./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/clever.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/clever.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 01:46:35,218 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 01:46:35,265 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 01:46:35,271 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 01:46:35,271 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 01:46:35,295 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 01:46:35,295 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 01:46:35,295 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 01:46:35,296 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 01:46:35,296 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 01:46:35,296 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 01:46:35,296 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 01:46:35,297 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 01:46:35,297 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 01:46:35,297 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 01:46:35,297 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 01:46:35,298 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 01:46:35,298 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 01:46:35,298 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 01:46:35,298 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 01:46:35,298 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 01:46:35,299 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 01:46:35,299 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 01:46:35,299 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 01:46:35,300 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 01:46:35,300 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 01:46:35,300 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 01:46:35,302 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 01:46:35,302 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 01:46:35,302 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 01:46:35,303 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 01:46:35,303 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 01:46:35,303 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:46:35,303 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 01:46:35,303 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 01:46:35,303 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 01:46:35,303 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 01:46:35,304 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 01:46:35,304 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 01:46:35,304 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 01:46:35,304 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 01:46:35,305 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 01:46:35,305 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d [2024-11-19 01:46:35,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 01:46:35,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 01:46:35,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 01:46:35,563 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 01:46:35,563 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 01:46:35,564 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/clever.wvr.c [2024-11-19 01:46:36,737 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 01:46:36,895 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 01:46:36,895 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/clever.wvr.c [2024-11-19 01:46:36,901 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b27f4b00/6fc74262ff7a4c9abccee3cfe182804b/FLAGeb4797fba [2024-11-19 01:46:37,314 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b27f4b00/6fc74262ff7a4c9abccee3cfe182804b [2024-11-19 01:46:37,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 01:46:37,317 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 01:46:37,318 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 01:46:37,318 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 01:46:37,322 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 01:46:37,322 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:46:37" (1/1) ... [2024-11-19 01:46:37,323 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@251545e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:37, skipping insertion in model container [2024-11-19 01:46:37,323 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:46:37" (1/1) ... [2024-11-19 01:46:37,343 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 01:46:37,495 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/clever.wvr.c[2159,2172] [2024-11-19 01:46:37,500 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:46:37,507 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 01:46:37,522 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/clever.wvr.c[2159,2172] [2024-11-19 01:46:37,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:46:37,536 INFO L204 MainTranslator]: Completed translation [2024-11-19 01:46:37,537 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:37 WrapperNode [2024-11-19 01:46:37,537 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 01:46:37,537 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 01:46:37,538 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 01:46:37,538 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 01:46:37,542 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:37" (1/1) ... [2024-11-19 01:46:37,547 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:37" (1/1) ... [2024-11-19 01:46:37,561 INFO L138 Inliner]: procedures = 18, calls = 11, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2024-11-19 01:46:37,561 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 01:46:37,562 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 01:46:37,562 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 01:46:37,562 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 01:46:37,571 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:37" (1/1) ... [2024-11-19 01:46:37,572 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:37" (1/1) ... [2024-11-19 01:46:37,573 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:37" (1/1) ... [2024-11-19 01:46:37,583 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-19 01:46:37,583 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:37" (1/1) ... [2024-11-19 01:46:37,583 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:37" (1/1) ... [2024-11-19 01:46:37,587 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:37" (1/1) ... [2024-11-19 01:46:37,589 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:37" (1/1) ... [2024-11-19 01:46:37,590 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:37" (1/1) ... [2024-11-19 01:46:37,591 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:37" (1/1) ... [2024-11-19 01:46:37,592 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 01:46:37,593 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 01:46:37,593 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 01:46:37,593 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 01:46:37,593 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:37" (1/1) ... [2024-11-19 01:46:37,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:46:37,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:46:37,624 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 01:46:37,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 01:46:37,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 01:46:37,660 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 01:46:37,660 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 01:46:37,661 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 01:46:37,661 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 01:46:37,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 01:46:37,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 01:46:37,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 01:46:37,662 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 01:46:37,733 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 01:46:37,735 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 01:46:37,909 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 01:46:37,910 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 01:46:38,044 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 01:46:38,044 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-19 01:46:38,044 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:46:38 BoogieIcfgContainer [2024-11-19 01:46:38,045 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 01:46:38,046 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 01:46:38,046 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 01:46:38,049 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 01:46:38,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:46:37" (1/3) ... [2024-11-19 01:46:38,050 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d951023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:46:38, skipping insertion in model container [2024-11-19 01:46:38,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:46:37" (2/3) ... [2024-11-19 01:46:38,050 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d951023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:46:38, skipping insertion in model container [2024-11-19 01:46:38,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:46:38" (3/3) ... [2024-11-19 01:46:38,052 INFO L112 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2024-11-19 01:46:38,063 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 01:46:38,064 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 01:46:38,064 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 01:46:38,098 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-19 01:46:38,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-11-19 01:46:38,144 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-11-19 01:46:38,145 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 01:46:38,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 16 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 13. Up to 2 conditions per place. [2024-11-19 01:46:38,149 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-11-19 01:46:38,151 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-11-19 01:46:38,162 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 01:46:38,167 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@69b041b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 01:46:38,168 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-19 01:46:38,175 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 01:46:38,175 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-11-19 01:46:38,176 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 01:46:38,176 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:38,177 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:46:38,177 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:38,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:38,182 INFO L85 PathProgramCache]: Analyzing trace with hash 871523174, now seen corresponding path program 1 times [2024-11-19 01:46:38,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:38,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987077308] [2024-11-19 01:46:38,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:46:38,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:38,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:46:38,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:38,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:38,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987077308] [2024-11-19 01:46:38,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987077308] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:46:38,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:46:38,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 01:46:38,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75126583] [2024-11-19 01:46:38,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:46:38,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 01:46:38,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:38,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 01:46:38,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 01:46:38,576 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-19 01:46:38,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:38,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:38,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-19 01:46:38,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:38,662 INFO L124 PetriNetUnfolderBase]: 106/171 cut-off events. [2024-11-19 01:46:38,662 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-19 01:46:38,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 171 events. 106/171 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 522 event pairs, 19 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 318. Up to 110 conditions per place. [2024-11-19 01:46:38,666 INFO L140 encePairwiseOnDemand]: 16/20 looper letters, 21 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2024-11-19 01:46:38,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 127 flow [2024-11-19 01:46:38,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 01:46:38,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 01:46:38,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2024-11-19 01:46:38,677 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2024-11-19 01:46:38,678 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 41 transitions. [2024-11-19 01:46:38,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 127 flow [2024-11-19 01:46:38,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 01:46:38,682 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2024-11-19 01:46:38,684 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2024-11-19 01:46:38,686 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2024-11-19 01:46:38,686 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2024-11-19 01:46:38,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:38,687 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:38,687 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:46:38,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 01:46:38,687 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:38,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:38,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1246336607, now seen corresponding path program 1 times [2024-11-19 01:46:38,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:38,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461783430] [2024-11-19 01:46:38,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:46:38,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:46:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:38,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:38,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461783430] [2024-11-19 01:46:38,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461783430] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:46:38,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:46:38,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 01:46:38,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952339941] [2024-11-19 01:46:38,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:46:38,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:46:38,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:38,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:46:38,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:46:38,767 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-19 01:46:38,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:38,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:38,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-19 01:46:38,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:38,885 INFO L124 PetriNetUnfolderBase]: 145/242 cut-off events. [2024-11-19 01:46:38,886 INFO L125 PetriNetUnfolderBase]: For 52/56 co-relation queries the response was YES. [2024-11-19 01:46:38,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 242 events. 145/242 cut-off events. For 52/56 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 815 event pairs, 12 based on Foata normal form. 7/220 useless extension candidates. Maximal degree in co-relation 172. Up to 96 conditions per place. [2024-11-19 01:46:38,888 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 37 selfloop transitions, 7 changer transitions 2/49 dead transitions. [2024-11-19 01:46:38,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 49 transitions, 236 flow [2024-11-19 01:46:38,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:46:38,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:46:38,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-11-19 01:46:38,889 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-11-19 01:46:38,889 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 5 states and 66 transitions. [2024-11-19 01:46:38,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 49 transitions, 236 flow [2024-11-19 01:46:38,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 49 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 01:46:38,891 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 105 flow [2024-11-19 01:46:38,891 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=105, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2024-11-19 01:46:38,891 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2024-11-19 01:46:38,892 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 105 flow [2024-11-19 01:46:38,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:38,892 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:38,892 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:46:38,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 01:46:38,893 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:38,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:38,894 INFO L85 PathProgramCache]: Analyzing trace with hash -461020965, now seen corresponding path program 2 times [2024-11-19 01:46:38,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:38,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600942323] [2024-11-19 01:46:38,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:46:38,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:38,907 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:46:38,907 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:38,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:38,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:38,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600942323] [2024-11-19 01:46:38,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600942323] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:46:38,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:46:38,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 01:46:38,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579173679] [2024-11-19 01:46:38,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:46:38,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:46:38,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:38,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:46:38,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:46:38,951 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-19 01:46:38,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 105 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:38,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:38,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-19 01:46:38,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:39,035 INFO L124 PetriNetUnfolderBase]: 146/238 cut-off events. [2024-11-19 01:46:39,035 INFO L125 PetriNetUnfolderBase]: For 202/202 co-relation queries the response was YES. [2024-11-19 01:46:39,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 747 conditions, 238 events. 146/238 cut-off events. For 202/202 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 773 event pairs, 14 based on Foata normal form. 4/239 useless extension candidates. Maximal degree in co-relation 306. Up to 103 conditions per place. [2024-11-19 01:46:39,037 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 31 selfloop transitions, 11 changer transitions 5/50 dead transitions. [2024-11-19 01:46:39,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 50 transitions, 299 flow [2024-11-19 01:46:39,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:46:39,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:46:39,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-11-19 01:46:39,040 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-11-19 01:46:39,040 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 105 flow. Second operand 5 states and 62 transitions. [2024-11-19 01:46:39,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 50 transitions, 299 flow [2024-11-19 01:46:39,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 50 transitions, 299 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-19 01:46:39,045 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 170 flow [2024-11-19 01:46:39,046 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2024-11-19 01:46:39,046 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 12 predicate places. [2024-11-19 01:46:39,046 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 170 flow [2024-11-19 01:46:39,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:39,046 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:39,046 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:46:39,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 01:46:39,047 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:39,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:39,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1781691219, now seen corresponding path program 1 times [2024-11-19 01:46:39,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:39,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641165976] [2024-11-19 01:46:39,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:46:39,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:46:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:46:39,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:39,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641165976] [2024-11-19 01:46:39,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641165976] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:46:39,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017153399] [2024-11-19 01:46:39,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:46:39,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:46:39,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:46:39,093 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) [2024-11-19 01:46:39,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 01:46:39,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:46:39,151 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-19 01:46:39,154 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:46:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:46:39,246 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:46:39,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:46:39,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017153399] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:46:39,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:46:39,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-11-19 01:46:39,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760471617] [2024-11-19 01:46:39,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:46:39,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 01:46:39,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:39,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 01:46:39,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 01:46:39,286 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-19 01:46:39,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:39,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:39,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-19 01:46:39,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:39,379 INFO L124 PetriNetUnfolderBase]: 127/223 cut-off events. [2024-11-19 01:46:39,379 INFO L125 PetriNetUnfolderBase]: For 330/330 co-relation queries the response was YES. [2024-11-19 01:46:39,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 841 conditions, 223 events. 127/223 cut-off events. For 330/330 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 689 event pairs, 2 based on Foata normal form. 18/239 useless extension candidates. Maximal degree in co-relation 498. Up to 91 conditions per place. [2024-11-19 01:46:39,383 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 41 selfloop transitions, 9 changer transitions 3/56 dead transitions. [2024-11-19 01:46:39,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 56 transitions, 409 flow [2024-11-19 01:46:39,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:46:39,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:46:39,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2024-11-19 01:46:39,385 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-11-19 01:46:39,385 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 170 flow. Second operand 5 states and 65 transitions. [2024-11-19 01:46:39,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 56 transitions, 409 flow [2024-11-19 01:46:39,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 56 transitions, 403 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-11-19 01:46:39,392 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 242 flow [2024-11-19 01:46:39,392 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=242, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2024-11-19 01:46:39,392 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 18 predicate places. [2024-11-19 01:46:39,393 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 242 flow [2024-11-19 01:46:39,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:39,393 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:39,393 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:46:39,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 01:46:39,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:46:39,594 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:39,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:39,595 INFO L85 PathProgramCache]: Analyzing trace with hash -505918620, now seen corresponding path program 1 times [2024-11-19 01:46:39,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:39,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717281213] [2024-11-19 01:46:39,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:46:39,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:46:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:39,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:39,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717281213] [2024-11-19 01:46:39,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717281213] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:46:39,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351946508] [2024-11-19 01:46:39,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:46:39,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:46:39,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:46:39,854 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) [2024-11-19 01:46:39,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 01:46:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:46:39,904 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 01:46:39,905 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:46:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:40,065 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:46:40,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:40,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351946508] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:46:40,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:46:40,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-19 01:46:40,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230568785] [2024-11-19 01:46:40,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:46:40,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 01:46:40,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:40,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 01:46:40,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2024-11-19 01:46:40,199 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-19 01:46:40,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 242 flow. Second operand has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:40,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:40,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-19 01:46:40,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:40,422 INFO L124 PetriNetUnfolderBase]: 249/435 cut-off events. [2024-11-19 01:46:40,422 INFO L125 PetriNetUnfolderBase]: For 779/779 co-relation queries the response was YES. [2024-11-19 01:46:40,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1797 conditions, 435 events. 249/435 cut-off events. For 779/779 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1668 event pairs, 10 based on Foata normal form. 14/447 useless extension candidates. Maximal degree in co-relation 1002. Up to 176 conditions per place. [2024-11-19 01:46:40,426 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 62 selfloop transitions, 19 changer transitions 21/105 dead transitions. [2024-11-19 01:46:40,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 105 transitions, 891 flow [2024-11-19 01:46:40,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 01:46:40,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 01:46:40,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-11-19 01:46:40,427 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-11-19 01:46:40,427 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 242 flow. Second operand 9 states and 119 transitions. [2024-11-19 01:46:40,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 105 transitions, 891 flow [2024-11-19 01:46:40,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 105 transitions, 881 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-19 01:46:40,432 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 428 flow [2024-11-19 01:46:40,432 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=428, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2024-11-19 01:46:40,433 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2024-11-19 01:46:40,433 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 428 flow [2024-11-19 01:46:40,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:40,433 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:40,433 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:46:40,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-19 01:46:40,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:46:40,638 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:40,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:40,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1334491405, now seen corresponding path program 2 times [2024-11-19 01:46:40,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:40,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112764032] [2024-11-19 01:46:40,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:46:40,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:40,646 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:46:40,646 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:46:40,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:40,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112764032] [2024-11-19 01:46:40,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112764032] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:46:40,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:46:40,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 01:46:40,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957068264] [2024-11-19 01:46:40,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:46:40,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:46:40,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:40,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:46:40,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:46:40,674 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-19 01:46:40,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 428 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:40,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:40,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-19 01:46:40,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:40,745 INFO L124 PetriNetUnfolderBase]: 192/331 cut-off events. [2024-11-19 01:46:40,745 INFO L125 PetriNetUnfolderBase]: For 1058/1064 co-relation queries the response was YES. [2024-11-19 01:46:40,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1555 conditions, 331 events. 192/331 cut-off events. For 1058/1064 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1120 event pairs, 25 based on Foata normal form. 3/331 useless extension candidates. Maximal degree in co-relation 1517. Up to 152 conditions per place. [2024-11-19 01:46:40,747 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 53 selfloop transitions, 12 changer transitions 2/70 dead transitions. [2024-11-19 01:46:40,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 70 transitions, 703 flow [2024-11-19 01:46:40,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:46:40,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:46:40,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2024-11-19 01:46:40,748 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-11-19 01:46:40,748 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 428 flow. Second operand 5 states and 59 transitions. [2024-11-19 01:46:40,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 70 transitions, 703 flow [2024-11-19 01:46:40,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 70 transitions, 646 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-11-19 01:46:40,755 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 464 flow [2024-11-19 01:46:40,755 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=464, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-11-19 01:46:40,757 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 33 predicate places. [2024-11-19 01:46:40,757 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 464 flow [2024-11-19 01:46:40,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:40,757 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:40,757 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:46:40,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 01:46:40,758 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:40,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:40,758 INFO L85 PathProgramCache]: Analyzing trace with hash 2029300336, now seen corresponding path program 2 times [2024-11-19 01:46:40,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:40,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516118029] [2024-11-19 01:46:40,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:46:40,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:40,774 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:46:40,774 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:40,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:40,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516118029] [2024-11-19 01:46:40,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516118029] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:46:40,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639178119] [2024-11-19 01:46:40,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:46:40,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:46:40,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:46:40,935 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) [2024-11-19 01:46:40,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 01:46:40,978 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:46:40,978 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:40,979 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 01:46:40,980 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:46:41,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:41,133 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:46:41,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:41,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639178119] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:46:41,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:46:41,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-19 01:46:41,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092219189] [2024-11-19 01:46:41,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:46:41,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 01:46:41,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:41,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 01:46:41,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2024-11-19 01:46:41,237 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-19 01:46:41,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 464 flow. Second operand has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:41,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:41,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-19 01:46:41,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:41,732 INFO L124 PetriNetUnfolderBase]: 624/1068 cut-off events. [2024-11-19 01:46:41,732 INFO L125 PetriNetUnfolderBase]: For 4195/4195 co-relation queries the response was YES. [2024-11-19 01:46:41,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5018 conditions, 1068 events. 624/1068 cut-off events. For 4195/4195 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5018 event pairs, 41 based on Foata normal form. 8/1075 useless extension candidates. Maximal degree in co-relation 4302. Up to 300 conditions per place. [2024-11-19 01:46:41,741 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 134 selfloop transitions, 86 changer transitions 11/234 dead transitions. [2024-11-19 01:46:41,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 234 transitions, 2364 flow [2024-11-19 01:46:41,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-19 01:46:41,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-19 01:46:41,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 223 transitions. [2024-11-19 01:46:41,744 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6558823529411765 [2024-11-19 01:46:41,744 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 464 flow. Second operand 17 states and 223 transitions. [2024-11-19 01:46:41,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 234 transitions, 2364 flow [2024-11-19 01:46:41,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 234 transitions, 2261 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-11-19 01:46:41,757 INFO L231 Difference]: Finished difference. Result has 80 places, 135 transitions, 1563 flow [2024-11-19 01:46:41,758 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1563, PETRI_PLACES=80, PETRI_TRANSITIONS=135} [2024-11-19 01:46:41,759 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 59 predicate places. [2024-11-19 01:46:41,759 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 135 transitions, 1563 flow [2024-11-19 01:46:41,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:41,760 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:41,760 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:46:41,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 01:46:41,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:46:41,965 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:41,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:41,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1101021392, now seen corresponding path program 3 times [2024-11-19 01:46:41,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:41,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072665703] [2024-11-19 01:46:41,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:46:41,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:41,984 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 01:46:41,984 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:42,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:42,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:42,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072665703] [2024-11-19 01:46:42,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072665703] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:46:42,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997660991] [2024-11-19 01:46:42,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:46:42,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:46:42,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:46:42,137 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) [2024-11-19 01:46:42,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 01:46:42,176 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 01:46:42,176 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:42,177 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 01:46:42,178 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:46:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:42,301 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:46:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:42,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997660991] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:46:42,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:46:42,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-19 01:46:42,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394987720] [2024-11-19 01:46:42,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:46:42,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 01:46:42,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:42,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 01:46:42,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2024-11-19 01:46:42,400 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-19 01:46:42,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 135 transitions, 1563 flow. Second operand has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:42,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:42,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-19 01:46:42,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:42,929 INFO L124 PetriNetUnfolderBase]: 1342/2300 cut-off events. [2024-11-19 01:46:42,929 INFO L125 PetriNetUnfolderBase]: For 11594/11594 co-relation queries the response was YES. [2024-11-19 01:46:42,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12439 conditions, 2300 events. 1342/2300 cut-off events. For 11594/11594 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 12744 event pairs, 114 based on Foata normal form. 7/2306 useless extension candidates. Maximal degree in co-relation 11785. Up to 611 conditions per place. [2024-11-19 01:46:42,948 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 183 selfloop transitions, 151 changer transitions 11/348 dead transitions. [2024-11-19 01:46:42,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 348 transitions, 4461 flow [2024-11-19 01:46:42,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 01:46:42,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 01:46:42,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 144 transitions. [2024-11-19 01:46:42,950 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6545454545454545 [2024-11-19 01:46:42,950 INFO L175 Difference]: Start difference. First operand has 80 places, 135 transitions, 1563 flow. Second operand 11 states and 144 transitions. [2024-11-19 01:46:42,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 348 transitions, 4461 flow [2024-11-19 01:46:42,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 348 transitions, 4153 flow, removed 151 selfloop flow, removed 2 redundant places. [2024-11-19 01:46:42,989 INFO L231 Difference]: Finished difference. Result has 93 places, 241 transitions, 3257 flow [2024-11-19 01:46:42,989 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1405, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3257, PETRI_PLACES=93, PETRI_TRANSITIONS=241} [2024-11-19 01:46:42,990 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 72 predicate places. [2024-11-19 01:46:42,990 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 241 transitions, 3257 flow [2024-11-19 01:46:42,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:42,990 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:42,990 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:46:43,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 01:46:43,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:46:43,191 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:43,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:43,192 INFO L85 PathProgramCache]: Analyzing trace with hash 593318763, now seen corresponding path program 1 times [2024-11-19 01:46:43,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:43,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424844674] [2024-11-19 01:46:43,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:46:43,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:46:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:46:43,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:43,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424844674] [2024-11-19 01:46:43,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424844674] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:46:43,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222449352] [2024-11-19 01:46:43,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:46:43,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:46:43,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:46:43,248 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) [2024-11-19 01:46:43,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 01:46:43,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:46:43,292 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 01:46:43,293 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:46:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:46:43,351 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:46:43,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:46:43,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222449352] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:46:43,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:46:43,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-19 01:46:43,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991375645] [2024-11-19 01:46:43,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:46:43,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:46:43,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:43,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:46:43,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:46:43,376 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-19 01:46:43,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 241 transitions, 3257 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:43,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:43,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-19 01:46:43,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:43,975 INFO L124 PetriNetUnfolderBase]: 2084/3651 cut-off events. [2024-11-19 01:46:43,976 INFO L125 PetriNetUnfolderBase]: For 24655/24661 co-relation queries the response was YES. [2024-11-19 01:46:43,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21377 conditions, 3651 events. 2084/3651 cut-off events. For 24655/24661 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 23277 event pairs, 25 based on Foata normal form. 49/3698 useless extension candidates. Maximal degree in co-relation 20652. Up to 988 conditions per place. [2024-11-19 01:46:44,004 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 382 selfloop transitions, 144 changer transitions 2/531 dead transitions. [2024-11-19 01:46:44,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 531 transitions, 7693 flow [2024-11-19 01:46:44,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 01:46:44,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 01:46:44,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-11-19 01:46:44,006 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-11-19 01:46:44,006 INFO L175 Difference]: Start difference. First operand has 93 places, 241 transitions, 3257 flow. Second operand 12 states and 142 transitions. [2024-11-19 01:46:44,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 531 transitions, 7693 flow [2024-11-19 01:46:44,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 531 transitions, 7538 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-11-19 01:46:44,055 INFO L231 Difference]: Finished difference. Result has 106 places, 333 transitions, 5155 flow [2024-11-19 01:46:44,055 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3169, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5155, PETRI_PLACES=106, PETRI_TRANSITIONS=333} [2024-11-19 01:46:44,056 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 85 predicate places. [2024-11-19 01:46:44,056 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 333 transitions, 5155 flow [2024-11-19 01:46:44,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:44,056 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:44,056 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:46:44,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 01:46:44,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:46:44,258 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:44,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:44,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1701011657, now seen corresponding path program 2 times [2024-11-19 01:46:44,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:44,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76438609] [2024-11-19 01:46:44,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:46:44,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:44,265 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:46:44,265 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:44,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:46:44,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:44,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76438609] [2024-11-19 01:46:44,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76438609] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:46:44,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109056275] [2024-11-19 01:46:44,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:46:44,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:46:44,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:46:44,298 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) [2024-11-19 01:46:44,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 01:46:44,342 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:46:44,342 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:44,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 01:46:44,344 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:46:44,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:46:44,397 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:46:44,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:46:44,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109056275] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:46:44,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:46:44,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2024-11-19 01:46:44,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809906740] [2024-11-19 01:46:44,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:46:44,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 01:46:44,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:44,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 01:46:44,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-19 01:46:44,427 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-19 01:46:44,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 333 transitions, 5155 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:44,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:44,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-19 01:46:44,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:45,269 INFO L124 PetriNetUnfolderBase]: 2369/4322 cut-off events. [2024-11-19 01:46:45,270 INFO L125 PetriNetUnfolderBase]: For 37873/37873 co-relation queries the response was YES. [2024-11-19 01:46:45,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28318 conditions, 4322 events. 2369/4322 cut-off events. For 37873/37873 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 29722 event pairs, 157 based on Foata normal form. 28/4349 useless extension candidates. Maximal degree in co-relation 27966. Up to 1472 conditions per place. [2024-11-19 01:46:45,306 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 312 selfloop transitions, 275 changer transitions 0/590 dead transitions. [2024-11-19 01:46:45,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 590 transitions, 9758 flow [2024-11-19 01:46:45,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 01:46:45,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-19 01:46:45,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 162 transitions. [2024-11-19 01:46:45,307 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-11-19 01:46:45,308 INFO L175 Difference]: Start difference. First operand has 106 places, 333 transitions, 5155 flow. Second operand 14 states and 162 transitions. [2024-11-19 01:46:45,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 590 transitions, 9758 flow [2024-11-19 01:46:45,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 590 transitions, 9355 flow, removed 195 selfloop flow, removed 2 redundant places. [2024-11-19 01:46:45,437 INFO L231 Difference]: Finished difference. Result has 123 places, 432 transitions, 7318 flow [2024-11-19 01:46:45,438 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4828, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7318, PETRI_PLACES=123, PETRI_TRANSITIONS=432} [2024-11-19 01:46:45,438 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 102 predicate places. [2024-11-19 01:46:45,438 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 432 transitions, 7318 flow [2024-11-19 01:46:45,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:45,439 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:45,439 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:46:45,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 01:46:45,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:46:45,642 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:45,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:45,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1366077662, now seen corresponding path program 3 times [2024-11-19 01:46:45,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:45,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564713970] [2024-11-19 01:46:45,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:46:45,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:45,657 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 01:46:45,657 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:45,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:45,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:45,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564713970] [2024-11-19 01:46:45,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564713970] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:46:45,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686788386] [2024-11-19 01:46:45,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:46:45,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:46:45,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:46:45,840 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) [2024-11-19 01:46:45,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 01:46:45,900 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 01:46:45,901 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:45,901 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 01:46:45,903 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:46:46,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:46,239 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:46:46,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:46:46,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686788386] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:46:46,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:46:46,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 13 [2024-11-19 01:46:46,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725840936] [2024-11-19 01:46:46,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:46:46,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 01:46:46,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:46,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 01:46:46,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-19 01:46:46,315 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-19 01:46:46,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 432 transitions, 7318 flow. Second operand has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:46,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:46,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-19 01:46:46,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:47,709 INFO L124 PetriNetUnfolderBase]: 3537/6493 cut-off events. [2024-11-19 01:46:47,709 INFO L125 PetriNetUnfolderBase]: For 72437/72437 co-relation queries the response was YES. [2024-11-19 01:46:47,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45371 conditions, 6493 events. 3537/6493 cut-off events. For 72437/72437 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 46376 event pairs, 284 based on Foata normal form. 33/6525 useless extension candidates. Maximal degree in co-relation 44748. Up to 4009 conditions per place. [2024-11-19 01:46:47,760 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 561 selfloop transitions, 236 changer transitions 23/823 dead transitions. [2024-11-19 01:46:47,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 823 transitions, 15078 flow [2024-11-19 01:46:47,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-19 01:46:47,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-19 01:46:47,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 216 transitions. [2024-11-19 01:46:47,762 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6352941176470588 [2024-11-19 01:46:47,762 INFO L175 Difference]: Start difference. First operand has 123 places, 432 transitions, 7318 flow. Second operand 17 states and 216 transitions. [2024-11-19 01:46:47,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 823 transitions, 15078 flow [2024-11-19 01:46:48,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 823 transitions, 14699 flow, removed 184 selfloop flow, removed 2 redundant places. [2024-11-19 01:46:48,084 INFO L231 Difference]: Finished difference. Result has 146 places, 611 transitions, 11338 flow [2024-11-19 01:46:48,085 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7147, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=11338, PETRI_PLACES=146, PETRI_TRANSITIONS=611} [2024-11-19 01:46:48,085 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 125 predicate places. [2024-11-19 01:46:48,085 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 611 transitions, 11338 flow [2024-11-19 01:46:48,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:48,085 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:48,086 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:46:48,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-19 01:46:48,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:46:48,286 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:48,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:48,287 INFO L85 PathProgramCache]: Analyzing trace with hash 4438554, now seen corresponding path program 4 times [2024-11-19 01:46:48,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:48,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82708444] [2024-11-19 01:46:48,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:46:48,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:48,300 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:46:48,304 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:46:48,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:48,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82708444] [2024-11-19 01:46:48,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82708444] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:46:48,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588442113] [2024-11-19 01:46:48,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:46:48,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:46:48,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:46:48,457 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) [2024-11-19 01:46:48,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 01:46:48,511 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:46:48,512 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:48,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 01:46:48,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:46:48,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:48,722 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:46:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:46:48,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588442113] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:46:48,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:46:48,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 14 [2024-11-19 01:46:48,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109152175] [2024-11-19 01:46:48,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:46:48,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 01:46:48,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:48,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 01:46:48,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-19 01:46:48,803 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-19 01:46:48,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 611 transitions, 11338 flow. Second operand has 15 states, 15 states have (on average 7.4) internal successors, (111), 15 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:48,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:48,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-19 01:46:48,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:51,190 INFO L124 PetriNetUnfolderBase]: 4765/8800 cut-off events. [2024-11-19 01:46:51,190 INFO L125 PetriNetUnfolderBase]: For 123882/123882 co-relation queries the response was YES. [2024-11-19 01:46:51,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66094 conditions, 8800 events. 4765/8800 cut-off events. For 123882/123882 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 67100 event pairs, 406 based on Foata normal form. 16/8815 useless extension candidates. Maximal degree in co-relation 65223. Up to 6270 conditions per place. [2024-11-19 01:46:51,257 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 711 selfloop transitions, 291 changer transitions 16/1021 dead transitions. [2024-11-19 01:46:51,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 1021 transitions, 20445 flow [2024-11-19 01:46:51,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-19 01:46:51,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-19 01:46:51,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 255 transitions. [2024-11-19 01:46:51,258 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6710526315789473 [2024-11-19 01:46:51,258 INFO L175 Difference]: Start difference. First operand has 146 places, 611 transitions, 11338 flow. Second operand 19 states and 255 transitions. [2024-11-19 01:46:51,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 1021 transitions, 20445 flow [2024-11-19 01:46:51,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 1021 transitions, 19757 flow, removed 325 selfloop flow, removed 7 redundant places. [2024-11-19 01:46:51,815 INFO L231 Difference]: Finished difference. Result has 166 places, 845 transitions, 16923 flow [2024-11-19 01:46:51,815 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=10872, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=16923, PETRI_PLACES=166, PETRI_TRANSITIONS=845} [2024-11-19 01:46:51,816 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 145 predicate places. [2024-11-19 01:46:51,816 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 845 transitions, 16923 flow [2024-11-19 01:46:51,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.4) internal successors, (111), 15 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:51,816 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:51,816 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:46:51,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-19 01:46:52,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-19 01:46:52,020 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:52,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:52,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1308046356, now seen corresponding path program 5 times [2024-11-19 01:46:52,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:52,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617474919] [2024-11-19 01:46:52,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:46:52,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:52,030 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-19 01:46:52,030 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:52,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:52,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:52,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617474919] [2024-11-19 01:46:52,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617474919] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:46:52,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058373984] [2024-11-19 01:46:52,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:46:52,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:46:52,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:46:52,265 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) [2024-11-19 01:46:52,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 01:46:52,320 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-19 01:46:52,320 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:52,321 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 01:46:52,323 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:46:52,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:52,633 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:46:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:46:52,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058373984] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:46:52,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:46:52,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2024-11-19 01:46:52,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521899320] [2024-11-19 01:46:52,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:46:52,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 01:46:52,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:52,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 01:46:52,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-11-19 01:46:52,850 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-19 01:46:52,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 845 transitions, 16923 flow. Second operand has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:52,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:52,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-19 01:46:52,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:46:56,380 INFO L124 PetriNetUnfolderBase]: 5460/10061 cut-off events. [2024-11-19 01:46:56,381 INFO L125 PetriNetUnfolderBase]: For 167744/167744 co-relation queries the response was YES. [2024-11-19 01:46:56,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79054 conditions, 10061 events. 5460/10061 cut-off events. For 167744/167744 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 78751 event pairs, 449 based on Foata normal form. 10/10070 useless extension candidates. Maximal degree in co-relation 74919. Up to 5123 conditions per place. [2024-11-19 01:46:56,465 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 463 selfloop transitions, 686 changer transitions 12/1164 dead transitions. [2024-11-19 01:46:56,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 1164 transitions, 25155 flow [2024-11-19 01:46:56,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-19 01:46:56,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-19 01:46:56,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 237 transitions. [2024-11-19 01:46:56,467 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5925 [2024-11-19 01:46:56,467 INFO L175 Difference]: Start difference. First operand has 166 places, 845 transitions, 16923 flow. Second operand 20 states and 237 transitions. [2024-11-19 01:46:56,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 1164 transitions, 25155 flow [2024-11-19 01:46:57,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 1164 transitions, 24114 flow, removed 508 selfloop flow, removed 4 redundant places. [2024-11-19 01:46:57,448 INFO L231 Difference]: Finished difference. Result has 191 places, 1068 transitions, 23887 flow [2024-11-19 01:46:57,448 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=16130, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=483, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=23887, PETRI_PLACES=191, PETRI_TRANSITIONS=1068} [2024-11-19 01:46:57,449 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 170 predicate places. [2024-11-19 01:46:57,449 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 1068 transitions, 23887 flow [2024-11-19 01:46:57,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:57,449 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:46:57,449 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:46:57,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-19 01:46:57,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-19 01:46:57,650 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:46:57,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:46:57,650 INFO L85 PathProgramCache]: Analyzing trace with hash 2098924377, now seen corresponding path program 6 times [2024-11-19 01:46:57,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:46:57,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541754735] [2024-11-19 01:46:57,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:46:57,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:46:57,657 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-19 01:46:57,657 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:57,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:46:57,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541754735] [2024-11-19 01:46:57,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541754735] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:46:57,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961037143] [2024-11-19 01:46:57,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:46:57,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:46:57,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:46:57,695 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) [2024-11-19 01:46:57,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 01:46:57,740 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-19 01:46:57,740 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:46:57,741 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 01:46:57,742 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:46:57,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:57,798 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:46:57,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:46:57,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961037143] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:46:57,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:46:57,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-19 01:46:57,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446570833] [2024-11-19 01:46:57,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:46:57,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:46:57,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:46:57,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:46:57,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:46:57,825 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-19 01:46:57,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 1068 transitions, 23887 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:46:57,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:46:57,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-19 01:46:57,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:01,512 INFO L124 PetriNetUnfolderBase]: 6349/11569 cut-off events. [2024-11-19 01:47:01,512 INFO L125 PetriNetUnfolderBase]: For 215553/215553 co-relation queries the response was YES. [2024-11-19 01:47:01,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97224 conditions, 11569 events. 6349/11569 cut-off events. For 215553/215553 co-relation queries the response was YES. Maximal size of possible extension queue 793. Compared 92031 event pairs, 475 based on Foata normal form. 146/11714 useless extension candidates. Maximal degree in co-relation 92683. Up to 4834 conditions per place. [2024-11-19 01:47:01,611 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 821 selfloop transitions, 738 changer transitions 0/1562 dead transitions. [2024-11-19 01:47:01,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 1562 transitions, 36080 flow [2024-11-19 01:47:01,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 01:47:01,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-19 01:47:01,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 163 transitions. [2024-11-19 01:47:01,613 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-11-19 01:47:01,613 INFO L175 Difference]: Start difference. First operand has 191 places, 1068 transitions, 23887 flow. Second operand 14 states and 163 transitions. [2024-11-19 01:47:01,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 1562 transitions, 36080 flow [2024-11-19 01:47:03,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 1562 transitions, 34950 flow, removed 556 selfloop flow, removed 5 redundant places. [2024-11-19 01:47:03,290 INFO L231 Difference]: Finished difference. Result has 207 places, 1260 transitions, 30376 flow [2024-11-19 01:47:03,291 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=22885, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1068, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=555, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=30376, PETRI_PLACES=207, PETRI_TRANSITIONS=1260} [2024-11-19 01:47:03,291 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 186 predicate places. [2024-11-19 01:47:03,291 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 1260 transitions, 30376 flow [2024-11-19 01:47:03,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:03,292 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:03,292 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:47:03,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-19 01:47:03,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-19 01:47:03,493 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:03,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:03,493 INFO L85 PathProgramCache]: Analyzing trace with hash 759064235, now seen corresponding path program 7 times [2024-11-19 01:47:03,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:03,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78306010] [2024-11-19 01:47:03,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:47:03,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:47:03,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:47:03,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:03,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78306010] [2024-11-19 01:47:03,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78306010] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:47:03,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922111091] [2024-11-19 01:47:03,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:47:03,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:47:03,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:47:03,537 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:47:03,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 01:47:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:47:03,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 01:47:03,578 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:47:03,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:47:03,635 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:47:03,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:47:03,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922111091] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:47:03,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:47:03,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2024-11-19 01:47:03,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311357400] [2024-11-19 01:47:03,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:47:03,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 01:47:03,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:03,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 01:47:03,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-19 01:47:03,658 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-19 01:47:03,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 1260 transitions, 30376 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:03,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:03,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-19 01:47:03,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:07,799 INFO L124 PetriNetUnfolderBase]: 6801/12307 cut-off events. [2024-11-19 01:47:07,799 INFO L125 PetriNetUnfolderBase]: For 290144/290147 co-relation queries the response was YES. [2024-11-19 01:47:07,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114091 conditions, 12307 events. 6801/12307 cut-off events. For 290144/290147 co-relation queries the response was YES. Maximal size of possible extension queue 869. Compared 98986 event pairs, 54 based on Foata normal form. 66/12371 useless extension candidates. Maximal degree in co-relation 110470. Up to 3508 conditions per place. [2024-11-19 01:47:08,028 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 1192 selfloop transitions, 578 changer transitions 0/1773 dead transitions. [2024-11-19 01:47:08,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 1773 transitions, 42082 flow [2024-11-19 01:47:08,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-19 01:47:08,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-19 01:47:08,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 167 transitions. [2024-11-19 01:47:08,029 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5566666666666666 [2024-11-19 01:47:08,029 INFO L175 Difference]: Start difference. First operand has 207 places, 1260 transitions, 30376 flow. Second operand 15 states and 167 transitions. [2024-11-19 01:47:08,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 1773 transitions, 42082 flow [2024-11-19 01:47:10,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 1773 transitions, 41803 flow, removed 138 selfloop flow, removed 1 redundant places. [2024-11-19 01:47:10,053 INFO L231 Difference]: Finished difference. Result has 222 places, 1341 transitions, 33563 flow [2024-11-19 01:47:10,054 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=29726, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=487, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=754, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=33563, PETRI_PLACES=222, PETRI_TRANSITIONS=1341} [2024-11-19 01:47:10,054 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 201 predicate places. [2024-11-19 01:47:10,054 INFO L471 AbstractCegarLoop]: Abstraction has has 222 places, 1341 transitions, 33563 flow [2024-11-19 01:47:10,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:10,055 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:10,055 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:47:10,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-19 01:47:10,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-19 01:47:10,255 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:10,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:10,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1338616304, now seen corresponding path program 8 times [2024-11-19 01:47:10,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:10,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223741365] [2024-11-19 01:47:10,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:47:10,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:10,266 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:47:10,266 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:47:10,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:10,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223741365] [2024-11-19 01:47:10,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223741365] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:47:10,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956420032] [2024-11-19 01:47:10,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:47:10,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:47:10,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:47:10,554 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:47:10,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 01:47:10,610 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:47:10,611 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:10,612 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 01:47:10,613 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:47:15,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:47:15,379 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:47:15,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:47:15,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956420032] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:47:15,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:47:15,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2024-11-19 01:47:15,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560518644] [2024-11-19 01:47:15,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:47:15,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 01:47:15,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:15,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 01:47:15,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=234, Unknown=1, NotChecked=0, Total=306 [2024-11-19 01:47:15,643 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-19 01:47:15,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 1341 transitions, 33563 flow. Second operand has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:15,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:15,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-19 01:47:15,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:26,407 WARN L286 SmtUtils]: Spent 6.14s on a formula simplification. DAG size of input: 34 DAG size of output: 19 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-19 01:47:32,658 INFO L124 PetriNetUnfolderBase]: 7841/14128 cut-off events. [2024-11-19 01:47:32,659 INFO L125 PetriNetUnfolderBase]: For 373472/373472 co-relation queries the response was YES. [2024-11-19 01:47:32,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138247 conditions, 14128 events. 7841/14128 cut-off events. For 373472/373472 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 115058 event pairs, 550 based on Foata normal form. 18/14145 useless extension candidates. Maximal degree in co-relation 133563. Up to 6750 conditions per place. [2024-11-19 01:47:32,793 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 606 selfloop transitions, 1180 changer transitions 23/1812 dead transitions. [2024-11-19 01:47:32,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 1812 transitions, 48610 flow [2024-11-19 01:47:32,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-19 01:47:32,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-19 01:47:32,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 286 transitions. [2024-11-19 01:47:32,794 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.572 [2024-11-19 01:47:32,794 INFO L175 Difference]: Start difference. First operand has 222 places, 1341 transitions, 33563 flow. Second operand 25 states and 286 transitions. [2024-11-19 01:47:32,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 1812 transitions, 48610 flow [2024-11-19 01:47:35,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 1812 transitions, 47789 flow, removed 130 selfloop flow, removed 5 redundant places. [2024-11-19 01:47:35,598 INFO L231 Difference]: Finished difference. Result has 252 places, 1675 transitions, 47125 flow [2024-11-19 01:47:35,599 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=33098, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=878, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=47125, PETRI_PLACES=252, PETRI_TRANSITIONS=1675} [2024-11-19 01:47:35,599 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 231 predicate places. [2024-11-19 01:47:35,599 INFO L471 AbstractCegarLoop]: Abstraction has has 252 places, 1675 transitions, 47125 flow [2024-11-19 01:47:35,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:35,599 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:47:35,599 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:47:35,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-19 01:47:35,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-19 01:47:35,800 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:47:35,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:47:35,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1075935858, now seen corresponding path program 9 times [2024-11-19 01:47:35,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:47:35,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760885040] [2024-11-19 01:47:35,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:47:35,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:47:35,815 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 01:47:35,815 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:47:36,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:47:36,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760885040] [2024-11-19 01:47:36,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760885040] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:47:36,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074964948] [2024-11-19 01:47:36,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:47:36,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:47:36,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:47:36,088 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:47:36,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 01:47:36,142 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 01:47:36,142 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:47:36,143 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 01:47:36,144 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:47:40,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:47:40,478 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:47:40,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:47:40,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074964948] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:47:40,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:47:40,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2024-11-19 01:47:40,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363446019] [2024-11-19 01:47:40,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:47:40,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 01:47:40,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:47:40,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 01:47:40,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=241, Unknown=1, NotChecked=0, Total=306 [2024-11-19 01:47:40,773 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-19 01:47:40,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 1675 transitions, 47125 flow. Second operand has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:47:40,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:47:40,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-19 01:47:40,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:47:46,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-19 01:47:50,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-19 01:47:58,273 INFO L124 PetriNetUnfolderBase]: 9287/16683 cut-off events. [2024-11-19 01:47:58,273 INFO L125 PetriNetUnfolderBase]: For 506249/506252 co-relation queries the response was YES. [2024-11-19 01:47:58,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175229 conditions, 16683 events. 9287/16683 cut-off events. For 506249/506252 co-relation queries the response was YES. Maximal size of possible extension queue 1216. Compared 139276 event pairs, 719 based on Foata normal form. 22/16703 useless extension candidates. Maximal degree in co-relation 172892. Up to 8052 conditions per place. [2024-11-19 01:47:58,448 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 701 selfloop transitions, 1533 changer transitions 29/2266 dead transitions. [2024-11-19 01:47:58,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 2266 transitions, 68422 flow [2024-11-19 01:47:58,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-19 01:47:58,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-19 01:47:58,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 304 transitions. [2024-11-19 01:47:58,450 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.562962962962963 [2024-11-19 01:47:58,450 INFO L175 Difference]: Start difference. First operand has 252 places, 1675 transitions, 47125 flow. Second operand 27 states and 304 transitions. [2024-11-19 01:47:58,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 2266 transitions, 68422 flow [2024-11-19 01:48:03,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 2266 transitions, 65089 flow, removed 1594 selfloop flow, removed 5 redundant places. [2024-11-19 01:48:03,453 INFO L231 Difference]: Finished difference. Result has 286 places, 2121 transitions, 62658 flow [2024-11-19 01:48:03,454 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=44959, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=62658, PETRI_PLACES=286, PETRI_TRANSITIONS=2121} [2024-11-19 01:48:03,455 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 265 predicate places. [2024-11-19 01:48:03,455 INFO L471 AbstractCegarLoop]: Abstraction has has 286 places, 2121 transitions, 62658 flow [2024-11-19 01:48:03,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:48:03,455 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:48:03,455 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:48:03,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-19 01:48:03,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-19 01:48:03,656 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:48:03,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:48:03,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1024577616, now seen corresponding path program 10 times [2024-11-19 01:48:03,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:48:03,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660491250] [2024-11-19 01:48:03,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:48:03,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:48:03,661 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:48:03,661 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:48:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:48:03,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:48:03,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660491250] [2024-11-19 01:48:03,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660491250] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:48:03,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024701456] [2024-11-19 01:48:03,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:48:03,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:48:03,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:48:03,685 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:48:03,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 01:48:03,721 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:48:03,721 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:48:03,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-19 01:48:03,722 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:48:03,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:48:03,739 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:48:03,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 01:48:03,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024701456] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:48:03,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:48:03,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2024-11-19 01:48:03,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712598371] [2024-11-19 01:48:03,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:48:03,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 01:48:03,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:48:03,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 01:48:03,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 01:48:03,757 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-19 01:48:03,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 2121 transitions, 62658 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:48:03,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:48:03,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-19 01:48:03,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:48:09,998 INFO L124 PetriNetUnfolderBase]: 6436/11522 cut-off events. [2024-11-19 01:48:09,998 INFO L125 PetriNetUnfolderBase]: For 389450/389450 co-relation queries the response was YES. [2024-11-19 01:48:10,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119703 conditions, 11522 events. 6436/11522 cut-off events. For 389450/389450 co-relation queries the response was YES. Maximal size of possible extension queue 904. Compared 92002 event pairs, 363 based on Foata normal form. 742/12263 useless extension candidates. Maximal degree in co-relation 119594. Up to 7013 conditions per place. [2024-11-19 01:48:10,124 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 1270 selfloop transitions, 392 changer transitions 2/1667 dead transitions. [2024-11-19 01:48:10,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 1667 transitions, 51751 flow [2024-11-19 01:48:10,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:48:10,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:48:10,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-11-19 01:48:10,126 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-11-19 01:48:10,126 INFO L175 Difference]: Start difference. First operand has 286 places, 2121 transitions, 62658 flow. Second operand 5 states and 64 transitions. [2024-11-19 01:48:10,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 1667 transitions, 51751 flow [2024-11-19 01:48:13,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 1667 transitions, 47789 flow, removed 1918 selfloop flow, removed 17 redundant places. [2024-11-19 01:48:13,569 INFO L231 Difference]: Finished difference. Result has 268 places, 1492 transitions, 41933 flow [2024-11-19 01:48:13,571 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=37035, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1007, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=41933, PETRI_PLACES=268, PETRI_TRANSITIONS=1492} [2024-11-19 01:48:13,571 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 247 predicate places. [2024-11-19 01:48:13,571 INFO L471 AbstractCegarLoop]: Abstraction has has 268 places, 1492 transitions, 41933 flow [2024-11-19 01:48:13,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:48:13,572 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:48:13,572 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:48:13,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-19 01:48:13,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:48:13,776 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:48:13,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:48:13,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1177295995, now seen corresponding path program 11 times [2024-11-19 01:48:13,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:48:13,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247748593] [2024-11-19 01:48:13,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:48:13,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:48:13,785 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-19 01:48:13,786 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:48:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:48:13,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:48:13,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247748593] [2024-11-19 01:48:13,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247748593] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:48:13,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415159916] [2024-11-19 01:48:13,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:48:13,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:48:13,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:48:13,837 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:48:13,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 01:48:13,894 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-19 01:48:13,894 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:48:13,896 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 01:48:13,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:48:13,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:48:13,965 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:48:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:48:13,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415159916] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:48:13,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:48:13,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-19 01:48:13,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082274101] [2024-11-19 01:48:13,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:48:14,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:48:14,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:48:14,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:48:14,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:48:14,000 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2024-11-19 01:48:14,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 1492 transitions, 41933 flow. Second operand has 10 states, 10 states have (on average 8.2) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:48:14,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:48:14,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2024-11-19 01:48:14,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand