./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/clever.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/clever.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:25:44,563 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:25:44,643 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:25:44,650 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:25:44,651 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:25:44,676 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:25:44,679 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:25:44,679 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:25:44,680 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:25:44,680 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:25:44,681 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:25:44,681 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:25:44,682 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:25:44,683 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:25:44,683 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:25:44,685 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:25:44,685 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:25:44,686 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:25:44,686 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:25:44,686 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:25:44,686 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:25:44,690 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:25:44,691 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:25:44,691 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:25:44,691 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:25:44,691 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:25:44,692 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:25:44,692 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:25:44,692 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:25:44,693 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:25:44,693 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:25:44,693 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:25:44,693 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:25:44,693 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:25:44,694 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:25:44,694 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:25:44,694 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:25:44,694 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:25:44,695 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:25:44,695 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:25:44,695 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:25:44,695 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:25:44,697 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1b460e4dbdd0bf3097d690d1720c7a2141566e2aa4ca1ed003c7fa25661851d [2024-11-16 19:25:44,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:25:44,971 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:25:44,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:25:44,976 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:25:44,977 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:25:44,978 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/clever.wvr.c [2024-11-16 19:25:46,453 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:25:46,633 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:25:46,633 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/clever.wvr.c [2024-11-16 19:25:46,641 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/930ab3022/270f4a6d28954a7d9636b6f0018e138a/FLAG8d9c9d29d [2024-11-16 19:25:46,653 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/930ab3022/270f4a6d28954a7d9636b6f0018e138a [2024-11-16 19:25:46,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:25:46,657 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:25:46,659 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:25:46,659 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:25:46,665 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:25:46,666 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:25:46" (1/1) ... [2024-11-16 19:25:46,667 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cd6fa61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:25:46, skipping insertion in model container [2024-11-16 19:25:46,667 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:25:46" (1/1) ... [2024-11-16 19:25:46,692 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:25:46,923 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/clever.wvr.c[2159,2172] [2024-11-16 19:25:46,929 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:25:46,939 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:25:46,962 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/clever.wvr.c[2159,2172] [2024-11-16 19:25:46,965 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:25:46,983 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:25:46,984 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:25:46 WrapperNode [2024-11-16 19:25:46,984 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:25:46,985 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:25:46,986 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:25:46,986 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:25:46,993 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:25:46" (1/1) ... [2024-11-16 19:25:47,001 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:25:46" (1/1) ... [2024-11-16 19:25:47,076 INFO L138 Inliner]: procedures = 18, calls = 11, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2024-11-16 19:25:47,081 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:25:47,082 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:25:47,082 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:25:47,082 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:25:47,128 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:25:46" (1/1) ... [2024-11-16 19:25:47,132 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:25:46" (1/1) ... [2024-11-16 19:25:47,134 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:25:46" (1/1) ... [2024-11-16 19:25:47,156 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]. [2024-11-16 19:25:47,158 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:25:46" (1/1) ... [2024-11-16 19:25:47,158 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:25:46" (1/1) ... [2024-11-16 19:25:47,166 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:25:46" (1/1) ... [2024-11-16 19:25:47,166 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:25:46" (1/1) ... [2024-11-16 19:25:47,167 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:25:46" (1/1) ... [2024-11-16 19:25:47,168 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:25:46" (1/1) ... [2024-11-16 19:25:47,170 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:25:47,171 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:25:47,171 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:25:47,171 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:25:47,172 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:25:46" (1/1) ... [2024-11-16 19:25:47,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:25:47,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:25:47,209 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) [2024-11-16 19:25:47,212 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 [2024-11-16 19:25:47,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:25:47,262 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-16 19:25:47,262 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-16 19:25:47,263 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-16 19:25:47,263 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-16 19:25:47,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:25:47,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:25:47,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:25:47,266 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-16 19:25:47,373 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:25:47,376 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:25:47,589 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:25:47,590 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:25:47,784 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:25:47,784 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:25:47,785 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:25:47 BoogieIcfgContainer [2024-11-16 19:25:47,785 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:25:47,787 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:25:47,787 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:25:47,792 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:25:47,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:25:46" (1/3) ... [2024-11-16 19:25:47,793 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a2bc54c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:25:47, skipping insertion in model container [2024-11-16 19:25:47,794 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:25:46" (2/3) ... [2024-11-16 19:25:47,795 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a2bc54c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:25:47, skipping insertion in model container [2024-11-16 19:25:47,795 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:25:47" (3/3) ... [2024-11-16 19:25:47,796 INFO L112 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2024-11-16 19:25:47,812 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:25:47,812 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 19:25:47,812 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:25:47,852 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-16 19:25:47,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 29 transitions, 72 flow [2024-11-16 19:25:47,923 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2024-11-16 19:25:47,925 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:25:47,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 6/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 38 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2024-11-16 19:25:47,928 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 29 transitions, 72 flow [2024-11-16 19:25:47,933 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 26 transitions, 64 flow [2024-11-16 19:25:47,946 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:25:47,955 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;@3ee694a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:25:47,955 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-16 19:25:47,966 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:25:47,969 INFO L124 PetriNetUnfolderBase]: 6/25 cut-off events. [2024-11-16 19:25:47,969 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:25:47,969 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:25:47,970 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:25:47,971 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:25:47,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:25:47,976 INFO L85 PathProgramCache]: Analyzing trace with hash 83474084, now seen corresponding path program 1 times [2024-11-16 19:25:47,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:25:47,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359954575] [2024-11-16 19:25:47,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:25:47,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:25:48,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:25:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:25:48,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:25:48,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359954575] [2024-11-16 19:25:48,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359954575] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:25:48,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:25:48,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:25:48,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793096820] [2024-11-16 19:25:48,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:25:48,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:25:48,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:25:48,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:25:48,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:25:48,189 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-11-16 19:25:48,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 64 flow. Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:25:48,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:25:48,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-11-16 19:25:48,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:25:48,263 INFO L124 PetriNetUnfolderBase]: 57/118 cut-off events. [2024-11-16 19:25:48,265 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-16 19:25:48,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 118 events. 57/118 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 409 event pairs, 23 based on Foata normal form. 33/130 useless extension candidates. Maximal degree in co-relation 193. Up to 91 conditions per place. [2024-11-16 19:25:48,268 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 14 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2024-11-16 19:25:48,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 23 transitions, 86 flow [2024-11-16 19:25:48,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:25:48,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:25:48,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 39 transitions. [2024-11-16 19:25:48,280 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6724137931034483 [2024-11-16 19:25:48,282 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 64 flow. Second operand 2 states and 39 transitions. [2024-11-16 19:25:48,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 23 transitions, 86 flow [2024-11-16 19:25:48,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 23 transitions, 78 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-16 19:25:48,286 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 50 flow [2024-11-16 19:25:48,288 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=50, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2024-11-16 19:25:48,293 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2024-11-16 19:25:48,295 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 50 flow [2024-11-16 19:25:48,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:25:48,295 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:25:48,295 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:25:48,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 19:25:48,296 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:25:48,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:25:48,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1405387965, now seen corresponding path program 1 times [2024-11-16 19:25:48,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:25:48,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985699327] [2024-11-16 19:25:48,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:25:48,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:25:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:25:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:25:48,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:25:48,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985699327] [2024-11-16 19:25:48,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985699327] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:25:48,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:25:48,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:25:48,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985300468] [2024-11-16 19:25:48,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:25:48,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:25:48,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:25:48,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:25:48,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:25:48,695 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 29 [2024-11-16 19:25:48,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 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) [2024-11-16 19:25:48,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:25:48,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 29 [2024-11-16 19:25:48,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:25:48,834 INFO L124 PetriNetUnfolderBase]: 106/220 cut-off events. [2024-11-16 19:25:48,834 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:25:48,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 220 events. 106/220 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 944 event pairs, 19 based on Foata normal form. 1/201 useless extension candidates. Maximal degree in co-relation 394. Up to 110 conditions per place. [2024-11-16 19:25:48,838 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 21 selfloop transitions, 3 changer transitions 1/34 dead transitions. [2024-11-16 19:25:48,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 34 transitions, 125 flow [2024-11-16 19:25:48,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:25:48,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:25:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2024-11-16 19:25:48,841 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6781609195402298 [2024-11-16 19:25:48,842 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 50 flow. Second operand 3 states and 59 transitions. [2024-11-16 19:25:48,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 34 transitions, 125 flow [2024-11-16 19:25:48,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 34 transitions, 125 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:25:48,844 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 69 flow [2024-11-16 19:25:48,845 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2024-11-16 19:25:48,846 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2024-11-16 19:25:48,847 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 69 flow [2024-11-16 19:25:48,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 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) [2024-11-16 19:25:48,847 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:25:48,848 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:25:48,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 19:25:48,848 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:25:48,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:25:48,850 INFO L85 PathProgramCache]: Analyzing trace with hash -980199968, now seen corresponding path program 1 times [2024-11-16 19:25:48,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:25:48,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129262523] [2024-11-16 19:25:48,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:25:48,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:25:48,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:25:48,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:25:48,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:25:48,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129262523] [2024-11-16 19:25:48,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129262523] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:25:48,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:25:48,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:25:48,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567394245] [2024-11-16 19:25:48,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:25:48,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:25:48,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:25:48,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:25:48,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:25:48,967 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-11-16 19:25:48,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 69 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:25:48,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:25:48,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-11-16 19:25:48,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:25:49,114 INFO L124 PetriNetUnfolderBase]: 215/419 cut-off events. [2024-11-16 19:25:49,114 INFO L125 PetriNetUnfolderBase]: For 75/75 co-relation queries the response was YES. [2024-11-16 19:25:49,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 898 conditions, 419 events. 215/419 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1945 event pairs, 22 based on Foata normal form. 10/381 useless extension candidates. Maximal degree in co-relation 893. Up to 121 conditions per place. [2024-11-16 19:25:49,119 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 42 selfloop transitions, 7 changer transitions 2/58 dead transitions. [2024-11-16 19:25:49,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 58 transitions, 264 flow [2024-11-16 19:25:49,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:25:49,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:25:49,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-11-16 19:25:49,123 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6275862068965518 [2024-11-16 19:25:49,123 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 69 flow. Second operand 5 states and 91 transitions. [2024-11-16 19:25:49,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 58 transitions, 264 flow [2024-11-16 19:25:49,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 58 transitions, 257 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:25:49,126 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 117 flow [2024-11-16 19:25:49,126 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=117, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2024-11-16 19:25:49,127 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2024-11-16 19:25:49,127 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 117 flow [2024-11-16 19:25:49,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:25:49,128 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:25:49,128 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:25:49,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 19:25:49,128 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:25:49,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:25:49,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1814716804, now seen corresponding path program 2 times [2024-11-16 19:25:49,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:25:49,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477203420] [2024-11-16 19:25:49,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:25:49,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:25:49,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:25:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:25:49,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:25:49,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477203420] [2024-11-16 19:25:49,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477203420] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:25:49,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:25:49,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:25:49,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501790262] [2024-11-16 19:25:49,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:25:49,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:25:49,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:25:49,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:25:49,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:25:49,208 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-11-16 19:25:49,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 117 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:25:49,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:25:49,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-11-16 19:25:49,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:25:49,334 INFO L124 PetriNetUnfolderBase]: 236/468 cut-off events. [2024-11-16 19:25:49,334 INFO L125 PetriNetUnfolderBase]: For 435/435 co-relation queries the response was YES. [2024-11-16 19:25:49,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1200 conditions, 468 events. 236/468 cut-off events. For 435/435 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2166 event pairs, 18 based on Foata normal form. 6/466 useless extension candidates. Maximal degree in co-relation 1192. Up to 180 conditions per place. [2024-11-16 19:25:49,341 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 36 selfloop transitions, 11 changer transitions 6/60 dead transitions. [2024-11-16 19:25:49,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 60 transitions, 331 flow [2024-11-16 19:25:49,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:25:49,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:25:49,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-11-16 19:25:49,346 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6068965517241379 [2024-11-16 19:25:49,346 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 117 flow. Second operand 5 states and 88 transitions. [2024-11-16 19:25:49,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 60 transitions, 331 flow [2024-11-16 19:25:49,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 60 transitions, 331 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:25:49,352 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 182 flow [2024-11-16 19:25:49,352 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=182, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2024-11-16 19:25:49,353 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 13 predicate places. [2024-11-16 19:25:49,353 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 182 flow [2024-11-16 19:25:49,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:25:49,354 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:25:49,354 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:25:49,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-16 19:25:49,354 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:25:49,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:25:49,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1050456300, now seen corresponding path program 1 times [2024-11-16 19:25:49,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:25:49,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598673991] [2024-11-16 19:25:49,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:25:49,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:25:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:25:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:25:49,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:25:49,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598673991] [2024-11-16 19:25:49,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598673991] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:25:49,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976511442] [2024-11-16 19:25:49,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:25:49,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:25:49,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:25:49,782 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) [2024-11-16 19:25:49,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 19:25:49,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:25:49,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-16 19:25:49,868 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:25:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:25:50,258 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:25:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:25:54,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976511442] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:25:54,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:25:54,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-16 19:25:54,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434550626] [2024-11-16 19:25:54,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:25:54,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-16 19:25:54,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:25:54,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-16 19:25:54,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=102, Unknown=1, NotChecked=0, Total=156 [2024-11-16 19:25:58,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-16 19:25:58,529 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-11-16 19:25:58,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 182 flow. Second operand has 13 states, 13 states have (on average 12.0) internal successors, (156), 13 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:25:58,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:25:58,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-11-16 19:25:58,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:25:59,555 INFO L124 PetriNetUnfolderBase]: 1016/1949 cut-off events. [2024-11-16 19:25:59,555 INFO L125 PetriNetUnfolderBase]: For 2981/3008 co-relation queries the response was YES. [2024-11-16 19:25:59,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5727 conditions, 1949 events. 1016/1949 cut-off events. For 2981/3008 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11746 event pairs, 52 based on Foata normal form. 29/1969 useless extension candidates. Maximal degree in co-relation 5715. Up to 398 conditions per place. [2024-11-16 19:25:59,572 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 169 selfloop transitions, 50 changer transitions 10/238 dead transitions. [2024-11-16 19:25:59,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 238 transitions, 1651 flow [2024-11-16 19:25:59,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-16 19:25:59,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-16 19:25:59,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 345 transitions. [2024-11-16 19:25:59,575 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6609195402298851 [2024-11-16 19:25:59,575 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 182 flow. Second operand 18 states and 345 transitions. [2024-11-16 19:25:59,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 238 transitions, 1651 flow [2024-11-16 19:25:59,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 238 transitions, 1629 flow, removed 11 selfloop flow, removed 0 redundant places. [2024-11-16 19:25:59,588 INFO L231 Difference]: Finished difference. Result has 67 places, 96 transitions, 743 flow [2024-11-16 19:25:59,588 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=743, PETRI_PLACES=67, PETRI_TRANSITIONS=96} [2024-11-16 19:25:59,589 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 40 predicate places. [2024-11-16 19:25:59,589 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 96 transitions, 743 flow [2024-11-16 19:25:59,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.0) internal successors, (156), 13 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:25:59,590 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:25:59,590 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:25:59,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 19:25:59,794 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 [2024-11-16 19:25:59,795 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:25:59,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:25:59,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1237553466, now seen corresponding path program 1 times [2024-11-16 19:25:59,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:25:59,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159872977] [2024-11-16 19:25:59,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:25:59,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:25:59,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:25:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:25:59,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:25:59,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159872977] [2024-11-16 19:25:59,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159872977] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:25:59,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:25:59,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:25:59,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040341201] [2024-11-16 19:25:59,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:25:59,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:25:59,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:25:59,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:25:59,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:25:59,874 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-11-16 19:25:59,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 96 transitions, 743 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:25:59,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:25:59,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-11-16 19:25:59,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:26:00,144 INFO L124 PetriNetUnfolderBase]: 1067/2145 cut-off events. [2024-11-16 19:26:00,145 INFO L125 PetriNetUnfolderBase]: For 6707/6783 co-relation queries the response was YES. [2024-11-16 19:26:00,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7341 conditions, 2145 events. 1067/2145 cut-off events. For 6707/6783 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13756 event pairs, 137 based on Foata normal form. 59/2192 useless extension candidates. Maximal degree in co-relation 7318. Up to 1264 conditions per place. [2024-11-16 19:26:00,165 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 106 selfloop transitions, 10 changer transitions 4/137 dead transitions. [2024-11-16 19:26:00,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 137 transitions, 1282 flow [2024-11-16 19:26:00,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 19:26:00,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-16 19:26:00,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 75 transitions. [2024-11-16 19:26:00,167 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.646551724137931 [2024-11-16 19:26:00,167 INFO L175 Difference]: Start difference. First operand has 67 places, 96 transitions, 743 flow. Second operand 4 states and 75 transitions. [2024-11-16 19:26:00,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 137 transitions, 1282 flow [2024-11-16 19:26:00,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 137 transitions, 1243 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-11-16 19:26:00,186 INFO L231 Difference]: Finished difference. Result has 70 places, 101 transitions, 793 flow [2024-11-16 19:26:00,186 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=793, PETRI_PLACES=70, PETRI_TRANSITIONS=101} [2024-11-16 19:26:00,187 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 43 predicate places. [2024-11-16 19:26:00,187 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 101 transitions, 793 flow [2024-11-16 19:26:00,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:26:00,187 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:26:00,187 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:26:00,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-16 19:26:00,188 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:26:00,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:26:00,188 INFO L85 PathProgramCache]: Analyzing trace with hash -264963118, now seen corresponding path program 2 times [2024-11-16 19:26:00,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:26:00,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694532781] [2024-11-16 19:26:00,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:26:00,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:26:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:26:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:26:00,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:26:00,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694532781] [2024-11-16 19:26:00,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694532781] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:26:00,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:26:00,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:26:00,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233639297] [2024-11-16 19:26:00,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:26:00,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:26:00,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:26:00,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:26:00,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:26:00,236 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-11-16 19:26:00,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 101 transitions, 793 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:26:00,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:26:00,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-11-16 19:26:00,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:26:00,475 INFO L124 PetriNetUnfolderBase]: 1025/1977 cut-off events. [2024-11-16 19:26:00,475 INFO L125 PetriNetUnfolderBase]: For 7043/7140 co-relation queries the response was YES. [2024-11-16 19:26:00,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7118 conditions, 1977 events. 1025/1977 cut-off events. For 7043/7140 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12453 event pairs, 145 based on Foata normal form. 13/1919 useless extension candidates. Maximal degree in co-relation 7093. Up to 789 conditions per place. [2024-11-16 19:26:00,490 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 109 selfloop transitions, 22 changer transitions 5/153 dead transitions. [2024-11-16 19:26:00,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 153 transitions, 1459 flow [2024-11-16 19:26:00,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:26:00,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:26:00,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-11-16 19:26:00,492 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5793103448275863 [2024-11-16 19:26:00,492 INFO L175 Difference]: Start difference. First operand has 70 places, 101 transitions, 793 flow. Second operand 5 states and 84 transitions. [2024-11-16 19:26:00,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 153 transitions, 1459 flow [2024-11-16 19:26:00,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 153 transitions, 1433 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-16 19:26:00,504 INFO L231 Difference]: Finished difference. Result has 74 places, 117 transitions, 1028 flow [2024-11-16 19:26:00,505 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1028, PETRI_PLACES=74, PETRI_TRANSITIONS=117} [2024-11-16 19:26:00,505 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 47 predicate places. [2024-11-16 19:26:00,505 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 117 transitions, 1028 flow [2024-11-16 19:26:00,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:26:00,506 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:26:00,506 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:26:00,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-16 19:26:00,506 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:26:00,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:26:00,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1683433178, now seen corresponding path program 2 times [2024-11-16 19:26:00,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:26:00,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045902568] [2024-11-16 19:26:00,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:26:00,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:26:00,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:26:00,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:26:00,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:26:00,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045902568] [2024-11-16 19:26:00,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045902568] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:26:00,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243122902] [2024-11-16 19:26:00,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:26:00,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:26:00,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:26:00,830 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) [2024-11-16 19:26:00,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 19:26:00,884 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:26:00,884 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:26:00,885 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-16 19:26:00,887 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:26:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:26:01,190 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:26:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:26:01,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243122902] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:26:01,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:26:01,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-16 19:26:01,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721908501] [2024-11-16 19:26:01,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:26:01,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-16 19:26:01,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:26:01,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-16 19:26:01,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2024-11-16 19:26:01,398 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 29 [2024-11-16 19:26:01,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 117 transitions, 1028 flow. Second operand has 13 states, 13 states have (on average 12.76923076923077) internal successors, (166), 13 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:26:01,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:26:01,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 29 [2024-11-16 19:26:01,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:26:02,349 INFO L124 PetriNetUnfolderBase]: 2024/4216 cut-off events. [2024-11-16 19:26:02,350 INFO L125 PetriNetUnfolderBase]: For 16260/16335 co-relation queries the response was YES. [2024-11-16 19:26:02,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15427 conditions, 4216 events. 2024/4216 cut-off events. For 16260/16335 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 31572 event pairs, 195 based on Foata normal form. 27/4182 useless extension candidates. Maximal degree in co-relation 15400. Up to 938 conditions per place. [2024-11-16 19:26:02,387 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 184 selfloop transitions, 123 changer transitions 8/326 dead transitions. [2024-11-16 19:26:02,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 326 transitions, 3333 flow [2024-11-16 19:26:02,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-16 19:26:02,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-16 19:26:02,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 224 transitions. [2024-11-16 19:26:02,389 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6436781609195402 [2024-11-16 19:26:02,390 INFO L175 Difference]: Start difference. First operand has 74 places, 117 transitions, 1028 flow. Second operand 12 states and 224 transitions. [2024-11-16 19:26:02,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 326 transitions, 3333 flow [2024-11-16 19:26:02,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 326 transitions, 3226 flow, removed 37 selfloop flow, removed 1 redundant places. [2024-11-16 19:26:02,420 INFO L231 Difference]: Finished difference. Result has 91 places, 207 transitions, 2442 flow [2024-11-16 19:26:02,421 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2442, PETRI_PLACES=91, PETRI_TRANSITIONS=207} [2024-11-16 19:26:02,423 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 64 predicate places. [2024-11-16 19:26:02,423 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 207 transitions, 2442 flow [2024-11-16 19:26:02,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.76923076923077) internal successors, (166), 13 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:26:02,423 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:26:02,424 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:26:02,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-16 19:26:02,628 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,SelfDestructingSolverStorable7 [2024-11-16 19:26:02,629 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:26:02,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:26:02,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1947407607, now seen corresponding path program 1 times [2024-11-16 19:26:02,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:26:02,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641381489] [2024-11-16 19:26:02,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:26:02,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:26:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:26:02,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:26:02,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:26:02,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641381489] [2024-11-16 19:26:02,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641381489] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:26:02,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138215704] [2024-11-16 19:26:02,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:26:02,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:26:02,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:26:02,863 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) [2024-11-16 19:26:02,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 19:26:02,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:26:02,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-16 19:26:02,938 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:26:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:26:03,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:26:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:26:03,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138215704] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:26:03,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:26:03,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 12 [2024-11-16 19:26:03,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701379969] [2024-11-16 19:26:03,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:26:03,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-16 19:26:03,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:26:03,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-16 19:26:03,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-16 19:26:03,612 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 29 [2024-11-16 19:26:03,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 207 transitions, 2442 flow. Second operand has 13 states, 13 states have (on average 12.538461538461538) internal successors, (163), 13 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:26:03,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:26:03,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 29 [2024-11-16 19:26:03,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:26:09,383 INFO L124 PetriNetUnfolderBase]: 3897/8031 cut-off events. [2024-11-16 19:26:09,383 INFO L125 PetriNetUnfolderBase]: For 46416/46589 co-relation queries the response was YES. [2024-11-16 19:26:09,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33252 conditions, 8031 events. 3897/8031 cut-off events. For 46416/46589 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 62519 event pairs, 494 based on Foata normal form. 39/8061 useless extension candidates. Maximal degree in co-relation 33218. Up to 3556 conditions per place. [2024-11-16 19:26:09,447 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 320 selfloop transitions, 193 changer transitions 6/530 dead transitions. [2024-11-16 19:26:09,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 530 transitions, 6894 flow [2024-11-16 19:26:09,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-16 19:26:09,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-16 19:26:09,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 264 transitions. [2024-11-16 19:26:09,449 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2024-11-16 19:26:09,449 INFO L175 Difference]: Start difference. First operand has 91 places, 207 transitions, 2442 flow. Second operand 14 states and 264 transitions. [2024-11-16 19:26:09,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 530 transitions, 6894 flow [2024-11-16 19:26:09,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 530 transitions, 6556 flow, removed 158 selfloop flow, removed 5 redundant places. [2024-11-16 19:26:09,529 INFO L231 Difference]: Finished difference. Result has 109 places, 389 transitions, 5411 flow [2024-11-16 19:26:09,530 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2294, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5411, PETRI_PLACES=109, PETRI_TRANSITIONS=389} [2024-11-16 19:26:09,530 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 82 predicate places. [2024-11-16 19:26:09,530 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 389 transitions, 5411 flow [2024-11-16 19:26:09,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.538461538461538) internal successors, (163), 13 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:26:09,531 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:26:09,531 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:26:09,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-16 19:26:09,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:26:09,732 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:26:09,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:26:09,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1685499632, now seen corresponding path program 3 times [2024-11-16 19:26:09,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:26:09,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539261305] [2024-11-16 19:26:09,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:26:09,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:26:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:26:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:26:09,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:26:09,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539261305] [2024-11-16 19:26:09,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539261305] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:26:09,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419502115] [2024-11-16 19:26:09,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:26:09,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:26:09,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:26:09,845 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) [2024-11-16 19:26:09,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 19:26:09,898 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-16 19:26:09,898 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:26:09,899 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 19:26:09,900 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:26:10,036 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:26:10,036 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:26:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:26:10,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419502115] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:26:10,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:26:10,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-16 19:26:10,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213930840] [2024-11-16 19:26:10,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:26:10,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-16 19:26:10,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:26:10,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-16 19:26:10,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-11-16 19:26:10,108 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-11-16 19:26:10,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 389 transitions, 5411 flow. Second operand has 14 states, 14 states have (on average 12.0) internal successors, (168), 14 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:26:10,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:26:10,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-11-16 19:26:10,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:26:14,402 INFO L124 PetriNetUnfolderBase]: 12006/23971 cut-off events. [2024-11-16 19:26:14,402 INFO L125 PetriNetUnfolderBase]: For 171883/172835 co-relation queries the response was YES. [2024-11-16 19:26:14,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103406 conditions, 23971 events. 12006/23971 cut-off events. For 171883/172835 co-relation queries the response was YES. Maximal size of possible extension queue 989. Compared 220424 event pairs, 1468 based on Foata normal form. 836/24788 useless extension candidates. Maximal degree in co-relation 103363. Up to 4816 conditions per place. [2024-11-16 19:26:14,609 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 782 selfloop transitions, 581 changer transitions 0/1394 dead transitions. [2024-11-16 19:26:14,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 1394 transitions, 21300 flow [2024-11-16 19:26:14,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-16 19:26:14,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-16 19:26:14,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 331 transitions. [2024-11-16 19:26:14,611 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6007259528130672 [2024-11-16 19:26:14,611 INFO L175 Difference]: Start difference. First operand has 109 places, 389 transitions, 5411 flow. Second operand 19 states and 331 transitions. [2024-11-16 19:26:14,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 1394 transitions, 21300 flow [2024-11-16 19:26:15,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 1394 transitions, 21196 flow, removed 45 selfloop flow, removed 2 redundant places. [2024-11-16 19:26:15,168 INFO L231 Difference]: Finished difference. Result has 138 places, 965 transitions, 16643 flow [2024-11-16 19:26:15,169 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5346, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=16643, PETRI_PLACES=138, PETRI_TRANSITIONS=965} [2024-11-16 19:26:15,169 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 111 predicate places. [2024-11-16 19:26:15,169 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 965 transitions, 16643 flow [2024-11-16 19:26:15,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.0) internal successors, (168), 14 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:26:15,170 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:26:15,170 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:26:15,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-16 19:26:15,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:26:15,370 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:26:15,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:26:15,371 INFO L85 PathProgramCache]: Analyzing trace with hash -510140774, now seen corresponding path program 2 times [2024-11-16 19:26:15,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:26:15,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959946848] [2024-11-16 19:26:15,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:26:15,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:26:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:26:15,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:26:15,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:26:15,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959946848] [2024-11-16 19:26:15,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959946848] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:26:15,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815244999] [2024-11-16 19:26:15,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:26:15,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:26:15,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:26:15,448 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) [2024-11-16 19:26:15,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 19:26:15,494 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:26:15,494 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:26:15,495 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-16 19:26:15,496 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:26:15,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:26:15,600 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:26:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:26:15,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815244999] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:26:15,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:26:15,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-16 19:26:15,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951876205] [2024-11-16 19:26:15,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:26:15,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-16 19:26:15,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:26:15,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-16 19:26:15,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-16 19:26:15,652 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-11-16 19:26:15,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 965 transitions, 16643 flow. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:26:15,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:26:15,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-11-16 19:26:15,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:26:23,129 INFO L124 PetriNetUnfolderBase]: 16915/33067 cut-off events. [2024-11-16 19:26:23,129 INFO L125 PetriNetUnfolderBase]: For 487833/490400 co-relation queries the response was YES. [2024-11-16 19:26:23,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180320 conditions, 33067 events. 16915/33067 cut-off events. For 487833/490400 co-relation queries the response was YES. Maximal size of possible extension queue 1395. Compared 314829 event pairs, 945 based on Foata normal form. 1783/34590 useless extension candidates. Maximal degree in co-relation 180264. Up to 8413 conditions per place. [2024-11-16 19:26:23,732 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 1057 selfloop transitions, 509 changer transitions 16/1613 dead transitions. [2024-11-16 19:26:23,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 1613 transitions, 29889 flow [2024-11-16 19:26:23,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-16 19:26:23,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-16 19:26:23,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2024-11-16 19:26:23,734 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5747126436781609 [2024-11-16 19:26:23,734 INFO L175 Difference]: Start difference. First operand has 138 places, 965 transitions, 16643 flow. Second operand 12 states and 200 transitions. [2024-11-16 19:26:23,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 1613 transitions, 29889 flow [2024-11-16 19:26:25,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 1613 transitions, 28614 flow, removed 634 selfloop flow, removed 2 redundant places. [2024-11-16 19:26:25,711 INFO L231 Difference]: Finished difference. Result has 154 places, 1255 transitions, 23373 flow [2024-11-16 19:26:25,712 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=15889, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=965, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=23373, PETRI_PLACES=154, PETRI_TRANSITIONS=1255} [2024-11-16 19:26:25,712 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 127 predicate places. [2024-11-16 19:26:25,713 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 1255 transitions, 23373 flow [2024-11-16 19:26:25,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:26:25,713 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:26:25,713 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:26:25,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-16 19:26:25,913 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,SelfDestructingSolverStorable10 [2024-11-16 19:26:25,914 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:26:25,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:26:25,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1689147582, now seen corresponding path program 3 times [2024-11-16 19:26:25,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:26:25,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143838317] [2024-11-16 19:26:25,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:26:25,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:26:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:26:25,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 19:26:25,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:26:25,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143838317] [2024-11-16 19:26:25,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143838317] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:26:25,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271186822] [2024-11-16 19:26:25,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:26:25,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:26:25,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:26:25,968 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) [2024-11-16 19:26:25,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 19:26:26,037 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-16 19:26:26,038 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:26:26,039 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-16 19:26:26,042 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:26:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:26:26,134 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:26:26,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 19:26:26,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271186822] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:26:26,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:26:26,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2024-11-16 19:26:26,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333566263] [2024-11-16 19:26:26,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:26:26,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-16 19:26:26,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:26:26,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-16 19:26:26,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-16 19:26:26,176 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-11-16 19:26:26,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 1255 transitions, 23373 flow. Second operand has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:26:26,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:26:26,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-11-16 19:26:26,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:26:36,985 INFO L124 PetriNetUnfolderBase]: 20575/40352 cut-off events. [2024-11-16 19:26:36,985 INFO L125 PetriNetUnfolderBase]: For 743970/748281 co-relation queries the response was YES. [2024-11-16 19:26:37,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238088 conditions, 40352 events. 20575/40352 cut-off events. For 743970/748281 co-relation queries the response was YES. Maximal size of possible extension queue 1863. Compared 399847 event pairs, 1215 based on Foata normal form. 3266/43544 useless extension candidates. Maximal degree in co-relation 238025. Up to 12114 conditions per place. [2024-11-16 19:26:37,454 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 1328 selfloop transitions, 529 changer transitions 0/1888 dead transitions. [2024-11-16 19:26:37,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 1888 transitions, 36716 flow [2024-11-16 19:26:37,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-16 19:26:37,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-16 19:26:37,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 238 transitions. [2024-11-16 19:26:37,456 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5471264367816092 [2024-11-16 19:26:37,456 INFO L175 Difference]: Start difference. First operand has 154 places, 1255 transitions, 23373 flow. Second operand 15 states and 238 transitions. [2024-11-16 19:26:37,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 1888 transitions, 36716 flow [2024-11-16 19:26:42,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 1888 transitions, 35648 flow, removed 529 selfloop flow, removed 2 redundant places. [2024-11-16 19:26:42,888 INFO L231 Difference]: Finished difference. Result has 170 places, 1470 transitions, 28685 flow [2024-11-16 19:26:42,889 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=22710, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=356, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=838, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=28685, PETRI_PLACES=170, PETRI_TRANSITIONS=1470} [2024-11-16 19:26:42,890 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 143 predicate places. [2024-11-16 19:26:42,890 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 1470 transitions, 28685 flow [2024-11-16 19:26:42,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:26:42,890 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:26:42,890 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:26:42,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-16 19:26:43,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:26:43,091 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:26:43,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:26:43,092 INFO L85 PathProgramCache]: Analyzing trace with hash -161351580, now seen corresponding path program 4 times [2024-11-16 19:26:43,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:26:43,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641544865] [2024-11-16 19:26:43,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:26:43,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:26:43,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:26:43,510 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:26:43,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:26:43,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641544865] [2024-11-16 19:26:43,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641544865] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:26:43,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966874427] [2024-11-16 19:26:43,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 19:26:43,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:26:43,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:26:43,512 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) [2024-11-16 19:26:43,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-16 19:26:43,578 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 19:26:43,578 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:26:43,579 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-16 19:26:43,581 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:26:48,041 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:26:48,041 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:26:48,489 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 19:26:48,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966874427] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:26:48,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:26:48,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 16 [2024-11-16 19:26:48,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081421729] [2024-11-16 19:26:48,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:26:48,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-16 19:26:48,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:26:48,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-16 19:26:48,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=209, Unknown=1, NotChecked=0, Total=272 [2024-11-16 19:26:50,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-16 19:26:50,589 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 29 [2024-11-16 19:26:50,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 1470 transitions, 28685 flow. Second operand has 17 states, 17 states have (on average 11.647058823529411) internal successors, (198), 17 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:26:50,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:26:50,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 29 [2024-11-16 19:26:50,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:26:57,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-16 19:27:01,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-16 19:27:06,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-16 19:27:11,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-16 19:27:16,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []