/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_unroll-cond-3.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 03:36:26,772 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 03:36:26,852 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 03:36:26,856 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 03:36:26,856 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 03:36:26,857 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 03:36:26,857 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 03:36:26,879 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 03:36:26,880 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 03:36:26,880 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 03:36:26,881 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 03:36:26,881 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 03:36:26,882 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 03:36:26,897 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 03:36:26,897 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 03:36:26,897 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 03:36:26,897 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 03:36:26,897 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 03:36:26,898 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 03:36:26,898 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 03:36:26,898 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 03:36:26,898 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 03:36:26,898 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 03:36:26,898 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 03:36:26,899 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 03:36:26,899 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 03:36:26,899 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 03:36:26,899 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 03:36:26,899 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 03:36:26,900 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 03:36:26,900 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:36:26,900 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 03:36:26,900 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 03:36:26,901 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 03:36:26,901 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 03:36:26,901 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 03:36:26,901 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 03:36:26,901 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 03:36:26,901 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 03:36:26,901 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 03:36:26,901 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 03:36:26,901 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 03:36:27,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 03:36:27,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 03:36:27,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 03:36:27,127 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 03:36:27,128 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 03:36:27,129 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_unroll-cond-3.wvr_bound2.c [2023-08-04 03:36:28,121 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 03:36:28,276 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 03:36:28,277 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_unroll-cond-3.wvr_bound2.c [2023-08-04 03:36:28,282 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbe754030/fdfa72b613f44e94a02f332f2c038ae4/FLAGddf1698e8 [2023-08-04 03:36:28,292 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbe754030/fdfa72b613f44e94a02f332f2c038ae4 [2023-08-04 03:36:28,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 03:36:28,294 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 03:36:28,295 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 03:36:28,295 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 03:36:28,300 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 03:36:28,300 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:36:28" (1/1) ... [2023-08-04 03:36:28,301 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@160b5f67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:36:28, skipping insertion in model container [2023-08-04 03:36:28,301 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:36:28" (1/1) ... [2023-08-04 03:36:28,326 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 03:36:28,514 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_unroll-cond-3.wvr_bound2.c[2803,2816] [2023-08-04 03:36:28,517 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:36:28,529 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 03:36:28,555 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_unroll-cond-3.wvr_bound2.c[2803,2816] [2023-08-04 03:36:28,557 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:36:28,582 INFO L206 MainTranslator]: Completed translation [2023-08-04 03:36:28,582 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:36:28 WrapperNode [2023-08-04 03:36:28,583 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 03:36:28,583 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 03:36:28,584 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 03:36:28,584 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 03:36:28,588 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:36:28" (1/1) ... [2023-08-04 03:36:28,600 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:36:28" (1/1) ... [2023-08-04 03:36:28,622 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 197 [2023-08-04 03:36:28,623 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 03:36:28,623 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 03:36:28,623 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 03:36:28,623 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 03:36:28,634 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:36:28" (1/1) ... [2023-08-04 03:36:28,634 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:36:28" (1/1) ... [2023-08-04 03:36:28,639 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:36:28" (1/1) ... [2023-08-04 03:36:28,639 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:36:28" (1/1) ... [2023-08-04 03:36:28,646 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:36:28" (1/1) ... [2023-08-04 03:36:28,654 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:36:28" (1/1) ... [2023-08-04 03:36:28,655 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:36:28" (1/1) ... [2023-08-04 03:36:28,656 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:36:28" (1/1) ... [2023-08-04 03:36:28,657 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 03:36:28,658 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 03:36:28,658 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 03:36:28,658 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 03:36:28,659 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:36:28" (1/1) ... [2023-08-04 03:36:28,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:36:28,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:36:28,688 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 03:36:28,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 03:36:28,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 03:36:28,716 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 03:36:28,717 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 03:36:28,717 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 03:36:28,717 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 03:36:28,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 03:36:28,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 03:36:28,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 03:36:28,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 03:36:28,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 03:36:28,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 03:36:28,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 03:36:28,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 03:36:28,720 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 03:36:28,789 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 03:36:28,791 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 03:36:29,042 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 03:36:29,050 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 03:36:29,050 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-04 03:36:29,052 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:36:29 BoogieIcfgContainer [2023-08-04 03:36:29,052 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 03:36:29,054 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 03:36:29,054 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 03:36:29,056 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 03:36:29,056 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 03:36:28" (1/3) ... [2023-08-04 03:36:29,057 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cd572a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:36:29, skipping insertion in model container [2023-08-04 03:36:29,057 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:36:28" (2/3) ... [2023-08-04 03:36:29,057 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cd572a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:36:29, skipping insertion in model container [2023-08-04 03:36:29,057 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:36:29" (3/3) ... [2023-08-04 03:36:29,058 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_unroll-cond-3.wvr_bound2.c [2023-08-04 03:36:29,063 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 03:36:29,069 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 03:36:29,069 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 03:36:29,069 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 03:36:29,173 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 03:36:29,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 224 transitions, 470 flow [2023-08-04 03:36:29,326 INFO L124 PetriNetUnfolderBase]: 52/429 cut-off events. [2023-08-04 03:36:29,326 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 03:36:29,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449 conditions, 429 events. 52/429 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1748 event pairs, 0 based on Foata normal form. 0/367 useless extension candidates. Maximal degree in co-relation 225. Up to 8 conditions per place. [2023-08-04 03:36:29,335 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 224 transitions, 470 flow [2023-08-04 03:36:29,346 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 224 transitions, 470 flow [2023-08-04 03:36:29,349 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:36:29,371 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 224 transitions, 470 flow [2023-08-04 03:36:29,373 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 224 transitions, 470 flow [2023-08-04 03:36:29,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 224 transitions, 470 flow [2023-08-04 03:36:29,431 INFO L124 PetriNetUnfolderBase]: 52/429 cut-off events. [2023-08-04 03:36:29,431 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 03:36:29,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449 conditions, 429 events. 52/429 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1748 event pairs, 0 based on Foata normal form. 0/367 useless extension candidates. Maximal degree in co-relation 225. Up to 8 conditions per place. [2023-08-04 03:36:29,442 INFO L119 LiptonReduction]: Number of co-enabled transitions 12406 [2023-08-04 03:36:33,456 INFO L134 LiptonReduction]: Checked pairs total: 16182 [2023-08-04 03:36:33,457 INFO L136 LiptonReduction]: Total number of compositions: 233 [2023-08-04 03:36:33,467 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:36:33,472 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;@647f2680, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:36:33,472 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 03:36:33,476 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:36:33,476 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2023-08-04 03:36:33,476 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:36:33,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:36:33,476 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 03:36:33,477 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:36:33,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:36:33,480 INFO L85 PathProgramCache]: Analyzing trace with hash -494424685, now seen corresponding path program 1 times [2023-08-04 03:36:33,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:36:33,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488382198] [2023-08-04 03:36:33,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:36:33,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:36:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:36:33,776 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 03:36:33,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:36:33,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488382198] [2023-08-04 03:36:33,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488382198] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:36:33,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:36:33,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:36:33,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157886592] [2023-08-04 03:36:33,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:36:33,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:36:33,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:36:33,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:36:33,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:36:33,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 457 [2023-08-04 03:36:33,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 44 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:36:33,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:36:33,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 457 [2023-08-04 03:36:33,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:36:34,030 INFO L124 PetriNetUnfolderBase]: 1095/1666 cut-off events. [2023-08-04 03:36:34,031 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-08-04 03:36:34,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3348 conditions, 1666 events. 1095/1666 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7846 event pairs, 659 based on Foata normal form. 0/1078 useless extension candidates. Maximal degree in co-relation 2704. Up to 1613 conditions per place. [2023-08-04 03:36:34,036 INFO L140 encePairwiseOnDemand]: 452/457 looper letters, 24 selfloop transitions, 2 changer transitions 13/43 dead transitions. [2023-08-04 03:36:34,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 43 transitions, 182 flow [2023-08-04 03:36:34,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:36:34,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:36:34,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 628 transitions. [2023-08-04 03:36:34,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45805981035740334 [2023-08-04 03:36:34,053 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 628 transitions. [2023-08-04 03:36:34,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 628 transitions. [2023-08-04 03:36:34,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:36:34,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 628 transitions. [2023-08-04 03:36:34,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:36:34,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:36:34,069 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 457.0) internal successors, (1828), 4 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:36:34,070 INFO L175 Difference]: Start difference. First operand has 39 places, 44 transitions, 110 flow. Second operand 3 states and 628 transitions. [2023-08-04 03:36:34,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 43 transitions, 182 flow [2023-08-04 03:36:34,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 43 transitions, 182 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:36:34,077 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 80 flow [2023-08-04 03:36:34,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=457, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2023-08-04 03:36:34,081 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2023-08-04 03:36:34,081 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 80 flow [2023-08-04 03:36:34,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:36:34,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:36:34,082 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 03:36:34,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 03:36:34,082 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:36:34,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:36:34,084 INFO L85 PathProgramCache]: Analyzing trace with hash -952685283, now seen corresponding path program 1 times [2023-08-04 03:36:34,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:36:34,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818042595] [2023-08-04 03:36:34,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:36:34,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:36:34,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:36:34,120 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 03:36:34,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:36:34,150 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 03:36:34,150 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 03:36:34,151 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 03:36:34,152 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 03:36:34,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 03:36:34,153 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 03:36:34,154 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 03:36:34,155 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 03:36:34,155 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 03:36:34,197 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 03:36:34,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 291 places, 324 transitions, 696 flow [2023-08-04 03:36:34,381 INFO L124 PetriNetUnfolderBase]: 182/1273 cut-off events. [2023-08-04 03:36:34,381 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:36:34,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1370 conditions, 1273 events. 182/1273 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 7932 event pairs, 1 based on Foata normal form. 0/1088 useless extension candidates. Maximal degree in co-relation 776. Up to 32 conditions per place. [2023-08-04 03:36:34,388 INFO L82 GeneralOperation]: Start removeDead. Operand has 291 places, 324 transitions, 696 flow [2023-08-04 03:36:34,394 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 291 places, 324 transitions, 696 flow [2023-08-04 03:36:34,394 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:36:34,394 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 291 places, 324 transitions, 696 flow [2023-08-04 03:36:34,396 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 291 places, 324 transitions, 696 flow [2023-08-04 03:36:34,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 291 places, 324 transitions, 696 flow [2023-08-04 03:36:34,526 INFO L124 PetriNetUnfolderBase]: 182/1273 cut-off events. [2023-08-04 03:36:34,527 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:36:34,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1370 conditions, 1273 events. 182/1273 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 7932 event pairs, 1 based on Foata normal form. 0/1088 useless extension candidates. Maximal degree in co-relation 776. Up to 32 conditions per place. [2023-08-04 03:36:34,608 INFO L119 LiptonReduction]: Number of co-enabled transitions 44252 [2023-08-04 03:36:39,274 INFO L134 LiptonReduction]: Checked pairs total: 77119 [2023-08-04 03:36:39,275 INFO L136 LiptonReduction]: Total number of compositions: 317 [2023-08-04 03:36:39,277 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:36:39,277 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;@647f2680, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:36:39,277 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 03:36:39,283 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:36:39,284 INFO L124 PetriNetUnfolderBase]: 15/113 cut-off events. [2023-08-04 03:36:39,284 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 03:36:39,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:36:39,284 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 03:36:39,284 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:36:39,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:36:39,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1271405941, now seen corresponding path program 1 times [2023-08-04 03:36:39,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:36:39,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90420916] [2023-08-04 03:36:39,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:36:39,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:36:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:36:39,375 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 03:36:39,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:36:39,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90420916] [2023-08-04 03:36:39,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90420916] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:36:39,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:36:39,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:36:39,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064328569] [2023-08-04 03:36:39,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:36:39,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:36:39,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:36:39,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:36:39,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:36:39,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 641 [2023-08-04 03:36:39,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 91 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 284.0) internal successors, (852), 3 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:36:39,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:36:39,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 641 [2023-08-04 03:36:39,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:37:10,998 INFO L124 PetriNetUnfolderBase]: 478887/592737 cut-off events. [2023-08-04 03:37:10,998 INFO L125 PetriNetUnfolderBase]: For 32513/32513 co-relation queries the response was YES. [2023-08-04 03:37:11,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1191611 conditions, 592737 events. 478887/592737 cut-off events. For 32513/32513 co-relation queries the response was YES. Maximal size of possible extension queue 15507. Compared 3577934 event pairs, 321030 based on Foata normal form. 39500/406467 useless extension candidates. Maximal degree in co-relation 380007. Up to 585509 conditions per place. [2023-08-04 03:37:12,694 INFO L140 encePairwiseOnDemand]: 631/641 looper letters, 57 selfloop transitions, 2 changer transitions 17/85 dead transitions. [2023-08-04 03:37:12,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 85 transitions, 366 flow [2023-08-04 03:37:12,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:37:12,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:37:12,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 928 transitions. [2023-08-04 03:37:12,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4825793031721269 [2023-08-04 03:37:12,697 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 928 transitions. [2023-08-04 03:37:12,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 928 transitions. [2023-08-04 03:37:12,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:37:12,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 928 transitions. [2023-08-04 03:37:12,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 309.3333333333333) internal successors, (928), 3 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:37:12,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 641.0) internal successors, (2564), 4 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:37:12,702 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 641.0) internal successors, (2564), 4 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:37:12,702 INFO L175 Difference]: Start difference. First operand has 77 places, 91 transitions, 230 flow. Second operand 3 states and 928 transitions. [2023-08-04 03:37:12,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 85 transitions, 366 flow [2023-08-04 03:37:12,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 85 transitions, 366 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:37:12,708 INFO L231 Difference]: Finished difference. Result has 79 places, 68 transitions, 170 flow [2023-08-04 03:37:12,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=641, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=79, PETRI_TRANSITIONS=68} [2023-08-04 03:37:12,709 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 2 predicate places. [2023-08-04 03:37:12,709 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 68 transitions, 170 flow [2023-08-04 03:37:12,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 284.0) internal successors, (852), 3 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:37:12,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:37:12,710 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 03:37:12,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 03:37:12,710 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:37:12,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:37:12,710 INFO L85 PathProgramCache]: Analyzing trace with hash -266488457, now seen corresponding path program 1 times [2023-08-04 03:37:12,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:37:12,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125740834] [2023-08-04 03:37:12,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:37:12,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:37:12,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:37:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:37:12,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:37:12,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125740834] [2023-08-04 03:37:12,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125740834] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:37:12,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822191404] [2023-08-04 03:37:12,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:37:12,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:37:12,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:37:12,794 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:37:12,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 03:37:12,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:37:12,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:37:12,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:37:12,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:37:12,907 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:37:12,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822191404] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:37:12,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:37:12,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:37:12,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840483351] [2023-08-04 03:37:12,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:37:12,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:37:12,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:37:12,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:37:12,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:37:12,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 641 [2023-08-04 03:37:12,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 68 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:37:12,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:37:12,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 641 [2023-08-04 03:37:12,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:37:21,483 INFO L124 PetriNetUnfolderBase]: 138867/171326 cut-off events. [2023-08-04 03:37:21,483 INFO L125 PetriNetUnfolderBase]: For 1874/1874 co-relation queries the response was YES. [2023-08-04 03:37:21,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344107 conditions, 171326 events. 138867/171326 cut-off events. For 1874/1874 co-relation queries the response was YES. Maximal size of possible extension queue 4726. Compared 927783 event pairs, 52021 based on Foata normal form. 0/113363 useless extension candidates. Maximal degree in co-relation 344092. Up to 170444 conditions per place. [2023-08-04 03:37:22,244 INFO L140 encePairwiseOnDemand]: 637/641 looper letters, 70 selfloop transitions, 5 changer transitions 0/83 dead transitions. [2023-08-04 03:37:22,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 83 transitions, 346 flow [2023-08-04 03:37:22,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:37:22,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:37:22,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1480 transitions. [2023-08-04 03:37:22,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46177847113884557 [2023-08-04 03:37:22,247 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1480 transitions. [2023-08-04 03:37:22,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1480 transitions. [2023-08-04 03:37:22,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:37:22,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1480 transitions. [2023-08-04 03:37:22,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:37:22,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 641.0) internal successors, (3846), 6 states have internal predecessors, (3846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:37:22,255 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 641.0) internal successors, (3846), 6 states have internal predecessors, (3846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:37:22,255 INFO L175 Difference]: Start difference. First operand has 79 places, 68 transitions, 170 flow. Second operand 5 states and 1480 transitions. [2023-08-04 03:37:22,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 83 transitions, 346 flow [2023-08-04 03:37:22,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 83 transitions, 339 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 03:37:22,259 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 180 flow [2023-08-04 03:37:22,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=641, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=180, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2023-08-04 03:37:22,260 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -5 predicate places. [2023-08-04 03:37:22,260 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 180 flow [2023-08-04 03:37:22,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:37:22,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:37:22,261 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:37:22,265 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 03:37:22,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:37:22,465 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:37:22,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:37:22,466 INFO L85 PathProgramCache]: Analyzing trace with hash -2123229290, now seen corresponding path program 1 times [2023-08-04 03:37:22,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:37:22,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871671873] [2023-08-04 03:37:22,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:37:22,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:37:22,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:37:22,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 03:37:22,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:37:22,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871671873] [2023-08-04 03:37:22,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871671873] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:37:22,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:37:22,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:37:22,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847828172] [2023-08-04 03:37:22,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:37:22,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:37:22,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:37:22,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:37:22,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:37:22,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 641 [2023-08-04 03:37:22,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 284.6666666666667) internal successors, (854), 3 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:37:22,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:37:22,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 641 [2023-08-04 03:37:22,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:37:30,856 INFO L124 PetriNetUnfolderBase]: 136411/167903 cut-off events. [2023-08-04 03:37:30,856 INFO L125 PetriNetUnfolderBase]: For 1657/1657 co-relation queries the response was YES. [2023-08-04 03:37:31,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336959 conditions, 167903 events. 136411/167903 cut-off events. For 1657/1657 co-relation queries the response was YES. Maximal size of possible extension queue 4759. Compared 900451 event pairs, 72815 based on Foata normal form. 1/110930 useless extension candidates. Maximal degree in co-relation 336939. Up to 167010 conditions per place. [2023-08-04 03:37:31,575 INFO L140 encePairwiseOnDemand]: 638/641 looper letters, 64 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-04 03:37:31,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 74 transitions, 319 flow [2023-08-04 03:37:31,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:37:31,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:37:31,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 911 transitions. [2023-08-04 03:37:31,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4737389495579823 [2023-08-04 03:37:31,578 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 911 transitions. [2023-08-04 03:37:31,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 911 transitions. [2023-08-04 03:37:31,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:37:31,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 911 transitions. [2023-08-04 03:37:31,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 303.6666666666667) internal successors, (911), 3 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:37:31,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 641.0) internal successors, (2564), 4 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:37:31,583 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 641.0) internal successors, (2564), 4 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:37:31,583 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 180 flow. Second operand 3 states and 911 transitions. [2023-08-04 03:37:31,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 74 transitions, 319 flow [2023-08-04 03:37:31,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 74 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:37:31,586 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 178 flow [2023-08-04 03:37:31,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=641, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2023-08-04 03:37:31,587 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -4 predicate places. [2023-08-04 03:37:31,588 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 178 flow [2023-08-04 03:37:31,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 284.6666666666667) internal successors, (854), 3 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:37:31,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:37:31,588 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:37:31,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 03:37:31,588 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:37:31,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:37:31,589 INFO L85 PathProgramCache]: Analyzing trace with hash -123455103, now seen corresponding path program 1 times [2023-08-04 03:37:31,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:37:31,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073156688] [2023-08-04 03:37:31,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:37:31,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:37:31,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:37:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 03:37:31,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:37:31,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073156688] [2023-08-04 03:37:31,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073156688] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:37:31,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748539673] [2023-08-04 03:37:31,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:37:31,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:37:31,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:37:31,641 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:37:31,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 03:37:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:37:31,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:37:31,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:37:31,720 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 03:37:31,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:37:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 03:37:31,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748539673] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:37:31,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:37:31,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:37:31,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426313349] [2023-08-04 03:37:31,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:37:31,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:37:31,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:37:31,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:37:31,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:37:31,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 641 [2023-08-04 03:37:31,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 178 flow. Second operand has 5 states, 5 states have (on average 284.0) internal successors, (1420), 5 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:37:31,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:37:31,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 641 [2023-08-04 03:37:31,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:37:39,022 INFO L124 PetriNetUnfolderBase]: 119627/145880 cut-off events. [2023-08-04 03:37:39,023 INFO L125 PetriNetUnfolderBase]: For 1389/1389 co-relation queries the response was YES. [2023-08-04 03:37:39,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292736 conditions, 145880 events. 119627/145880 cut-off events. For 1389/1389 co-relation queries the response was YES. Maximal size of possible extension queue 4252. Compared 748060 event pairs, 42677 based on Foata normal form. 5/95013 useless extension candidates. Maximal degree in co-relation 292715. Up to 145060 conditions per place. [2023-08-04 03:37:39,652 INFO L140 encePairwiseOnDemand]: 638/641 looper letters, 70 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2023-08-04 03:37:39,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 81 transitions, 347 flow [2023-08-04 03:37:39,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:37:39,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:37:39,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1197 transitions. [2023-08-04 03:37:39,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4668486739469579 [2023-08-04 03:37:39,655 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1197 transitions. [2023-08-04 03:37:39,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1197 transitions. [2023-08-04 03:37:39,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:37:39,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1197 transitions. [2023-08-04 03:37:39,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 299.25) internal successors, (1197), 4 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:37:39,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 641.0) internal successors, (3205), 5 states have internal predecessors, (3205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:37:39,662 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 641.0) internal successors, (3205), 5 states have internal predecessors, (3205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:37:39,662 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 178 flow. Second operand 4 states and 1197 transitions. [2023-08-04 03:37:39,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 81 transitions, 347 flow [2023-08-04 03:37:39,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 81 transitions, 343 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:37:39,664 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 175 flow [2023-08-04 03:37:39,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=641, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=175, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2023-08-04 03:37:39,664 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -3 predicate places. [2023-08-04 03:37:39,664 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 175 flow [2023-08-04 03:37:39,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 284.0) internal successors, (1420), 5 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:37:39,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:37:39,665 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:37:39,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 03:37:39,869 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,SelfDestructingSolverStorable5 [2023-08-04 03:37:39,869 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:37:39,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:37:39,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1185625995, now seen corresponding path program 1 times [2023-08-04 03:37:39,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:37:39,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398422577] [2023-08-04 03:37:39,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:37:39,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:37:39,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:37:39,916 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 03:37:39,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:37:39,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398422577] [2023-08-04 03:37:39,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398422577] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:37:39,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737457374] [2023-08-04 03:37:39,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:37:39,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:37:39,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:37:39,918 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:37:39,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 03:37:39,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:37:39,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:37:39,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:37:39,998 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 03:37:39,998 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:37:40,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737457374] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:37:40,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:37:40,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:37:40,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314286819] [2023-08-04 03:37:40,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:37:40,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:37:40,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:37:40,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:37:40,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:37:40,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 641 [2023-08-04 03:37:40,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 175 flow. Second operand has 5 states, 5 states have (on average 284.0) internal successors, (1420), 5 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:37:40,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:37:40,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 641 [2023-08-04 03:37:40,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:37:44,604 INFO L124 PetriNetUnfolderBase]: 76997/95130 cut-off events. [2023-08-04 03:37:44,605 INFO L125 PetriNetUnfolderBase]: For 664/664 co-relation queries the response was YES. [2023-08-04 03:37:44,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190852 conditions, 95130 events. 76997/95130 cut-off events. For 664/664 co-relation queries the response was YES. Maximal size of possible extension queue 2974. Compared 483045 event pairs, 509 based on Foata normal form. 8100/69542 useless extension candidates. Maximal degree in co-relation 190831. Up to 48985 conditions per place. [2023-08-04 03:37:44,760 INFO L140 encePairwiseOnDemand]: 638/641 looper letters, 0 selfloop transitions, 0 changer transitions 150/150 dead transitions. [2023-08-04 03:37:44,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 150 transitions, 623 flow [2023-08-04 03:37:44,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:37:44,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:37:44,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1547 transitions. [2023-08-04 03:37:44,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4826833073322933 [2023-08-04 03:37:44,763 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1547 transitions. [2023-08-04 03:37:44,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1547 transitions. [2023-08-04 03:37:44,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:37:44,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1547 transitions. [2023-08-04 03:37:44,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 309.4) internal successors, (1547), 5 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:37:44,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 641.0) internal successors, (3846), 6 states have internal predecessors, (3846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:37:44,769 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 641.0) internal successors, (3846), 6 states have internal predecessors, (3846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:37:44,769 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 175 flow. Second operand 5 states and 1547 transitions. [2023-08-04 03:37:44,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 150 transitions, 623 flow [2023-08-04 03:37:44,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 150 transitions, 616 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:37:44,799 INFO L231 Difference]: Finished difference. Result has 73 places, 0 transitions, 0 flow [2023-08-04 03:37:44,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=641, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=73, PETRI_TRANSITIONS=0} [2023-08-04 03:37:44,800 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -4 predicate places. [2023-08-04 03:37:44,800 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 0 transitions, 0 flow [2023-08-04 03:37:44,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 284.0) internal successors, (1420), 5 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:37:44,801 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 03:37:44,801 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 03:37:44,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 03:37:45,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:37:45,003 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 03:37:45,003 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 03:37:45,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 291 places, 324 transitions, 696 flow [2023-08-04 03:37:45,116 INFO L124 PetriNetUnfolderBase]: 182/1273 cut-off events. [2023-08-04 03:37:45,116 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:37:45,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1370 conditions, 1273 events. 182/1273 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 7932 event pairs, 1 based on Foata normal form. 0/1088 useless extension candidates. Maximal degree in co-relation 776. Up to 32 conditions per place. [2023-08-04 03:37:45,126 INFO L82 GeneralOperation]: Start removeDead. Operand has 291 places, 324 transitions, 696 flow [2023-08-04 03:37:45,132 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 291 places, 324 transitions, 696 flow [2023-08-04 03:37:45,132 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:37:45,132 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 291 places, 324 transitions, 696 flow [2023-08-04 03:37:45,132 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 291 places, 324 transitions, 696 flow [2023-08-04 03:37:45,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 291 places, 324 transitions, 696 flow [2023-08-04 03:37:45,262 INFO L124 PetriNetUnfolderBase]: 182/1273 cut-off events. [2023-08-04 03:37:45,263 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:37:45,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1370 conditions, 1273 events. 182/1273 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 7932 event pairs, 1 based on Foata normal form. 0/1088 useless extension candidates. Maximal degree in co-relation 776. Up to 32 conditions per place. [2023-08-04 03:37:45,316 INFO L119 LiptonReduction]: Number of co-enabled transitions 44252 [2023-08-04 03:37:49,709 INFO L134 LiptonReduction]: Checked pairs total: 79382 [2023-08-04 03:37:49,709 INFO L136 LiptonReduction]: Total number of compositions: 322 [2023-08-04 03:37:49,711 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:37:49,711 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;@647f2680, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:37:49,711 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:37:49,713 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:37:49,713 INFO L124 PetriNetUnfolderBase]: 1/15 cut-off events. [2023-08-04 03:37:49,713 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:37:49,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:37:49,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 03:37:49,713 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:37:49,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:37:49,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1609031195, now seen corresponding path program 1 times [2023-08-04 03:37:49,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:37:49,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019590901] [2023-08-04 03:37:49,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:37:49,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:37:49,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:37:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:37:49,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:37:49,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019590901] [2023-08-04 03:37:49,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019590901] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:37:49,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:37:49,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:37:49,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815182823] [2023-08-04 03:37:49,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:37:49,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:37:49,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:37:49,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:37:49,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:37:49,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 646 [2023-08-04 03:37:49,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 95 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 284.0) internal successors, (852), 3 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:37:49,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:37:49,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 646 [2023-08-04 03:37:49,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:38:33,322 INFO L124 PetriNetUnfolderBase]: 702758/859102 cut-off events. [2023-08-04 03:38:33,322 INFO L125 PetriNetUnfolderBase]: For 41645/41645 co-relation queries the response was YES. [2023-08-04 03:38:34,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1730361 conditions, 859102 events. 702758/859102 cut-off events. For 41645/41645 co-relation queries the response was YES. Maximal size of possible extension queue 21879. Compared 5088593 event pairs, 382862 based on Foata normal form. 81466/585760 useless extension candidates. Maximal degree in co-relation 509608. Up to 853646 conditions per place. [2023-08-04 03:38:36,837 INFO L140 encePairwiseOnDemand]: 634/646 looper letters, 81 selfloop transitions, 2 changer transitions 2/93 dead transitions. [2023-08-04 03:38:36,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 93 transitions, 400 flow [2023-08-04 03:38:36,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:38:36,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:38:36,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 940 transitions. [2023-08-04 03:38:36,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4850361197110423 [2023-08-04 03:38:36,840 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 940 transitions. [2023-08-04 03:38:36,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 940 transitions. [2023-08-04 03:38:36,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:38:36,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 940 transitions. [2023-08-04 03:38:36,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 03:38:36,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 646.0) internal successors, (2584), 4 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:38:36,844 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 646.0) internal successors, (2584), 4 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:38:36,844 INFO L175 Difference]: Start difference. First operand has 79 places, 95 transitions, 238 flow. Second operand 3 states and 940 transitions. [2023-08-04 03:38:36,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 93 transitions, 400 flow [2023-08-04 03:38:36,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 93 transitions, 400 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:38:36,860 INFO L231 Difference]: Finished difference. Result has 81 places, 85 transitions, 220 flow [2023-08-04 03:38:36,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=646, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=81, PETRI_TRANSITIONS=85} [2023-08-04 03:38:36,861 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 2 predicate places. [2023-08-04 03:38:36,861 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 85 transitions, 220 flow [2023-08-04 03:38:36,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 284.0) internal successors, (852), 3 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:38:36,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:38:36,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:38:36,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 03:38:36,862 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:38:36,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:38:36,862 INFO L85 PathProgramCache]: Analyzing trace with hash 2092759065, now seen corresponding path program 1 times [2023-08-04 03:38:36,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:38:36,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595140124] [2023-08-04 03:38:36,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:38:36,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:38:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:38:36,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:38:36,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:38:36,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595140124] [2023-08-04 03:38:36,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595140124] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:38:36,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420458164] [2023-08-04 03:38:36,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:38:36,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:38:36,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:38:36,888 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:38:36,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 03:38:36,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:38:36,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:38:36,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:38:36,955 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 03:38:36,955 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:38:36,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420458164] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:38:36,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:38:36,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:38:36,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510603738] [2023-08-04 03:38:36,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:38:36,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:38:36,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:38:36,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:38:36,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:38:36,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 646 [2023-08-04 03:38:36,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 85 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 285.0) internal successors, (855), 3 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:38:36,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:38:36,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 646 [2023-08-04 03:38:36,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:39:23,563 INFO L124 PetriNetUnfolderBase]: 699997/859873 cut-off events. [2023-08-04 03:39:23,563 INFO L125 PetriNetUnfolderBase]: For 37482/37482 co-relation queries the response was YES. [2023-08-04 03:39:24,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1727323 conditions, 859873 events. 699997/859873 cut-off events. For 37482/37482 co-relation queries the response was YES. Maximal size of possible extension queue 22209. Compared 5219616 event pairs, 341740 based on Foata normal form. 0/506062 useless extension candidates. Maximal degree in co-relation 814449. Up to 847625 conditions per place. [2023-08-04 03:39:27,280 INFO L140 encePairwiseOnDemand]: 643/646 looper letters, 106 selfloop transitions, 2 changer transitions 0/116 dead transitions. [2023-08-04 03:39:27,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 116 transitions, 498 flow [2023-08-04 03:39:27,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:39:27,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:39:27,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 954 transitions. [2023-08-04 03:39:27,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49226006191950467 [2023-08-04 03:39:27,283 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 954 transitions. [2023-08-04 03:39:27,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 954 transitions. [2023-08-04 03:39:27,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:39:27,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 954 transitions. [2023-08-04 03:39:27,284 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 03:39:27,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 646.0) internal successors, (2584), 4 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:39:27,286 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 646.0) internal successors, (2584), 4 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:39:27,287 INFO L175 Difference]: Start difference. First operand has 81 places, 85 transitions, 220 flow. Second operand 3 states and 954 transitions. [2023-08-04 03:39:27,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 116 transitions, 498 flow [2023-08-04 03:39:27,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 116 transitions, 490 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 03:39:27,362 INFO L231 Difference]: Finished difference. Result has 79 places, 86 transitions, 224 flow [2023-08-04 03:39:27,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=646, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=79, PETRI_TRANSITIONS=86} [2023-08-04 03:39:27,362 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 0 predicate places. [2023-08-04 03:39:27,362 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 86 transitions, 224 flow [2023-08-04 03:39:27,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 285.0) internal successors, (855), 3 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:39:27,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:39:27,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:39:27,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 03:39:27,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:39:27,568 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:39:27,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:39:27,569 INFO L85 PathProgramCache]: Analyzing trace with hash 840716983, now seen corresponding path program 1 times [2023-08-04 03:39:27,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:39:27,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422719605] [2023-08-04 03:39:27,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:39:27,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:39:27,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:39:27,591 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 03:39:27,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:39:27,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422719605] [2023-08-04 03:39:27,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422719605] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:39:27,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929462953] [2023-08-04 03:39:27,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:39:27,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:39:27,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:39:27,593 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:39:27,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 03:39:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:39:27,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:39:27,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:39:27,680 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 03:39:27,680 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:39:27,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929462953] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:39:27,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:39:27,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:39:27,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797135742] [2023-08-04 03:39:27,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:39:27,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:39:27,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:39:27,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:39:27,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:39:27,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 646 [2023-08-04 03:39:27,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 86 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 286.0) internal successors, (858), 3 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:39:27,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:39:27,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 646 [2023-08-04 03:39:27,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:39:59,507 INFO L124 PetriNetUnfolderBase]: 505235/628801 cut-off events. [2023-08-04 03:39:59,508 INFO L125 PetriNetUnfolderBase]: For 38133/38133 co-relation queries the response was YES. [2023-08-04 03:40:00,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1291105 conditions, 628801 events. 505235/628801 cut-off events. For 38133/38133 co-relation queries the response was YES. Maximal size of possible extension queue 15210. Compared 3933541 event pairs, 222512 based on Foata normal form. 0/396155 useless extension candidates. Maximal degree in co-relation 376783. Up to 410781 conditions per place. [2023-08-04 03:40:02,563 INFO L140 encePairwiseOnDemand]: 643/646 looper letters, 131 selfloop transitions, 2 changer transitions 0/141 dead transitions. [2023-08-04 03:40:02,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 141 transitions, 610 flow [2023-08-04 03:40:02,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:40:02,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:40:02,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 978 transitions. [2023-08-04 03:40:02,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046439628482973 [2023-08-04 03:40:02,580 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 978 transitions. [2023-08-04 03:40:02,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 978 transitions. [2023-08-04 03:40:02,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:40:02,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 978 transitions. [2023-08-04 03:40:02,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.0) internal successors, (978), 3 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:40:02,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 646.0) internal successors, (2584), 4 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:40:02,584 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 646.0) internal successors, (2584), 4 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:40:02,584 INFO L175 Difference]: Start difference. First operand has 79 places, 86 transitions, 224 flow. Second operand 3 states and 978 transitions. [2023-08-04 03:40:02,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 141 transitions, 610 flow [2023-08-04 03:40:02,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 141 transitions, 608 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:40:02,626 INFO L231 Difference]: Finished difference. Result has 81 places, 87 transitions, 234 flow [2023-08-04 03:40:02,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=646, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=81, PETRI_TRANSITIONS=87} [2023-08-04 03:40:02,627 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 2 predicate places. [2023-08-04 03:40:02,627 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 87 transitions, 234 flow [2023-08-04 03:40:02,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 286.0) internal successors, (858), 3 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:40:02,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:40:02,628 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] [2023-08-04 03:40:02,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 03:40:02,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-04 03:40:02,832 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:40:02,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:40:02,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1055431442, now seen corresponding path program 1 times [2023-08-04 03:40:02,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:40:02,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365429098] [2023-08-04 03:40:02,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:40:02,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:40:02,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:40:02,905 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 03:40:02,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:40:02,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365429098] [2023-08-04 03:40:02,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365429098] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:40:02,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478104450] [2023-08-04 03:40:02,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:40:02,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:40:02,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:40:02,925 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:40:02,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 03:40:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:40:03,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:40:03,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:40:03,076 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 03:40:03,076 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:40:03,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478104450] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:40:03,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:40:03,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 03:40:03,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430516631] [2023-08-04 03:40:03,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:40:03,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:40:03,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:40:03,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:40:03,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:40:03,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 646 [2023-08-04 03:40:03,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 87 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 287.3333333333333) internal successors, (862), 3 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:40:03,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:40:03,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 646 [2023-08-04 03:40:03,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:40:33,866 INFO L124 PetriNetUnfolderBase]: 487801/604937 cut-off events. [2023-08-04 03:40:33,866 INFO L125 PetriNetUnfolderBase]: For 130366/130366 co-relation queries the response was YES. [2023-08-04 03:40:34,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1280209 conditions, 604937 events. 487801/604937 cut-off events. For 130366/130366 co-relation queries the response was YES. Maximal size of possible extension queue 14513. Compared 3661328 event pairs, 296451 based on Foata normal form. 0/390631 useless extension candidates. Maximal degree in co-relation 523329. Up to 535778 conditions per place. [2023-08-04 03:40:36,448 INFO L140 encePairwiseOnDemand]: 643/646 looper letters, 132 selfloop transitions, 2 changer transitions 0/142 dead transitions. [2023-08-04 03:40:36,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 142 transitions, 622 flow [2023-08-04 03:40:36,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:40:36,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:40:36,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 978 transitions. [2023-08-04 03:40:36,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046439628482973 [2023-08-04 03:40:36,450 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 978 transitions. [2023-08-04 03:40:36,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 978 transitions. [2023-08-04 03:40:36,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:40:36,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 978 transitions. [2023-08-04 03:40:36,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.0) internal successors, (978), 3 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:40:36,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 646.0) internal successors, (2584), 4 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:40:36,463 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 646.0) internal successors, (2584), 4 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:40:36,463 INFO L175 Difference]: Start difference. First operand has 81 places, 87 transitions, 234 flow. Second operand 3 states and 978 transitions. [2023-08-04 03:40:36,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 142 transitions, 622 flow [2023-08-04 03:40:41,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 142 transitions, 620 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:40:41,817 INFO L231 Difference]: Finished difference. Result has 83 places, 88 transitions, 244 flow [2023-08-04 03:40:41,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=646, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=83, PETRI_TRANSITIONS=88} [2023-08-04 03:40:41,818 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 4 predicate places. [2023-08-04 03:40:41,818 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 88 transitions, 244 flow [2023-08-04 03:40:41,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 287.3333333333333) internal successors, (862), 3 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:40:41,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:40:41,818 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] [2023-08-04 03:40:41,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 03:40:42,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:40:42,019 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:40:42,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:40:42,019 INFO L85 PathProgramCache]: Analyzing trace with hash 236282453, now seen corresponding path program 1 times [2023-08-04 03:40:42,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:40:42,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001185445] [2023-08-04 03:40:42,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:40:42,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:40:42,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:40:42,066 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 03:40:42,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:40:42,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001185445] [2023-08-04 03:40:42,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001185445] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:40:42,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126189481] [2023-08-04 03:40:42,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:40:42,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:40:42,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:40:42,077 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:40:42,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 03:40:42,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:40:42,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 03:40:42,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:40:42,168 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 03:40:42,168 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:40:42,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126189481] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:40:42,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:40:42,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 03:40:42,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969557203] [2023-08-04 03:40:42,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:40:42,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:40:42,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:40:42,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:40:42,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:40:42,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 646 [2023-08-04 03:40:42,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 88 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 289.0) internal successors, (867), 3 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:40:42,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:40:42,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 646 [2023-08-04 03:40:42,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:41:13,855 INFO L124 PetriNetUnfolderBase]: 487801/604938 cut-off events. [2023-08-04 03:41:13,856 INFO L125 PetriNetUnfolderBase]: For 104416/104416 co-relation queries the response was YES. [2023-08-04 03:41:14,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1283018 conditions, 604938 events. 487801/604938 cut-off events. For 104416/104416 co-relation queries the response was YES. Maximal size of possible extension queue 14513. Compared 3656027 event pairs, 330455 based on Foata normal form. 1/391505 useless extension candidates. Maximal degree in co-relation 1119491. Up to 599029 conditions per place. [2023-08-04 03:41:16,585 INFO L140 encePairwiseOnDemand]: 643/646 looper letters, 79 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2023-08-04 03:41:16,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 89 transitions, 408 flow [2023-08-04 03:41:16,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:41:16,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:41:16,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 924 transitions. [2023-08-04 03:41:16,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47678018575851394 [2023-08-04 03:41:16,588 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 924 transitions. [2023-08-04 03:41:16,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 924 transitions. [2023-08-04 03:41:16,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:41:16,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 924 transitions. [2023-08-04 03:41:16,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 308.0) internal successors, (924), 3 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:41:16,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 646.0) internal successors, (2584), 4 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:41:16,592 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 646.0) internal successors, (2584), 4 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:41:16,592 INFO L175 Difference]: Start difference. First operand has 83 places, 88 transitions, 244 flow. Second operand 3 states and 924 transitions. [2023-08-04 03:41:16,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 89 transitions, 408 flow [2023-08-04 03:41:29,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 89 transitions, 406 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:41:29,504 INFO L231 Difference]: Finished difference. Result has 85 places, 89 transitions, 254 flow [2023-08-04 03:41:29,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=646, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=85, PETRI_TRANSITIONS=89} [2023-08-04 03:41:29,504 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 6 predicate places. [2023-08-04 03:41:29,504 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 89 transitions, 254 flow [2023-08-04 03:41:29,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 289.0) internal successors, (867), 3 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:41:29,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:41:29,505 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] [2023-08-04 03:41:29,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-04 03:41:29,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:41:29,711 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:41:29,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:41:29,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1665130212, now seen corresponding path program 1 times [2023-08-04 03:41:29,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:41:29,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705937412] [2023-08-04 03:41:29,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:41:29,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:41:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:41:29,764 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 03:41:29,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:41:29,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705937412] [2023-08-04 03:41:29,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705937412] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:41:29,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499359580] [2023-08-04 03:41:29,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:41:29,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:41:29,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:41:29,766 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:41:29,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 03:41:29,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:41:29,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:41:29,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:41:29,857 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 03:41:29,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:41:29,870 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 03:41:29,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499359580] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:41:29,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:41:29,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:41:29,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810757517] [2023-08-04 03:41:29,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:41:29,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:41:29,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:41:29,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:41:29,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:41:29,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 646 [2023-08-04 03:41:29,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 89 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 286.4) internal successors, (1432), 5 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:41:29,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:41:29,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 646 [2023-08-04 03:41:29,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:41:57,340 INFO L124 PetriNetUnfolderBase]: 447123/551271 cut-off events. [2023-08-04 03:41:57,340 INFO L125 PetriNetUnfolderBase]: For 86120/86120 co-relation queries the response was YES. [2023-08-04 03:41:58,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1168797 conditions, 551271 events. 447123/551271 cut-off events. For 86120/86120 co-relation queries the response was YES. Maximal size of possible extension queue 13616. Compared 3241977 event pairs, 174791 based on Foata normal form. 6/354577 useless extension candidates. Maximal degree in co-relation 1168778. Up to 546846 conditions per place. [2023-08-04 03:41:59,777 INFO L140 encePairwiseOnDemand]: 642/646 looper letters, 94 selfloop transitions, 3 changer transitions 1/106 dead transitions. [2023-08-04 03:41:59,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 106 transitions, 484 flow [2023-08-04 03:41:59,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:41:59,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:41:59,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1219 transitions. [2023-08-04 03:41:59,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47174922600619196 [2023-08-04 03:41:59,779 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1219 transitions. [2023-08-04 03:41:59,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1219 transitions. [2023-08-04 03:41:59,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:41:59,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1219 transitions. [2023-08-04 03:41:59,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 304.75) internal successors, (1219), 4 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:41:59,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 646.0) internal successors, (3230), 5 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:41:59,784 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 646.0) internal successors, (3230), 5 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:41:59,784 INFO L175 Difference]: Start difference. First operand has 85 places, 89 transitions, 254 flow. Second operand 4 states and 1219 transitions. [2023-08-04 03:41:59,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 106 transitions, 484 flow [2023-08-04 03:42:04,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 106 transitions, 480 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 03:42:04,396 INFO L231 Difference]: Finished difference. Result has 89 places, 89 transitions, 264 flow [2023-08-04 03:42:04,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=646, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=264, PETRI_PLACES=89, PETRI_TRANSITIONS=89} [2023-08-04 03:42:04,397 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 10 predicate places. [2023-08-04 03:42:04,397 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 89 transitions, 264 flow [2023-08-04 03:42:04,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 286.4) internal successors, (1432), 5 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:42:04,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:42:04,397 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] [2023-08-04 03:42:04,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 03:42:04,602 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,SelfDestructingSolverStorable12 [2023-08-04 03:42:04,602 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:42:04,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:42:04,603 INFO L85 PathProgramCache]: Analyzing trace with hash 2101014333, now seen corresponding path program 1 times [2023-08-04 03:42:04,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:42:04,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069127242] [2023-08-04 03:42:04,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:42:04,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:42:04,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:42:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 03:42:04,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:42:04,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069127242] [2023-08-04 03:42:04,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069127242] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:42:04,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146243139] [2023-08-04 03:42:04,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:42:04,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:42:04,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:42:04,666 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:42:04,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 03:42:04,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:42:04,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:42:04,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:42:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 03:42:04,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:42:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 03:42:04,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146243139] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:42:04,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:42:04,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:42:04,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251643435] [2023-08-04 03:42:04,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:42:04,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:42:04,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:42:04,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:42:04,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:42:04,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 646 [2023-08-04 03:42:04,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 89 transitions, 264 flow. Second operand has 5 states, 5 states have (on average 286.2) internal successors, (1431), 5 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:42:04,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:42:04,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 646 [2023-08-04 03:42:04,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:42:33,904 INFO L124 PetriNetUnfolderBase]: 438755/545117 cut-off events. [2023-08-04 03:42:33,904 INFO L125 PetriNetUnfolderBase]: For 40327/40327 co-relation queries the response was YES. [2023-08-04 03:42:34,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1150416 conditions, 545117 events. 438755/545117 cut-off events. For 40327/40327 co-relation queries the response was YES. Maximal size of possible extension queue 13724. Compared 3326887 event pairs, 109907 based on Foata normal form. 648/354038 useless extension candidates. Maximal degree in co-relation 1150389. Up to 391434 conditions per place. [2023-08-04 03:42:36,483 INFO L140 encePairwiseOnDemand]: 642/646 looper letters, 157 selfloop transitions, 3 changer transitions 1/169 dead transitions. [2023-08-04 03:42:36,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 169 transitions, 746 flow [2023-08-04 03:42:36,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:42:36,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:42:36,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1282 transitions. [2023-08-04 03:42:36,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49613003095975233 [2023-08-04 03:42:36,486 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1282 transitions. [2023-08-04 03:42:36,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1282 transitions. [2023-08-04 03:42:36,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:42:36,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1282 transitions. [2023-08-04 03:42:36,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 320.5) internal successors, (1282), 4 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:42:36,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 646.0) internal successors, (3230), 5 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:42:36,492 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 646.0) internal successors, (3230), 5 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:42:36,492 INFO L175 Difference]: Start difference. First operand has 89 places, 89 transitions, 264 flow. Second operand 4 states and 1282 transitions. [2023-08-04 03:42:36,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 169 transitions, 746 flow [2023-08-04 03:43:29,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 169 transitions, 737 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 03:43:29,634 INFO L231 Difference]: Finished difference. Result has 91 places, 89 transitions, 269 flow [2023-08-04 03:43:29,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=646, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=269, PETRI_PLACES=91, PETRI_TRANSITIONS=89} [2023-08-04 03:43:29,634 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 12 predicate places. [2023-08-04 03:43:29,634 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 89 transitions, 269 flow [2023-08-04 03:43:29,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 286.2) internal successors, (1431), 5 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:43:29,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:43:29,635 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] [2023-08-04 03:43:29,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 03:43:29,835 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,SelfDestructingSolverStorable13 [2023-08-04 03:43:29,835 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:43:29,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:43:29,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1895721912, now seen corresponding path program 1 times [2023-08-04 03:43:29,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:43:29,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386730919] [2023-08-04 03:43:29,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:43:29,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:43:29,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:43:29,889 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 03:43:29,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:43:29,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386730919] [2023-08-04 03:43:29,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386730919] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:43:29,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960217041] [2023-08-04 03:43:29,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:43:29,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:43:29,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:43:29,891 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:43:29,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 03:43:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:43:29,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:43:29,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:43:29,982 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 03:43:29,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:43:29,991 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 03:43:29,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960217041] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:43:29,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:43:29,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:43:29,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718456724] [2023-08-04 03:43:29,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:43:29,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:43:29,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:43:29,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:43:29,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:43:30,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 646 [2023-08-04 03:43:30,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 89 transitions, 269 flow. Second operand has 5 states, 5 states have (on average 286.4) internal successors, (1432), 5 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:43:30,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:43:30,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 646 [2023-08-04 03:43:30,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand