/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-name-comparator-trans.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:25:34,486 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:25:34,543 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:25:34,547 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:25:34,547 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:25:34,547 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:25:34,548 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:25:34,567 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:25:34,568 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:25:34,572 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:25:34,572 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:25:34,572 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:25:34,573 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:25:34,574 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:25:34,574 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:25:34,574 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:25:34,574 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:25:34,574 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:25:34,574 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:25:34,575 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:25:34,575 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:25:34,576 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:25:34,576 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:25:34,576 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:25:34,576 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:25:34,576 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:25:34,576 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:25:34,577 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:25:34,577 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:25:34,577 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:25:34,577 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:25:34,577 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:25:34,577 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:25:34,577 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:25:34,577 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:25:34,578 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:25:34,578 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:25:34,578 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:25:34,578 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:25:34,578 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:25:34,578 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:25:34,578 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:25:34,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:25:34,723 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:25:34,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:25:34,725 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:25:34,725 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:25:34,726 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-name-comparator-trans.wvr_bound2.c [2023-08-04 08:25:35,739 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:25:35,890 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:25:35,890 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-name-comparator-trans.wvr_bound2.c [2023-08-04 08:25:35,896 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea57dfeb5/4f2bbea6f39d4063baaaace7c4cdecec/FLAG1b61d38c8 [2023-08-04 08:25:35,904 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea57dfeb5/4f2bbea6f39d4063baaaace7c4cdecec [2023-08-04 08:25:35,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:25:35,907 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:25:35,908 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:25:35,908 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:25:35,910 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:25:35,910 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:25:35" (1/1) ... [2023-08-04 08:25:35,911 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@159a457e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:35, skipping insertion in model container [2023-08-04 08:25:35,911 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:25:35" (1/1) ... [2023-08-04 08:25:35,931 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:25:36,058 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-name-comparator-trans.wvr_bound2.c[5031,5044] [2023-08-04 08:25:36,062 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:25:36,067 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:25:36,089 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-name-comparator-trans.wvr_bound2.c[5031,5044] [2023-08-04 08:25:36,095 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:25:36,104 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:25:36,104 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:36 WrapperNode [2023-08-04 08:25:36,105 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:25:36,105 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:25:36,105 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:25:36,105 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:25:36,110 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:36" (1/1) ... [2023-08-04 08:25:36,116 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:36" (1/1) ... [2023-08-04 08:25:36,139 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 364 [2023-08-04 08:25:36,139 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:25:36,140 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:25:36,140 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:25:36,140 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:25:36,146 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:36" (1/1) ... [2023-08-04 08:25:36,146 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:36" (1/1) ... [2023-08-04 08:25:36,149 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:36" (1/1) ... [2023-08-04 08:25:36,149 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:36" (1/1) ... [2023-08-04 08:25:36,155 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:36" (1/1) ... [2023-08-04 08:25:36,158 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:36" (1/1) ... [2023-08-04 08:25:36,160 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:36" (1/1) ... [2023-08-04 08:25:36,161 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:36" (1/1) ... [2023-08-04 08:25:36,164 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:25:36,164 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:25:36,164 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:25:36,164 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:25:36,165 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:36" (1/1) ... [2023-08-04 08:25:36,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:25:36,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:25:36,201 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 08:25:36,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 08:25:36,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:25:36,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:25:36,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:25:36,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:25:36,223 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:25:36,223 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:25:36,223 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:25:36,223 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:25:36,223 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:25:36,224 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:25:36,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:25:36,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 08:25:36,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:25:36,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:25:36,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:25:36,225 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 08:25:36,325 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:25:36,326 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:25:36,705 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:25:36,712 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:25:36,712 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-04 08:25:36,713 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:25:36 BoogieIcfgContainer [2023-08-04 08:25:36,713 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:25:36,715 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:25:36,715 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:25:36,717 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:25:36,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:25:35" (1/3) ... [2023-08-04 08:25:36,718 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a4849 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:25:36, skipping insertion in model container [2023-08-04 08:25:36,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:25:36" (2/3) ... [2023-08-04 08:25:36,718 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76a4849 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:25:36, skipping insertion in model container [2023-08-04 08:25:36,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:25:36" (3/3) ... [2023-08-04 08:25:36,719 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-name-comparator-trans.wvr_bound2.c [2023-08-04 08:25:36,724 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:25:36,730 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:25:36,730 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:25:36,730 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:25:36,795 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 08:25:36,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 374 places, 408 transitions, 858 flow [2023-08-04 08:25:37,081 INFO L124 PetriNetUnfolderBase]: 135/1088 cut-off events. [2023-08-04 08:25:37,082 INFO L125 PetriNetUnfolderBase]: For 36/57 co-relation queries the response was YES. [2023-08-04 08:25:37,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1149 conditions, 1088 events. 135/1088 cut-off events. For 36/57 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 6694 event pairs, 0 based on Foata normal form. 0/943 useless extension candidates. Maximal degree in co-relation 589. Up to 16 conditions per place. [2023-08-04 08:25:37,095 INFO L82 GeneralOperation]: Start removeDead. Operand has 374 places, 408 transitions, 858 flow [2023-08-04 08:25:37,107 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 374 places, 408 transitions, 858 flow [2023-08-04 08:25:37,109 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:25:37,116 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 374 places, 408 transitions, 858 flow [2023-08-04 08:25:37,117 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 374 places, 408 transitions, 858 flow [2023-08-04 08:25:37,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 374 places, 408 transitions, 858 flow [2023-08-04 08:25:37,238 INFO L124 PetriNetUnfolderBase]: 135/1088 cut-off events. [2023-08-04 08:25:37,238 INFO L125 PetriNetUnfolderBase]: For 36/57 co-relation queries the response was YES. [2023-08-04 08:25:37,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1149 conditions, 1088 events. 135/1088 cut-off events. For 36/57 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 6694 event pairs, 0 based on Foata normal form. 0/943 useless extension candidates. Maximal degree in co-relation 589. Up to 16 conditions per place. [2023-08-04 08:25:37,286 INFO L119 LiptonReduction]: Number of co-enabled transitions 52920 [2023-08-04 08:25:47,261 INFO L134 LiptonReduction]: Checked pairs total: 59343 [2023-08-04 08:25:47,261 INFO L136 LiptonReduction]: Total number of compositions: 437 [2023-08-04 08:25:47,275 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:25:47,281 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;@5207bf81, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:25:47,281 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:25:47,286 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:25:47,286 INFO L124 PetriNetUnfolderBase]: 2/37 cut-off events. [2023-08-04 08:25:47,287 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:25:47,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:47,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:25:47,287 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:47,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:47,291 INFO L85 PathProgramCache]: Analyzing trace with hash 2083446447, now seen corresponding path program 1 times [2023-08-04 08:25:47,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:47,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493220302] [2023-08-04 08:25:47,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:47,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:47,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:25:47,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:47,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493220302] [2023-08-04 08:25:47,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493220302] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:25:47,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:25:47,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:25:47,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276797792] [2023-08-04 08:25:47,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:25:47,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:25:47,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:47,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:25:47,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:25:47,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 366 out of 845 [2023-08-04 08:25:47,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 55 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 368.6666666666667) internal successors, (1106), 3 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:47,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:47,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 366 of 845 [2023-08-04 08:25:47,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:48,358 INFO L124 PetriNetUnfolderBase]: 6178/9027 cut-off events. [2023-08-04 08:25:48,359 INFO L125 PetriNetUnfolderBase]: For 598/598 co-relation queries the response was YES. [2023-08-04 08:25:48,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18196 conditions, 9027 events. 6178/9027 cut-off events. For 598/598 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 46648 event pairs, 4648 based on Foata normal form. 0/6915 useless extension candidates. Maximal degree in co-relation 15113. Up to 8696 conditions per place. [2023-08-04 08:25:48,397 INFO L140 encePairwiseOnDemand]: 841/845 looper letters, 47 selfloop transitions, 2 changer transitions 3/55 dead transitions. [2023-08-04 08:25:48,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 250 flow [2023-08-04 08:25:48,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:25:48,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:25:48,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1149 transitions. [2023-08-04 08:25:48,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4532544378698225 [2023-08-04 08:25:48,414 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1149 transitions. [2023-08-04 08:25:48,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1149 transitions. [2023-08-04 08:25:48,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:48,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1149 transitions. [2023-08-04 08:25:48,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 383.0) internal successors, (1149), 3 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:48,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 845.0) internal successors, (3380), 4 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:48,432 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 845.0) internal successors, (3380), 4 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:48,434 INFO L175 Difference]: Start difference. First operand has 49 places, 55 transitions, 152 flow. Second operand 3 states and 1149 transitions. [2023-08-04 08:25:48,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 250 flow [2023-08-04 08:25:48,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 250 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:25:48,443 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 150 flow [2023-08-04 08:25:48,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=845, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=51, PETRI_TRANSITIONS=52} [2023-08-04 08:25:48,449 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2023-08-04 08:25:48,449 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 150 flow [2023-08-04 08:25:48,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 368.6666666666667) internal successors, (1106), 3 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:48,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:48,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:25:48,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:25:48,450 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:48,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:48,451 INFO L85 PathProgramCache]: Analyzing trace with hash 904606554, now seen corresponding path program 1 times [2023-08-04 08:25:48,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:48,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895122219] [2023-08-04 08:25:48,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:48,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:48,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:25:48,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:48,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895122219] [2023-08-04 08:25:48,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895122219] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:25:48,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:25:48,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:25:48,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089290797] [2023-08-04 08:25:48,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:25:48,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:25:48,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:48,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:25:48,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:25:48,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 366 out of 845 [2023-08-04 08:25:48,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 52 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 369.0) internal successors, (1107), 3 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:48,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:48,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 366 of 845 [2023-08-04 08:25:48,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:49,159 INFO L124 PetriNetUnfolderBase]: 5980/8646 cut-off events. [2023-08-04 08:25:49,159 INFO L125 PetriNetUnfolderBase]: For 559/559 co-relation queries the response was YES. [2023-08-04 08:25:49,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17433 conditions, 8646 events. 5980/8646 cut-off events. For 559/559 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 43767 event pairs, 2900 based on Foata normal form. 0/6609 useless extension candidates. Maximal degree in co-relation 17419. Up to 8372 conditions per place. [2023-08-04 08:25:49,191 INFO L140 encePairwiseOnDemand]: 842/845 looper letters, 52 selfloop transitions, 2 changer transitions 1/58 dead transitions. [2023-08-04 08:25:49,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 58 transitions, 272 flow [2023-08-04 08:25:49,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:25:49,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:25:49,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1153 transitions. [2023-08-04 08:25:49,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45483234714003945 [2023-08-04 08:25:49,194 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1153 transitions. [2023-08-04 08:25:49,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1153 transitions. [2023-08-04 08:25:49,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:49,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1153 transitions. [2023-08-04 08:25:49,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 384.3333333333333) internal successors, (1153), 3 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:49,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 845.0) internal successors, (3380), 4 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:49,201 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 845.0) internal successors, (3380), 4 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:49,201 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 150 flow. Second operand 3 states and 1153 transitions. [2023-08-04 08:25:49,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 58 transitions, 272 flow [2023-08-04 08:25:49,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 256 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-04 08:25:49,208 INFO L231 Difference]: Finished difference. Result has 47 places, 52 transitions, 142 flow [2023-08-04 08:25:49,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=845, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=47, PETRI_TRANSITIONS=52} [2023-08-04 08:25:49,210 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2023-08-04 08:25:49,213 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 52 transitions, 142 flow [2023-08-04 08:25:49,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 369.0) internal successors, (1107), 3 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:49,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:49,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:25:49,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 08:25:49,214 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:49,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:49,215 INFO L85 PathProgramCache]: Analyzing trace with hash -226375334, now seen corresponding path program 1 times [2023-08-04 08:25:49,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:49,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528811805] [2023-08-04 08:25:49,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:49,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:49,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:49,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:25:49,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:49,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528811805] [2023-08-04 08:25:49,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528811805] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:25:49,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201798657] [2023-08-04 08:25:49,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:49,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:49,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:25:49,293 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:25:49,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 08:25:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:49,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:25:49,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:25:49,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:25:49,382 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:25:49,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201798657] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:25:49,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:25:49,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:25:49,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455731945] [2023-08-04 08:25:49,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:25:49,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:25:49,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:49,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:25:49,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:25:49,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 366 out of 845 [2023-08-04 08:25:49,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 52 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 370.0) internal successors, (1110), 3 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:49,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:49,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 366 of 845 [2023-08-04 08:25:49,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:49,888 INFO L124 PetriNetUnfolderBase]: 5810/8386 cut-off events. [2023-08-04 08:25:49,888 INFO L125 PetriNetUnfolderBase]: For 107/107 co-relation queries the response was YES. [2023-08-04 08:25:49,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16892 conditions, 8386 events. 5810/8386 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 41985 event pairs, 2874 based on Foata normal form. 0/6417 useless extension candidates. Maximal degree in co-relation 16872. Up to 8050 conditions per place. [2023-08-04 08:25:49,915 INFO L140 encePairwiseOnDemand]: 842/845 looper letters, 57 selfloop transitions, 2 changer transitions 1/63 dead transitions. [2023-08-04 08:25:49,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 63 transitions, 284 flow [2023-08-04 08:25:49,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:25:49,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:25:49,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1158 transitions. [2023-08-04 08:25:49,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45680473372781066 [2023-08-04 08:25:49,918 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1158 transitions. [2023-08-04 08:25:49,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1158 transitions. [2023-08-04 08:25:49,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:49,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1158 transitions. [2023-08-04 08:25:49,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 386.0) internal successors, (1158), 3 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:49,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 845.0) internal successors, (3380), 4 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:49,924 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 845.0) internal successors, (3380), 4 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:49,924 INFO L175 Difference]: Start difference. First operand has 47 places, 52 transitions, 142 flow. Second operand 3 states and 1158 transitions. [2023-08-04 08:25:49,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 63 transitions, 284 flow [2023-08-04 08:25:49,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 63 transitions, 280 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:25:49,926 INFO L231 Difference]: Finished difference. Result has 48 places, 52 transitions, 146 flow [2023-08-04 08:25:49,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=845, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=48, PETRI_TRANSITIONS=52} [2023-08-04 08:25:49,926 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -1 predicate places. [2023-08-04 08:25:49,926 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 52 transitions, 146 flow [2023-08-04 08:25:49,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 370.0) internal successors, (1110), 3 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:49,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:49,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:25:49,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 08:25:50,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:50,134 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:50,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:50,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1471260390, now seen corresponding path program 1 times [2023-08-04 08:25:50,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:50,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760765792] [2023-08-04 08:25:50,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:50,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:25:50,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:50,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760765792] [2023-08-04 08:25:50,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760765792] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:25:50,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678826610] [2023-08-04 08:25:50,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:50,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:50,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:25:50,176 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:25:50,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 08:25:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:50,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:25:50,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:25:50,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:25:50,256 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:25:50,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678826610] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:25:50,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:25:50,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:25:50,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756215812] [2023-08-04 08:25:50,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:25:50,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:25:50,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:50,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:25:50,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:25:50,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 366 out of 845 [2023-08-04 08:25:50,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 52 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 371.0) internal successors, (1113), 3 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:50,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:50,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 366 of 845 [2023-08-04 08:25:50,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:50,794 INFO L124 PetriNetUnfolderBase]: 5785/8372 cut-off events. [2023-08-04 08:25:50,794 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2023-08-04 08:25:50,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16928 conditions, 8372 events. 5785/8372 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 41262 event pairs, 2813 based on Foata normal form. 0/6464 useless extension candidates. Maximal degree in co-relation 16908. Up to 7550 conditions per place. [2023-08-04 08:25:50,823 INFO L140 encePairwiseOnDemand]: 842/845 looper letters, 62 selfloop transitions, 2 changer transitions 1/68 dead transitions. [2023-08-04 08:25:50,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 68 transitions, 308 flow [2023-08-04 08:25:50,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:25:50,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:25:50,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1163 transitions. [2023-08-04 08:25:50,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4587771203155819 [2023-08-04 08:25:50,825 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1163 transitions. [2023-08-04 08:25:50,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1163 transitions. [2023-08-04 08:25:50,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:50,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1163 transitions. [2023-08-04 08:25:50,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 387.6666666666667) internal successors, (1163), 3 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:50,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 845.0) internal successors, (3380), 4 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:50,832 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 845.0) internal successors, (3380), 4 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:50,832 INFO L175 Difference]: Start difference. First operand has 48 places, 52 transitions, 146 flow. Second operand 3 states and 1163 transitions. [2023-08-04 08:25:50,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 68 transitions, 308 flow [2023-08-04 08:25:50,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 68 transitions, 304 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:25:50,833 INFO L231 Difference]: Finished difference. Result has 49 places, 52 transitions, 150 flow [2023-08-04 08:25:50,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=845, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=49, PETRI_TRANSITIONS=52} [2023-08-04 08:25:50,834 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2023-08-04 08:25:50,834 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 52 transitions, 150 flow [2023-08-04 08:25:50,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 371.0) internal successors, (1113), 3 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:50,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:50,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:25:50,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 08:25:51,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 08:25:51,039 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:51,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:51,040 INFO L85 PathProgramCache]: Analyzing trace with hash 810003476, now seen corresponding path program 1 times [2023-08-04 08:25:51,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:51,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669178732] [2023-08-04 08:25:51,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:51,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:51,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:25:51,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:51,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669178732] [2023-08-04 08:25:51,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669178732] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:25:51,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593271935] [2023-08-04 08:25:51,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:51,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:51,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:25:51,077 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:25:51,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 08:25:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:51,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:25:51,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:25:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:25:51,180 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:25:51,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593271935] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:25:51,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:25:51,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:25:51,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835457700] [2023-08-04 08:25:51,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:25:51,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:25:51,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:51,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:25:51,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:25:51,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 366 out of 845 [2023-08-04 08:25:51,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 52 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 372.0) internal successors, (1116), 3 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:51,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:51,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 366 of 845 [2023-08-04 08:25:51,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:51,604 INFO L124 PetriNetUnfolderBase]: 3460/5122 cut-off events. [2023-08-04 08:25:51,604 INFO L125 PetriNetUnfolderBase]: For 285/285 co-relation queries the response was YES. [2023-08-04 08:25:51,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10799 conditions, 5122 events. 3460/5122 cut-off events. For 285/285 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 23124 event pairs, 1957 based on Foata normal form. 0/4149 useless extension candidates. Maximal degree in co-relation 10778. Up to 3775 conditions per place. [2023-08-04 08:25:51,623 INFO L140 encePairwiseOnDemand]: 842/845 looper letters, 67 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-08-04 08:25:51,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 72 transitions, 334 flow [2023-08-04 08:25:51,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:25:51,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:25:51,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1167 transitions. [2023-08-04 08:25:51,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603550295857988 [2023-08-04 08:25:51,627 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1167 transitions. [2023-08-04 08:25:51,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1167 transitions. [2023-08-04 08:25:51,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:51,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1167 transitions. [2023-08-04 08:25:51,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 389.0) internal successors, (1167), 3 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:51,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 845.0) internal successors, (3380), 4 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:51,635 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 845.0) internal successors, (3380), 4 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:51,635 INFO L175 Difference]: Start difference. First operand has 49 places, 52 transitions, 150 flow. Second operand 3 states and 1167 transitions. [2023-08-04 08:25:51,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 72 transitions, 334 flow [2023-08-04 08:25:51,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 72 transitions, 330 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:25:51,637 INFO L231 Difference]: Finished difference. Result has 50 places, 53 transitions, 158 flow [2023-08-04 08:25:51,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=845, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=50, PETRI_TRANSITIONS=53} [2023-08-04 08:25:51,638 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2023-08-04 08:25:51,638 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 53 transitions, 158 flow [2023-08-04 08:25:51,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 372.0) internal successors, (1116), 3 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:51,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:51,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:25:51,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 08:25:51,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:51,845 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:51,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:51,845 INFO L85 PathProgramCache]: Analyzing trace with hash -51260888, now seen corresponding path program 1 times [2023-08-04 08:25:51,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:51,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522297105] [2023-08-04 08:25:51,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:51,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:51,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:51,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:25:51,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:51,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522297105] [2023-08-04 08:25:51,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522297105] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:25:51,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433197693] [2023-08-04 08:25:51,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:51,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:51,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:25:51,919 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:25:51,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 08:25:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:52,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:25:52,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:25:52,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:25:52,025 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:25:52,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433197693] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:25:52,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:25:52,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:25:52,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615881532] [2023-08-04 08:25:52,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:25:52,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:25:52,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:52,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:25:52,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:25:52,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 366 out of 845 [2023-08-04 08:25:52,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 53 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 373.6666666666667) internal successors, (1121), 3 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:52,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:52,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 366 of 845 [2023-08-04 08:25:52,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:52,335 INFO L124 PetriNetUnfolderBase]: 2982/4423 cut-off events. [2023-08-04 08:25:52,336 INFO L125 PetriNetUnfolderBase]: For 646/646 co-relation queries the response was YES. [2023-08-04 08:25:52,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9621 conditions, 4423 events. 2982/4423 cut-off events. For 646/646 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 19354 event pairs, 2069 based on Foata normal form. 0/3778 useless extension candidates. Maximal degree in co-relation 9599. Up to 3755 conditions per place. [2023-08-04 08:25:52,350 INFO L140 encePairwiseOnDemand]: 842/845 looper letters, 68 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-08-04 08:25:52,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 73 transitions, 344 flow [2023-08-04 08:25:52,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:25:52,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:25:52,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1167 transitions. [2023-08-04 08:25:52,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603550295857988 [2023-08-04 08:25:52,353 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1167 transitions. [2023-08-04 08:25:52,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1167 transitions. [2023-08-04 08:25:52,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:52,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1167 transitions. [2023-08-04 08:25:52,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 389.0) internal successors, (1167), 3 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:52,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 845.0) internal successors, (3380), 4 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:52,359 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 845.0) internal successors, (3380), 4 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:52,359 INFO L175 Difference]: Start difference. First operand has 50 places, 53 transitions, 158 flow. Second operand 3 states and 1167 transitions. [2023-08-04 08:25:52,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 73 transitions, 344 flow [2023-08-04 08:25:52,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 73 transitions, 342 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:25:52,364 INFO L231 Difference]: Finished difference. Result has 52 places, 54 transitions, 168 flow [2023-08-04 08:25:52,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=845, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=52, PETRI_TRANSITIONS=54} [2023-08-04 08:25:52,364 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-04 08:25:52,364 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 54 transitions, 168 flow [2023-08-04 08:25:52,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 373.6666666666667) internal successors, (1121), 3 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:52,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:52,365 INFO L208 CegarLoopForPetriNet]: trace histogram [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, 1, 1] [2023-08-04 08:25:52,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 08:25:52,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:52,570 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:52,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:52,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1979947575, now seen corresponding path program 1 times [2023-08-04 08:25:52,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:52,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922898880] [2023-08-04 08:25:52,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:52,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:52,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:25:52,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:52,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922898880] [2023-08-04 08:25:52,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922898880] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:25:52,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539422806] [2023-08-04 08:25:52,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:52,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:52,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:25:52,655 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:25:52,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 08:25:52,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:52,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:25:52,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:25:52,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:25:52,756 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:25:52,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539422806] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:25:52,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:25:52,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:25:52,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840964826] [2023-08-04 08:25:52,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:25:52,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:25:52,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:52,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:25:52,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:25:52,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 366 out of 845 [2023-08-04 08:25:52,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 54 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 375.3333333333333) internal successors, (1126), 3 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:52,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:52,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 366 of 845 [2023-08-04 08:25:52,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:53,083 INFO L124 PetriNetUnfolderBase]: 2966/4394 cut-off events. [2023-08-04 08:25:53,083 INFO L125 PetriNetUnfolderBase]: For 479/479 co-relation queries the response was YES. [2023-08-04 08:25:53,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9629 conditions, 4394 events. 2966/4394 cut-off events. For 479/479 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 19159 event pairs, 2310 based on Foata normal form. 0/3783 useless extension candidates. Maximal degree in co-relation 9606. Up to 4221 conditions per place. [2023-08-04 08:25:53,096 INFO L140 encePairwiseOnDemand]: 842/845 looper letters, 62 selfloop transitions, 2 changer transitions 3/70 dead transitions. [2023-08-04 08:25:53,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 70 transitions, 334 flow [2023-08-04 08:25:53,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:25:53,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:25:53,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1163 transitions. [2023-08-04 08:25:53,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4587771203155819 [2023-08-04 08:25:53,098 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1163 transitions. [2023-08-04 08:25:53,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1163 transitions. [2023-08-04 08:25:53,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:53,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1163 transitions. [2023-08-04 08:25:53,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 387.6666666666667) internal successors, (1163), 3 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:53,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 845.0) internal successors, (3380), 4 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:53,103 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 845.0) internal successors, (3380), 4 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:53,103 INFO L175 Difference]: Start difference. First operand has 52 places, 54 transitions, 168 flow. Second operand 3 states and 1163 transitions. [2023-08-04 08:25:53,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 70 transitions, 334 flow [2023-08-04 08:25:53,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 70 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:25:53,112 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 166 flow [2023-08-04 08:25:53,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=845, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2023-08-04 08:25:53,113 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 5 predicate places. [2023-08-04 08:25:53,113 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 166 flow [2023-08-04 08:25:53,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 375.3333333333333) internal successors, (1126), 3 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:53,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:25:53,113 INFO L208 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:25:53,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 08:25:53,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:53,318 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:25:53,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:25:53,318 INFO L85 PathProgramCache]: Analyzing trace with hash -2120777856, now seen corresponding path program 1 times [2023-08-04 08:25:53,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:25:53,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659066688] [2023-08-04 08:25:53,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:53,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:25:53,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:53,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:25:53,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:25:53,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659066688] [2023-08-04 08:25:53,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659066688] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:25:53,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337128802] [2023-08-04 08:25:53,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:25:53,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:53,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:25:53,402 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:25:53,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 08:25:53,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:25:53,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:25:53,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:25:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:25:53,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:25:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:25:53,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337128802] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:25:53,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:25:53,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-08-04 08:25:53,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234214708] [2023-08-04 08:25:53,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:25:53,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 08:25:53,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:25:53,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 08:25:53,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-04 08:25:53,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 359 out of 845 [2023-08-04 08:25:53,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 166 flow. Second operand has 8 states, 8 states have (on average 364.625) internal successors, (2917), 8 states have internal predecessors, (2917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:53,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:25:53,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 359 of 845 [2023-08-04 08:25:53,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:25:53,693 INFO L124 PetriNetUnfolderBase]: 12/33 cut-off events. [2023-08-04 08:25:53,693 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 08:25:53,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 33 events. 12/33 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 51 event pairs, 0 based on Foata normal form. 7/37 useless extension candidates. Maximal degree in co-relation 77. Up to 20 conditions per place. [2023-08-04 08:25:53,693 INFO L140 encePairwiseOnDemand]: 840/845 looper letters, 0 selfloop transitions, 0 changer transitions 20/20 dead transitions. [2023-08-04 08:25:53,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 20 transitions, 94 flow [2023-08-04 08:25:53,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 08:25:53,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 08:25:53,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2536 transitions. [2023-08-04 08:25:53,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42874049027895184 [2023-08-04 08:25:53,697 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2536 transitions. [2023-08-04 08:25:53,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2536 transitions. [2023-08-04 08:25:53,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:25:53,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2536 transitions. [2023-08-04 08:25:53,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 362.2857142857143) internal successors, (2536), 7 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:53,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 845.0) internal successors, (6760), 8 states have internal predecessors, (6760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:53,707 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 845.0) internal successors, (6760), 8 states have internal predecessors, (6760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:53,707 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 166 flow. Second operand 7 states and 2536 transitions. [2023-08-04 08:25:53,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 20 transitions, 94 flow [2023-08-04 08:25:53,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 20 transitions, 92 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:25:53,708 INFO L231 Difference]: Finished difference. Result has 27 places, 0 transitions, 0 flow [2023-08-04 08:25:53,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=845, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=27, PETRI_TRANSITIONS=0} [2023-08-04 08:25:53,708 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -22 predicate places. [2023-08-04 08:25:53,708 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 0 transitions, 0 flow [2023-08-04 08:25:53,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 364.625) internal successors, (2917), 8 states have internal predecessors, (2917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:25:53,711 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:25:53,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 08:25:53,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:25:53,925 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:25:53,927 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:25:53,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 374 places, 408 transitions, 858 flow [2023-08-04 08:25:54,055 INFO L124 PetriNetUnfolderBase]: 135/1088 cut-off events. [2023-08-04 08:25:54,055 INFO L125 PetriNetUnfolderBase]: For 36/57 co-relation queries the response was YES. [2023-08-04 08:25:54,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1149 conditions, 1088 events. 135/1088 cut-off events. For 36/57 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 6694 event pairs, 0 based on Foata normal form. 0/943 useless extension candidates. Maximal degree in co-relation 589. Up to 16 conditions per place. [2023-08-04 08:25:54,065 INFO L82 GeneralOperation]: Start removeDead. Operand has 374 places, 408 transitions, 858 flow [2023-08-04 08:25:54,069 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 374 places, 408 transitions, 858 flow [2023-08-04 08:25:54,069 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:25:54,069 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 374 places, 408 transitions, 858 flow [2023-08-04 08:25:54,069 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 374 places, 408 transitions, 858 flow [2023-08-04 08:25:54,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 374 places, 408 transitions, 858 flow [2023-08-04 08:25:54,176 INFO L124 PetriNetUnfolderBase]: 135/1088 cut-off events. [2023-08-04 08:25:54,176 INFO L125 PetriNetUnfolderBase]: For 36/57 co-relation queries the response was YES. [2023-08-04 08:25:54,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1149 conditions, 1088 events. 135/1088 cut-off events. For 36/57 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 6694 event pairs, 0 based on Foata normal form. 0/943 useless extension candidates. Maximal degree in co-relation 589. Up to 16 conditions per place. [2023-08-04 08:25:54,210 INFO L119 LiptonReduction]: Number of co-enabled transitions 52920 [2023-08-04 08:26:03,330 INFO L134 LiptonReduction]: Checked pairs total: 60328 [2023-08-04 08:26:03,330 INFO L136 LiptonReduction]: Total number of compositions: 434 [2023-08-04 08:26:03,331 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:26:03,332 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;@5207bf81, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:26:03,332 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 08:26:03,334 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:26:03,335 INFO L124 PetriNetUnfolderBase]: 3/36 cut-off events. [2023-08-04 08:26:03,335 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:26:03,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:03,335 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 08:26:03,335 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:26:03,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:03,335 INFO L85 PathProgramCache]: Analyzing trace with hash -700574414, now seen corresponding path program 1 times [2023-08-04 08:26:03,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:03,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750281604] [2023-08-04 08:26:03,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:03,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:03,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:26:03,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:03,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750281604] [2023-08-04 08:26:03,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750281604] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:03,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:26:03,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:26:03,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141988952] [2023-08-04 08:26:03,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:03,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:26:03,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:03,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:26:03,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:26:03,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 366 out of 842 [2023-08-04 08:26:03,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 57 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 367.6666666666667) internal successors, (1103), 3 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:03,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:03,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 366 of 842 [2023-08-04 08:26:03,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:03,977 INFO L124 PetriNetUnfolderBase]: 7139/10428 cut-off events. [2023-08-04 08:26:03,977 INFO L125 PetriNetUnfolderBase]: For 665/665 co-relation queries the response was YES. [2023-08-04 08:26:03,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20701 conditions, 10428 events. 7139/10428 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 54839 event pairs, 5538 based on Foata normal form. 0/8037 useless extension candidates. Maximal degree in co-relation 17618. Up to 9750 conditions per place. [2023-08-04 08:26:03,993 INFO L140 encePairwiseOnDemand]: 837/842 looper letters, 29 selfloop transitions, 2 changer transitions 21/56 dead transitions. [2023-08-04 08:26:03,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 56 transitions, 252 flow [2023-08-04 08:26:03,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:26:03,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:26:03,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1150 transitions. [2023-08-04 08:26:03,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4552652414885194 [2023-08-04 08:26:03,995 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1150 transitions. [2023-08-04 08:26:03,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1150 transitions. [2023-08-04 08:26:03,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:03,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1150 transitions. [2023-08-04 08:26:03,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 383.3333333333333) internal successors, (1150), 3 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:04,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 842.0) internal successors, (3368), 4 states have internal predecessors, (3368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:04,001 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 842.0) internal successors, (3368), 4 states have internal predecessors, (3368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:04,001 INFO L175 Difference]: Start difference. First operand has 50 places, 57 transitions, 156 flow. Second operand 3 states and 1150 transitions. [2023-08-04 08:26:04,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 56 transitions, 252 flow [2023-08-04 08:26:04,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 56 transitions, 252 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:26:04,003 INFO L231 Difference]: Finished difference. Result has 52 places, 35 transitions, 95 flow [2023-08-04 08:26:04,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=842, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=52, PETRI_TRANSITIONS=35} [2023-08-04 08:26:04,003 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2023-08-04 08:26:04,003 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 35 transitions, 95 flow [2023-08-04 08:26:04,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 367.6666666666667) internal successors, (1103), 3 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:04,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:04,004 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:04,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 08:26:04,004 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:26:04,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:04,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1793038438, now seen corresponding path program 1 times [2023-08-04 08:26:04,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:04,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501874425] [2023-08-04 08:26:04,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:04,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:04,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:04,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:26:04,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:04,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501874425] [2023-08-04 08:26:04,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501874425] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:26:04,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033763407] [2023-08-04 08:26:04,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:04,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:04,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:26:04,054 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:26:04,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 08:26:04,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:04,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:26:04,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:26:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:26:04,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:26:04,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:26:04,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033763407] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:26:04,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:26:04,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-04 08:26:04,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109748597] [2023-08-04 08:26:04,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:26:04,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 08:26:04,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:04,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 08:26:04,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-08-04 08:26:04,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 364 out of 842 [2023-08-04 08:26:04,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 35 transitions, 95 flow. Second operand has 8 states, 8 states have (on average 365.5) internal successors, (2924), 8 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:04,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:04,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 364 of 842 [2023-08-04 08:26:04,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:26:04,398 INFO L124 PetriNetUnfolderBase]: 2474/3641 cut-off events. [2023-08-04 08:26:04,398 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-08-04 08:26:04,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7262 conditions, 3641 events. 2474/3641 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 16475 event pairs, 1989 based on Foata normal form. 0/2831 useless extension candidates. Maximal degree in co-relation 7248. Up to 3447 conditions per place. [2023-08-04 08:26:04,409 INFO L140 encePairwiseOnDemand]: 839/842 looper letters, 29 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2023-08-04 08:26:04,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 37 transitions, 169 flow [2023-08-04 08:26:04,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:26:04,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:26:04,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1855 transitions. [2023-08-04 08:26:04,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44061757719714967 [2023-08-04 08:26:04,412 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1855 transitions. [2023-08-04 08:26:04,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1855 transitions. [2023-08-04 08:26:04,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:26:04,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1855 transitions. [2023-08-04 08:26:04,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 371.0) internal successors, (1855), 5 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:04,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 842.0) internal successors, (5052), 6 states have internal predecessors, (5052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:04,419 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 842.0) internal successors, (5052), 6 states have internal predecessors, (5052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:04,419 INFO L175 Difference]: Start difference. First operand has 52 places, 35 transitions, 95 flow. Second operand 5 states and 1855 transitions. [2023-08-04 08:26:04,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 37 transitions, 169 flow [2023-08-04 08:26:04,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 37 transitions, 165 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:26:04,420 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 117 flow [2023-08-04 08:26:04,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=842, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=117, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2023-08-04 08:26:04,421 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -5 predicate places. [2023-08-04 08:26:04,421 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 117 flow [2023-08-04 08:26:04,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 365.5) internal successors, (2924), 8 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:04,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:04,421 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2023-08-04 08:26:04,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 08:26:04,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:26:04,629 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:26:04,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:04,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1555825126, now seen corresponding path program 2 times [2023-08-04 08:26:04,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:04,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654811902] [2023-08-04 08:26:04,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:04,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:04,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:26:04,647 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:26:04,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:26:04,681 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:26:04,682 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:26:04,682 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 08:26:04,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 08:26:04,682 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 08:26:04,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-04 08:26:04,682 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-08-04 08:26:04,683 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 08:26:04,683 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:26:04,683 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:26:04,723 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 08:26:04,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 551 places, 609 transitions, 1308 flow [2023-08-04 08:26:05,703 INFO L124 PetriNetUnfolderBase]: 1020/5584 cut-off events. [2023-08-04 08:26:05,703 INFO L125 PetriNetUnfolderBase]: For 602/678 co-relation queries the response was YES. [2023-08-04 08:26:05,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6258 conditions, 5584 events. 1020/5584 cut-off events. For 602/678 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 50942 event pairs, 11 based on Foata normal form. 0/4808 useless extension candidates. Maximal degree in co-relation 3412. Up to 192 conditions per place. [2023-08-04 08:26:05,844 INFO L82 GeneralOperation]: Start removeDead. Operand has 551 places, 609 transitions, 1308 flow [2023-08-04 08:26:05,910 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 551 places, 609 transitions, 1308 flow [2023-08-04 08:26:05,910 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:26:05,910 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 551 places, 609 transitions, 1308 flow [2023-08-04 08:26:05,911 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 551 places, 609 transitions, 1308 flow [2023-08-04 08:26:05,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 551 places, 609 transitions, 1308 flow [2023-08-04 08:26:06,837 INFO L124 PetriNetUnfolderBase]: 1020/5584 cut-off events. [2023-08-04 08:26:06,837 INFO L125 PetriNetUnfolderBase]: For 602/678 co-relation queries the response was YES. [2023-08-04 08:26:06,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6258 conditions, 5584 events. 1020/5584 cut-off events. For 602/678 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 50942 event pairs, 11 based on Foata normal form. 0/4808 useless extension candidates. Maximal degree in co-relation 3412. Up to 192 conditions per place. [2023-08-04 08:26:07,316 INFO L119 LiptonReduction]: Number of co-enabled transitions 185220 [2023-08-04 08:26:17,462 INFO L134 LiptonReduction]: Checked pairs total: 557875 [2023-08-04 08:26:17,462 INFO L136 LiptonReduction]: Total number of compositions: 577 [2023-08-04 08:26:17,463 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:26:17,464 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;@5207bf81, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:26:17,464 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:26:17,465 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:26:17,465 INFO L124 PetriNetUnfolderBase]: 1/30 cut-off events. [2023-08-04 08:26:17,466 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 08:26:17,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:26:17,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:26:17,466 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:26:17,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:26:17,466 INFO L85 PathProgramCache]: Analyzing trace with hash -200408787, now seen corresponding path program 1 times [2023-08-04 08:26:17,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:26:17,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241966380] [2023-08-04 08:26:17,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:26:17,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:26:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:26:17,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:26:17,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:26:17,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241966380] [2023-08-04 08:26:17,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241966380] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:26:17,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:26:17,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:26:17,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46938147] [2023-08-04 08:26:17,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:26:17,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:26:17,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:26:17,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:26:17,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:26:17,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 540 out of 1186 [2023-08-04 08:26:17,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 178 transitions, 446 flow. Second operand has 3 states, 3 states have (on average 542.6666666666666) internal successors, (1628), 3 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:26:17,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:26:17,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 540 of 1186 [2023-08-04 08:26:17,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand