/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 INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-simpl-str-trans.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:12:42,318 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:12:42,385 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:12:42,390 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:12:42,390 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:12:42,391 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:12:42,391 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:12:42,424 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:12:42,424 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:12:42,424 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:12:42,425 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:12:42,425 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:12:42,426 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:12:42,426 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:12:42,426 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:12:42,427 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:12:42,427 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:12:42,427 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:12:42,428 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:12:42,428 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:12:42,428 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:12:42,432 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:12:42,433 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:12:42,433 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:12:42,438 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:12:42,438 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:12:42,438 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:12:42,439 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:12:42,439 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:12:42,439 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:12:42,440 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:12:42,440 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:12:42,440 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:12:42,441 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:12:42,441 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:12:42,441 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:12:42,441 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:12:42,441 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:12:42,441 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:12:42,441 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:12:42,442 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:12:42,442 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:12:42,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:12:42,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:12:42,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:12:42,693 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:12:42,693 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:12:42,694 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-simpl-str-trans.wvr_bound2.c [2023-08-04 02:12:43,803 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:12:43,997 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:12:43,998 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-simpl-str-trans.wvr_bound2.c [2023-08-04 02:12:44,006 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f14e9de32/2caa8b5dcdca4925ac59f02eb84ecea0/FLAG65babacbb [2023-08-04 02:12:44,021 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f14e9de32/2caa8b5dcdca4925ac59f02eb84ecea0 [2023-08-04 02:12:44,026 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:12:44,029 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:12:44,030 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:12:44,030 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:12:44,033 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:12:44,034 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:12:44" (1/1) ... [2023-08-04 02:12:44,034 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ba027ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:12:44, skipping insertion in model container [2023-08-04 02:12:44,035 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:12:44" (1/1) ... [2023-08-04 02:12:44,059 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:12:44,250 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-simpl-str-trans.wvr_bound2.c[2757,2770] [2023-08-04 02:12:44,262 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:12:44,269 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:12:44,287 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-simpl-str-trans.wvr_bound2.c[2757,2770] [2023-08-04 02:12:44,289 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:12:44,301 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:12:44,301 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:12:44 WrapperNode [2023-08-04 02:12:44,301 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:12:44,302 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:12:44,303 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:12:44,303 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:12:44,312 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:12:44" (1/1) ... [2023-08-04 02:12:44,318 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:12:44" (1/1) ... [2023-08-04 02:12:44,337 INFO L138 Inliner]: procedures = 23, calls = 30, calls flagged for inlining = 8, calls inlined = 12, statements flattened = 217 [2023-08-04 02:12:44,338 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:12:44,338 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:12:44,338 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:12:44,338 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:12:44,345 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:12:44" (1/1) ... [2023-08-04 02:12:44,345 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:12:44" (1/1) ... [2023-08-04 02:12:44,348 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:12:44" (1/1) ... [2023-08-04 02:12:44,348 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:12:44" (1/1) ... [2023-08-04 02:12:44,354 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:12:44" (1/1) ... [2023-08-04 02:12:44,358 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:12:44" (1/1) ... [2023-08-04 02:12:44,359 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:12:44" (1/1) ... [2023-08-04 02:12:44,360 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:12:44" (1/1) ... [2023-08-04 02:12:44,363 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:12:44,364 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:12:44,364 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:12:44,364 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:12:44,365 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:12:44" (1/1) ... [2023-08-04 02:12:44,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:12:44,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:12:44,394 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 02:12:44,400 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 02:12:44,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:12:44,429 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:12:44,429 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:12:44,429 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:12:44,429 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:12:44,429 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 02:12:44,429 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 02:12:44,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:12:44,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:12:44,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:12:44,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:12:44,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:12:44,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:12:44,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:12:44,433 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 02:12:44,519 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:12:44,520 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:12:44,823 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:12:44,831 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:12:44,832 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 02:12:44,833 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:12:44 BoogieIcfgContainer [2023-08-04 02:12:44,834 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:12:44,836 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:12:44,836 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:12:44,841 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:12:44,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:12:44" (1/3) ... [2023-08-04 02:12:44,842 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@197be722 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:12:44, skipping insertion in model container [2023-08-04 02:12:44,842 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:12:44" (2/3) ... [2023-08-04 02:12:44,842 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@197be722 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:12:44, skipping insertion in model container [2023-08-04 02:12:44,843 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:12:44" (3/3) ... [2023-08-04 02:12:44,844 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-simpl-str-trans.wvr_bound2.c [2023-08-04 02:12:44,850 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:12:44,856 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:12:44,857 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:12:44,857 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:12:44,972 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 02:12:45,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 243 transitions, 528 flow [2023-08-04 02:12:45,213 INFO L124 PetriNetUnfolderBase]: 110/807 cut-off events. [2023-08-04 02:12:45,214 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 02:12:45,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 807 events. 110/807 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4853 event pairs, 0 based on Foata normal form. 0/687 useless extension candidates. Maximal degree in co-relation 424. Up to 16 conditions per place. [2023-08-04 02:12:45,229 INFO L82 GeneralOperation]: Start removeDead. Operand has 222 places, 243 transitions, 528 flow [2023-08-04 02:12:45,239 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 243 transitions, 528 flow [2023-08-04 02:12:45,242 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:12:45,250 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 222 places, 243 transitions, 528 flow [2023-08-04 02:12:45,252 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 222 places, 243 transitions, 528 flow [2023-08-04 02:12:45,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 243 transitions, 528 flow [2023-08-04 02:12:45,360 INFO L124 PetriNetUnfolderBase]: 110/807 cut-off events. [2023-08-04 02:12:45,360 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 02:12:45,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 807 events. 110/807 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4853 event pairs, 0 based on Foata normal form. 0/687 useless extension candidates. Maximal degree in co-relation 424. Up to 16 conditions per place. [2023-08-04 02:12:45,400 INFO L119 LiptonReduction]: Number of co-enabled transitions 22644 [2023-08-04 02:12:51,101 INFO L134 LiptonReduction]: Checked pairs total: 24633 [2023-08-04 02:12:51,102 INFO L136 LiptonReduction]: Total number of compositions: 255 [2023-08-04 02:12:51,115 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:12:51,120 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;@492cc281, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:12:51,121 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:12:51,126 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:12:51,126 INFO L124 PetriNetUnfolderBase]: 0/26 cut-off events. [2023-08-04 02:12:51,126 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:12:51,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:12:51,127 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 02:12:51,128 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:12:51,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:12:51,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1285135905, now seen corresponding path program 1 times [2023-08-04 02:12:51,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:12:51,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811047458] [2023-08-04 02:12:51,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:12:51,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:12:51,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:12:51,267 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:12:51,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:12:51,331 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:12:51,334 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:12:51,335 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 02:12:51,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 02:12:51,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 02:12:51,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:12:51,338 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 02:12:51,343 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 02:12:51,343 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:12:51,343 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:12:51,418 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 02:12:51,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 321 places, 357 transitions, 804 flow [2023-08-04 02:12:52,388 INFO L124 PetriNetUnfolderBase]: 938/4752 cut-off events. [2023-08-04 02:12:52,389 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:12:52,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5426 conditions, 4752 events. 938/4752 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 41389 event pairs, 22 based on Foata normal form. 0/4058 useless extension candidates. Maximal degree in co-relation 2850. Up to 192 conditions per place. [2023-08-04 02:12:52,479 INFO L82 GeneralOperation]: Start removeDead. Operand has 321 places, 357 transitions, 804 flow [2023-08-04 02:12:52,522 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 321 places, 357 transitions, 804 flow [2023-08-04 02:12:52,522 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:12:52,522 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 321 places, 357 transitions, 804 flow [2023-08-04 02:12:52,522 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 321 places, 357 transitions, 804 flow [2023-08-04 02:12:52,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 321 places, 357 transitions, 804 flow [2023-08-04 02:12:53,346 INFO L124 PetriNetUnfolderBase]: 938/4752 cut-off events. [2023-08-04 02:12:53,346 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:12:53,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5426 conditions, 4752 events. 938/4752 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 41389 event pairs, 22 based on Foata normal form. 0/4058 useless extension candidates. Maximal degree in co-relation 2850. Up to 192 conditions per place. [2023-08-04 02:12:53,621 INFO L119 LiptonReduction]: Number of co-enabled transitions 70380 [2023-08-04 02:13:01,642 INFO L134 LiptonReduction]: Checked pairs total: 88938 [2023-08-04 02:13:01,642 INFO L136 LiptonReduction]: Total number of compositions: 401 [2023-08-04 02:13:01,644 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:13:01,645 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;@492cc281, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:13:01,645 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:13:01,653 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:13:01,653 INFO L124 PetriNetUnfolderBase]: 6/98 cut-off events. [2023-08-04 02:13:01,653 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 02:13:01,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:13:01,653 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 02:13:01,653 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:13:01,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:13:01,654 INFO L85 PathProgramCache]: Analyzing trace with hash -3856424, now seen corresponding path program 1 times [2023-08-04 02:13:01,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:13:01,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384631229] [2023-08-04 02:13:01,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:01,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:13:01,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:01,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:13:01,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:13:01,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384631229] [2023-08-04 02:13:01,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384631229] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:13:01,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843330221] [2023-08-04 02:13:01,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:01,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:01,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:13:01,817 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 02:13:01,820 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 02:13:01,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:01,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:13:01,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:13:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:13:01,961 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:13:01,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843330221] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:13:01,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:13:01,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 02:13:01,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327392440] [2023-08-04 02:13:01,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:13:01,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:13:01,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:13:01,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:13:01,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:13:02,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 758 [2023-08-04 02:13:02,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 309.6) internal successors, (1548), 5 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states 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 02:13:02,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:13:02,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 758 [2023-08-04 02:13:02,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:13:06,313 INFO L124 PetriNetUnfolderBase]: 20172/30670 cut-off events. [2023-08-04 02:13:06,313 INFO L125 PetriNetUnfolderBase]: For 6363/6363 co-relation queries the response was YES. [2023-08-04 02:13:06,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64138 conditions, 30670 events. 20172/30670 cut-off events. For 6363/6363 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 196276 event pairs, 10808 based on Foata normal form. 0/28080 useless extension candidates. Maximal degree in co-relation 25479. Up to 28390 conditions per place. [2023-08-04 02:13:06,403 INFO L140 encePairwiseOnDemand]: 753/758 looper letters, 23 selfloop transitions, 5 changer transitions 31/64 dead transitions. [2023-08-04 02:13:06,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 64 transitions, 326 flow [2023-08-04 02:13:06,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:13:06,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:13:06,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1598 transitions. [2023-08-04 02:13:06,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4216358839050132 [2023-08-04 02:13:06,424 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1598 transitions. [2023-08-04 02:13:06,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1598 transitions. [2023-08-04 02:13:06,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:13:06,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1598 transitions. [2023-08-04 02:13:06,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 319.6) internal successors, (1598), 5 states have internal predecessors, (1598), 0 states have call successors, (0), 0 states 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 02:13:06,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states 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 02:13:06,453 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states 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 02:13:06,457 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 208 flow. Second operand 5 states and 1598 transitions. [2023-08-04 02:13:06,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 64 transitions, 326 flow [2023-08-04 02:13:06,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 64 transitions, 318 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:13:06,481 INFO L231 Difference]: Finished difference. Result has 55 places, 29 transitions, 105 flow [2023-08-04 02:13:06,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=105, PETRI_PLACES=55, PETRI_TRANSITIONS=29} [2023-08-04 02:13:06,485 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 1 predicate places. [2023-08-04 02:13:06,486 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 29 transitions, 105 flow [2023-08-04 02:13:06,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 309.6) internal successors, (1548), 5 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states 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 02:13:06,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:13:06,487 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 02:13:06,495 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 02:13:06,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:06,693 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:13:06,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:13:06,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1942329617, now seen corresponding path program 1 times [2023-08-04 02:13:06,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:13:06,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134698846] [2023-08-04 02:13:06,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:06,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:13:06,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:13:06,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:13:06,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134698846] [2023-08-04 02:13:06,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134698846] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:13:06,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:13:06,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:13:06,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530183131] [2023-08-04 02:13:06,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:13:06,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:13:06,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:13:06,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:13:06,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:13:06,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 758 [2023-08-04 02:13:06,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 29 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 311.0) internal successors, (933), 3 states have internal predecessors, (933), 0 states have call successors, (0), 0 states 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 02:13:06,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:13:06,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 758 [2023-08-04 02:13:06,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:13:07,275 INFO L124 PetriNetUnfolderBase]: 1984/3191 cut-off events. [2023-08-04 02:13:07,275 INFO L125 PetriNetUnfolderBase]: For 346/346 co-relation queries the response was YES. [2023-08-04 02:13:07,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6758 conditions, 3191 events. 1984/3191 cut-off events. For 346/346 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 15846 event pairs, 1498 based on Foata normal form. 1/3143 useless extension candidates. Maximal degree in co-relation 2883. Up to 2957 conditions per place. [2023-08-04 02:13:07,286 INFO L140 encePairwiseOnDemand]: 755/758 looper letters, 23 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2023-08-04 02:13:07,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 30 transitions, 156 flow [2023-08-04 02:13:07,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:13:07,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:13:07,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 952 transitions. [2023-08-04 02:13:07,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41864555848724716 [2023-08-04 02:13:07,290 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 952 transitions. [2023-08-04 02:13:07,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 952 transitions. [2023-08-04 02:13:07,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:13:07,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 952 transitions. [2023-08-04 02:13:07,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 317.3333333333333) internal successors, (952), 3 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:13:07,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states 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 02:13:07,299 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states 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 02:13:07,299 INFO L175 Difference]: Start difference. First operand has 55 places, 29 transitions, 105 flow. Second operand 3 states and 952 transitions. [2023-08-04 02:13:07,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 30 transitions, 156 flow [2023-08-04 02:13:07,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 30 transitions, 151 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 02:13:07,301 INFO L231 Difference]: Finished difference. Result has 43 places, 28 transitions, 99 flow [2023-08-04 02:13:07,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=43, PETRI_TRANSITIONS=28} [2023-08-04 02:13:07,302 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -11 predicate places. [2023-08-04 02:13:07,303 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 28 transitions, 99 flow [2023-08-04 02:13:07,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 311.0) internal successors, (933), 3 states have internal predecessors, (933), 0 states have call successors, (0), 0 states 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 02:13:07,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:13:07,303 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:13:07,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 02:13:07,304 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:13:07,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:13:07,304 INFO L85 PathProgramCache]: Analyzing trace with hash -273156651, now seen corresponding path program 1 times [2023-08-04 02:13:07,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:13:07,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763495025] [2023-08-04 02:13:07,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:07,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:13:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:07,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:13:07,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:13:07,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763495025] [2023-08-04 02:13:07,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763495025] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:13:07,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906257769] [2023-08-04 02:13:07,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:07,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:07,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:13:07,347 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 02:13:07,374 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 02:13:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:07,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:13:07,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:13:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:13:07,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:13:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:13:07,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906257769] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:13:07,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:13:07,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:13:07,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095082218] [2023-08-04 02:13:07,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:13:07,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:13:07,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:13:07,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:13:07,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:13:07,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 758 [2023-08-04 02:13:07,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 28 transitions, 99 flow. Second operand has 5 states, 5 states have (on average 310.6) internal successors, (1553), 5 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states 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 02:13:07,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:13:07,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 758 [2023-08-04 02:13:07,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:13:07,830 INFO L124 PetriNetUnfolderBase]: 1432/2243 cut-off events. [2023-08-04 02:13:07,830 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2023-08-04 02:13:07,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4683 conditions, 2243 events. 1432/2243 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9887 event pairs, 784 based on Foata normal form. 2/2212 useless extension candidates. Maximal degree in co-relation 2652. Up to 2073 conditions per place. [2023-08-04 02:13:07,840 INFO L140 encePairwiseOnDemand]: 755/758 looper letters, 23 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-08-04 02:13:07,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 31 transitions, 156 flow [2023-08-04 02:13:07,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:13:07,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:13:07,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1259 transitions. [2023-08-04 02:13:07,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41523746701846964 [2023-08-04 02:13:07,845 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1259 transitions. [2023-08-04 02:13:07,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1259 transitions. [2023-08-04 02:13:07,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:13:07,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1259 transitions. [2023-08-04 02:13:07,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 314.75) internal successors, (1259), 4 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states 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 02:13:07,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states 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 02:13:07,855 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states 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 02:13:07,855 INFO L175 Difference]: Start difference. First operand has 43 places, 28 transitions, 99 flow. Second operand 4 states and 1259 transitions. [2023-08-04 02:13:07,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 31 transitions, 156 flow [2023-08-04 02:13:07,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 31 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:13:07,856 INFO L231 Difference]: Finished difference. Result has 44 places, 27 transitions, 96 flow [2023-08-04 02:13:07,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=44, PETRI_TRANSITIONS=27} [2023-08-04 02:13:07,858 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -10 predicate places. [2023-08-04 02:13:07,858 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 27 transitions, 96 flow [2023-08-04 02:13:07,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 310.6) internal successors, (1553), 5 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states 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 02:13:07,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:13:07,862 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:13:07,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 02:13:08,067 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 02:13:08,068 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:13:08,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:13:08,068 INFO L85 PathProgramCache]: Analyzing trace with hash 205876058, now seen corresponding path program 1 times [2023-08-04 02:13:08,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:13:08,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292046366] [2023-08-04 02:13:08,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:08,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:13:08,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:13:08,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:13:08,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292046366] [2023-08-04 02:13:08,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292046366] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:13:08,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986143537] [2023-08-04 02:13:08,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:08,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:08,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:13:08,124 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 02:13:08,151 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 02:13:08,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:08,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:13:08,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:13:08,228 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:13:08,228 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:13:08,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986143537] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:13:08,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:13:08,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:13:08,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793624841] [2023-08-04 02:13:08,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:13:08,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:13:08,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:13:08,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:13:08,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:13:08,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 758 [2023-08-04 02:13:08,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 27 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 310.6) internal successors, (1553), 5 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states 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 02:13:08,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:13:08,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 758 [2023-08-04 02:13:08,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:13:08,587 INFO L124 PetriNetUnfolderBase]: 1400/2195 cut-off events. [2023-08-04 02:13:08,588 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2023-08-04 02:13:08,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4583 conditions, 2195 events. 1400/2195 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 9692 event pairs, 344 based on Foata normal form. 0/2178 useless extension candidates. Maximal degree in co-relation 2583. Up to 1904 conditions per place. [2023-08-04 02:13:08,597 INFO L140 encePairwiseOnDemand]: 754/758 looper letters, 30 selfloop transitions, 5 changer transitions 0/39 dead transitions. [2023-08-04 02:13:08,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 39 transitions, 188 flow [2023-08-04 02:13:08,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:13:08,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:13:08,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1575 transitions. [2023-08-04 02:13:08,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155672823218997 [2023-08-04 02:13:08,602 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1575 transitions. [2023-08-04 02:13:08,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1575 transitions. [2023-08-04 02:13:08,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:13:08,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1575 transitions. [2023-08-04 02:13:08,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states 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 02:13:08,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states 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 02:13:08,614 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states 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 02:13:08,614 INFO L175 Difference]: Start difference. First operand has 44 places, 27 transitions, 96 flow. Second operand 5 states and 1575 transitions. [2023-08-04 02:13:08,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 39 transitions, 188 flow [2023-08-04 02:13:08,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 181 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:13:08,617 INFO L231 Difference]: Finished difference. Result has 44 places, 29 transitions, 108 flow [2023-08-04 02:13:08,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=44, PETRI_TRANSITIONS=29} [2023-08-04 02:13:08,618 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -10 predicate places. [2023-08-04 02:13:08,618 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 29 transitions, 108 flow [2023-08-04 02:13:08,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 310.6) internal successors, (1553), 5 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states 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 02:13:08,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:13:08,619 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:13:08,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 02:13:08,824 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 02:13:08,824 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:13:08,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:13:08,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1357833501, now seen corresponding path program 1 times [2023-08-04 02:13:08,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:13:08,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500015261] [2023-08-04 02:13:08,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:08,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:13:08,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:13:08,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:13:08,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500015261] [2023-08-04 02:13:08,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500015261] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:13:08,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:13:08,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:13:08,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979084429] [2023-08-04 02:13:08,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:13:08,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:13:08,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:13:08,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:13:08,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:13:08,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 758 [2023-08-04 02:13:08,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 29 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 312.6666666666667) internal successors, (938), 3 states have internal predecessors, (938), 0 states have call successors, (0), 0 states 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 02:13:08,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:13:08,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 758 [2023-08-04 02:13:08,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:13:09,178 INFO L124 PetriNetUnfolderBase]: 1272/1967 cut-off events. [2023-08-04 02:13:09,179 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2023-08-04 02:13:09,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4164 conditions, 1967 events. 1272/1967 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 8213 event pairs, 992 based on Foata normal form. 4/1966 useless extension candidates. Maximal degree in co-relation 2335. Up to 1801 conditions per place. [2023-08-04 02:13:09,187 INFO L140 encePairwiseOnDemand]: 755/758 looper letters, 26 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-04 02:13:09,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 32 transitions, 169 flow [2023-08-04 02:13:09,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:13:09,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:13:09,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 954 transitions. [2023-08-04 02:13:09,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41952506596306066 [2023-08-04 02:13:09,191 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 954 transitions. [2023-08-04 02:13:09,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 954 transitions. [2023-08-04 02:13:09,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:13:09,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 954 transitions. [2023-08-04 02:13:09,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 318.0) internal successors, (954), 3 states have internal predecessors, (954), 0 states have call successors, (0), 0 states 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 02:13:09,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states 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 02:13:09,197 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states 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 02:13:09,198 INFO L175 Difference]: Start difference. First operand has 44 places, 29 transitions, 108 flow. Second operand 3 states and 954 transitions. [2023-08-04 02:13:09,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 32 transitions, 169 flow [2023-08-04 02:13:09,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 32 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:13:09,199 INFO L231 Difference]: Finished difference. Result has 45 places, 28 transitions, 106 flow [2023-08-04 02:13:09,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=28} [2023-08-04 02:13:09,200 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2023-08-04 02:13:09,200 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 28 transitions, 106 flow [2023-08-04 02:13:09,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 312.6666666666667) internal successors, (938), 3 states have internal predecessors, (938), 0 states have call successors, (0), 0 states 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 02:13:09,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:13:09,200 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:13:09,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 02:13:09,201 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:13:09,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:13:09,201 INFO L85 PathProgramCache]: Analyzing trace with hash 577905192, now seen corresponding path program 1 times [2023-08-04 02:13:09,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:13:09,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697162762] [2023-08-04 02:13:09,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:09,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:13:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:09,248 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:13:09,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:13:09,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697162762] [2023-08-04 02:13:09,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697162762] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:13:09,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180307535] [2023-08-04 02:13:09,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:09,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:09,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:13:09,250 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 02:13:09,253 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 02:13:09,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:09,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:13:09,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:13:09,347 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:13:09,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:13:09,361 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:13:09,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180307535] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:13:09,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:13:09,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:13:09,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890806320] [2023-08-04 02:13:09,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:13:09,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:13:09,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:13:09,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:13:09,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:13:09,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 758 [2023-08-04 02:13:09,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 28 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 311.6) internal successors, (1558), 5 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states 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 02:13:09,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:13:09,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 758 [2023-08-04 02:13:09,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:13:09,725 INFO L124 PetriNetUnfolderBase]: 936/1431 cut-off events. [2023-08-04 02:13:09,725 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2023-08-04 02:13:09,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3056 conditions, 1431 events. 936/1431 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5331 event pairs, 536 based on Foata normal form. 8/1434 useless extension candidates. Maximal degree in co-relation 1701. Up to 1225 conditions per place. [2023-08-04 02:13:09,732 INFO L140 encePairwiseOnDemand]: 755/758 looper letters, 28 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-08-04 02:13:09,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 35 transitions, 181 flow [2023-08-04 02:13:09,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:13:09,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:13:09,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1263 transitions. [2023-08-04 02:13:09,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41655672823219 [2023-08-04 02:13:09,737 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1263 transitions. [2023-08-04 02:13:09,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1263 transitions. [2023-08-04 02:13:09,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:13:09,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1263 transitions. [2023-08-04 02:13:09,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 315.75) internal successors, (1263), 4 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states 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 02:13:09,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states 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 02:13:09,747 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states 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 02:13:09,747 INFO L175 Difference]: Start difference. First operand has 45 places, 28 transitions, 106 flow. Second operand 4 states and 1263 transitions. [2023-08-04 02:13:09,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 35 transitions, 181 flow [2023-08-04 02:13:09,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 35 transitions, 177 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:13:09,749 INFO L231 Difference]: Finished difference. Result has 46 places, 27 transitions, 103 flow [2023-08-04 02:13:09,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=46, PETRI_TRANSITIONS=27} [2023-08-04 02:13:09,749 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -8 predicate places. [2023-08-04 02:13:09,749 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 27 transitions, 103 flow [2023-08-04 02:13:09,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 311.6) internal successors, (1558), 5 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states 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 02:13:09,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:13:09,750 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:13:09,758 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 02:13:09,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:09,956 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:13:09,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:13:09,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1199068334, now seen corresponding path program 1 times [2023-08-04 02:13:09,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:13:09,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243322329] [2023-08-04 02:13:09,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:09,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:13:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 02:13:10,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:13:10,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243322329] [2023-08-04 02:13:10,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243322329] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:13:10,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050319874] [2023-08-04 02:13:10,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:10,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:10,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:13:10,015 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 02:13:10,043 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 02:13:10,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:10,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:13:10,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:13:10,165 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 02:13:10,165 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:13:10,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050319874] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:13:10,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:13:10,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:13:10,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000025132] [2023-08-04 02:13:10,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:13:10,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:13:10,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:13:10,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:13:10,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:13:10,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 758 [2023-08-04 02:13:10,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 27 transitions, 103 flow. Second operand has 5 states, 5 states have (on average 311.6) internal successors, (1558), 5 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states 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 02:13:10,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:13:10,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 758 [2023-08-04 02:13:10,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:13:10,493 INFO L124 PetriNetUnfolderBase]: 744/1143 cut-off events. [2023-08-04 02:13:10,494 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2023-08-04 02:13:10,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2496 conditions, 1143 events. 744/1143 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3992 event pairs, 104 based on Foata normal form. 64/1202 useless extension candidates. Maximal degree in co-relation 1399. Up to 448 conditions per place. [2023-08-04 02:13:10,497 INFO L140 encePairwiseOnDemand]: 755/758 looper letters, 0 selfloop transitions, 0 changer transitions 43/43 dead transitions. [2023-08-04 02:13:10,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 43 transitions, 213 flow [2023-08-04 02:13:10,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:13:10,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:13:10,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1579 transitions. [2023-08-04 02:13:10,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.416622691292876 [2023-08-04 02:13:10,502 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1579 transitions. [2023-08-04 02:13:10,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1579 transitions. [2023-08-04 02:13:10,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:13:10,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1579 transitions. [2023-08-04 02:13:10,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 315.8) internal successors, (1579), 5 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states 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 02:13:10,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states 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 02:13:10,513 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 758.0) internal successors, (4548), 6 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states 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 02:13:10,513 INFO L175 Difference]: Start difference. First operand has 46 places, 27 transitions, 103 flow. Second operand 5 states and 1579 transitions. [2023-08-04 02:13:10,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 43 transitions, 213 flow [2023-08-04 02:13:10,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 206 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:13:10,515 INFO L231 Difference]: Finished difference. Result has 45 places, 0 transitions, 0 flow [2023-08-04 02:13:10,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=45, PETRI_TRANSITIONS=0} [2023-08-04 02:13:10,517 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2023-08-04 02:13:10,517 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 0 transitions, 0 flow [2023-08-04 02:13:10,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 311.6) internal successors, (1558), 5 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states 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 02:13:10,518 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 02:13:10,518 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 02:13:10,518 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 02:13:10,524 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 02:13:10,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:10,724 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:13:10,724 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 02:13:10,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 321 places, 357 transitions, 804 flow [2023-08-04 02:13:11,371 INFO L124 PetriNetUnfolderBase]: 938/4752 cut-off events. [2023-08-04 02:13:11,371 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:13:11,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5426 conditions, 4752 events. 938/4752 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 41389 event pairs, 22 based on Foata normal form. 0/4058 useless extension candidates. Maximal degree in co-relation 2850. Up to 192 conditions per place. [2023-08-04 02:13:11,456 INFO L82 GeneralOperation]: Start removeDead. Operand has 321 places, 357 transitions, 804 flow [2023-08-04 02:13:11,493 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 321 places, 357 transitions, 804 flow [2023-08-04 02:13:11,493 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:13:11,493 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 321 places, 357 transitions, 804 flow [2023-08-04 02:13:11,494 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 321 places, 357 transitions, 804 flow [2023-08-04 02:13:11,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 321 places, 357 transitions, 804 flow [2023-08-04 02:13:12,084 INFO L124 PetriNetUnfolderBase]: 938/4752 cut-off events. [2023-08-04 02:13:12,084 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:13:12,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5426 conditions, 4752 events. 938/4752 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 41389 event pairs, 22 based on Foata normal form. 0/4058 useless extension candidates. Maximal degree in co-relation 2850. Up to 192 conditions per place. [2023-08-04 02:13:12,336 INFO L119 LiptonReduction]: Number of co-enabled transitions 70380 [2023-08-04 02:13:19,387 INFO L134 LiptonReduction]: Checked pairs total: 89641 [2023-08-04 02:13:19,387 INFO L136 LiptonReduction]: Total number of compositions: 401 [2023-08-04 02:13:19,388 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 02:13:19,389 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;@492cc281, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:13:19,389 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 02:13:19,392 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:13:19,392 INFO L124 PetriNetUnfolderBase]: 0/25 cut-off events. [2023-08-04 02:13:19,392 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 02:13:19,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:13:19,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:13:19,392 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:13:19,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:13:19,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1620695934, now seen corresponding path program 1 times [2023-08-04 02:13:19,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:13:19,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828389968] [2023-08-04 02:13:19,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:19,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:13:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:19,415 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 02:13:19,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:13:19,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828389968] [2023-08-04 02:13:19,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828389968] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:13:19,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:13:19,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:13:19,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499018895] [2023-08-04 02:13:19,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:13:19,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:13:19,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:13:19,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:13:19,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:13:19,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 758 [2023-08-04 02:13:19,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 311.3333333333333) internal successors, (934), 3 states have internal predecessors, (934), 0 states have call successors, (0), 0 states 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 02:13:19,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:13:19,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 758 [2023-08-04 02:13:19,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:13:22,533 INFO L124 PetriNetUnfolderBase]: 19931/29965 cut-off events. [2023-08-04 02:13:22,533 INFO L125 PetriNetUnfolderBase]: For 7068/7068 co-relation queries the response was YES. [2023-08-04 02:13:22,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62896 conditions, 29965 events. 19931/29965 cut-off events. For 7068/7068 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 187954 event pairs, 13302 based on Foata normal form. 0/27393 useless extension candidates. Maximal degree in co-relation 25306. Up to 28006 conditions per place. [2023-08-04 02:13:22,654 INFO L140 encePairwiseOnDemand]: 754/758 looper letters, 50 selfloop transitions, 2 changer transitions 3/61 dead transitions. [2023-08-04 02:13:22,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 316 flow [2023-08-04 02:13:22,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:13:22,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:13:22,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 981 transitions. [2023-08-04 02:13:22,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4313984168865435 [2023-08-04 02:13:22,658 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 981 transitions. [2023-08-04 02:13:22,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 981 transitions. [2023-08-04 02:13:22,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:13:22,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 981 transitions. [2023-08-04 02:13:22,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 327.0) internal successors, (981), 3 states have internal predecessors, (981), 0 states have call successors, (0), 0 states 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 02:13:22,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states 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 02:13:22,664 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states 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 02:13:22,664 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 208 flow. Second operand 3 states and 981 transitions. [2023-08-04 02:13:22,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 316 flow [2023-08-04 02:13:22,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 61 transitions, 316 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:13:22,678 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 200 flow [2023-08-04 02:13:22,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2023-08-04 02:13:22,689 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2023-08-04 02:13:22,689 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 200 flow [2023-08-04 02:13:22,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 311.3333333333333) internal successors, (934), 3 states have internal predecessors, (934), 0 states have call successors, (0), 0 states 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 02:13:22,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:13:22,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:13:22,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 02:13:22,691 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:13:22,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:13:22,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1526882529, now seen corresponding path program 1 times [2023-08-04 02:13:22,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:13:22,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762103199] [2023-08-04 02:13:22,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:22,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:13:22,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:22,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:13:22,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:13:22,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762103199] [2023-08-04 02:13:22,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762103199] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:13:22,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012090074] [2023-08-04 02:13:22,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:22,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:22,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:13:22,739 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 02:13:22,762 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 02:13:22,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:22,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:13:22,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:13:22,820 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 02:13:22,820 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:13:22,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012090074] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:13:22,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:13:22,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:13:22,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131401867] [2023-08-04 02:13:22,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:13:22,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:13:22,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:13:22,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:13:22,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:13:22,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 758 [2023-08-04 02:13:22,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 312.3333333333333) internal successors, (937), 3 states have internal predecessors, (937), 0 states have call successors, (0), 0 states 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 02:13:22,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:13:22,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 758 [2023-08-04 02:13:22,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:13:25,655 INFO L124 PetriNetUnfolderBase]: 19717/29517 cut-off events. [2023-08-04 02:13:25,655 INFO L125 PetriNetUnfolderBase]: For 6545/6545 co-relation queries the response was YES. [2023-08-04 02:13:25,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61935 conditions, 29517 events. 19717/29517 cut-off events. For 6545/6545 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 183973 event pairs, 13229 based on Foata normal form. 0/27023 useless extension candidates. Maximal degree in co-relation 61905. Up to 27632 conditions per place. [2023-08-04 02:13:25,772 INFO L140 encePairwiseOnDemand]: 755/758 looper letters, 53 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-04 02:13:25,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 320 flow [2023-08-04 02:13:25,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:13:25,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:13:25,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 982 transitions. [2023-08-04 02:13:25,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318381706244503 [2023-08-04 02:13:25,778 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 982 transitions. [2023-08-04 02:13:25,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 982 transitions. [2023-08-04 02:13:25,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:13:25,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 982 transitions. [2023-08-04 02:13:25,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 327.3333333333333) internal successors, (982), 3 states have internal predecessors, (982), 0 states have call successors, (0), 0 states 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 02:13:25,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states 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 02:13:25,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states 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 02:13:25,784 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 200 flow. Second operand 3 states and 982 transitions. [2023-08-04 02:13:25,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 320 flow [2023-08-04 02:13:25,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 306 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:13:25,802 INFO L231 Difference]: Finished difference. Result has 52 places, 57 transitions, 198 flow [2023-08-04 02:13:25,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=57} [2023-08-04 02:13:25,804 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -2 predicate places. [2023-08-04 02:13:25,804 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 57 transitions, 198 flow [2023-08-04 02:13:25,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 312.3333333333333) internal successors, (937), 3 states have internal predecessors, (937), 0 states have call successors, (0), 0 states 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 02:13:25,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:13:25,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:13:25,813 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 02:13:26,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:26,009 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:13:26,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:13:26,009 INFO L85 PathProgramCache]: Analyzing trace with hash -9281956, now seen corresponding path program 1 times [2023-08-04 02:13:26,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:13:26,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335629787] [2023-08-04 02:13:26,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:26,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:13:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:26,047 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 02:13:26,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:13:26,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335629787] [2023-08-04 02:13:26,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335629787] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:13:26,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970602248] [2023-08-04 02:13:26,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:26,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:26,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:13:26,049 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 02:13:26,051 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 02:13:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:26,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:13:26,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:13:26,137 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 02:13:26,137 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:13:26,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970602248] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:13:26,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:13:26,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:13:26,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066905644] [2023-08-04 02:13:26,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:13:26,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:13:26,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:13:26,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:13:26,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:13:26,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 758 [2023-08-04 02:13:26,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 57 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 313.3333333333333) internal successors, (940), 3 states have internal predecessors, (940), 0 states have call successors, (0), 0 states 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 02:13:26,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:13:26,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 758 [2023-08-04 02:13:26,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:13:28,835 INFO L124 PetriNetUnfolderBase]: 19681/29763 cut-off events. [2023-08-04 02:13:28,835 INFO L125 PetriNetUnfolderBase]: For 2634/2634 co-relation queries the response was YES. [2023-08-04 02:13:28,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62148 conditions, 29763 events. 19681/29763 cut-off events. For 2634/2634 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 188827 event pairs, 13174 based on Foata normal form. 0/27353 useless extension candidates. Maximal degree in co-relation 27274. Up to 27256 conditions per place. [2023-08-04 02:13:28,965 INFO L140 encePairwiseOnDemand]: 755/758 looper letters, 56 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-04 02:13:28,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 64 transitions, 328 flow [2023-08-04 02:13:28,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:13:28,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:13:28,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 984 transitions. [2023-08-04 02:13:28,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43271767810026385 [2023-08-04 02:13:28,967 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 984 transitions. [2023-08-04 02:13:28,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 984 transitions. [2023-08-04 02:13:28,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:13:28,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 984 transitions. [2023-08-04 02:13:28,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 328.0) internal successors, (984), 3 states have internal predecessors, (984), 0 states have call successors, (0), 0 states 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 02:13:28,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states 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 02:13:28,973 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states 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 02:13:28,973 INFO L175 Difference]: Start difference. First operand has 52 places, 57 transitions, 198 flow. Second operand 3 states and 984 transitions. [2023-08-04 02:13:28,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 64 transitions, 328 flow [2023-08-04 02:13:28,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 64 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:13:28,976 INFO L231 Difference]: Finished difference. Result has 54 places, 58 transitions, 208 flow [2023-08-04 02:13:28,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=54, PETRI_TRANSITIONS=58} [2023-08-04 02:13:28,977 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2023-08-04 02:13:28,977 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 58 transitions, 208 flow [2023-08-04 02:13:28,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 313.3333333333333) internal successors, (940), 3 states have internal predecessors, (940), 0 states have call successors, (0), 0 states 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 02:13:28,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:13:28,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:13:28,985 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 02:13:29,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:29,185 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:13:29,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:13:29,185 INFO L85 PathProgramCache]: Analyzing trace with hash 941686596, now seen corresponding path program 1 times [2023-08-04 02:13:29,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:13:29,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856061738] [2023-08-04 02:13:29,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:29,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:13:29,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:29,226 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 02:13:29,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:13:29,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856061738] [2023-08-04 02:13:29,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856061738] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:13:29,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878818781] [2023-08-04 02:13:29,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:29,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:29,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:13:29,228 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:13:29,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 02:13:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:29,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:13:29,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:13:29,318 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 02:13:29,318 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:13:29,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878818781] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:13:29,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:13:29,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:13:29,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765441171] [2023-08-04 02:13:29,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:13:29,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:13:29,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:13:29,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:13:29,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:13:29,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 758 [2023-08-04 02:13:29,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 58 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 314.3333333333333) internal successors, (943), 3 states have internal predecessors, (943), 0 states have call successors, (0), 0 states 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 02:13:29,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:13:29,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 758 [2023-08-04 02:13:29,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:13:32,338 INFO L124 PetriNetUnfolderBase]: 18785/28651 cut-off events. [2023-08-04 02:13:32,339 INFO L125 PetriNetUnfolderBase]: For 2910/2910 co-relation queries the response was YES. [2023-08-04 02:13:32,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60517 conditions, 28651 events. 18785/28651 cut-off events. For 2910/2910 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 183926 event pairs, 13063 based on Foata normal form. 0/26649 useless extension candidates. Maximal degree in co-relation 28822. Up to 23580 conditions per place. [2023-08-04 02:13:32,452 INFO L140 encePairwiseOnDemand]: 755/758 looper letters, 64 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-08-04 02:13:32,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 72 transitions, 383 flow [2023-08-04 02:13:32,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:13:32,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:13:32,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 991 transitions. [2023-08-04 02:13:32,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43579595426561124 [2023-08-04 02:13:32,454 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 991 transitions. [2023-08-04 02:13:32,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 991 transitions. [2023-08-04 02:13:32,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:13:32,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 991 transitions. [2023-08-04 02:13:32,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 330.3333333333333) internal successors, (991), 3 states have internal predecessors, (991), 0 states have call successors, (0), 0 states 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 02:13:32,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states 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 02:13:32,459 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states 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 02:13:32,459 INFO L175 Difference]: Start difference. First operand has 54 places, 58 transitions, 208 flow. Second operand 3 states and 991 transitions. [2023-08-04 02:13:32,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 72 transitions, 383 flow [2023-08-04 02:13:32,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 72 transitions, 381 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:13:32,468 INFO L231 Difference]: Finished difference. Result has 56 places, 59 transitions, 218 flow [2023-08-04 02:13:32,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=56, PETRI_TRANSITIONS=59} [2023-08-04 02:13:32,469 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2023-08-04 02:13:32,469 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 59 transitions, 218 flow [2023-08-04 02:13:32,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 314.3333333333333) internal successors, (943), 3 states have internal predecessors, (943), 0 states have call successors, (0), 0 states 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 02:13:32,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:13:32,470 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 02:13:32,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 02:13:32,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-04 02:13:32,675 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:13:32,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:13:32,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1928458880, now seen corresponding path program 1 times [2023-08-04 02:13:32,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:13:32,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701294997] [2023-08-04 02:13:32,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:32,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:13:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:32,729 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 02:13:32,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:13:32,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701294997] [2023-08-04 02:13:32,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701294997] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:13:32,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139085057] [2023-08-04 02:13:32,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:32,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:32,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:13:32,732 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:13:32,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 02:13:32,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:32,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:13:32,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:13:32,840 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 02:13:32,841 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:13:32,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139085057] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:13:32,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:13:32,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:13:32,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52355939] [2023-08-04 02:13:32,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:13:32,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:13:32,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:13:32,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:13:32,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:13:32,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 758 [2023-08-04 02:13:32,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 59 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 315.6666666666667) internal successors, (947), 3 states have internal predecessors, (947), 0 states have call successors, (0), 0 states 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 02:13:32,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:13:32,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 758 [2023-08-04 02:13:32,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:13:35,526 INFO L124 PetriNetUnfolderBase]: 18576/28798 cut-off events. [2023-08-04 02:13:35,526 INFO L125 PetriNetUnfolderBase]: For 4852/4852 co-relation queries the response was YES. [2023-08-04 02:13:35,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63359 conditions, 28798 events. 18576/28798 cut-off events. For 4852/4852 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 186611 event pairs, 12252 based on Foata normal form. 0/27845 useless extension candidates. Maximal degree in co-relation 32424. Up to 20868 conditions per place. [2023-08-04 02:13:35,671 INFO L140 encePairwiseOnDemand]: 755/758 looper letters, 65 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-08-04 02:13:35,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 73 transitions, 395 flow [2023-08-04 02:13:35,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:13:35,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:13:35,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 991 transitions. [2023-08-04 02:13:35,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43579595426561124 [2023-08-04 02:13:35,673 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 991 transitions. [2023-08-04 02:13:35,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 991 transitions. [2023-08-04 02:13:35,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:13:35,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 991 transitions. [2023-08-04 02:13:35,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 330.3333333333333) internal successors, (991), 3 states have internal predecessors, (991), 0 states have call successors, (0), 0 states 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 02:13:35,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states 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 02:13:35,677 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states 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 02:13:35,677 INFO L175 Difference]: Start difference. First operand has 56 places, 59 transitions, 218 flow. Second operand 3 states and 991 transitions. [2023-08-04 02:13:35,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 73 transitions, 395 flow [2023-08-04 02:13:35,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 73 transitions, 393 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:13:35,695 INFO L231 Difference]: Finished difference. Result has 58 places, 60 transitions, 228 flow [2023-08-04 02:13:35,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=58, PETRI_TRANSITIONS=60} [2023-08-04 02:13:35,695 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 4 predicate places. [2023-08-04 02:13:35,695 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 60 transitions, 228 flow [2023-08-04 02:13:35,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 315.6666666666667) internal successors, (947), 3 states have internal predecessors, (947), 0 states have call successors, (0), 0 states 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 02:13:35,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:13:35,696 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] [2023-08-04 02:13:35,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-04 02:13:35,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 02:13:35,901 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:13:35,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:13:35,901 INFO L85 PathProgramCache]: Analyzing trace with hash 647938745, now seen corresponding path program 1 times [2023-08-04 02:13:35,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:13:35,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429469197] [2023-08-04 02:13:35,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:35,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:13:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:35,953 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 02:13:35,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:13:35,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429469197] [2023-08-04 02:13:35,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429469197] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:13:35,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816011386] [2023-08-04 02:13:35,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:35,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:35,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:13:35,955 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:13:35,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 02:13:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:36,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:13:36,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:13:36,059 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 02:13:36,059 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:13:36,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816011386] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:13:36,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:13:36,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 02:13:36,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388167053] [2023-08-04 02:13:36,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:13:36,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:13:36,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:13:36,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:13:36,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:13:36,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 758 [2023-08-04 02:13:36,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 60 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 317.0) internal successors, (951), 3 states have internal predecessors, (951), 0 states have call successors, (0), 0 states 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 02:13:36,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:13:36,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 758 [2023-08-04 02:13:36,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:13:38,902 INFO L124 PetriNetUnfolderBase]: 18847/29441 cut-off events. [2023-08-04 02:13:38,902 INFO L125 PetriNetUnfolderBase]: For 5944/5944 co-relation queries the response was YES. [2023-08-04 02:13:38,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66720 conditions, 29441 events. 18847/29441 cut-off events. For 5944/5944 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 191013 event pairs, 14123 based on Foata normal form. 0/29201 useless extension candidates. Maximal degree in co-relation 35088. Up to 23742 conditions per place. [2023-08-04 02:13:39,036 INFO L140 encePairwiseOnDemand]: 755/758 looper letters, 66 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-04 02:13:39,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 74 transitions, 407 flow [2023-08-04 02:13:39,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:13:39,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:13:39,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 991 transitions. [2023-08-04 02:13:39,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43579595426561124 [2023-08-04 02:13:39,038 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 991 transitions. [2023-08-04 02:13:39,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 991 transitions. [2023-08-04 02:13:39,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:13:39,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 991 transitions. [2023-08-04 02:13:39,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 330.3333333333333) internal successors, (991), 3 states have internal predecessors, (991), 0 states have call successors, (0), 0 states 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 02:13:39,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states 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 02:13:39,043 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 758.0) internal successors, (3032), 4 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states 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 02:13:39,043 INFO L175 Difference]: Start difference. First operand has 58 places, 60 transitions, 228 flow. Second operand 3 states and 991 transitions. [2023-08-04 02:13:39,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 74 transitions, 407 flow [2023-08-04 02:13:39,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 74 transitions, 405 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:13:39,198 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 238 flow [2023-08-04 02:13:39,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2023-08-04 02:13:39,198 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 6 predicate places. [2023-08-04 02:13:39,198 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 238 flow [2023-08-04 02:13:39,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 317.0) internal successors, (951), 3 states have internal predecessors, (951), 0 states have call successors, (0), 0 states 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 02:13:39,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:13:39,199 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] [2023-08-04 02:13:39,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 02:13:39,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 02:13:39,399 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:13:39,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:13:39,400 INFO L85 PathProgramCache]: Analyzing trace with hash -306661387, now seen corresponding path program 1 times [2023-08-04 02:13:39,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:13:39,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060611880] [2023-08-04 02:13:39,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:39,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:13:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:39,468 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 02:13:39,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:13:39,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060611880] [2023-08-04 02:13:39,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060611880] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:13:39,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164198596] [2023-08-04 02:13:39,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:39,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:39,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:13:39,470 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:13:39,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 02:13:39,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:39,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:13:39,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:13:39,587 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 02:13:39,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:13:39,604 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 02:13:39,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164198596] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:13:39,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:13:39,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:13:39,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191017046] [2023-08-04 02:13:39,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:13:39,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:13:39,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:13:39,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:13:39,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:13:39,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 758 [2023-08-04 02:13:39,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 238 flow. Second operand has 5 states, 5 states have (on average 314.4) internal successors, (1572), 5 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states 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 02:13:39,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:13:39,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 758 [2023-08-04 02:13:39,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:13:42,436 INFO L124 PetriNetUnfolderBase]: 17691/27603 cut-off events. [2023-08-04 02:13:42,436 INFO L125 PetriNetUnfolderBase]: For 5479/5479 co-relation queries the response was YES. [2023-08-04 02:13:42,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63363 conditions, 27603 events. 17691/27603 cut-off events. For 5479/5479 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 179963 event pairs, 10191 based on Foata normal form. 2/27600 useless extension candidates. Maximal degree in co-relation 48888. Up to 25640 conditions per place. [2023-08-04 02:13:42,563 INFO L140 encePairwiseOnDemand]: 754/758 looper letters, 56 selfloop transitions, 3 changer transitions 1/66 dead transitions. [2023-08-04 02:13:42,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 66 transitions, 368 flow [2023-08-04 02:13:42,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:13:42,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:13:42,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1288 transitions. [2023-08-04 02:13:42,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42480211081794195 [2023-08-04 02:13:42,566 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1288 transitions. [2023-08-04 02:13:42,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1288 transitions. [2023-08-04 02:13:42,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:13:42,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1288 transitions. [2023-08-04 02:13:42,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 322.0) internal successors, (1288), 4 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states 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 02:13:42,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states 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 02:13:42,570 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states 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 02:13:42,570 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 238 flow. Second operand 4 states and 1288 transitions. [2023-08-04 02:13:42,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 66 transitions, 368 flow [2023-08-04 02:13:42,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 66 transitions, 366 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:13:42,746 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 250 flow [2023-08-04 02:13:42,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=250, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2023-08-04 02:13:42,746 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 10 predicate places. [2023-08-04 02:13:42,747 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 250 flow [2023-08-04 02:13:42,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 314.4) internal successors, (1572), 5 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states 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 02:13:42,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:13:42,747 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:13:42,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 02:13:42,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 02:13:42,952 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:13:42,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:13:42,952 INFO L85 PathProgramCache]: Analyzing trace with hash 441055700, now seen corresponding path program 1 times [2023-08-04 02:13:42,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:13:42,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631974114] [2023-08-04 02:13:42,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:42,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:13:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:43,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 02:13:43,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:13:43,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631974114] [2023-08-04 02:13:43,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631974114] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:13:43,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999273493] [2023-08-04 02:13:43,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:43,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:43,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:13:43,023 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:13:43,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 02:13:43,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:43,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:13:43,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:13:43,142 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 02:13:43,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:13:43,154 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 02:13:43,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999273493] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:13:43,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:13:43,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:13:43,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586514246] [2023-08-04 02:13:43,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:13:43,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:13:43,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:13:43,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:13:43,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:13:43,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 758 [2023-08-04 02:13:43,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 250 flow. Second operand has 5 states, 5 states have (on average 314.6) internal successors, (1573), 5 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states 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 02:13:43,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:13:43,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 758 [2023-08-04 02:13:43,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:13:46,041 INFO L124 PetriNetUnfolderBase]: 16839/26275 cut-off events. [2023-08-04 02:13:46,041 INFO L125 PetriNetUnfolderBase]: For 4623/4623 co-relation queries the response was YES. [2023-08-04 02:13:46,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60198 conditions, 26275 events. 16839/26275 cut-off events. For 4623/4623 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 171176 event pairs, 9864 based on Foata normal form. 8/26278 useless extension candidates. Maximal degree in co-relation 45955. Up to 24296 conditions per place. [2023-08-04 02:13:46,160 INFO L140 encePairwiseOnDemand]: 754/758 looper letters, 60 selfloop transitions, 3 changer transitions 1/70 dead transitions. [2023-08-04 02:13:46,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 70 transitions, 396 flow [2023-08-04 02:13:46,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:13:46,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:13:46,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1292 transitions. [2023-08-04 02:13:46,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261213720316623 [2023-08-04 02:13:46,163 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1292 transitions. [2023-08-04 02:13:46,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1292 transitions. [2023-08-04 02:13:46,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:13:46,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1292 transitions. [2023-08-04 02:13:46,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states 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 02:13:46,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states 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 02:13:46,167 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states 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 02:13:46,167 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 250 flow. Second operand 4 states and 1292 transitions. [2023-08-04 02:13:46,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 70 transitions, 396 flow [2023-08-04 02:13:46,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 70 transitions, 386 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:13:46,296 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 254 flow [2023-08-04 02:13:46,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2023-08-04 02:13:46,296 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 12 predicate places. [2023-08-04 02:13:46,296 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 254 flow [2023-08-04 02:13:46,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 314.6) internal successors, (1573), 5 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states 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 02:13:46,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:13:46,297 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:13:46,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 02:13:46,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 02:13:46,502 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:13:46,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:13:46,502 INFO L85 PathProgramCache]: Analyzing trace with hash -754914938, now seen corresponding path program 1 times [2023-08-04 02:13:46,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:13:46,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676675837] [2023-08-04 02:13:46,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:46,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:13:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 02:13:46,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:13:46,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676675837] [2023-08-04 02:13:46,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676675837] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:13:46,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193487408] [2023-08-04 02:13:46,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:46,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:46,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:13:46,585 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:13:46,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 02:13:46,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:46,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:13:46,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:13:46,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 02:13:46,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:13:46,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 02:13:46,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193487408] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:13:46,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:13:46,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:13:46,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330119421] [2023-08-04 02:13:46,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:13:46,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:13:46,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:13:46,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:13:46,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:13:46,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 758 [2023-08-04 02:13:46,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 314.8) internal successors, (1574), 5 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states 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 02:13:46,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:13:46,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 758 [2023-08-04 02:13:46,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:13:49,216 INFO L124 PetriNetUnfolderBase]: 16407/25603 cut-off events. [2023-08-04 02:13:49,216 INFO L125 PetriNetUnfolderBase]: For 4364/4364 co-relation queries the response was YES. [2023-08-04 02:13:49,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58010 conditions, 25603 events. 16407/25603 cut-off events. For 4364/4364 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 165213 event pairs, 9523 based on Foata normal form. 32/25630 useless extension candidates. Maximal degree in co-relation 43949. Up to 22968 conditions per place. [2023-08-04 02:13:49,356 INFO L140 encePairwiseOnDemand]: 754/758 looper letters, 64 selfloop transitions, 3 changer transitions 1/74 dead transitions. [2023-08-04 02:13:49,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 74 transitions, 416 flow [2023-08-04 02:13:49,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:13:49,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:13:49,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1296 transitions. [2023-08-04 02:13:49,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42744063324538256 [2023-08-04 02:13:49,359 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1296 transitions. [2023-08-04 02:13:49,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1296 transitions. [2023-08-04 02:13:49,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:13:49,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1296 transitions. [2023-08-04 02:13:49,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states 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 02:13:49,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states 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 02:13:49,363 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states 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 02:13:49,363 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 254 flow. Second operand 4 states and 1296 transitions. [2023-08-04 02:13:49,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 74 transitions, 416 flow [2023-08-04 02:13:49,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 74 transitions, 406 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:13:49,502 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 258 flow [2023-08-04 02:13:49,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=258, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2023-08-04 02:13:49,502 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 14 predicate places. [2023-08-04 02:13:49,502 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 258 flow [2023-08-04 02:13:49,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 314.8) internal successors, (1574), 5 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states 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 02:13:49,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:13:49,503 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:13:49,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 02:13:49,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-04 02:13:49,709 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:13:49,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:13:49,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1618661445, now seen corresponding path program 1 times [2023-08-04 02:13:49,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:13:49,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957779681] [2023-08-04 02:13:49,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:49,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:13:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:13:49,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:13:49,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957779681] [2023-08-04 02:13:49,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957779681] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:13:49,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341483662] [2023-08-04 02:13:49,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:49,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:49,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:13:49,775 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:13:49,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 02:13:49,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:49,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:13:49,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:13:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:13:49,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:13:49,900 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:13:49,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341483662] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:13:49,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:13:49,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:13:49,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349091621] [2023-08-04 02:13:49,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:13:49,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:13:49,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:13:49,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:13:49,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:13:49,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 758 [2023-08-04 02:13:49,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 258 flow. Second operand has 5 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states 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 02:13:49,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:13:49,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 758 [2023-08-04 02:13:49,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:13:51,521 INFO L124 PetriNetUnfolderBase]: 10315/16383 cut-off events. [2023-08-04 02:13:51,521 INFO L125 PetriNetUnfolderBase]: For 3584/3584 co-relation queries the response was YES. [2023-08-04 02:13:51,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36927 conditions, 16383 events. 10315/16383 cut-off events. For 3584/3584 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 98866 event pairs, 5374 based on Foata normal form. 192/16570 useless extension candidates. Maximal degree in co-relation 32048. Up to 9425 conditions per place. [2023-08-04 02:13:51,588 INFO L140 encePairwiseOnDemand]: 754/758 looper letters, 71 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2023-08-04 02:13:51,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 81 transitions, 461 flow [2023-08-04 02:13:51,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:13:51,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:13:51,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1303 transitions. [2023-08-04 02:13:51,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42974934036939316 [2023-08-04 02:13:51,591 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1303 transitions. [2023-08-04 02:13:51,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1303 transitions. [2023-08-04 02:13:51,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:13:51,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1303 transitions. [2023-08-04 02:13:51,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 325.75) internal successors, (1303), 4 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states 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 02:13:51,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states 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 02:13:51,595 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states 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 02:13:51,595 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 258 flow. Second operand 4 states and 1303 transitions. [2023-08-04 02:13:51,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 81 transitions, 461 flow [2023-08-04 02:13:51,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 81 transitions, 450 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 02:13:51,662 INFO L231 Difference]: Finished difference. Result has 70 places, 62 transitions, 268 flow [2023-08-04 02:13:51,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=268, PETRI_PLACES=70, PETRI_TRANSITIONS=62} [2023-08-04 02:13:51,662 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 16 predicate places. [2023-08-04 02:13:51,662 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 62 transitions, 268 flow [2023-08-04 02:13:51,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states 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 02:13:51,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:13:51,663 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:13:51,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-04 02:13:51,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:51,863 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:13:51,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:13:51,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1166046111, now seen corresponding path program 1 times [2023-08-04 02:13:51,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:13:51,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324662675] [2023-08-04 02:13:51,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:51,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:13:51,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 02:13:51,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:13:51,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324662675] [2023-08-04 02:13:51,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324662675] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:13:51,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654381385] [2023-08-04 02:13:51,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:51,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:51,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:13:51,957 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:13:51,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 02:13:52,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:52,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:13:52,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:13:52,076 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 02:13:52,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:13:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 02:13:52,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654381385] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:13:52,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:13:52,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:13:52,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316519246] [2023-08-04 02:13:52,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:13:52,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:13:52,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:13:52,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:13:52,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:13:52,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 758 [2023-08-04 02:13:52,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 62 transitions, 268 flow. Second operand has 5 states, 5 states have (on average 315.4) internal successors, (1577), 5 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states 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 02:13:52,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:13:52,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 758 [2023-08-04 02:13:52,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:13:53,729 INFO L124 PetriNetUnfolderBase]: 9415/14912 cut-off events. [2023-08-04 02:13:53,730 INFO L125 PetriNetUnfolderBase]: For 6527/6527 co-relation queries the response was YES. [2023-08-04 02:13:53,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35765 conditions, 14912 events. 9415/14912 cut-off events. For 6527/6527 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 88010 event pairs, 5942 based on Foata normal form. 233/15140 useless extension candidates. Maximal degree in co-relation 34698. Up to 8732 conditions per place. [2023-08-04 02:13:53,771 INFO L140 encePairwiseOnDemand]: 754/758 looper letters, 72 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2023-08-04 02:13:53,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 82 transitions, 472 flow [2023-08-04 02:13:53,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:13:53,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:13:53,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1303 transitions. [2023-08-04 02:13:53,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42974934036939316 [2023-08-04 02:13:53,773 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1303 transitions. [2023-08-04 02:13:53,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1303 transitions. [2023-08-04 02:13:53,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:13:53,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1303 transitions. [2023-08-04 02:13:53,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 325.75) internal successors, (1303), 4 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states 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 02:13:53,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states 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 02:13:53,777 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states 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 02:13:53,777 INFO L175 Difference]: Start difference. First operand has 70 places, 62 transitions, 268 flow. Second operand 4 states and 1303 transitions. [2023-08-04 02:13:53,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 82 transitions, 472 flow [2023-08-04 02:13:53,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 82 transitions, 468 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:13:53,824 INFO L231 Difference]: Finished difference. Result has 74 places, 63 transitions, 284 flow [2023-08-04 02:13:53,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=284, PETRI_PLACES=74, PETRI_TRANSITIONS=63} [2023-08-04 02:13:53,825 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 20 predicate places. [2023-08-04 02:13:53,825 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 63 transitions, 284 flow [2023-08-04 02:13:53,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 315.4) internal successors, (1577), 5 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states 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 02:13:53,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:13:53,825 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:13:53,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-04 02:13:54,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:54,026 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:13:54,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:13:54,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1088158152, now seen corresponding path program 1 times [2023-08-04 02:13:54,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:13:54,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528400932] [2023-08-04 02:13:54,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:54,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:13:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 02:13:54,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:13:54,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528400932] [2023-08-04 02:13:54,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528400932] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:13:54,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142764398] [2023-08-04 02:13:54,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:54,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:54,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:13:54,094 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:13:54,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 02:13:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:54,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:13:54,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:13:54,244 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 02:13:54,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:13:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 02:13:54,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142764398] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:13:54,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:13:54,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:13:54,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990487192] [2023-08-04 02:13:54,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:13:54,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:13:54,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:13:54,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:13:54,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:13:54,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 758 [2023-08-04 02:13:54,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 63 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 315.8) internal successors, (1579), 5 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states 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 02:13:54,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:13:54,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 758 [2023-08-04 02:13:54,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:13:55,772 INFO L124 PetriNetUnfolderBase]: 9409/14895 cut-off events. [2023-08-04 02:13:55,773 INFO L125 PetriNetUnfolderBase]: For 7481/7481 co-relation queries the response was YES. [2023-08-04 02:13:55,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37434 conditions, 14895 events. 9409/14895 cut-off events. For 7481/7481 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 87873 event pairs, 8414 based on Foata normal form. 13/14903 useless extension candidates. Maximal degree in co-relation 36338. Up to 13453 conditions per place. [2023-08-04 02:13:55,856 INFO L140 encePairwiseOnDemand]: 754/758 looper letters, 71 selfloop transitions, 3 changer transitions 3/83 dead transitions. [2023-08-04 02:13:55,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 83 transitions, 490 flow [2023-08-04 02:13:55,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:13:55,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:13:55,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1303 transitions. [2023-08-04 02:13:55,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42974934036939316 [2023-08-04 02:13:55,859 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1303 transitions. [2023-08-04 02:13:55,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1303 transitions. [2023-08-04 02:13:55,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:13:55,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1303 transitions. [2023-08-04 02:13:55,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 325.75) internal successors, (1303), 4 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states 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 02:13:55,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states 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 02:13:55,864 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 758.0) internal successors, (3790), 5 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states 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 02:13:55,864 INFO L175 Difference]: Start difference. First operand has 74 places, 63 transitions, 284 flow. Second operand 4 states and 1303 transitions. [2023-08-04 02:13:55,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 83 transitions, 490 flow [2023-08-04 02:13:55,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 83 transitions, 486 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:13:55,988 INFO L231 Difference]: Finished difference. Result has 78 places, 61 transitions, 282 flow [2023-08-04 02:13:55,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=282, PETRI_PLACES=78, PETRI_TRANSITIONS=61} [2023-08-04 02:13:55,989 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 24 predicate places. [2023-08-04 02:13:55,989 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 61 transitions, 282 flow [2023-08-04 02:13:55,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 315.8) internal successors, (1579), 5 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states 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 02:13:55,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:13:55,989 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:13:55,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-04 02:13:56,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:56,190 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:13:56,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:13:56,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1672824358, now seen corresponding path program 1 times [2023-08-04 02:13:56,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:13:56,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305808002] [2023-08-04 02:13:56,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:56,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:13:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:57,190 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 02:13:57,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:13:57,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305808002] [2023-08-04 02:13:57,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305808002] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:13:57,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299068492] [2023-08-04 02:13:57,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:13:57,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:13:57,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:13:57,193 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:13:57,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-04 02:13:57,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:13:57,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-04 02:13:57,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:14:00,554 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 02:14:00,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:14:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 02:14:01,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299068492] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:14:01,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:14:01,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-08-04 02:14:01,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121955751] [2023-08-04 02:14:01,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:14:01,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-04 02:14:01,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:14:01,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-04 02:14:01,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-08-04 02:14:01,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 758 [2023-08-04 02:14:01,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 61 transitions, 282 flow. Second operand has 14 states, 14 states have (on average 283.2857142857143) internal successors, (3966), 14 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states 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 02:14:01,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:14:01,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 758 [2023-08-04 02:14:01,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:14:05,089 INFO L124 PetriNetUnfolderBase]: 14536/22742 cut-off events. [2023-08-04 02:14:05,089 INFO L125 PetriNetUnfolderBase]: For 15164/15164 co-relation queries the response was YES. [2023-08-04 02:14:05,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56249 conditions, 22742 events. 14536/22742 cut-off events. For 15164/15164 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 148258 event pairs, 2463 based on Foata normal form. 1/22619 useless extension candidates. Maximal degree in co-relation 55834. Up to 7483 conditions per place. [2023-08-04 02:14:05,193 INFO L140 encePairwiseOnDemand]: 750/758 looper letters, 206 selfloop transitions, 21 changer transitions 1/234 dead transitions. [2023-08-04 02:14:05,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 234 transitions, 1560 flow [2023-08-04 02:14:05,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 02:14:05,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 02:14:05,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2412 transitions. [2023-08-04 02:14:05,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39775725593667544 [2023-08-04 02:14:05,197 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2412 transitions. [2023-08-04 02:14:05,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2412 transitions. [2023-08-04 02:14:05,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:14:05,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2412 transitions. [2023-08-04 02:14:05,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 301.5) internal successors, (2412), 8 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states 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 02:14:05,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states 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 02:14:05,204 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states 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 02:14:05,204 INFO L175 Difference]: Start difference. First operand has 78 places, 61 transitions, 282 flow. Second operand 8 states and 2412 transitions. [2023-08-04 02:14:05,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 234 transitions, 1560 flow [2023-08-04 02:14:05,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 234 transitions, 1517 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-04 02:14:05,393 INFO L231 Difference]: Finished difference. Result has 86 places, 83 transitions, 425 flow [2023-08-04 02:14:05,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=425, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2023-08-04 02:14:05,393 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 32 predicate places. [2023-08-04 02:14:05,393 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 425 flow [2023-08-04 02:14:05,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 283.2857142857143) internal successors, (3966), 14 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states 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 02:14:05,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:14:05,394 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:14:05,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-04 02:14:05,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:14:05,595 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:14:05,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:14:05,595 INFO L85 PathProgramCache]: Analyzing trace with hash -884837030, now seen corresponding path program 1 times [2023-08-04 02:14:05,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:14:05,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889113685] [2023-08-04 02:14:05,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:14:05,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:14:05,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:14:06,442 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 02:14:06,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:14:06,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889113685] [2023-08-04 02:14:06,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889113685] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:14:06,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096841320] [2023-08-04 02:14:06,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:14:06,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:14:06,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:14:06,444 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:14:06,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-04 02:14:06,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:14:06,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 02:14:06,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:14:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-04 02:14:09,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:14:09,755 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-04 02:14:09,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096841320] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:14:09,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:14:09,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2023-08-04 02:14:09,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425301851] [2023-08-04 02:14:09,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:14:09,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-04 02:14:09,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:14:09,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-04 02:14:09,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-04 02:14:10,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 758 [2023-08-04 02:14:10,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 425 flow. Second operand has 12 states, 12 states have (on average 284.8333333333333) internal successors, (3418), 12 states have internal predecessors, (3418), 0 states have call successors, (0), 0 states 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 02:14:10,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:14:10,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 758 [2023-08-04 02:14:10,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:14:15,037 INFO L124 PetriNetUnfolderBase]: 21992/34987 cut-off events. [2023-08-04 02:14:15,038 INFO L125 PetriNetUnfolderBase]: For 82165/82165 co-relation queries the response was YES. [2023-08-04 02:14:15,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125843 conditions, 34987 events. 21992/34987 cut-off events. For 82165/82165 co-relation queries the response was YES. Maximal size of possible extension queue 991. Compared 250332 event pairs, 3112 based on Foata normal form. 1/34822 useless extension candidates. Maximal degree in co-relation 125034. Up to 12845 conditions per place. [2023-08-04 02:14:15,243 INFO L140 encePairwiseOnDemand]: 750/758 looper letters, 156 selfloop transitions, 15 changer transitions 57/234 dead transitions. [2023-08-04 02:14:15,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 234 transitions, 1672 flow [2023-08-04 02:14:15,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 02:14:15,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 02:14:15,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2407 transitions. [2023-08-04 02:14:15,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3969327176781003 [2023-08-04 02:14:15,247 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2407 transitions. [2023-08-04 02:14:15,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2407 transitions. [2023-08-04 02:14:15,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:14:15,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2407 transitions. [2023-08-04 02:14:15,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 300.875) internal successors, (2407), 8 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states 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 02:14:15,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states 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 02:14:15,253 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states 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 02:14:15,253 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 425 flow. Second operand 8 states and 2407 transitions. [2023-08-04 02:14:15,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 234 transitions, 1672 flow [2023-08-04 02:14:15,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 234 transitions, 1671 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:14:15,761 INFO L231 Difference]: Finished difference. Result has 95 places, 79 transitions, 454 flow [2023-08-04 02:14:15,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=454, PETRI_PLACES=95, PETRI_TRANSITIONS=79} [2023-08-04 02:14:15,762 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 41 predicate places. [2023-08-04 02:14:15,762 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 79 transitions, 454 flow [2023-08-04 02:14:15,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 284.8333333333333) internal successors, (3418), 12 states have internal predecessors, (3418), 0 states have call successors, (0), 0 states 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 02:14:15,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:14:15,763 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:14:15,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-04 02:14:15,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:14:15,963 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:14:15,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:14:15,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1025263898, now seen corresponding path program 2 times [2023-08-04 02:14:15,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:14:15,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613729574] [2023-08-04 02:14:15,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:14:15,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:14:16,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:14:16,931 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 02:14:16,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:14:16,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613729574] [2023-08-04 02:14:16,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613729574] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:14:16,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100456693] [2023-08-04 02:14:16,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 02:14:16,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:14:16,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:14:16,939 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:14:16,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-04 02:14:17,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 02:14:17,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:14:17,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 02:14:17,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:14:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 02:14:19,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:14:20,431 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 02:14:20,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100456693] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:14:20,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:14:20,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2023-08-04 02:14:20,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957100973] [2023-08-04 02:14:20,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:14:20,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-04 02:14:20,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:14:20,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-04 02:14:20,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-04 02:14:20,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 758 [2023-08-04 02:14:20,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 79 transitions, 454 flow. Second operand has 12 states, 12 states have (on average 283.9166666666667) internal successors, (3407), 12 states have internal predecessors, (3407), 0 states have call successors, (0), 0 states 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 02:14:20,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:14:20,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 758 [2023-08-04 02:14:20,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:14:24,479 INFO L124 PetriNetUnfolderBase]: 14128/25205 cut-off events. [2023-08-04 02:14:24,479 INFO L125 PetriNetUnfolderBase]: For 82008/82008 co-relation queries the response was YES. [2023-08-04 02:14:24,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96259 conditions, 25205 events. 14128/25205 cut-off events. For 82008/82008 co-relation queries the response was YES. Maximal size of possible extension queue 836. Compared 202486 event pairs, 2623 based on Foata normal form. 1/25117 useless extension candidates. Maximal degree in co-relation 96209. Up to 12117 conditions per place. [2023-08-04 02:14:24,594 INFO L140 encePairwiseOnDemand]: 750/758 looper letters, 184 selfloop transitions, 21 changer transitions 23/234 dead transitions. [2023-08-04 02:14:24,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 234 transitions, 1777 flow [2023-08-04 02:14:24,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 02:14:24,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 02:14:24,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2398 transitions. [2023-08-04 02:14:24,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3954485488126649 [2023-08-04 02:14:24,597 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2398 transitions. [2023-08-04 02:14:24,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2398 transitions. [2023-08-04 02:14:24,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:14:24,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2398 transitions. [2023-08-04 02:14:24,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 299.75) internal successors, (2398), 8 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states 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 02:14:24,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states 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 02:14:24,604 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states 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 02:14:24,604 INFO L175 Difference]: Start difference. First operand has 95 places, 79 transitions, 454 flow. Second operand 8 states and 2398 transitions. [2023-08-04 02:14:24,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 234 transitions, 1777 flow [2023-08-04 02:14:24,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 234 transitions, 1725 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-08-04 02:14:24,981 INFO L231 Difference]: Finished difference. Result has 99 places, 89 transitions, 600 flow [2023-08-04 02:14:24,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=600, PETRI_PLACES=99, PETRI_TRANSITIONS=89} [2023-08-04 02:14:24,981 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 45 predicate places. [2023-08-04 02:14:24,982 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 89 transitions, 600 flow [2023-08-04 02:14:24,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 283.9166666666667) internal successors, (3407), 12 states have internal predecessors, (3407), 0 states have call successors, (0), 0 states 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 02:14:24,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:14:24,982 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:14:24,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-04 02:14:25,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:14:25,183 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:14:25,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:14:25,183 INFO L85 PathProgramCache]: Analyzing trace with hash 624486344, now seen corresponding path program 1 times [2023-08-04 02:14:25,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:14:25,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23046766] [2023-08-04 02:14:25,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:14:25,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:14:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:14:25,891 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 02:14:25,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:14:25,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23046766] [2023-08-04 02:14:25,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23046766] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:14:25,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562755577] [2023-08-04 02:14:25,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:14:25,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:14:25,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:14:25,893 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:14:26,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-04 02:14:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:14:26,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-04 02:14:26,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:14:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 02:14:28,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:14:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 02:14:28,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562755577] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:14:28,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:14:28,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 11 [2023-08-04 02:14:28,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103643822] [2023-08-04 02:14:28,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:14:28,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-04 02:14:28,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:14:28,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-04 02:14:28,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-08-04 02:14:29,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 758 [2023-08-04 02:14:29,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 89 transitions, 600 flow. Second operand has 12 states, 12 states have (on average 286.9166666666667) internal successors, (3443), 12 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states 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 02:14:29,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:14:29,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 758 [2023-08-04 02:14:29,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:14:34,307 INFO L124 PetriNetUnfolderBase]: 20422/37462 cut-off events. [2023-08-04 02:14:34,307 INFO L125 PetriNetUnfolderBase]: For 227997/227997 co-relation queries the response was YES. [2023-08-04 02:14:34,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167655 conditions, 37462 events. 20422/37462 cut-off events. For 227997/227997 co-relation queries the response was YES. Maximal size of possible extension queue 1285. Compared 335455 event pairs, 3147 based on Foata normal form. 5/37298 useless extension candidates. Maximal degree in co-relation 167591. Up to 12214 conditions per place. [2023-08-04 02:14:34,648 INFO L140 encePairwiseOnDemand]: 750/758 looper letters, 227 selfloop transitions, 27 changer transitions 63/323 dead transitions. [2023-08-04 02:14:34,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 323 transitions, 2649 flow [2023-08-04 02:14:34,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-04 02:14:34,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-04 02:14:34,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3057 transitions. [2023-08-04 02:14:34,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032981530343008 [2023-08-04 02:14:34,653 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3057 transitions. [2023-08-04 02:14:34,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3057 transitions. [2023-08-04 02:14:34,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:14:34,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3057 transitions. [2023-08-04 02:14:34,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 305.7) internal successors, (3057), 10 states have internal predecessors, (3057), 0 states have call successors, (0), 0 states 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 02:14:34,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 758.0) internal successors, (8338), 11 states have internal predecessors, (8338), 0 states have call successors, (0), 0 states 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 02:14:34,662 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 758.0) internal successors, (8338), 11 states have internal predecessors, (8338), 0 states have call successors, (0), 0 states 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 02:14:34,662 INFO L175 Difference]: Start difference. First operand has 99 places, 89 transitions, 600 flow. Second operand 10 states and 3057 transitions. [2023-08-04 02:14:34,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 323 transitions, 2649 flow [2023-08-04 02:14:36,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 323 transitions, 2603 flow, removed 20 selfloop flow, removed 2 redundant places. [2023-08-04 02:14:36,833 INFO L231 Difference]: Finished difference. Result has 110 places, 99 transitions, 802 flow [2023-08-04 02:14:36,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=802, PETRI_PLACES=110, PETRI_TRANSITIONS=99} [2023-08-04 02:14:36,834 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 56 predicate places. [2023-08-04 02:14:36,834 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 99 transitions, 802 flow [2023-08-04 02:14:36,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 286.9166666666667) internal successors, (3443), 12 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states 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 02:14:36,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:14:36,835 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:14:36,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-04 02:14:37,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-04 02:14:37,035 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:14:37,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:14:37,036 INFO L85 PathProgramCache]: Analyzing trace with hash -175756052, now seen corresponding path program 1 times [2023-08-04 02:14:37,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:14:37,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755229567] [2023-08-04 02:14:37,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:14:37,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:14:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:14:37,779 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 02:14:37,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:14:37,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755229567] [2023-08-04 02:14:37,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755229567] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:14:37,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204503158] [2023-08-04 02:14:37,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:14:37,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:14:37,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:14:37,781 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:14:37,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-04 02:14:37,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:14:37,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 02:14:37,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:14:39,380 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 02:14:39,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:14:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 02:14:39,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204503158] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:14:39,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:14:39,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2023-08-04 02:14:39,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990106240] [2023-08-04 02:14:39,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:14:39,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-04 02:14:39,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:14:39,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-04 02:14:39,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-04 02:14:40,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 758 [2023-08-04 02:14:40,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 99 transitions, 802 flow. Second operand has 12 states, 12 states have (on average 283.0833333333333) internal successors, (3397), 12 states have internal predecessors, (3397), 0 states have call successors, (0), 0 states 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 02:14:40,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:14:40,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 758 [2023-08-04 02:14:40,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:14:44,929 INFO L124 PetriNetUnfolderBase]: 16624/31172 cut-off events. [2023-08-04 02:14:44,930 INFO L125 PetriNetUnfolderBase]: For 243233/243233 co-relation queries the response was YES. [2023-08-04 02:14:45,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148657 conditions, 31172 events. 16624/31172 cut-off events. For 243233/243233 co-relation queries the response was YES. Maximal size of possible extension queue 1091. Compared 277090 event pairs, 3574 based on Foata normal form. 3/31073 useless extension candidates. Maximal degree in co-relation 148610. Up to 13672 conditions per place. [2023-08-04 02:14:45,155 INFO L140 encePairwiseOnDemand]: 750/758 looper letters, 98 selfloop transitions, 9 changer transitions 106/219 dead transitions. [2023-08-04 02:14:45,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 219 transitions, 1885 flow [2023-08-04 02:14:45,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 02:14:45,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 02:14:45,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2381 transitions. [2023-08-04 02:14:45,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3926451187335092 [2023-08-04 02:14:45,157 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2381 transitions. [2023-08-04 02:14:45,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2381 transitions. [2023-08-04 02:14:45,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:14:45,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2381 transitions. [2023-08-04 02:14:45,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 297.625) internal successors, (2381), 8 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states 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 02:14:45,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states 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 02:14:45,163 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 758.0) internal successors, (6822), 9 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states 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 02:14:45,164 INFO L175 Difference]: Start difference. First operand has 110 places, 99 transitions, 802 flow. Second operand 8 states and 2381 transitions. [2023-08-04 02:14:45,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 219 transitions, 1885 flow [2023-08-04 02:14:46,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 219 transitions, 1825 flow, removed 19 selfloop flow, removed 6 redundant places. [2023-08-04 02:14:46,493 INFO L231 Difference]: Finished difference. Result has 111 places, 77 transitions, 512 flow [2023-08-04 02:14:46,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=512, PETRI_PLACES=111, PETRI_TRANSITIONS=77} [2023-08-04 02:14:46,493 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 57 predicate places. [2023-08-04 02:14:46,493 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 77 transitions, 512 flow [2023-08-04 02:14:46,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 283.0833333333333) internal successors, (3397), 12 states have internal predecessors, (3397), 0 states have call successors, (0), 0 states 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 02:14:46,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:14:46,494 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:14:46,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-04 02:14:46,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-04 02:14:46,694 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:14:46,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:14:46,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1680663496, now seen corresponding path program 2 times [2023-08-04 02:14:46,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:14:46,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956939338] [2023-08-04 02:14:46,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:14:46,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:14:46,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:14:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-08-04 02:14:47,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:14:47,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956939338] [2023-08-04 02:14:47,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956939338] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:14:47,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:14:47,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 02:14:47,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096923812] [2023-08-04 02:14:47,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:14:47,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-04 02:14:47,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:14:47,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-04 02:14:47,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:14:47,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 758 [2023-08-04 02:14:47,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 77 transitions, 512 flow. Second operand has 6 states, 6 states have (on average 286.3333333333333) internal successors, (1718), 6 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states 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 02:14:47,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:14:47,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 758 [2023-08-04 02:14:47,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:14:49,270 INFO L124 PetriNetUnfolderBase]: 6327/12169 cut-off events. [2023-08-04 02:14:49,271 INFO L125 PetriNetUnfolderBase]: For 58822/58822 co-relation queries the response was YES. [2023-08-04 02:14:49,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50188 conditions, 12169 events. 6327/12169 cut-off events. For 58822/58822 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 97371 event pairs, 684 based on Foata normal form. 2/12102 useless extension candidates. Maximal degree in co-relation 50157. Up to 6492 conditions per place. [2023-08-04 02:14:49,314 INFO L140 encePairwiseOnDemand]: 750/758 looper letters, 0 selfloop transitions, 0 changer transitions 135/135 dead transitions. [2023-08-04 02:14:49,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 135 transitions, 1050 flow [2023-08-04 02:14:49,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 02:14:49,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 02:14:49,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1791 transitions. [2023-08-04 02:14:49,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3937994722955145 [2023-08-04 02:14:49,316 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1791 transitions. [2023-08-04 02:14:49,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1791 transitions. [2023-08-04 02:14:49,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:14:49,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1791 transitions. [2023-08-04 02:14:49,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 298.5) internal successors, (1791), 6 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states 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 02:14:49,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 758.0) internal successors, (5306), 7 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states 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 02:14:49,321 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 758.0) internal successors, (5306), 7 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states 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 02:14:49,321 INFO L175 Difference]: Start difference. First operand has 111 places, 77 transitions, 512 flow. Second operand 6 states and 1791 transitions. [2023-08-04 02:14:49,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 135 transitions, 1050 flow [2023-08-04 02:14:49,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 135 transitions, 978 flow, removed 8 selfloop flow, removed 13 redundant places. [2023-08-04 02:14:49,577 INFO L231 Difference]: Finished difference. Result has 95 places, 0 transitions, 0 flow [2023-08-04 02:14:49,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=758, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=95, PETRI_TRANSITIONS=0} [2023-08-04 02:14:49,577 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 41 predicate places. [2023-08-04 02:14:49,577 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 0 transitions, 0 flow [2023-08-04 02:14:49,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 286.3333333333333) internal successors, (1718), 6 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states 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 02:14:49,578 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 02:14:49,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-04 02:14:49,578 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:14:49,578 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (2/2) [2023-08-04 02:14:49,578 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 02:14:49,578 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 02:14:49,582 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 02:14:49 BasicIcfg [2023-08-04 02:14:49,582 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 02:14:49,582 INFO L158 Benchmark]: Toolchain (without parser) took 125553.75ms. Allocated memory was 564.1MB in the beginning and 6.3GB in the end (delta: 5.8GB). Free memory was 512.3MB in the beginning and 4.8GB in the end (delta: -4.3GB). Peak memory consumption was 1.6GB. Max. memory is 16.0GB. [2023-08-04 02:14:49,582 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 360.7MB. Free memory is still 309.6MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 02:14:49,584 INFO L158 Benchmark]: CACSL2BoogieTranslator took 271.74ms. Allocated memory is still 564.1MB. Free memory was 512.0MB in the beginning and 500.5MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-04 02:14:49,584 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.34ms. Allocated memory is still 564.1MB. Free memory was 500.5MB in the beginning and 498.2MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 02:14:49,584 INFO L158 Benchmark]: Boogie Preprocessor took 24.83ms. Allocated memory is still 564.1MB. Free memory was 498.2MB in the beginning and 496.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 02:14:49,585 INFO L158 Benchmark]: RCFGBuilder took 469.94ms. Allocated memory is still 564.1MB. Free memory was 496.4MB in the beginning and 476.4MB in the end (delta: 20.1MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-04 02:14:49,585 INFO L158 Benchmark]: TraceAbstraction took 124746.25ms. Allocated memory was 564.1MB in the beginning and 6.3GB in the end (delta: 5.8GB). Free memory was 475.7MB in the beginning and 4.8GB in the end (delta: -4.3GB). Peak memory consumption was 1.5GB. Max. memory is 16.0GB. [2023-08-04 02:14:49,586 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 360.7MB. Free memory is still 309.6MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 271.74ms. Allocated memory is still 564.1MB. Free memory was 512.0MB in the beginning and 500.5MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 35.34ms. Allocated memory is still 564.1MB. Free memory was 500.5MB in the beginning and 498.2MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 24.83ms. Allocated memory is still 564.1MB. Free memory was 498.2MB in the beginning and 496.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 469.94ms. Allocated memory is still 564.1MB. Free memory was 496.4MB in the beginning and 476.4MB in the end (delta: 20.1MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 124746.25ms. Allocated memory was 564.1MB in the beginning and 6.3GB in the end (delta: 5.8GB). Free memory was 475.7MB in the beginning and 4.8GB in the end (delta: -4.3GB). Peak memory consumption was 1.5GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.8s, 222 PlacesBefore, 39 PlacesAfterwards, 243 TransitionsBefore, 41 TransitionsAfterwards, 22644 CoEnabledTransitionPairs, 7 FixpointIterations, 45 TrivialSequentialCompositions, 132 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 59 ConcurrentYvCompositions, 19 ChoiceCompositions, 255 TotalNumberOfCompositions, 24633 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 23705, independent: 23675, independent conditional: 0, independent unconditional: 23675, dependent: 30, dependent conditional: 0, dependent unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 13348, independent: 13330, independent conditional: 0, independent unconditional: 13330, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 23705, independent: 10345, independent conditional: 0, independent unconditional: 10345, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 13348, unknown conditional: 0, unknown unconditional: 13348] , Statistics on independence cache: Total cache size (in pairs): 48, Positive cache size: 45, Positive conditional cache size: 0, Positive unconditional cache size: 45, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 9.1s, 321 PlacesBefore, 54 PlacesAfterwards, 357 TransitionsBefore, 59 TransitionsAfterwards, 70380 CoEnabledTransitionPairs, 8 FixpointIterations, 45 TrivialSequentialCompositions, 215 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 110 ConcurrentYvCompositions, 31 ChoiceCompositions, 401 TotalNumberOfCompositions, 88938 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 84220, independent: 84145, independent conditional: 0, independent unconditional: 84145, dependent: 75, dependent conditional: 0, dependent unconditional: 75, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 42117, independent: 42083, independent conditional: 0, independent unconditional: 42083, dependent: 34, dependent conditional: 0, dependent unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 84220, independent: 42062, independent conditional: 0, independent unconditional: 42062, dependent: 41, dependent conditional: 0, dependent unconditional: 41, unknown: 42117, unknown conditional: 0, unknown unconditional: 42117] , Statistics on independence cache: Total cache size (in pairs): 166, Positive cache size: 163, Positive conditional cache size: 0, Positive unconditional cache size: 163, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7.9s, 321 PlacesBefore, 54 PlacesAfterwards, 357 TransitionsBefore, 59 TransitionsAfterwards, 70380 CoEnabledTransitionPairs, 8 FixpointIterations, 45 TrivialSequentialCompositions, 219 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 106 ConcurrentYvCompositions, 31 ChoiceCompositions, 401 TotalNumberOfCompositions, 89641 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 85649, independent: 85577, independent conditional: 0, independent unconditional: 85577, dependent: 72, dependent conditional: 0, dependent unconditional: 72, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 42303, independent: 42268, independent conditional: 0, independent unconditional: 42268, dependent: 35, dependent conditional: 0, dependent unconditional: 35, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 85649, independent: 43309, independent conditional: 0, independent unconditional: 43309, dependent: 37, dependent conditional: 0, dependent unconditional: 37, unknown: 42303, unknown conditional: 0, unknown unconditional: 42303] , Statistics on independence cache: Total cache size (in pairs): 153, Positive cache size: 147, Positive conditional cache size: 0, Positive unconditional cache size: 147, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 80]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 7 procedures, 309 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 6.3s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.1s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=124occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 10 procedures, 402 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 19.3s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 6.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 10.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 267 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 210 mSDsluCounter, 15 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 24 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 502 IncrementalHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 24 mSolverCounterUnsat, 15 mSDtfsCounter, 502 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 161 GetRequests, 137 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=208occurred in iteration=0, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 235 NumberOfCodeBlocks, 235 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 262 ConstructedInterpolants, 0 QuantifiedInterpolants, 434 SizeOfPredicates, 0 NumberOfNonLiveVariables, 728 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 14 InterpolantComputations, 5 PerfectInterpolantSequences, 157/178 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 10 procedures, 402 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 98.9s, OverallIterations: 18, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 64.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 8.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4323 SdHoareTripleChecker+Valid, 6.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3834 mSDsluCounter, 1127 SdHoareTripleChecker+Invalid, 5.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 969 mSDsCounter, 311 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9174 IncrementalHoareTripleChecker+Invalid, 9485 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 311 mSolverCounterUnsat, 158 mSDtfsCounter, 9174 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1336 GetRequests, 1191 SyntacticMatches, 28 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=802occurred in iteration=16, InterpolantAutomatonStates: 90, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 19.9s InterpolantComputationTime, 1408 NumberOfCodeBlocks, 1408 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 1935 ConstructedInterpolants, 0 QuantifiedInterpolants, 27696 SizeOfPredicates, 265 NumberOfNonLiveVariables, 3046 ConjunctsInSsa, 70 ConjunctsInUnsatCore, 45 InterpolantComputations, 7 PerfectInterpolantSequences, 790/882 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-04 02:14:49,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...