cut-off events. For 274/274 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1249 event pairs, 33 based on Foata normal form. 1/283 useless extension candidates. Maximal degree in co-relation 763. Up to 175 conditions per place. [2023-08-03 15:18:17,590 INFO L140 encePairwiseOnDemand]: 246/255 looper letters, 52 selfloop transitions, 9 changer transitions 4/70 dead transitions. [2023-08-03 15:18:17,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 70 transitions, 434 flow [2023-08-03 15:18:17,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-03 15:18:17,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-03 15:18:17,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 890 transitions. [2023-08-03 15:18:17,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877995642701525 [2023-08-03 15:18:17,593 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 890 transitions. [2023-08-03 15:18:17,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 890 transitions. [2023-08-03 15:18:17,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:18:17,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 890 transitions. [2023-08-03 15:18:17,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 98.88888888888889) internal successors, (890), 9 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:17,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 255.0) internal successors, (2550), 10 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:17,599 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 255.0) internal successors, (2550), 10 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:17,599 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 209 flow. Second operand 9 states and 890 transitions. [2023-08-03 15:18:17,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 70 transitions, 434 flow [2023-08-03 15:18:17,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 70 transitions, 427 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-03 15:18:17,604 INFO L231 Difference]: Finished difference. Result has 71 places, 52 transitions, 255 flow [2023-08-03 15:18:17,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=255, PETRI_PLACES=71, PETRI_TRANSITIONS=52} [2023-08-03 15:18:17,605 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2023-08-03 15:18:17,605 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 52 transitions, 255 flow [2023-08-03 15:18:17,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 95.88888888888889) internal successors, (1726), 18 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:17,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:18:17,606 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] [2023-08-03 15:18:17,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-03 15:18:17,810 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 [2023-08-03 15:18:17,811 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 15:18:17,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:18:17,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1915439555, now seen corresponding path program 2 times [2023-08-03 15:18:17,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:18:17,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279060365] [2023-08-03 15:18:17,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:17,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:18:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:18:18,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:18:18,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279060365] [2023-08-03 15:18:18,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279060365] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:18:18,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890879631] [2023-08-03 15:18:18,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 15:18:18,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:18:18,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:18:18,095 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) [2023-08-03 15:18:18,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 15:18:18,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 15:18:18,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 15:18:18,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-03 15:18:18,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:18:18,214 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-03 15:18:18,214 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 [2023-08-03 15:18:18,239 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 [2023-08-03 15:18:18,348 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 [2023-08-03 15:18:18,424 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 [2023-08-03 15:18:18,456 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 [2023-08-03 15:18:18,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:18:18,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 15:18:18,508 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_~g2~0.base) c_~g2~0.offset) 0)) is different from false [2023-08-03 15:18:18,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-03 15:18:18,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890879631] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 15:18:18,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 15:18:18,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-03 15:18:18,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320453609] [2023-08-03 15:18:18,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 15:18:18,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-03 15:18:18,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:18:18,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-03 15:18:18,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=225, Unknown=14, NotChecked=32, Total=342 [2023-08-03 15:18:18,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 255 [2023-08-03 15:18:18,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 52 transitions, 255 flow. Second operand has 19 states, 19 states have (on average 89.73684210526316) internal successors, (1705), 19 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:18,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:18:18,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 255 [2023-08-03 15:18:18,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:18:19,028 INFO L124 PetriNetUnfolderBase]: 88/282 cut-off events. [2023-08-03 15:18:19,028 INFO L125 PetriNetUnfolderBase]: For 283/283 co-relation queries the response was YES. [2023-08-03 15:18:19,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 927 conditions, 282 events. 88/282 cut-off events. For 283/283 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1259 event pairs, 39 based on Foata normal form. 1/283 useless extension candidates. Maximal degree in co-relation 809. Up to 126 conditions per place. [2023-08-03 15:18:19,031 INFO L140 encePairwiseOnDemand]: 247/255 looper letters, 52 selfloop transitions, 14 changer transitions 2/73 dead transitions. [2023-08-03 15:18:19,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 73 transitions, 496 flow [2023-08-03 15:18:19,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 15:18:19,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 15:18:19,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 660 transitions. [2023-08-03 15:18:19,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697478991596639 [2023-08-03 15:18:19,033 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 660 transitions. [2023-08-03 15:18:19,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 660 transitions. [2023-08-03 15:18:19,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:18:19,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 660 transitions. [2023-08-03 15:18:19,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 94.28571428571429) internal successors, (660), 7 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:19,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 255.0) internal successors, (2040), 8 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:19,038 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 255.0) internal successors, (2040), 8 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:19,038 INFO L175 Difference]: Start difference. First operand has 71 places, 52 transitions, 255 flow. Second operand 7 states and 660 transitions. [2023-08-03 15:18:19,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 73 transitions, 496 flow [2023-08-03 15:18:19,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 73 transitions, 491 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-03 15:18:19,041 INFO L231 Difference]: Finished difference. Result has 79 places, 54 transitions, 310 flow [2023-08-03 15:18:19,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=310, PETRI_PLACES=79, PETRI_TRANSITIONS=54} [2023-08-03 15:18:19,042 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 35 predicate places. [2023-08-03 15:18:19,042 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 54 transitions, 310 flow [2023-08-03 15:18:19,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 89.73684210526316) internal successors, (1705), 19 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:19,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:18:19,043 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] [2023-08-03 15:18:19,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-03 15:18:19,249 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 [2023-08-03 15:18:19,249 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 15:18:19,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:18:19,249 INFO L85 PathProgramCache]: Analyzing trace with hash -79463568, now seen corresponding path program 1 times [2023-08-03 15:18:19,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:18:19,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039012358] [2023-08-03 15:18:19,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:19,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:18:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:19,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 15:18:19,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:18:19,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039012358] [2023-08-03 15:18:19,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039012358] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:18:19,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971612190] [2023-08-03 15:18:19,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:19,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:18:19,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:18:19,743 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) [2023-08-03 15:18:19,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-03 15:18:19,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:19,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-03 15:18:19,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:18:19,869 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-03 15:18:19,869 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 [2023-08-03 15:18:19,897 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 [2023-08-03 15:18:19,943 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 [2023-08-03 15:18:20,039 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 [2023-08-03 15:18:20,110 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 [2023-08-03 15:18:20,195 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 [2023-08-03 15:18:20,259 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 [2023-08-03 15:18:20,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 15:18:20,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 15:18:20,415 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_407 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_407) c_~g2~0.base) c_~g2~0.offset) 0)) is different from false [2023-08-03 15:18:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 5 not checked. [2023-08-03 15:18:20,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971612190] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 15:18:20,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 15:18:20,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 22 [2023-08-03 15:18:20,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115666068] [2023-08-03 15:18:20,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 15:18:20,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-03 15:18:20,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:18:20,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-03 15:18:20,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=423, Unknown=1, NotChecked=42, Total=552 [2023-08-03 15:18:20,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 255 [2023-08-03 15:18:20,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 54 transitions, 310 flow. Second operand has 24 states, 24 states have (on average 86.29166666666667) internal successors, (2071), 24 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:20,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:18:20,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 255 [2023-08-03 15:18:20,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:18:20,998 INFO L124 PetriNetUnfolderBase]: 96/321 cut-off events. [2023-08-03 15:18:20,998 INFO L125 PetriNetUnfolderBase]: For 453/453 co-relation queries the response was YES. [2023-08-03 15:18:21,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1127 conditions, 321 events. 96/321 cut-off events. For 453/453 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1499 event pairs, 21 based on Foata normal form. 2/323 useless extension candidates. Maximal degree in co-relation 983. Up to 75 conditions per place. [2023-08-03 15:18:21,001 INFO L140 encePairwiseOnDemand]: 241/255 looper letters, 32 selfloop transitions, 10 changer transitions 71/118 dead transitions. [2023-08-03 15:18:21,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 118 transitions, 843 flow [2023-08-03 15:18:21,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-03 15:18:21,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-03 15:18:21,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1928 transitions. [2023-08-03 15:18:21,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34367201426024957 [2023-08-03 15:18:21,007 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1928 transitions. [2023-08-03 15:18:21,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1928 transitions. [2023-08-03 15:18:21,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:18:21,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1928 transitions. [2023-08-03 15:18:21,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 87.63636363636364) internal successors, (1928), 22 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:21,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 255.0) internal successors, (5865), 23 states have internal predecessors, (5865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:21,020 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 255.0) internal successors, (5865), 23 states have internal predecessors, (5865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:21,020 INFO L175 Difference]: Start difference. First operand has 79 places, 54 transitions, 310 flow. Second operand 22 states and 1928 transitions. [2023-08-03 15:18:21,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 118 transitions, 843 flow [2023-08-03 15:18:21,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 118 transitions, 813 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-03 15:18:21,024 INFO L231 Difference]: Finished difference. Result has 104 places, 38 transitions, 239 flow [2023-08-03 15:18:21,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=239, PETRI_PLACES=104, PETRI_TRANSITIONS=38} [2023-08-03 15:18:21,025 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2023-08-03 15:18:21,025 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 38 transitions, 239 flow [2023-08-03 15:18:21,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 86.29166666666667) internal successors, (2071), 24 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:21,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:18:21,026 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] [2023-08-03 15:18:21,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-03 15:18:21,230 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 [2023-08-03 15:18:21,231 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 15:18:21,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:18:21,231 INFO L85 PathProgramCache]: Analyzing trace with hash 77080548, now seen corresponding path program 2 times [2023-08-03 15:18:21,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:18:21,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807152713] [2023-08-03 15:18:21,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:21,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:18:21,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 15:18:21,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:18:21,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807152713] [2023-08-03 15:18:21,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807152713] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:18:21,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786596732] [2023-08-03 15:18:21,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 15:18:21,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:18:21,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:18:21,680 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) [2023-08-03 15:18:21,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-03 15:18:21,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 15:18:21,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 15:18:21,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-03 15:18:21,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:18:21,808 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-03 15:18:21,809 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 [2023-08-03 15:18:21,836 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 [2023-08-03 15:18:21,931 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 [2023-08-03 15:18:22,015 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 [2023-08-03 15:18:22,049 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 [2023-08-03 15:18:22,137 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 [2023-08-03 15:18:22,213 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 [2023-08-03 15:18:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 15:18:22,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 15:18:22,333 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_505 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_505) c_~g2~0.base) c_~g2~0.offset) 0)) is different from false [2023-08-03 15:18:22,379 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_505 (Array Int Int))) (= (select (select (store (store |c_#memory_int| c_~g1~0.base (let ((.cse0 (select |c_#memory_int| c_~g1~0.base))) (store .cse0 c_~g1~0.offset (+ (select .cse0 c_~g1~0.offset) (- 1))))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_505) c_~g2~0.base) c_~g2~0.offset) 0)) is different from false [2023-08-03 15:18:22,423 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_505 (Array Int Int))) (= (select (select (store (store |c_#memory_int| c_~g1~0.base (let ((.cse0 (select |c_#memory_int| c_~g1~0.base))) (store .cse0 c_~g1~0.offset (select .cse0 c_~g1~0.offset)))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_505) c_~g2~0.base) c_~g2~0.offset) 0)) is different from false [2023-08-03 15:18:22,443 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_505 (Array Int Int)) (v_ArrVal_500 (Array Int Int))) (= (select (select (store (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_500))) (store .cse0 c_~g1~0.base (let ((.cse1 (select .cse0 c_~g1~0.base))) (store .cse1 c_~g1~0.offset (select .cse1 c_~g1~0.offset))))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_505) c_~g2~0.base) c_~g2~0.offset) 0)) is different from false [2023-08-03 15:18:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-08-03 15:18:22,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786596732] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 15:18:22,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 15:18:22,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 27 [2023-08-03 15:18:22,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66073056] [2023-08-03 15:18:22,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 15:18:22,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-03 15:18:22,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:18:22,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-03 15:18:22,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=16, NotChecked=196, Total=812 [2023-08-03 15:18:22,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 255 [2023-08-03 15:18:22,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 38 transitions, 239 flow. Second operand has 29 states, 29 states have (on average 85.72413793103448) internal successors, (2486), 29 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:22,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:18:22,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 255 [2023-08-03 15:18:22,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:18:23,026 INFO L124 PetriNetUnfolderBase]: 76/258 cut-off events. [2023-08-03 15:18:23,027 INFO L125 PetriNetUnfolderBase]: For 510/510 co-relation queries the response was YES. [2023-08-03 15:18:23,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 987 conditions, 258 events. 76/258 cut-off events. For 510/510 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1069 event pairs, 31 based on Foata normal form. 1/259 useless extension candidates. Maximal degree in co-relation 951. Up to 99 conditions per place. [2023-08-03 15:18:23,028 INFO L140 encePairwiseOnDemand]: 239/255 looper letters, 26 selfloop transitions, 5 changer transitions 42/78 dead transitions. [2023-08-03 15:18:23,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 78 transitions, 627 flow [2023-08-03 15:18:23,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-03 15:18:23,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-03 15:18:23,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1144 transitions. [2023-08-03 15:18:23,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34509803921568627 [2023-08-03 15:18:23,032 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1144 transitions. [2023-08-03 15:18:23,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1144 transitions. [2023-08-03 15:18:23,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:18:23,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1144 transitions. [2023-08-03 15:18:23,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 88.0) internal successors, (1144), 13 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:23,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 255.0) internal successors, (3570), 14 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:23,039 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 255.0) internal successors, (3570), 14 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:23,039 INFO L175 Difference]: Start difference. First operand has 104 places, 38 transitions, 239 flow. Second operand 13 states and 1144 transitions. [2023-08-03 15:18:23,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 78 transitions, 627 flow [2023-08-03 15:18:23,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 78 transitions, 494 flow, removed 33 selfloop flow, removed 30 redundant places. [2023-08-03 15:18:23,043 INFO L231 Difference]: Finished difference. Result has 73 places, 33 transitions, 164 flow [2023-08-03 15:18:23,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=164, PETRI_PLACES=73, PETRI_TRANSITIONS=33} [2023-08-03 15:18:23,043 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 29 predicate places. [2023-08-03 15:18:23,043 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 33 transitions, 164 flow [2023-08-03 15:18:23,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 85.72413793103448) internal successors, (2486), 29 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:23,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:18:23,045 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] [2023-08-03 15:18:23,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-03 15:18:23,249 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 [2023-08-03 15:18:23,249 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 15:18:23,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:18:23,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1922272484, now seen corresponding path program 3 times [2023-08-03 15:18:23,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:18:23,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534519740] [2023-08-03 15:18:23,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:23,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:18:23,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:23,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:18:23,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:18:23,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534519740] [2023-08-03 15:18:23,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534519740] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:18:23,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168164434] [2023-08-03 15:18:23,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-03 15:18:23,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:18:23,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:18:23,722 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) [2023-08-03 15:18:23,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-03 15:18:23,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-03 15:18:23,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 15:18:23,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-03 15:18:23,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:18:23,855 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-03 15:18:23,856 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 [2023-08-03 15:18:23,887 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 [2023-08-03 15:18:23,989 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 [2023-08-03 15:18:24,025 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 [2023-08-03 15:18:24,123 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 [2023-08-03 15:18:24,226 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 [2023-08-03 15:18:24,283 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 [2023-08-03 15:18:24,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:18:24,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 15:18:24,549 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_597 (Array Int Int))) (= (select (select (let ((.cse0 (store (store |c_#memory_int| c_~g1~0.base (store (select |c_#memory_int| c_~g1~0.base) c_~g1~0.offset (+ |c_t_funThread1of2ForFork0_#t~mem5| 1))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_597))) (store .cse0 c_~g1~0.base (let ((.cse1 (select .cse0 c_~g1~0.base))) (store .cse1 c_~g1~0.offset (+ (- 1) (select .cse1 c_~g1~0.offset)))))) c_~g2~0.base) c_~g2~0.offset) 0)) is different from false [2023-08-03 15:18:24,555 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_597 (Array Int Int))) (= (select (select (let ((.cse0 (store (store |c_#memory_int| c_~g1~0.base (let ((.cse2 (select |c_#memory_int| c_~g1~0.base))) (store .cse2 c_~g1~0.offset (+ (select .cse2 c_~g1~0.offset) 1)))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_597))) (store .cse0 c_~g1~0.base (let ((.cse1 (select .cse0 c_~g1~0.base))) (store .cse1 c_~g1~0.offset (+ (- 1) (select .cse1 c_~g1~0.offset)))))) c_~g2~0.base) c_~g2~0.offset) 0)) is different from false [2023-08-03 15:18:24,586 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_594 (Array Int Int)) (v_ArrVal_597 (Array Int Int))) (= (select (select (let ((.cse0 (store (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_594))) (store .cse2 c_~g1~0.base (let ((.cse3 (select .cse2 c_~g1~0.base))) (store .cse3 c_~g1~0.offset (+ (select .cse3 c_~g1~0.offset) 1))))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_597))) (store .cse0 c_~g1~0.base (let ((.cse1 (select .cse0 c_~g1~0.base))) (store .cse1 c_~g1~0.offset (+ (- 1) (select .cse1 c_~g1~0.offset)))))) c_~g2~0.base) c_~g2~0.offset) 0)) is different from false [2023-08-03 15:18:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-08-03 15:18:24,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168164434] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 15:18:24,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 15:18:24,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-08-03 15:18:24,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611383747] [2023-08-03 15:18:24,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 15:18:24,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-03 15:18:24,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:18:24,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-03 15:18:24,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=502, Unknown=7, NotChecked=144, Total=756 [2023-08-03 15:18:24,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 255 [2023-08-03 15:18:24,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 33 transitions, 164 flow. Second operand has 28 states, 28 states have (on average 85.82142857142857) internal successors, (2403), 28 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:24,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:18:24,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 255 [2023-08-03 15:18:24,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:18:24,968 INFO L124 PetriNetUnfolderBase]: 32/123 cut-off events. [2023-08-03 15:18:24,968 INFO L125 PetriNetUnfolderBase]: For 235/235 co-relation queries the response was YES. [2023-08-03 15:18:24,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 123 events. 32/123 cut-off events. For 235/235 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 313 event pairs, 18 based on Foata normal form. 1/124 useless extension candidates. Maximal degree in co-relation 411. Up to 64 conditions per place. [2023-08-03 15:18:24,969 INFO L140 encePairwiseOnDemand]: 242/255 looper letters, 0 selfloop transitions, 0 changer transitions 45/45 dead transitions. [2023-08-03 15:18:24,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 45 transitions, 340 flow [2023-08-03 15:18:24,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-03 15:18:24,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-03 15:18:24,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 952 transitions. [2023-08-03 15:18:24,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3393939393939394 [2023-08-03 15:18:24,974 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 952 transitions. [2023-08-03 15:18:24,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 952 transitions. [2023-08-03 15:18:24,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:18:24,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 952 transitions. [2023-08-03 15:18:24,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 86.54545454545455) internal successors, (952), 11 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:24,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 255.0) internal successors, (3060), 12 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:24,980 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 255.0) internal successors, (3060), 12 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:24,980 INFO L175 Difference]: Start difference. First operand has 73 places, 33 transitions, 164 flow. Second operand 11 states and 952 transitions. [2023-08-03 15:18:24,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 45 transitions, 340 flow [2023-08-03 15:18:24,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 45 transitions, 298 flow, removed 11 selfloop flow, removed 17 redundant places. [2023-08-03 15:18:24,982 INFO L231 Difference]: Finished difference. Result has 55 places, 0 transitions, 0 flow [2023-08-03 15:18:24,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=0, PETRI_PLACES=55, PETRI_TRANSITIONS=0} [2023-08-03 15:18:24,982 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2023-08-03 15:18:24,982 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 0 transitions, 0 flow [2023-08-03 15:18:24,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 85.82142857142857) internal successors, (2403), 28 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:18:24,983 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-03 15:18:24,983 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-03 15:18:24,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-03 15:18:25,188 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 [2023-08-03 15:18:25,188 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:18:25,190 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 15:18:25,190 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 15:18:25,192 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 03:18:25 BasicIcfg [2023-08-03 15:18:25,192 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 15:18:25,193 INFO L158 Benchmark]: Toolchain (without parser) took 21866.34ms. Allocated memory was 551.6MB in the beginning and 796.9MB in the end (delta: 245.4MB). Free memory was 507.9MB in the beginning and 464.1MB in the end (delta: 43.8MB). Peak memory consumption was 292.0MB. Max. memory is 16.0GB. [2023-08-03 15:18:25,193 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 358.6MB. Free memory was 311.7MB in the beginning and 311.6MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 15:18:25,193 INFO L158 Benchmark]: CACSL2BoogieTranslator took 513.84ms. Allocated memory is still 551.6MB. Free memory was 507.9MB in the beginning and 488.0MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-03 15:18:25,193 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.72ms. Allocated memory is still 551.6MB. Free memory was 488.0MB in the beginning and 485.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 15:18:25,194 INFO L158 Benchmark]: Boogie Preprocessor took 32.98ms. Allocated memory is still 551.6MB. Free memory was 485.9MB in the beginning and 484.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 15:18:25,194 INFO L158 Benchmark]: RCFGBuilder took 351.58ms. Allocated memory is still 551.6MB. Free memory was 484.3MB in the beginning and 469.3MB in the end (delta: 15.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-03 15:18:25,194 INFO L158 Benchmark]: TraceAbstraction took 20904.07ms. Allocated memory was 551.6MB in the beginning and 796.9MB in the end (delta: 245.4MB). Free memory was 468.9MB in the beginning and 464.1MB in the end (delta: 4.7MB). Peak memory consumption was 254.3MB. Max. memory is 16.0GB. [2023-08-03 15:18:25,195 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 358.6MB. Free memory was 311.7MB in the beginning and 311.6MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 513.84ms. Allocated memory is still 551.6MB. Free memory was 507.9MB in the beginning and 488.0MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 57.72ms. Allocated memory is still 551.6MB. Free memory was 488.0MB in the beginning and 485.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 32.98ms. Allocated memory is still 551.6MB. Free memory was 485.9MB in the beginning and 484.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 351.58ms. Allocated memory is still 551.6MB. Free memory was 484.3MB in the beginning and 469.3MB in the end (delta: 15.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 20904.07ms. Allocated memory was 551.6MB in the beginning and 796.9MB in the end (delta: 245.4MB). Free memory was 468.9MB in the beginning and 464.1MB in the end (delta: 4.7MB). Peak memory consumption was 254.3MB. 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: 2.9s, 98 PlacesBefore, 27 PlacesAfterwards, 106 TransitionsBefore, 32 TransitionsAfterwards, 2624 CoEnabledTransitionPairs, 7 FixpointIterations, 31 TrivialSequentialCompositions, 46 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 3 ChoiceCompositions, 89 TotalNumberOfCompositions, 5236 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2847, independent: 2652, independent conditional: 0, independent unconditional: 2652, dependent: 195, dependent conditional: 0, dependent unconditional: 195, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1423, independent: 1383, independent conditional: 0, independent unconditional: 1383, dependent: 40, dependent conditional: 0, dependent unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2847, independent: 1269, independent conditional: 0, independent unconditional: 1269, dependent: 155, dependent conditional: 0, dependent unconditional: 155, unknown: 1423, unknown conditional: 0, unknown unconditional: 1423] , Statistics on independence cache: Total cache size (in pairs): 101, Positive cache size: 86, Positive conditional cache size: 0, Positive unconditional cache size: 86, 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: 2.6s, 131 PlacesBefore, 44 PlacesAfterwards, 145 TransitionsBefore, 55 TransitionsAfterwards, 8000 CoEnabledTransitionPairs, 6 FixpointIterations, 31 TrivialSequentialCompositions, 59 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 17 ConcurrentYvCompositions, 3 ChoiceCompositions, 110 TotalNumberOfCompositions, 16190 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7438, independent: 7167, independent conditional: 0, independent unconditional: 7167, dependent: 271, dependent conditional: 0, dependent unconditional: 271, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3913, independent: 3860, independent conditional: 0, independent unconditional: 3860, dependent: 53, dependent conditional: 0, dependent unconditional: 53, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7438, independent: 3307, independent conditional: 0, independent unconditional: 3307, dependent: 218, dependent conditional: 0, dependent unconditional: 218, unknown: 3913, unknown conditional: 0, unknown unconditional: 3913] , Statistics on independence cache: Total cache size (in pairs): 256, Positive cache size: 230, Positive conditional cache size: 0, Positive unconditional cache size: 230, 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 - 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, 127 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: 3.6s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 27 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 16 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 46 IncrementalHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 1 mSDtfsCounter, 46 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=0, InterpolantAutomatonStates: 3, 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, 0.1s InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 5 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 with 2 thread instances CFG has 4 procedures, 154 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: 17.2s, OverallIterations: 12, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 4.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.6s, HoareTripleCheckerStatistics: 130 mSolverCounterUnknown, 1131 SdHoareTripleChecker+Valid, 2.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 984 mSDsluCounter, 223 SdHoareTripleChecker+Invalid, 2.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 592 IncrementalHoareTripleChecker+Unchecked, 213 mSDsCounter, 171 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4030 IncrementalHoareTripleChecker+Invalid, 4923 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 171 mSolverCounterUnsat, 10 mSDtfsCounter, 4030 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 537 GetRequests, 341 SyntacticMatches, 18 SemanticMatches, 178 ConstructedPredicates, 9 IntricatePredicates, 1 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=310occurred in iteration=9, InterpolantAutomatonStates: 96, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 6.6s InterpolantComputationTime, 478 NumberOfCodeBlocks, 478 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 655 ConstructedInterpolants, 67 QuantifiedInterpolants, 9566 SizeOfPredicates, 63 NumberOfNonLiveVariables, 2123 ConjunctsInSsa, 352 ConjunctsInUnsatCore, 32 InterpolantComputations, 3 PerfectInterpolantSequences, 35/175 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! [2023-08-03 15:18:25,212 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...