./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-figure1.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/popl20-figure1.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 facd7612076746f2d167aef7303c13ba7b66236eba7a99773acf1e3861338848 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 01:50:06,612 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 01:50:06,676 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 01:50:06,682 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 01:50:06,682 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 01:50:06,712 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 01:50:06,712 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 01:50:06,713 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 01:50:06,714 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 01:50:06,716 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 01:50:06,717 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 01:50:06,717 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 01:50:06,717 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 01:50:06,719 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 01:50:06,719 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 01:50:06,720 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 01:50:06,720 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 01:50:06,720 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 01:50:06,721 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 01:50:06,721 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 01:50:06,721 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 01:50:06,721 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 01:50:06,725 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 01:50:06,725 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 01:50:06,725 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 01:50:06,725 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 01:50:06,726 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 01:50:06,726 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 01:50:06,726 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 01:50:06,726 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 01:50:06,726 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 01:50:06,726 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 01:50:06,727 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:50:06,727 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 01:50:06,727 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 01:50:06,727 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 01:50:06,727 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 01:50:06,728 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 01:50:06,728 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 01:50:06,729 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 01:50:06,730 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 01:50:06,730 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 01:50:06,731 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> facd7612076746f2d167aef7303c13ba7b66236eba7a99773acf1e3861338848 [2024-11-19 01:50:07,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 01:50:07,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 01:50:07,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 01:50:07,035 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 01:50:07,035 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 01:50:07,037 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2024-11-19 01:50:08,482 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 01:50:08,674 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 01:50:08,675 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2024-11-19 01:50:08,683 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f674510f7/495a1248d2074d1d8e10cf181d97c51b/FLAGc56fd8ee1 [2024-11-19 01:50:09,055 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f674510f7/495a1248d2074d1d8e10cf181d97c51b [2024-11-19 01:50:09,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 01:50:09,058 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 01:50:09,060 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 01:50:09,060 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 01:50:09,065 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 01:50:09,066 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:50:09" (1/1) ... [2024-11-19 01:50:09,067 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@674d674a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:09, skipping insertion in model container [2024-11-19 01:50:09,067 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:50:09" (1/1) ... [2024-11-19 01:50:09,088 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 01:50:09,317 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/popl20-figure1.wvr.c[1825,1838] [2024-11-19 01:50:09,322 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:50:09,330 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 01:50:09,351 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/popl20-figure1.wvr.c[1825,1838] [2024-11-19 01:50:09,353 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:50:09,376 INFO L204 MainTranslator]: Completed translation [2024-11-19 01:50:09,376 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:09 WrapperNode [2024-11-19 01:50:09,377 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 01:50:09,378 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 01:50:09,379 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 01:50:09,379 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 01:50:09,387 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:09" (1/1) ... [2024-11-19 01:50:09,396 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:09" (1/1) ... [2024-11-19 01:50:09,415 INFO L138 Inliner]: procedures = 18, calls = 10, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2024-11-19 01:50:09,416 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 01:50:09,417 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 01:50:09,417 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 01:50:09,417 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 01:50:09,427 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:09" (1/1) ... [2024-11-19 01:50:09,428 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:09" (1/1) ... [2024-11-19 01:50:09,429 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:09" (1/1) ... [2024-11-19 01:50:09,448 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 01:50:09,450 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:09" (1/1) ... [2024-11-19 01:50:09,451 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:09" (1/1) ... [2024-11-19 01:50:09,457 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:09" (1/1) ... [2024-11-19 01:50:09,462 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:09" (1/1) ... [2024-11-19 01:50:09,463 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:09" (1/1) ... [2024-11-19 01:50:09,464 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:09" (1/1) ... [2024-11-19 01:50:09,470 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 01:50:09,471 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 01:50:09,473 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 01:50:09,473 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 01:50:09,474 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:09" (1/1) ... [2024-11-19 01:50:09,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:50:09,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:50:09,511 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 01:50:09,517 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 01:50:09,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 01:50:09,569 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 01:50:09,569 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 01:50:09,570 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 01:50:09,570 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 01:50:09,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 01:50:09,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 01:50:09,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 01:50:09,573 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 01:50:09,678 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 01:50:09,680 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 01:50:09,846 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 01:50:09,846 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 01:50:09,966 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 01:50:09,966 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-19 01:50:09,966 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:50:09 BoogieIcfgContainer [2024-11-19 01:50:09,967 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 01:50:09,970 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 01:50:09,971 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 01:50:09,974 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 01:50:09,975 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:50:09" (1/3) ... [2024-11-19 01:50:09,976 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5333901d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:50:09, skipping insertion in model container [2024-11-19 01:50:09,976 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:50:09" (2/3) ... [2024-11-19 01:50:09,976 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5333901d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:50:09, skipping insertion in model container [2024-11-19 01:50:09,977 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:50:09" (3/3) ... [2024-11-19 01:50:09,979 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2024-11-19 01:50:09,993 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 01:50:09,993 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 01:50:09,993 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 01:50:10,039 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-19 01:50:10,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 22 transitions, 58 flow [2024-11-19 01:50:10,111 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-11-19 01:50:10,112 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 01:50:10,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 2/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-11-19 01:50:10,115 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 22 transitions, 58 flow [2024-11-19 01:50:10,118 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 19 transitions, 50 flow [2024-11-19 01:50:10,128 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 01:50:10,135 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;@5d37ca3f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 01:50:10,135 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-19 01:50:10,146 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 01:50:10,147 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2024-11-19 01:50:10,147 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 01:50:10,147 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:10,148 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:10,149 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 01:50:10,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:10,154 INFO L85 PathProgramCache]: Analyzing trace with hash 865412045, now seen corresponding path program 1 times [2024-11-19 01:50:10,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:10,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461387612] [2024-11-19 01:50:10,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:50:10,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:10,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:50:10,393 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 01:50:10,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:10,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461387612] [2024-11-19 01:50:10,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461387612] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:50:10,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:50:10,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 01:50:10,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130884656] [2024-11-19 01:50:10,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:50:10,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 01:50:10,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:10,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 01:50:10,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 01:50:10,446 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-11-19 01:50:10,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 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 01:50:10,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:10,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-11-19 01:50:10,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:10,567 INFO L124 PetriNetUnfolderBase]: 86/168 cut-off events. [2024-11-19 01:50:10,567 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-11-19 01:50:10,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 168 events. 86/168 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 506 event pairs, 32 based on Foata normal form. 1/161 useless extension candidates. Maximal degree in co-relation 297. Up to 108 conditions per place. [2024-11-19 01:50:10,573 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 21 selfloop transitions, 2 changer transitions 3/28 dead transitions. [2024-11-19 01:50:10,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 28 transitions, 129 flow [2024-11-19 01:50:10,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 01:50:10,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 01:50:10,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 40 transitions. [2024-11-19 01:50:10,586 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-11-19 01:50:10,588 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 50 flow. Second operand 3 states and 40 transitions. [2024-11-19 01:50:10,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 28 transitions, 129 flow [2024-11-19 01:50:10,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 28 transitions, 115 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 01:50:10,596 INFO L231 Difference]: Finished difference. Result has 23 places, 20 transitions, 56 flow [2024-11-19 01:50:10,599 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=23, PETRI_TRANSITIONS=20} [2024-11-19 01:50:10,606 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, -1 predicate places. [2024-11-19 01:50:10,606 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 20 transitions, 56 flow [2024-11-19 01:50:10,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 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 01:50:10,608 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:10,608 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:10,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 01:50:10,608 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 01:50:10,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:10,611 INFO L85 PathProgramCache]: Analyzing trace with hash 528976037, now seen corresponding path program 1 times [2024-11-19 01:50:10,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:10,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094437282] [2024-11-19 01:50:10,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:50:10,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:10,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:50:10,789 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 01:50:10,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:10,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094437282] [2024-11-19 01:50:10,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094437282] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:50:10,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:50:10,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 01:50:10,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686935333] [2024-11-19 01:50:10,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:50:10,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 01:50:10,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:10,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 01:50:10,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-19 01:50:10,794 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-19 01:50:10,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 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 01:50:10,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:10,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-19 01:50:10,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:11,001 INFO L124 PetriNetUnfolderBase]: 151/272 cut-off events. [2024-11-19 01:50:11,001 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-19 01:50:11,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 272 events. 151/272 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 990 event pairs, 59 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 195. Up to 187 conditions per place. [2024-11-19 01:50:11,004 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 33 selfloop transitions, 7 changer transitions 3/44 dead transitions. [2024-11-19 01:50:11,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 44 transitions, 201 flow [2024-11-19 01:50:11,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:50:11,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:50:11,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2024-11-19 01:50:11,007 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2024-11-19 01:50:11,007 INFO L175 Difference]: Start difference. First operand has 23 places, 20 transitions, 56 flow. Second operand 5 states and 59 transitions. [2024-11-19 01:50:11,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 44 transitions, 201 flow [2024-11-19 01:50:11,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 44 transitions, 197 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 01:50:11,010 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 106 flow [2024-11-19 01:50:11,011 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2024-11-19 01:50:11,012 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2024-11-19 01:50:11,013 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 106 flow [2024-11-19 01:50:11,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 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 01:50:11,013 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:11,013 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:11,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 01:50:11,014 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 01:50:11,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:11,016 INFO L85 PathProgramCache]: Analyzing trace with hash 882982957, now seen corresponding path program 2 times [2024-11-19 01:50:11,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:11,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457910535] [2024-11-19 01:50:11,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:50:11,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:11,050 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:50:11,050 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:11,183 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 01:50:11,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:11,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457910535] [2024-11-19 01:50:11,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457910535] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:50:11,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:50:11,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 01:50:11,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494157608] [2024-11-19 01:50:11,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:50:11,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 01:50:11,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:11,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 01:50:11,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-19 01:50:11,195 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-19 01:50:11,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 106 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 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 01:50:11,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:11,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-19 01:50:11,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:11,366 INFO L124 PetriNetUnfolderBase]: 185/329 cut-off events. [2024-11-19 01:50:11,367 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-11-19 01:50:11,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 971 conditions, 329 events. 185/329 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1234 event pairs, 4 based on Foata normal form. 13/342 useless extension candidates. Maximal degree in co-relation 435. Up to 148 conditions per place. [2024-11-19 01:50:11,373 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 48 selfloop transitions, 10 changer transitions 1/60 dead transitions. [2024-11-19 01:50:11,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 60 transitions, 345 flow [2024-11-19 01:50:11,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 01:50:11,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 01:50:11,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2024-11-19 01:50:11,378 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-19 01:50:11,378 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 106 flow. Second operand 7 states and 77 transitions. [2024-11-19 01:50:11,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 60 transitions, 345 flow [2024-11-19 01:50:11,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 60 transitions, 343 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-19 01:50:11,383 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 186 flow [2024-11-19 01:50:11,384 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=186, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2024-11-19 01:50:11,384 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 16 predicate places. [2024-11-19 01:50:11,385 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 186 flow [2024-11-19 01:50:11,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 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 01:50:11,385 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:11,385 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:11,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 01:50:11,386 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 01:50:11,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:11,387 INFO L85 PathProgramCache]: Analyzing trace with hash 2138432043, now seen corresponding path program 3 times [2024-11-19 01:50:11,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:11,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807734508] [2024-11-19 01:50:11,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:50:11,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:11,400 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 01:50:11,400 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:11,465 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 01:50:11,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:11,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807734508] [2024-11-19 01:50:11,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807734508] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:50:11,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:50:11,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 01:50:11,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108174942] [2024-11-19 01:50:11,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:50:11,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 01:50:11,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:11,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 01:50:11,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 01:50:11,471 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-19 01:50:11,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 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 01:50:11,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:11,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-19 01:50:11,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:11,597 INFO L124 PetriNetUnfolderBase]: 248/441 cut-off events. [2024-11-19 01:50:11,598 INFO L125 PetriNetUnfolderBase]: For 710/710 co-relation queries the response was YES. [2024-11-19 01:50:11,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1528 conditions, 441 events. 248/441 cut-off events. For 710/710 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1627 event pairs, 86 based on Foata normal form. 2/443 useless extension candidates. Maximal degree in co-relation 991. Up to 194 conditions per place. [2024-11-19 01:50:11,602 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 46 selfloop transitions, 10 changer transitions 2/59 dead transitions. [2024-11-19 01:50:11,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 59 transitions, 439 flow [2024-11-19 01:50:11,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:50:11,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:50:11,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 55 transitions. [2024-11-19 01:50:11,604 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-19 01:50:11,604 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 186 flow. Second operand 5 states and 55 transitions. [2024-11-19 01:50:11,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 59 transitions, 439 flow [2024-11-19 01:50:11,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 59 transitions, 436 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 01:50:11,610 INFO L231 Difference]: Finished difference. Result has 46 places, 34 transitions, 237 flow [2024-11-19 01:50:11,610 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=46, PETRI_TRANSITIONS=34} [2024-11-19 01:50:11,611 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 22 predicate places. [2024-11-19 01:50:11,611 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 34 transitions, 237 flow [2024-11-19 01:50:11,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 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 01:50:11,611 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:11,612 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:11,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 01:50:11,612 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 01:50:11,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:11,613 INFO L85 PathProgramCache]: Analyzing trace with hash -41786863, now seen corresponding path program 4 times [2024-11-19 01:50:11,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:11,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775727691] [2024-11-19 01:50:11,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:50:11,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:11,627 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:50:11,628 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:11,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:11,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:11,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775727691] [2024-11-19 01:50:11,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775727691] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:50:11,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648093868] [2024-11-19 01:50:11,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:50:11,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:11,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:50:11,680 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 01:50:11,681 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 01:50:11,741 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:50:11,741 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:11,743 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-19 01:50:11,747 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:50:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:11,869 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:50:11,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:11,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648093868] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:50:11,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:50:11,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-11-19 01:50:11,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108253315] [2024-11-19 01:50:11,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:50:11,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 01:50:11,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:11,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 01:50:11,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-19 01:50:11,917 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-19 01:50:11,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 34 transitions, 237 flow. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 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 01:50:11,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:11,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-19 01:50:11,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:12,115 INFO L124 PetriNetUnfolderBase]: 319/560 cut-off events. [2024-11-19 01:50:12,115 INFO L125 PetriNetUnfolderBase]: For 1347/1347 co-relation queries the response was YES. [2024-11-19 01:50:12,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2067 conditions, 560 events. 319/560 cut-off events. For 1347/1347 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2243 event pairs, 46 based on Foata normal form. 13/573 useless extension candidates. Maximal degree in co-relation 1917. Up to 169 conditions per place. [2024-11-19 01:50:12,120 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 54 selfloop transitions, 27 changer transitions 1/83 dead transitions. [2024-11-19 01:50:12,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 83 transitions, 662 flow [2024-11-19 01:50:12,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 01:50:12,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 01:50:12,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 89 transitions. [2024-11-19 01:50:12,122 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-11-19 01:50:12,123 INFO L175 Difference]: Start difference. First operand has 46 places, 34 transitions, 237 flow. Second operand 9 states and 89 transitions. [2024-11-19 01:50:12,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 83 transitions, 662 flow [2024-11-19 01:50:12,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 83 transitions, 635 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-11-19 01:50:12,134 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 445 flow [2024-11-19 01:50:12,135 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=445, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-11-19 01:50:12,136 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 32 predicate places. [2024-11-19 01:50:12,138 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 445 flow [2024-11-19 01:50:12,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 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 01:50:12,138 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:12,138 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:12,157 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 01:50:12,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:12,340 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 01:50:12,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:12,341 INFO L85 PathProgramCache]: Analyzing trace with hash 76889327, now seen corresponding path program 5 times [2024-11-19 01:50:12,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:12,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566011477] [2024-11-19 01:50:12,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:50:12,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:12,356 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:50:12,356 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:12,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:12,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:12,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566011477] [2024-11-19 01:50:12,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566011477] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:50:12,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133698004] [2024-11-19 01:50:12,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:50:12,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:12,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:50:12,438 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 01:50:12,440 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 01:50:12,494 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:50:12,494 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:12,495 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-19 01:50:12,496 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:50:12,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:12,565 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:50:12,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:12,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133698004] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:50:12,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:50:12,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-19 01:50:12,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301133702] [2024-11-19 01:50:12,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:50:12,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:50:12,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:12,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:50:12,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:50:12,613 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-19 01:50:12,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 445 flow. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 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 01:50:12,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:12,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-19 01:50:12,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:12,795 INFO L124 PetriNetUnfolderBase]: 305/544 cut-off events. [2024-11-19 01:50:12,795 INFO L125 PetriNetUnfolderBase]: For 2189/2189 co-relation queries the response was YES. [2024-11-19 01:50:12,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2258 conditions, 544 events. 305/544 cut-off events. For 2189/2189 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2179 event pairs, 73 based on Foata normal form. 13/557 useless extension candidates. Maximal degree in co-relation 1926. Up to 187 conditions per place. [2024-11-19 01:50:12,825 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 58 selfloop transitions, 28 changer transitions 1/88 dead transitions. [2024-11-19 01:50:12,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 88 transitions, 846 flow [2024-11-19 01:50:12,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 01:50:12,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 01:50:12,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 76 transitions. [2024-11-19 01:50:12,827 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4935064935064935 [2024-11-19 01:50:12,828 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 445 flow. Second operand 7 states and 76 transitions. [2024-11-19 01:50:12,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 88 transitions, 846 flow [2024-11-19 01:50:12,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 88 transitions, 772 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-11-19 01:50:12,835 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 551 flow [2024-11-19 01:50:12,836 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=551, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-11-19 01:50:12,836 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 39 predicate places. [2024-11-19 01:50:12,837 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 551 flow [2024-11-19 01:50:12,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 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 01:50:12,837 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:12,837 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:12,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 01:50:13,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-19 01:50:13,042 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 01:50:13,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:13,043 INFO L85 PathProgramCache]: Analyzing trace with hash -548220071, now seen corresponding path program 6 times [2024-11-19 01:50:13,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:13,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131967443] [2024-11-19 01:50:13,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:50:13,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:13,054 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-19 01:50:13,054 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:13,116 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 01:50:13,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:13,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131967443] [2024-11-19 01:50:13,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131967443] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:50:13,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:50:13,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 01:50:13,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287734737] [2024-11-19 01:50:13,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:50:13,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 01:50:13,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:13,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 01:50:13,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 01:50:13,119 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-19 01:50:13,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 551 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 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 01:50:13,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:13,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-19 01:50:13,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:13,261 INFO L124 PetriNetUnfolderBase]: 296/517 cut-off events. [2024-11-19 01:50:13,262 INFO L125 PetriNetUnfolderBase]: For 2306/2306 co-relation queries the response was YES. [2024-11-19 01:50:13,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2224 conditions, 517 events. 296/517 cut-off events. For 2306/2306 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1959 event pairs, 95 based on Foata normal form. 2/519 useless extension candidates. Maximal degree in co-relation 2009. Up to 287 conditions per place. [2024-11-19 01:50:13,266 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 51 selfloop transitions, 18 changer transitions 2/72 dead transitions. [2024-11-19 01:50:13,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 72 transitions, 759 flow [2024-11-19 01:50:13,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:50:13,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:50:13,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2024-11-19 01:50:13,267 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-11-19 01:50:13,267 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 551 flow. Second operand 5 states and 53 transitions. [2024-11-19 01:50:13,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 72 transitions, 759 flow [2024-11-19 01:50:13,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 72 transitions, 711 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-11-19 01:50:13,276 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 558 flow [2024-11-19 01:50:13,276 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=558, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-11-19 01:50:13,277 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 41 predicate places. [2024-11-19 01:50:13,278 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 558 flow [2024-11-19 01:50:13,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 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 01:50:13,278 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:13,278 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:13,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-19 01:50:13,278 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 01:50:13,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:13,279 INFO L85 PathProgramCache]: Analyzing trace with hash 2142389920, now seen corresponding path program 1 times [2024-11-19 01:50:13,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:13,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877918158] [2024-11-19 01:50:13,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:50:13,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:50:13,365 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 01:50:13,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:13,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877918158] [2024-11-19 01:50:13,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877918158] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:50:13,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814483795] [2024-11-19 01:50:13,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:50:13,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:13,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:50:13,372 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 01:50:13,375 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 01:50:13,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:50:13,425 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 01:50:13,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:50:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:13,471 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 01:50:13,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814483795] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:50:13,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 01:50:13,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 5 [2024-11-19 01:50:13,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177412817] [2024-11-19 01:50:13,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:50:13,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 01:50:13,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:13,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 01:50:13,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-19 01:50:13,473 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-11-19 01:50:13,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 558 flow. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 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 01:50:13,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:13,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-11-19 01:50:13,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:13,615 INFO L124 PetriNetUnfolderBase]: 442/815 cut-off events. [2024-11-19 01:50:13,616 INFO L125 PetriNetUnfolderBase]: For 3768/3774 co-relation queries the response was YES. [2024-11-19 01:50:13,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3431 conditions, 815 events. 442/815 cut-off events. For 3768/3774 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3719 event pairs, 70 based on Foata normal form. 12/826 useless extension candidates. Maximal degree in co-relation 2432. Up to 369 conditions per place. [2024-11-19 01:50:13,623 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 93 selfloop transitions, 5 changer transitions 18/123 dead transitions. [2024-11-19 01:50:13,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 123 transitions, 1359 flow [2024-11-19 01:50:13,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 01:50:13,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 01:50:13,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2024-11-19 01:50:13,624 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-11-19 01:50:13,625 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 558 flow. Second operand 4 states and 60 transitions. [2024-11-19 01:50:13,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 123 transitions, 1359 flow [2024-11-19 01:50:13,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 123 transitions, 1323 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-19 01:50:13,637 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 578 flow [2024-11-19 01:50:13,638 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=578, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2024-11-19 01:50:13,638 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 42 predicate places. [2024-11-19 01:50:13,639 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 578 flow [2024-11-19 01:50:13,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 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 01:50:13,639 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:13,639 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:13,656 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 01:50:13,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:13,844 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 01:50:13,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:13,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1592455404, now seen corresponding path program 2 times [2024-11-19 01:50:13,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:13,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580611157] [2024-11-19 01:50:13,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:50:13,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:13,855 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:50:13,855 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:13,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:13,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:13,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580611157] [2024-11-19 01:50:13,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580611157] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:50:13,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360708984] [2024-11-19 01:50:13,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:50:13,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:13,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:50:13,926 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 01:50:13,928 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 01:50:13,981 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:50:13,982 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:13,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 01:50:13,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:50:14,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:14,069 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:50:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:14,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360708984] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:50:14,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:50:14,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-11-19 01:50:14,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385735267] [2024-11-19 01:50:14,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:50:14,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 01:50:14,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:14,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 01:50:14,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-11-19 01:50:14,123 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-19 01:50:14,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 578 flow. Second operand has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 0 states have call successors, (0), 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 01:50:14,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:14,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-19 01:50:14,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:14,786 INFO L124 PetriNetUnfolderBase]: 1036/1715 cut-off events. [2024-11-19 01:50:14,786 INFO L125 PetriNetUnfolderBase]: For 7348/7348 co-relation queries the response was YES. [2024-11-19 01:50:14,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7615 conditions, 1715 events. 1036/1715 cut-off events. For 7348/7348 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7701 event pairs, 44 based on Foata normal form. 56/1771 useless extension candidates. Maximal degree in co-relation 5704. Up to 341 conditions per place. [2024-11-19 01:50:14,799 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 131 selfloop transitions, 92 changer transitions 6/230 dead transitions. [2024-11-19 01:50:14,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 230 transitions, 2163 flow [2024-11-19 01:50:14,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-19 01:50:14,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-19 01:50:14,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 251 transitions. [2024-11-19 01:50:14,801 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4388111888111888 [2024-11-19 01:50:14,801 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 578 flow. Second operand 26 states and 251 transitions. [2024-11-19 01:50:14,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 230 transitions, 2163 flow [2024-11-19 01:50:14,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 230 transitions, 2163 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-19 01:50:14,816 INFO L231 Difference]: Finished difference. Result has 107 places, 119 transitions, 1468 flow [2024-11-19 01:50:14,816 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1468, PETRI_PLACES=107, PETRI_TRANSITIONS=119} [2024-11-19 01:50:14,818 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 83 predicate places. [2024-11-19 01:50:14,818 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 119 transitions, 1468 flow [2024-11-19 01:50:14,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 0 states have call successors, (0), 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 01:50:14,819 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:14,820 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:14,836 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 01:50:15,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:15,020 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 01:50:15,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:15,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1690812916, now seen corresponding path program 3 times [2024-11-19 01:50:15,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:15,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813379941] [2024-11-19 01:50:15,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:50:15,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:15,032 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-19 01:50:15,033 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:15,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:15,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:15,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813379941] [2024-11-19 01:50:15,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813379941] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:50:15,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053705763] [2024-11-19 01:50:15,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:50:15,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:15,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:50:15,104 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 01:50:15,108 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 01:50:15,156 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-19 01:50:15,157 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:15,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 01:50:15,159 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:50:15,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:15,233 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:50:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:15,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053705763] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:50:15,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:50:15,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-19 01:50:15,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116579032] [2024-11-19 01:50:15,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:50:15,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 01:50:15,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:15,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 01:50:15,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-19 01:50:15,288 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-19 01:50:15,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 119 transitions, 1468 flow. Second operand has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 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 01:50:15,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:15,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-19 01:50:15,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:15,845 INFO L124 PetriNetUnfolderBase]: 1418/2336 cut-off events. [2024-11-19 01:50:15,845 INFO L125 PetriNetUnfolderBase]: For 27372/27372 co-relation queries the response was YES. [2024-11-19 01:50:15,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14519 conditions, 2336 events. 1418/2336 cut-off events. For 27372/27372 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 11275 event pairs, 121 based on Foata normal form. 18/2354 useless extension candidates. Maximal degree in co-relation 11674. Up to 508 conditions per place. [2024-11-19 01:50:15,871 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 145 selfloop transitions, 84 changer transitions 3/233 dead transitions. [2024-11-19 01:50:15,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 233 transitions, 3083 flow [2024-11-19 01:50:15,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-19 01:50:15,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-19 01:50:15,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 168 transitions. [2024-11-19 01:50:15,874 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44919786096256686 [2024-11-19 01:50:15,874 INFO L175 Difference]: Start difference. First operand has 107 places, 119 transitions, 1468 flow. Second operand 17 states and 168 transitions. [2024-11-19 01:50:15,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 233 transitions, 3083 flow [2024-11-19 01:50:15,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 233 transitions, 2858 flow, removed 97 selfloop flow, removed 3 redundant places. [2024-11-19 01:50:16,001 INFO L231 Difference]: Finished difference. Result has 124 places, 154 transitions, 1995 flow [2024-11-19 01:50:16,002 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1995, PETRI_PLACES=124, PETRI_TRANSITIONS=154} [2024-11-19 01:50:16,002 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 100 predicate places. [2024-11-19 01:50:16,003 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 154 transitions, 1995 flow [2024-11-19 01:50:16,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 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 01:50:16,003 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:16,007 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:16,027 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 01:50:16,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-19 01:50:16,209 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 01:50:16,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:16,210 INFO L85 PathProgramCache]: Analyzing trace with hash -270032684, now seen corresponding path program 4 times [2024-11-19 01:50:16,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:16,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034712554] [2024-11-19 01:50:16,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:50:16,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:16,221 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:50:16,224 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:16,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:16,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:16,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034712554] [2024-11-19 01:50:16,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034712554] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:50:16,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239907817] [2024-11-19 01:50:16,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:50:16,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:16,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:50:16,285 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 01:50:16,286 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 01:50:16,334 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:50:16,335 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:16,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 01:50:16,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:50:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:16,398 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:50:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:16,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239907817] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:50:16,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:50:16,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2024-11-19 01:50:16,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641747817] [2024-11-19 01:50:16,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:50:16,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 01:50:16,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:16,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 01:50:16,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-19 01:50:16,461 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-19 01:50:16,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 154 transitions, 1995 flow. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 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 01:50:16,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:16,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-19 01:50:16,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:17,069 INFO L124 PetriNetUnfolderBase]: 1715/2831 cut-off events. [2024-11-19 01:50:17,070 INFO L125 PetriNetUnfolderBase]: For 43676/43676 co-relation queries the response was YES. [2024-11-19 01:50:17,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18351 conditions, 2831 events. 1715/2831 cut-off events. For 43676/43676 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14283 event pairs, 98 based on Foata normal form. 30/2861 useless extension candidates. Maximal degree in co-relation 15092. Up to 798 conditions per place. [2024-11-19 01:50:17,110 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 133 selfloop transitions, 132 changer transitions 24/290 dead transitions. [2024-11-19 01:50:17,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 290 transitions, 4007 flow [2024-11-19 01:50:17,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-19 01:50:17,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-19 01:50:17,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 144 transitions. [2024-11-19 01:50:17,111 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-11-19 01:50:17,111 INFO L175 Difference]: Start difference. First operand has 124 places, 154 transitions, 1995 flow. Second operand 15 states and 144 transitions. [2024-11-19 01:50:17,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 290 transitions, 4007 flow [2024-11-19 01:50:17,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 290 transitions, 3519 flow, removed 231 selfloop flow, removed 3 redundant places. [2024-11-19 01:50:17,233 INFO L231 Difference]: Finished difference. Result has 142 places, 201 transitions, 2754 flow [2024-11-19 01:50:17,233 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2754, PETRI_PLACES=142, PETRI_TRANSITIONS=201} [2024-11-19 01:50:17,234 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 118 predicate places. [2024-11-19 01:50:17,234 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 201 transitions, 2754 flow [2024-11-19 01:50:17,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 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 01:50:17,234 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:17,235 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:17,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-19 01:50:17,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:17,439 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 01:50:17,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:17,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1993048508, now seen corresponding path program 5 times [2024-11-19 01:50:17,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:17,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816705860] [2024-11-19 01:50:17,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:50:17,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:17,448 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-19 01:50:17,448 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:17,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:17,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:17,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816705860] [2024-11-19 01:50:17,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816705860] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:50:17,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156404417] [2024-11-19 01:50:17,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:50:17,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:17,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:50:17,512 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 01:50:17,513 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 01:50:17,563 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-19 01:50:17,563 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:17,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 01:50:17,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:50:17,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:17,624 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:50:17,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:17,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156404417] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:50:17,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:50:17,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2024-11-19 01:50:17,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149201788] [2024-11-19 01:50:17,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:50:17,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 01:50:17,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:17,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 01:50:17,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-19 01:50:17,660 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-19 01:50:17,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 201 transitions, 2754 flow. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 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 01:50:17,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:17,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-19 01:50:17,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:18,587 INFO L124 PetriNetUnfolderBase]: 2099/3446 cut-off events. [2024-11-19 01:50:18,588 INFO L125 PetriNetUnfolderBase]: For 60728/60728 co-relation queries the response was YES. [2024-11-19 01:50:18,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22862 conditions, 3446 events. 2099/3446 cut-off events. For 60728/60728 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18132 event pairs, 95 based on Foata normal form. 52/3498 useless extension candidates. Maximal degree in co-relation 21790. Up to 712 conditions per place. [2024-11-19 01:50:18,620 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 166 selfloop transitions, 192 changer transitions 2/361 dead transitions. [2024-11-19 01:50:18,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 361 transitions, 5230 flow [2024-11-19 01:50:18,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-19 01:50:18,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-19 01:50:18,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 226 transitions. [2024-11-19 01:50:18,623 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44664031620553357 [2024-11-19 01:50:18,623 INFO L175 Difference]: Start difference. First operand has 142 places, 201 transitions, 2754 flow. Second operand 23 states and 226 transitions. [2024-11-19 01:50:18,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 361 transitions, 5230 flow [2024-11-19 01:50:18,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 361 transitions, 5055 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-11-19 01:50:18,762 INFO L231 Difference]: Finished difference. Result has 174 places, 254 transitions, 4209 flow [2024-11-19 01:50:18,763 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2603, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4209, PETRI_PLACES=174, PETRI_TRANSITIONS=254} [2024-11-19 01:50:18,763 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 150 predicate places. [2024-11-19 01:50:18,763 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 254 transitions, 4209 flow [2024-11-19 01:50:18,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 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 01:50:18,764 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:18,765 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:18,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-19 01:50:18,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:18,966 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 01:50:18,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:18,966 INFO L85 PathProgramCache]: Analyzing trace with hash 2020552142, now seen corresponding path program 6 times [2024-11-19 01:50:18,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:18,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133970584] [2024-11-19 01:50:18,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:50:18,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:18,977 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-19 01:50:18,977 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:19,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:19,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133970584] [2024-11-19 01:50:19,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133970584] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:50:19,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992297038] [2024-11-19 01:50:19,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:50:19,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:19,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:50:19,034 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 01:50:19,036 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 01:50:19,085 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-19 01:50:19,085 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:19,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 01:50:19,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:50:19,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:19,155 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:50:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:19,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992297038] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:50:19,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:50:19,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-19 01:50:19,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374198891] [2024-11-19 01:50:19,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:50:19,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 01:50:19,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:19,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 01:50:19,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-19 01:50:19,211 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-19 01:50:19,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 254 transitions, 4209 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 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 01:50:19,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:19,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-19 01:50:19,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:20,337 INFO L124 PetriNetUnfolderBase]: 2529/4185 cut-off events. [2024-11-19 01:50:20,337 INFO L125 PetriNetUnfolderBase]: For 112866/112866 co-relation queries the response was YES. [2024-11-19 01:50:20,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32076 conditions, 4185 events. 2529/4185 cut-off events. For 112866/112866 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 23266 event pairs, 106 based on Foata normal form. 40/4225 useless extension candidates. Maximal degree in co-relation 30340. Up to 1312 conditions per place. [2024-11-19 01:50:20,375 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 191 selfloop transitions, 214 changer transitions 2/408 dead transitions. [2024-11-19 01:50:20,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 408 transitions, 7121 flow [2024-11-19 01:50:20,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 01:50:20,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-19 01:50:20,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 157 transitions. [2024-11-19 01:50:20,377 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-11-19 01:50:20,377 INFO L175 Difference]: Start difference. First operand has 174 places, 254 transitions, 4209 flow. Second operand 16 states and 157 transitions. [2024-11-19 01:50:20,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 408 transitions, 7121 flow [2024-11-19 01:50:20,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 408 transitions, 6741 flow, removed 146 selfloop flow, removed 6 redundant places. [2024-11-19 01:50:20,678 INFO L231 Difference]: Finished difference. Result has 190 places, 312 transitions, 5783 flow [2024-11-19 01:50:20,678 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3901, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5783, PETRI_PLACES=190, PETRI_TRANSITIONS=312} [2024-11-19 01:50:20,679 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 166 predicate places. [2024-11-19 01:50:20,679 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 312 transitions, 5783 flow [2024-11-19 01:50:20,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 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 01:50:20,679 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:20,679 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:20,691 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 01:50:20,880 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,SelfDestructingSolverStorable12 [2024-11-19 01:50:20,880 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 01:50:20,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:20,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1258067090, now seen corresponding path program 7 times [2024-11-19 01:50:20,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:20,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721973104] [2024-11-19 01:50:20,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:50:20,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:50:20,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:20,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:20,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721973104] [2024-11-19 01:50:20,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721973104] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:50:20,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931706304] [2024-11-19 01:50:20,961 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:50:20,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:20,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:50:20,963 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 01:50:20,965 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 01:50:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:50:21,011 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 01:50:21,012 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:50:21,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:21,064 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:50:21,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:21,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931706304] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:50:21,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:50:21,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-19 01:50:21,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845366169] [2024-11-19 01:50:21,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:50:21,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 01:50:21,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:21,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 01:50:21,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-19 01:50:21,113 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-19 01:50:21,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 312 transitions, 5783 flow. Second operand has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 0 states have call successors, (0), 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 01:50:21,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:21,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-19 01:50:21,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:22,005 INFO L124 PetriNetUnfolderBase]: 2535/4207 cut-off events. [2024-11-19 01:50:22,005 INFO L125 PetriNetUnfolderBase]: For 127485/127485 co-relation queries the response was YES. [2024-11-19 01:50:22,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34153 conditions, 4207 events. 2535/4207 cut-off events. For 127485/127485 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 23686 event pairs, 327 based on Foata normal form. 8/4215 useless extension candidates. Maximal degree in co-relation 32271. Up to 1027 conditions per place. [2024-11-19 01:50:22,139 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 229 selfloop transitions, 159 changer transitions 4/393 dead transitions. [2024-11-19 01:50:22,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 393 transitions, 7608 flow [2024-11-19 01:50:22,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 01:50:22,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-19 01:50:22,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 141 transitions. [2024-11-19 01:50:22,141 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.493006993006993 [2024-11-19 01:50:22,141 INFO L175 Difference]: Start difference. First operand has 190 places, 312 transitions, 5783 flow. Second operand 13 states and 141 transitions. [2024-11-19 01:50:22,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 393 transitions, 7608 flow [2024-11-19 01:50:22,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 393 transitions, 7517 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-11-19 01:50:22,548 INFO L231 Difference]: Finished difference. Result has 197 places, 310 transitions, 6031 flow [2024-11-19 01:50:22,548 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=5684, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6031, PETRI_PLACES=197, PETRI_TRANSITIONS=310} [2024-11-19 01:50:22,549 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 173 predicate places. [2024-11-19 01:50:22,549 INFO L471 AbstractCegarLoop]: Abstraction has has 197 places, 310 transitions, 6031 flow [2024-11-19 01:50:22,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 0 states have call successors, (0), 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 01:50:22,549 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:22,549 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:22,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-19 01:50:22,750 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,SelfDestructingSolverStorable13 [2024-11-19 01:50:22,751 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 01:50:22,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:22,751 INFO L85 PathProgramCache]: Analyzing trace with hash -128314632, now seen corresponding path program 8 times [2024-11-19 01:50:22,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:22,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673023135] [2024-11-19 01:50:22,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:50:22,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:22,758 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:50:22,759 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:22,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:22,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673023135] [2024-11-19 01:50:22,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673023135] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:50:22,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369416560] [2024-11-19 01:50:22,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:50:22,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:22,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:50:22,829 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 01:50:22,831 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 01:50:22,879 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:50:22,879 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:22,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 01:50:22,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:50:22,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:22,952 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:50:22,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:22,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369416560] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:50:22,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:50:22,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-11-19 01:50:22,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770631305] [2024-11-19 01:50:22,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:50:22,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 01:50:22,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:22,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 01:50:22,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-11-19 01:50:22,998 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-19 01:50:22,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 310 transitions, 6031 flow. Second operand has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 13 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 01:50:22,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:22,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-19 01:50:22,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:24,041 INFO L124 PetriNetUnfolderBase]: 2760/4562 cut-off events. [2024-11-19 01:50:24,041 INFO L125 PetriNetUnfolderBase]: For 150654/150654 co-relation queries the response was YES. [2024-11-19 01:50:24,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38416 conditions, 4562 events. 2760/4562 cut-off events. For 150654/150654 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 25611 event pairs, 159 based on Foata normal form. 54/4616 useless extension candidates. Maximal degree in co-relation 36458. Up to 936 conditions per place. [2024-11-19 01:50:24,080 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 173 selfloop transitions, 293 changer transitions 6/473 dead transitions. [2024-11-19 01:50:24,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 473 transitions, 9327 flow [2024-11-19 01:50:24,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-19 01:50:24,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-19 01:50:24,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 234 transitions. [2024-11-19 01:50:24,082 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4254545454545455 [2024-11-19 01:50:24,082 INFO L175 Difference]: Start difference. First operand has 197 places, 310 transitions, 6031 flow. Second operand 25 states and 234 transitions. [2024-11-19 01:50:24,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 473 transitions, 9327 flow [2024-11-19 01:50:24,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 473 transitions, 9030 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-11-19 01:50:24,609 INFO L231 Difference]: Finished difference. Result has 217 places, 368 transitions, 8113 flow [2024-11-19 01:50:24,609 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=5736, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=8113, PETRI_PLACES=217, PETRI_TRANSITIONS=368} [2024-11-19 01:50:24,610 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 193 predicate places. [2024-11-19 01:50:24,610 INFO L471 AbstractCegarLoop]: Abstraction has has 217 places, 368 transitions, 8113 flow [2024-11-19 01:50:24,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 13 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 01:50:24,610 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:24,610 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:24,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-19 01:50:24,811 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,SelfDestructingSolverStorable14 [2024-11-19 01:50:24,811 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 01:50:24,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:24,812 INFO L85 PathProgramCache]: Analyzing trace with hash 329025964, now seen corresponding path program 9 times [2024-11-19 01:50:24,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:24,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714857649] [2024-11-19 01:50:24,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:50:24,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:24,821 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 01:50:24,821 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:24,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:24,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:24,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714857649] [2024-11-19 01:50:24,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714857649] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:50:24,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145481464] [2024-11-19 01:50:24,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:50:24,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:24,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:50:24,883 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 01:50:24,884 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 01:50:24,924 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 01:50:24,924 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:24,925 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 01:50:24,926 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:50:25,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:25,011 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:50:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:25,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145481464] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:50:25,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:50:25,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-19 01:50:25,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117415996] [2024-11-19 01:50:25,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:50:25,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 01:50:25,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:25,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 01:50:25,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-19 01:50:25,067 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-19 01:50:25,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 368 transitions, 8113 flow. Second operand has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 0 states have call successors, (0), 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 01:50:25,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:25,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-19 01:50:25,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:26,407 INFO L124 PetriNetUnfolderBase]: 3102/5171 cut-off events. [2024-11-19 01:50:26,407 INFO L125 PetriNetUnfolderBase]: For 196634/196634 co-relation queries the response was YES. [2024-11-19 01:50:26,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46447 conditions, 5171 events. 3102/5171 cut-off events. For 196634/196634 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 30212 event pairs, 131 based on Foata normal form. 30/5201 useless extension candidates. Maximal degree in co-relation 43700. Up to 1005 conditions per place. [2024-11-19 01:50:26,451 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 227 selfloop transitions, 318 changer transitions 6/552 dead transitions. [2024-11-19 01:50:26,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 552 transitions, 12118 flow [2024-11-19 01:50:26,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-19 01:50:26,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-19 01:50:26,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 238 transitions. [2024-11-19 01:50:26,453 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43272727272727274 [2024-11-19 01:50:26,453 INFO L175 Difference]: Start difference. First operand has 217 places, 368 transitions, 8113 flow. Second operand 25 states and 238 transitions. [2024-11-19 01:50:26,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 552 transitions, 12118 flow [2024-11-19 01:50:27,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 552 transitions, 11518 flow, removed 130 selfloop flow, removed 16 redundant places. [2024-11-19 01:50:27,313 INFO L231 Difference]: Finished difference. Result has 230 places, 417 transitions, 9717 flow [2024-11-19 01:50:27,313 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=7609, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=9717, PETRI_PLACES=230, PETRI_TRANSITIONS=417} [2024-11-19 01:50:27,314 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 206 predicate places. [2024-11-19 01:50:27,314 INFO L471 AbstractCegarLoop]: Abstraction has has 230 places, 417 transitions, 9717 flow [2024-11-19 01:50:27,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 0 states have call successors, (0), 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 01:50:27,314 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:27,314 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:27,326 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 01:50:27,515 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,SelfDestructingSolverStorable15 [2024-11-19 01:50:27,515 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 01:50:27,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:27,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1658996268, now seen corresponding path program 10 times [2024-11-19 01:50:27,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:27,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073060072] [2024-11-19 01:50:27,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:50:27,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:27,522 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:50:27,522 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:27,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:27,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073060072] [2024-11-19 01:50:27,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073060072] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:50:27,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882556059] [2024-11-19 01:50:27,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:50:27,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:27,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:50:27,572 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 01:50:27,573 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 01:50:27,615 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:50:27,615 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:27,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 01:50:27,617 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:50:27,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:27,673 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:50:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:27,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882556059] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:50:27,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:50:27,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-19 01:50:27,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680058069] [2024-11-19 01:50:27,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:50:27,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 01:50:27,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:27,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 01:50:27,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-11-19 01:50:27,704 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-19 01:50:27,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 417 transitions, 9717 flow. Second operand has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 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 01:50:27,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:27,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-19 01:50:27,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:29,106 INFO L124 PetriNetUnfolderBase]: 3499/5805 cut-off events. [2024-11-19 01:50:29,106 INFO L125 PetriNetUnfolderBase]: For 255745/255745 co-relation queries the response was YES. [2024-11-19 01:50:29,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53493 conditions, 5805 events. 3499/5805 cut-off events. For 255745/255745 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 34564 event pairs, 1261 based on Foata normal form. 18/5823 useless extension candidates. Maximal degree in co-relation 51258. Up to 4501 conditions per place. [2024-11-19 01:50:29,171 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 456 selfloop transitions, 62 changer transitions 2/521 dead transitions. [2024-11-19 01:50:29,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 521 transitions, 12363 flow [2024-11-19 01:50:29,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 01:50:29,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-19 01:50:29,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 134 transitions. [2024-11-19 01:50:29,173 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46853146853146854 [2024-11-19 01:50:29,173 INFO L175 Difference]: Start difference. First operand has 230 places, 417 transitions, 9717 flow. Second operand 13 states and 134 transitions. [2024-11-19 01:50:29,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 521 transitions, 12363 flow [2024-11-19 01:50:30,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 521 transitions, 11963 flow, removed 50 selfloop flow, removed 11 redundant places. [2024-11-19 01:50:30,484 INFO L231 Difference]: Finished difference. Result has 238 places, 443 transitions, 10146 flow [2024-11-19 01:50:30,484 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9366, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10146, PETRI_PLACES=238, PETRI_TRANSITIONS=443} [2024-11-19 01:50:30,485 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 214 predicate places. [2024-11-19 01:50:30,485 INFO L471 AbstractCegarLoop]: Abstraction has has 238 places, 443 transitions, 10146 flow [2024-11-19 01:50:30,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 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 01:50:30,485 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:30,485 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:30,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-19 01:50:30,686 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,SelfDestructingSolverStorable16 [2024-11-19 01:50:30,686 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 01:50:30,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:30,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1514502892, now seen corresponding path program 11 times [2024-11-19 01:50:30,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:30,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642914797] [2024-11-19 01:50:30,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:50:30,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:30,694 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-19 01:50:30,694 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:30,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:30,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:30,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642914797] [2024-11-19 01:50:30,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642914797] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:50:30,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127875520] [2024-11-19 01:50:30,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:50:30,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:30,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:50:30,774 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 01:50:30,775 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 01:50:30,827 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-19 01:50:30,827 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:30,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 01:50:30,829 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:50:30,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:30,889 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:50:30,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:30,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127875520] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:50:30,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:50:30,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-19 01:50:30,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089697322] [2024-11-19 01:50:30,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:50:30,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 01:50:30,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:30,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 01:50:30,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-11-19 01:50:30,933 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-19 01:50:30,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 443 transitions, 10146 flow. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 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 01:50:30,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:30,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-19 01:50:30,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:32,316 INFO L124 PetriNetUnfolderBase]: 3851/6372 cut-off events. [2024-11-19 01:50:32,317 INFO L125 PetriNetUnfolderBase]: For 305115/305115 co-relation queries the response was YES. [2024-11-19 01:50:32,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60213 conditions, 6372 events. 3851/6372 cut-off events. For 305115/305115 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 38327 event pairs, 602 based on Foata normal form. 84/6456 useless extension candidates. Maximal degree in co-relation 58858. Up to 2740 conditions per place. [2024-11-19 01:50:32,391 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 343 selfloop transitions, 242 changer transitions 3/589 dead transitions. [2024-11-19 01:50:32,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 589 transitions, 13722 flow [2024-11-19 01:50:32,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-19 01:50:32,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-19 01:50:32,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 201 transitions. [2024-11-19 01:50:32,393 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45681818181818185 [2024-11-19 01:50:32,393 INFO L175 Difference]: Start difference. First operand has 238 places, 443 transitions, 10146 flow. Second operand 20 states and 201 transitions. [2024-11-19 01:50:32,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 589 transitions, 13722 flow [2024-11-19 01:50:34,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 589 transitions, 13538 flow, removed 66 selfloop flow, removed 4 redundant places. [2024-11-19 01:50:34,029 INFO L231 Difference]: Finished difference. Result has 264 places, 477 transitions, 11923 flow [2024-11-19 01:50:34,029 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9985, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=11923, PETRI_PLACES=264, PETRI_TRANSITIONS=477} [2024-11-19 01:50:34,030 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 240 predicate places. [2024-11-19 01:50:34,030 INFO L471 AbstractCegarLoop]: Abstraction has has 264 places, 477 transitions, 11923 flow [2024-11-19 01:50:34,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 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 01:50:34,030 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:34,030 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:34,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-19 01:50:34,231 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,SelfDestructingSolverStorable17 [2024-11-19 01:50:34,231 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 01:50:34,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:34,232 INFO L85 PathProgramCache]: Analyzing trace with hash 221984848, now seen corresponding path program 12 times [2024-11-19 01:50:34,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:34,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082561277] [2024-11-19 01:50:34,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:50:34,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:34,240 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-19 01:50:34,240 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:34,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:34,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:34,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082561277] [2024-11-19 01:50:34,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082561277] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:50:34,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757875538] [2024-11-19 01:50:34,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 01:50:34,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:34,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:50:34,310 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 01:50:34,312 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 01:50:34,358 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-19 01:50:34,359 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:34,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 01:50:34,361 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:50:34,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:34,471 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:50:34,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:50:34,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757875538] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:50:34,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:50:34,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-11-19 01:50:34,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341074073] [2024-11-19 01:50:34,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:50:34,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 01:50:34,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:34,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 01:50:34,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-11-19 01:50:34,522 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-19 01:50:34,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 477 transitions, 11923 flow. Second operand has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 0 states have call successors, (0), 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 01:50:34,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:34,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-19 01:50:34,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:36,506 INFO L124 PetriNetUnfolderBase]: 4033/6665 cut-off events. [2024-11-19 01:50:36,507 INFO L125 PetriNetUnfolderBase]: For 397109/397109 co-relation queries the response was YES. [2024-11-19 01:50:36,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68052 conditions, 6665 events. 4033/6665 cut-off events. For 397109/397109 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 40170 event pairs, 610 based on Foata normal form. 54/6719 useless extension candidates. Maximal degree in co-relation 67497. Up to 2557 conditions per place. [2024-11-19 01:50:36,568 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 321 selfloop transitions, 271 changer transitions 2/595 dead transitions. [2024-11-19 01:50:36,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 595 transitions, 15113 flow [2024-11-19 01:50:36,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-19 01:50:36,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-19 01:50:36,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 170 transitions. [2024-11-19 01:50:36,569 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-11-19 01:50:36,569 INFO L175 Difference]: Start difference. First operand has 264 places, 477 transitions, 11923 flow. Second operand 18 states and 170 transitions. [2024-11-19 01:50:36,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 595 transitions, 15113 flow [2024-11-19 01:50:38,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 595 transitions, 14692 flow, removed 177 selfloop flow, removed 5 redundant places. [2024-11-19 01:50:38,569 INFO L231 Difference]: Finished difference. Result has 283 places, 501 transitions, 13294 flow [2024-11-19 01:50:38,570 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11585, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=13294, PETRI_PLACES=283, PETRI_TRANSITIONS=501} [2024-11-19 01:50:38,570 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 259 predicate places. [2024-11-19 01:50:38,570 INFO L471 AbstractCegarLoop]: Abstraction has has 283 places, 501 transitions, 13294 flow [2024-11-19 01:50:38,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 0 states have call successors, (0), 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 01:50:38,571 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:38,571 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:38,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-19 01:50:38,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:38,772 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:50:38,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:38,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1053827436, now seen corresponding path program 13 times [2024-11-19 01:50:38,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:38,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437044563] [2024-11-19 01:50:38,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:50:38,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:50:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:38,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:38,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437044563] [2024-11-19 01:50:38,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437044563] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:50:38,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873166808] [2024-11-19 01:50:38,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 01:50:38,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:38,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:50:38,849 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 01:50:38,851 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 01:50:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:50:38,900 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 01:50:38,901 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:50:38,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:38,952 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:50:38,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:38,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873166808] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:50:38,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:50:38,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-11-19 01:50:38,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982844910] [2024-11-19 01:50:38,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:50:38,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 01:50:38,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:38,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 01:50:38,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-11-19 01:50:38,995 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-19 01:50:38,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 501 transitions, 13294 flow. Second operand has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 13 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 01:50:38,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:38,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-19 01:50:38,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:40,449 INFO L124 PetriNetUnfolderBase]: 4030/6660 cut-off events. [2024-11-19 01:50:40,450 INFO L125 PetriNetUnfolderBase]: For 439859/439859 co-relation queries the response was YES. [2024-11-19 01:50:40,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70904 conditions, 6660 events. 4030/6660 cut-off events. For 439859/439859 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 40351 event pairs, 1516 based on Foata normal form. 8/6668 useless extension candidates. Maximal degree in co-relation 70234. Up to 5399 conditions per place. [2024-11-19 01:50:40,520 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 485 selfloop transitions, 67 changer transitions 2/555 dead transitions. [2024-11-19 01:50:40,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 555 transitions, 15149 flow [2024-11-19 01:50:40,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 01:50:40,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 01:50:40,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 115 transitions. [2024-11-19 01:50:40,521 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47520661157024796 [2024-11-19 01:50:40,521 INFO L175 Difference]: Start difference. First operand has 283 places, 501 transitions, 13294 flow. Second operand 11 states and 115 transitions. [2024-11-19 01:50:40,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 555 transitions, 15149 flow [2024-11-19 01:50:42,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 555 transitions, 14862 flow, removed 94 selfloop flow, removed 14 redundant places. [2024-11-19 01:50:42,514 INFO L231 Difference]: Finished difference. Result has 279 places, 499 transitions, 13159 flow [2024-11-19 01:50:42,515 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12999, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13159, PETRI_PLACES=279, PETRI_TRANSITIONS=499} [2024-11-19 01:50:42,515 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 255 predicate places. [2024-11-19 01:50:42,515 INFO L471 AbstractCegarLoop]: Abstraction has has 279 places, 499 transitions, 13159 flow [2024-11-19 01:50:42,515 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 13 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 01:50:42,515 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:42,515 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:42,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-19 01:50:42,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:42,716 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:50:42,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:42,717 INFO L85 PathProgramCache]: Analyzing trace with hash 857992749, now seen corresponding path program 14 times [2024-11-19 01:50:42,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:42,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747979730] [2024-11-19 01:50:42,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:50:42,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:42,726 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:50:42,726 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:42,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:50:42,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:42,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747979730] [2024-11-19 01:50:42,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747979730] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:50:42,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490181917] [2024-11-19 01:50:42,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:50:42,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:42,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:50:42,799 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:50:42,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-19 01:50:42,846 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:50:42,847 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:42,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-19 01:50:42,848 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:50:42,891 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:42,892 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:50:42,934 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:42,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490181917] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:50:42,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:50:42,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 7 [2024-11-19 01:50:42,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945675542] [2024-11-19 01:50:42,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:50:42,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 01:50:42,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:42,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 01:50:42,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-19 01:50:42,936 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-11-19 01:50:42,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 499 transitions, 13159 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 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 01:50:42,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:42,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-11-19 01:50:42,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:45,577 INFO L124 PetriNetUnfolderBase]: 6257/10674 cut-off events. [2024-11-19 01:50:45,577 INFO L125 PetriNetUnfolderBase]: For 631280/631668 co-relation queries the response was YES. [2024-11-19 01:50:45,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111259 conditions, 10674 events. 6257/10674 cut-off events. For 631280/631668 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 74978 event pairs, 532 based on Foata normal form. 148/10745 useless extension candidates. Maximal degree in co-relation 109519. Up to 3206 conditions per place. [2024-11-19 01:50:45,713 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 1070 selfloop transitions, 10 changer transitions 143/1276 dead transitions. [2024-11-19 01:50:45,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 1276 transitions, 37369 flow [2024-11-19 01:50:45,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:50:45,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:50:45,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2024-11-19 01:50:45,715 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7090909090909091 [2024-11-19 01:50:45,715 INFO L175 Difference]: Start difference. First operand has 279 places, 499 transitions, 13159 flow. Second operand 5 states and 78 transitions. [2024-11-19 01:50:45,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 1276 transitions, 37369 flow [2024-11-19 01:50:49,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 1276 transitions, 37131 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-11-19 01:50:49,821 INFO L231 Difference]: Finished difference. Result has 276 places, 495 transitions, 12882 flow [2024-11-19 01:50:49,821 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=13056, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=12882, PETRI_PLACES=276, PETRI_TRANSITIONS=495} [2024-11-19 01:50:49,822 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 252 predicate places. [2024-11-19 01:50:49,822 INFO L471 AbstractCegarLoop]: Abstraction has has 276 places, 495 transitions, 12882 flow [2024-11-19 01:50:49,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 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 01:50:49,822 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:50:49,822 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:50:49,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-19 01:50:50,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:50,023 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:50:50,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:50:50,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1580134653, now seen corresponding path program 15 times [2024-11-19 01:50:50,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:50:50,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385610757] [2024-11-19 01:50:50,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:50:50,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:50:50,031 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-19 01:50:50,031 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:50,109 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:50,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:50:50,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385610757] [2024-11-19 01:50:50,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385610757] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:50:50,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92792319] [2024-11-19 01:50:50,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:50:50,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:50:50,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:50:50,112 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:50:50,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-19 01:50:50,163 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-19 01:50:50,163 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:50:50,164 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 01:50:50,165 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:50:50,284 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:50,284 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:50:50,384 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:50:50,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92792319] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:50:50,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:50:50,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-11-19 01:50:50,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912334039] [2024-11-19 01:50:50,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:50:50,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 01:50:50,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:50:50,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 01:50:50,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-11-19 01:50:50,388 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-19 01:50:50,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 495 transitions, 12882 flow. Second operand has 17 states, 17 states have (on average 6.176470588235294) internal successors, (105), 17 states have internal predecessors, (105), 0 states have call successors, (0), 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 01:50:50,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:50:50,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-19 01:50:50,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:50:54,954 INFO L124 PetriNetUnfolderBase]: 9772/15983 cut-off events. [2024-11-19 01:50:54,955 INFO L125 PetriNetUnfolderBase]: For 1103278/1103278 co-relation queries the response was YES. [2024-11-19 01:50:55,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176885 conditions, 15983 events. 9772/15983 cut-off events. For 1103278/1103278 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 109016 event pairs, 319 based on Foata normal form. 185/16168 useless extension candidates. Maximal degree in co-relation 175187. Up to 3145 conditions per place. [2024-11-19 01:50:55,174 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 441 selfloop transitions, 598 changer transitions 28/1068 dead transitions. [2024-11-19 01:50:55,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 1068 transitions, 27753 flow [2024-11-19 01:50:55,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-19 01:50:55,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-11-19 01:50:55,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 365 transitions. [2024-11-19 01:50:55,176 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4366028708133971 [2024-11-19 01:50:55,176 INFO L175 Difference]: Start difference. First operand has 276 places, 495 transitions, 12882 flow. Second operand 38 states and 365 transitions. [2024-11-19 01:50:55,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 1068 transitions, 27753 flow [2024-11-19 01:51:03,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 1068 transitions, 27595 flow, removed 79 selfloop flow, removed 0 redundant places. [2024-11-19 01:51:03,749 INFO L231 Difference]: Finished difference. Result has 331 places, 730 transitions, 21828 flow [2024-11-19 01:51:03,749 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12874, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=366, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=21828, PETRI_PLACES=331, PETRI_TRANSITIONS=730} [2024-11-19 01:51:03,750 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 307 predicate places. [2024-11-19 01:51:03,750 INFO L471 AbstractCegarLoop]: Abstraction has has 331 places, 730 transitions, 21828 flow [2024-11-19 01:51:03,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.176470588235294) internal successors, (105), 17 states have internal predecessors, (105), 0 states have call successors, (0), 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 01:51:03,750 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:51:03,750 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:51:03,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-19 01:51:03,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:51:03,951 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:51:03,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:51:03,952 INFO L85 PathProgramCache]: Analyzing trace with hash -203036361, now seen corresponding path program 16 times [2024-11-19 01:51:03,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:51:03,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100929267] [2024-11-19 01:51:03,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:51:03,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:51:03,958 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:51:03,958 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:51:04,021 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:51:04,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:51:04,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100929267] [2024-11-19 01:51:04,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100929267] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:51:04,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73369150] [2024-11-19 01:51:04,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:51:04,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:51:04,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:51:04,024 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:51:04,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-19 01:51:04,072 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:51:04,072 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:51:04,073 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 01:51:04,074 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:51:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:51:04,134 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:51:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:51:04,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73369150] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:51:04,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:51:04,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-11-19 01:51:04,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620333925] [2024-11-19 01:51:04,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:51:04,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 01:51:04,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:51:04,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 01:51:04,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-19 01:51:04,198 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-19 01:51:04,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 730 transitions, 21828 flow. Second operand has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 0 states have call successors, (0), 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 01:51:04,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:51:04,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-19 01:51:04,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:51:10,636 INFO L124 PetriNetUnfolderBase]: 11804/19308 cut-off events. [2024-11-19 01:51:10,637 INFO L125 PetriNetUnfolderBase]: For 1685573/1685573 co-relation queries the response was YES. [2024-11-19 01:51:10,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232829 conditions, 19308 events. 11804/19308 cut-off events. For 1685573/1685573 co-relation queries the response was YES. Maximal size of possible extension queue 733. Compared 134861 event pairs, 593 based on Foata normal form. 71/19379 useless extension candidates. Maximal degree in co-relation 230809. Up to 6340 conditions per place. [2024-11-19 01:51:10,935 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 437 selfloop transitions, 854 changer transitions 73/1365 dead transitions. [2024-11-19 01:51:10,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 1365 transitions, 41521 flow [2024-11-19 01:51:10,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-19 01:51:10,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-19 01:51:10,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 183 transitions. [2024-11-19 01:51:10,937 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43779904306220097 [2024-11-19 01:51:10,937 INFO L175 Difference]: Start difference. First operand has 331 places, 730 transitions, 21828 flow. Second operand 19 states and 183 transitions. [2024-11-19 01:51:10,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 1365 transitions, 41521 flow [2024-11-19 01:51:27,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 1365 transitions, 39524 flow, removed 640 selfloop flow, removed 11 redundant places. [2024-11-19 01:51:27,401 INFO L231 Difference]: Finished difference. Result has 347 places, 1096 transitions, 35202 flow [2024-11-19 01:51:27,402 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=21005, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=492, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=35202, PETRI_PLACES=347, PETRI_TRANSITIONS=1096} [2024-11-19 01:51:27,402 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 323 predicate places. [2024-11-19 01:51:27,402 INFO L471 AbstractCegarLoop]: Abstraction has has 347 places, 1096 transitions, 35202 flow [2024-11-19 01:51:27,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 0 states have call successors, (0), 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 01:51:27,402 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:51:27,402 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:51:27,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-19 01:51:27,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:51:27,603 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:51:27,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:51:27,604 INFO L85 PathProgramCache]: Analyzing trace with hash -2113778485, now seen corresponding path program 17 times [2024-11-19 01:51:27,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:51:27,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882351825] [2024-11-19 01:51:27,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:51:27,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:51:27,610 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-19 01:51:27,610 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:51:27,673 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:51:27,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:51:27,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882351825] [2024-11-19 01:51:27,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882351825] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:51:27,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985196553] [2024-11-19 01:51:27,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 01:51:27,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:51:27,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:51:27,676 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:51:27,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-19 01:51:27,729 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-19 01:51:27,729 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:51:27,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 01:51:27,733 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:51:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:51:27,809 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:51:27,853 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:51:27,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985196553] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:51:27,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:51:27,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-19 01:51:27,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630904042] [2024-11-19 01:51:27,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:51:27,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 01:51:27,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:51:27,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 01:51:27,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-19 01:51:27,864 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-19 01:51:27,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 1096 transitions, 35202 flow. Second operand has 14 states, 14 states have (on average 5.642857142857143) internal successors, (79), 14 states have internal predecessors, (79), 0 states have call successors, (0), 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 01:51:27,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:51:27,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-19 01:51:27,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:51:36,838 INFO L124 PetriNetUnfolderBase]: 14308/23227 cut-off events. [2024-11-19 01:51:36,839 INFO L125 PetriNetUnfolderBase]: For 2186424/2186424 co-relation queries the response was YES. [2024-11-19 01:51:37,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287236 conditions, 23227 events. 14308/23227 cut-off events. For 2186424/2186424 co-relation queries the response was YES. Maximal size of possible extension queue 811. Compared 165308 event pairs, 1323 based on Foata normal form. 54/23281 useless extension candidates. Maximal degree in co-relation 285177. Up to 5097 conditions per place. [2024-11-19 01:51:37,267 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 716 selfloop transitions, 776 changer transitions 8/1501 dead transitions. [2024-11-19 01:51:37,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 1501 transitions, 48408 flow [2024-11-19 01:51:37,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-19 01:51:37,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-19 01:51:37,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 206 transitions. [2024-11-19 01:51:37,268 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-11-19 01:51:37,268 INFO L175 Difference]: Start difference. First operand has 347 places, 1096 transitions, 35202 flow. Second operand 20 states and 206 transitions. [2024-11-19 01:51:37,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 1501 transitions, 48408 flow