./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/mult-comm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.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/mult-comm.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 de93f11842753a9f5cde98724d1851736862f745073786263bfd177abe6c2376 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 17:30:49,378 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 17:30:49,434 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 17:30:49,440 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 17:30:49,444 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 17:30:49,463 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 17:30:49,464 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 17:30:49,464 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 17:30:49,465 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 17:30:49,465 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 17:30:49,465 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 17:30:49,465 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 17:30:49,465 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 17:30:49,466 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 17:30:49,466 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 17:30:49,466 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 17:30:49,466 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 17:30:49,467 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 17:30:49,467 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 17:30:49,467 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 17:30:49,467 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 17:30:49,467 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 17:30:49,467 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 17:30:49,467 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 17:30:49,467 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 17:30:49,467 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 17:30:49,467 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 17:30:49,467 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 17:30:49,467 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 17:30:49,467 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 17:30:49,467 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 17:30:49,467 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 17:30:49,467 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:30:49,467 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 17:30:49,468 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 17:30:49,468 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 17:30:49,468 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 17:30:49,468 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 17:30:49,468 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 17:30:49,468 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 17:30:49,468 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 17:30:49,468 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 17:30:49,468 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 17:30:49,468 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> de93f11842753a9f5cde98724d1851736862f745073786263bfd177abe6c2376 [2025-03-08 17:30:49,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 17:30:49,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 17:30:49,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 17:30:49,681 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 17:30:49,681 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 17:30:49,682 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/mult-comm.wvr.c [2025-03-08 17:30:50,783 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/192b0bb7d/c9f81bc79bf14a8aaa3c416d3a0a3b16/FLAGc298d129f [2025-03-08 17:30:50,970 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 17:30:50,970 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/mult-comm.wvr.c [2025-03-08 17:30:50,976 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/192b0bb7d/c9f81bc79bf14a8aaa3c416d3a0a3b16/FLAGc298d129f [2025-03-08 17:30:51,009 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/192b0bb7d/c9f81bc79bf14a8aaa3c416d3a0a3b16 [2025-03-08 17:30:51,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 17:30:51,016 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 17:30:51,017 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 17:30:51,018 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 17:30:51,021 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 17:30:51,022 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:30:51" (1/1) ... [2025-03-08 17:30:51,022 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@573f82b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:30:51, skipping insertion in model container [2025-03-08 17:30:51,024 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:30:51" (1/1) ... [2025-03-08 17:30:51,035 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 17:30:51,142 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/mult-comm.wvr.c[1936,1949] [2025-03-08 17:30:51,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:30:51,152 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 17:30:51,163 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/mult-comm.wvr.c[1936,1949] [2025-03-08 17:30:51,166 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:30:51,179 INFO L204 MainTranslator]: Completed translation [2025-03-08 17:30:51,179 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:30:51 WrapperNode [2025-03-08 17:30:51,180 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 17:30:51,181 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 17:30:51,181 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 17:30:51,181 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 17:30:51,185 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:30:51" (1/1) ... [2025-03-08 17:30:51,191 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:30:51" (1/1) ... [2025-03-08 17:30:51,201 INFO L138 Inliner]: procedures = 20, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 41 [2025-03-08 17:30:51,202 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 17:30:51,202 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 17:30:51,203 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 17:30:51,203 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 17:30:51,207 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:30:51" (1/1) ... [2025-03-08 17:30:51,208 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:30:51" (1/1) ... [2025-03-08 17:30:51,209 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:30:51" (1/1) ... [2025-03-08 17:30:51,222 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]. [2025-03-08 17:30:51,223 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:30:51" (1/1) ... [2025-03-08 17:30:51,223 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:30:51" (1/1) ... [2025-03-08 17:30:51,227 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:30:51" (1/1) ... [2025-03-08 17:30:51,227 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:30:51" (1/1) ... [2025-03-08 17:30:51,230 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:30:51" (1/1) ... [2025-03-08 17:30:51,231 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:30:51" (1/1) ... [2025-03-08 17:30:51,232 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 17:30:51,232 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 17:30:51,232 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 17:30:51,232 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 17:30:51,233 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:30:51" (1/1) ... [2025-03-08 17:30:51,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:30:51,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:51,260 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) [2025-03-08 17:30:51,264 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 [2025-03-08 17:30:51,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 17:30:51,280 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-08 17:30:51,280 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-08 17:30:51,280 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-08 17:30:51,280 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-08 17:30:51,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 17:30:51,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 17:30:51,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 17:30:51,281 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-08 17:30:51,348 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 17:30:51,350 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 17:30:51,482 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 17:30:51,482 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 17:30:51,555 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 17:30:51,555 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 17:30:51,556 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:30:51 BoogieIcfgContainer [2025-03-08 17:30:51,556 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 17:30:51,557 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 17:30:51,557 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 17:30:51,560 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 17:30:51,561 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:30:51" (1/3) ... [2025-03-08 17:30:51,561 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a7dd5f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:30:51, skipping insertion in model container [2025-03-08 17:30:51,561 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:30:51" (2/3) ... [2025-03-08 17:30:51,562 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a7dd5f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:30:51, skipping insertion in model container [2025-03-08 17:30:51,563 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:30:51" (3/3) ... [2025-03-08 17:30:51,564 INFO L128 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2025-03-08 17:30:51,574 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 17:30:51,575 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG mult-comm.wvr.c that has 3 procedures, 17 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-03-08 17:30:51,575 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 17:30:51,612 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-08 17:30:51,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 23 places, 18 transitions, 50 flow [2025-03-08 17:30:51,658 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2025-03-08 17:30:51,660 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-08 17:30:51,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25 conditions, 16 events. 2/16 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2025-03-08 17:30:51,662 INFO L82 GeneralOperation]: Start removeDead. Operand has 23 places, 18 transitions, 50 flow [2025-03-08 17:30:51,665 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 15 transitions, 42 flow [2025-03-08 17:30:51,670 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:30:51,678 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;@4791d854, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:30:51,679 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-08 17:30:51,685 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:30:51,685 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2025-03-08 17:30:51,685 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-08 17:30:51,686 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:51,687 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:51,687 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:51,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:51,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1725546108, now seen corresponding path program 1 times [2025-03-08 17:30:51,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:51,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060715116] [2025-03-08 17:30:51,697 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:30:51,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:51,747 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-08 17:30:51,773 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-08 17:30:51,774 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:30:51,774 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:51,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:30:51,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:51,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060715116] [2025-03-08 17:30:51,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060715116] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:30:51,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:30:51,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 17:30:51,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856809346] [2025-03-08 17:30:51,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:30:52,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:30:52,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:52,040 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:30:52,041 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:30:52,042 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-08 17:30:52,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:52,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:52,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-08 17:30:52,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:52,109 INFO L124 PetriNetUnfolderBase]: 68/123 cut-off events. [2025-03-08 17:30:52,109 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2025-03-08 17:30:52,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 123 events. 68/123 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 325 event pairs, 22 based on Foata normal form. 1/94 useless extension candidates. Maximal degree in co-relation 220. Up to 72 conditions per place. [2025-03-08 17:30:52,111 INFO L140 encePairwiseOnDemand]: 14/18 looper letters, 21 selfloop transitions, 3 changer transitions 1/26 dead transitions. [2025-03-08 17:30:52,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 26 transitions, 123 flow [2025-03-08 17:30:52,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:30:52,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:30:52,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 35 transitions. [2025-03-08 17:30:52,120 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2025-03-08 17:30:52,124 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 35 transitions. [2025-03-08 17:30:52,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 26 transitions, 123 flow [2025-03-08 17:30:52,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 26 transitions, 109 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-08 17:30:52,129 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 53 flow [2025-03-08 17:30:52,131 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2025-03-08 17:30:52,133 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2025-03-08 17:30:52,133 INFO L471 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 53 flow [2025-03-08 17:30:52,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:52,133 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:52,133 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:52,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 17:30:52,133 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:52,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:52,134 INFO L85 PathProgramCache]: Analyzing trace with hash 636477668, now seen corresponding path program 1 times [2025-03-08 17:30:52,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:52,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430282037] [2025-03-08 17:30:52,134 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:30:52,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:52,142 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-08 17:30:52,160 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 17:30:52,160 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:30:52,160 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:30:52,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:52,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430282037] [2025-03-08 17:30:52,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430282037] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:52,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523857251] [2025-03-08 17:30:52,332 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:30:52,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:52,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:52,335 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) [2025-03-08 17:30:52,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 17:30:52,375 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-08 17:30:52,391 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 17:30:52,391 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:30:52,391 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:52,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 17:30:52,396 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:30:52,506 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:52,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:30:52,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523857251] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:52,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:52,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2025-03-08 17:30:52,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309576606] [2025-03-08 17:30:52,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:52,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 17:30:52,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:52,694 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 17:30:52,694 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2025-03-08 17:30:52,694 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-08 17:30:52,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 53 flow. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:52,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:52,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-08 17:30:52,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:52,834 INFO L124 PetriNetUnfolderBase]: 70/131 cut-off events. [2025-03-08 17:30:52,834 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-03-08 17:30:52,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 131 events. 70/131 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 354 event pairs, 12 based on Foata normal form. 1/132 useless extension candidates. Maximal degree in co-relation 104. Up to 70 conditions per place. [2025-03-08 17:30:52,835 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 23 selfloop transitions, 5 changer transitions 12/41 dead transitions. [2025-03-08 17:30:52,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 41 transitions, 196 flow [2025-03-08 17:30:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:30:52,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:30:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 59 transitions. [2025-03-08 17:30:52,840 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5462962962962963 [2025-03-08 17:30:52,840 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 53 flow. Second operand 6 states and 59 transitions. [2025-03-08 17:30:52,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 41 transitions, 196 flow [2025-03-08 17:30:52,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 41 transitions, 191 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-08 17:30:52,842 INFO L231 Difference]: Finished difference. Result has 26 places, 19 transitions, 78 flow [2025-03-08 17:30:52,842 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=78, PETRI_PLACES=26, PETRI_TRANSITIONS=19} [2025-03-08 17:30:52,842 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 6 predicate places. [2025-03-08 17:30:52,842 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 19 transitions, 78 flow [2025-03-08 17:30:52,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:52,842 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:52,842 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:52,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 17:30:53,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:53,043 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:53,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:53,044 INFO L85 PathProgramCache]: Analyzing trace with hash 128129390, now seen corresponding path program 2 times [2025-03-08 17:30:53,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:53,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463116520] [2025-03-08 17:30:53,044 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:30:53,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:53,050 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-03-08 17:30:53,059 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 17:30:53,060 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:30:53,060 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:53,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:30:53,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:53,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463116520] [2025-03-08 17:30:53,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463116520] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:53,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960739694] [2025-03-08 17:30:53,240 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:30:53,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:53,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:53,243 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) [2025-03-08 17:30:53,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 17:30:53,273 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-03-08 17:30:53,283 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 17:30:53,283 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:30:53,283 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:53,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 17:30:53,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:53,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:30:53,393 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:53,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:30:53,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960739694] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:53,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:53,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 13 [2025-03-08 17:30:53,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008560501] [2025-03-08 17:30:53,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:53,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 17:30:53,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:53,506 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 17:30:53,507 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2025-03-08 17:30:53,507 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-08 17:30:53,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 19 transitions, 78 flow. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:53,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:53,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-08 17:30:53,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:53,670 INFO L124 PetriNetUnfolderBase]: 113/210 cut-off events. [2025-03-08 17:30:53,670 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2025-03-08 17:30:53,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 210 events. 113/210 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 694 event pairs, 11 based on Foata normal form. 3/213 useless extension candidates. Maximal degree in co-relation 555. Up to 87 conditions per place. [2025-03-08 17:30:53,672 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 38 selfloop transitions, 20 changer transitions 9/68 dead transitions. [2025-03-08 17:30:53,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 68 transitions, 363 flow [2025-03-08 17:30:53,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 17:30:53,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-08 17:30:53,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 102 transitions. [2025-03-08 17:30:53,673 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2025-03-08 17:30:53,673 INFO L175 Difference]: Start difference. First operand has 26 places, 19 transitions, 78 flow. Second operand 11 states and 102 transitions. [2025-03-08 17:30:53,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 68 transitions, 363 flow [2025-03-08 17:30:53,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 68 transitions, 341 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-03-08 17:30:53,675 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 201 flow [2025-03-08 17:30:53,675 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=201, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2025-03-08 17:30:53,676 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2025-03-08 17:30:53,676 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 201 flow [2025-03-08 17:30:53,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:53,676 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:53,676 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:53,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 17:30:53,876 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,SelfDestructingSolverStorable2 [2025-03-08 17:30:53,877 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:53,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:53,877 INFO L85 PathProgramCache]: Analyzing trace with hash 585820004, now seen corresponding path program 1 times [2025-03-08 17:30:53,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:53,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863133254] [2025-03-08 17:30:53,877 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:30:53,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:53,881 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-08 17:30:53,886 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 17:30:53,886 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:30:53,886 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:30:53,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:53,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863133254] [2025-03-08 17:30:53,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863133254] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:53,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561011350] [2025-03-08 17:30:53,975 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:30:53,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:53,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:53,977 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) [2025-03-08 17:30:53,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 17:30:54,018 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-08 17:30:54,038 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 17:30:54,038 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:30:54,038 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:54,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 17:30:54,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:30:54,118 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:30:54,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561011350] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:54,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:54,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2025-03-08 17:30:54,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293383357] [2025-03-08 17:30:54,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:54,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 17:30:54,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:54,240 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 17:30:54,240 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2025-03-08 17:30:54,240 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-08 17:30:54,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 201 flow. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:54,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:54,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-08 17:30:54,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:54,342 INFO L124 PetriNetUnfolderBase]: 117/221 cut-off events. [2025-03-08 17:30:54,342 INFO L125 PetriNetUnfolderBase]: For 247/247 co-relation queries the response was YES. [2025-03-08 17:30:54,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 221 events. 117/221 cut-off events. For 247/247 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 766 event pairs, 19 based on Foata normal form. 1/222 useless extension candidates. Maximal degree in co-relation 740. Up to 171 conditions per place. [2025-03-08 17:30:54,344 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 33 selfloop transitions, 6 changer transitions 12/52 dead transitions. [2025-03-08 17:30:54,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 52 transitions, 367 flow [2025-03-08 17:30:54,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:30:54,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:30:54,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 57 transitions. [2025-03-08 17:30:54,345 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2025-03-08 17:30:54,345 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 201 flow. Second operand 6 states and 57 transitions. [2025-03-08 17:30:54,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 52 transitions, 367 flow [2025-03-08 17:30:54,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 52 transitions, 315 flow, removed 20 selfloop flow, removed 3 redundant places. [2025-03-08 17:30:54,350 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 162 flow [2025-03-08 17:30:54,350 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=162, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2025-03-08 17:30:54,351 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2025-03-08 17:30:54,351 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 162 flow [2025-03-08 17:30:54,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:54,351 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:54,351 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:54,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 17:30:54,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:54,552 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:54,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:54,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1071261544, now seen corresponding path program 2 times [2025-03-08 17:30:54,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:54,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123100014] [2025-03-08 17:30:54,552 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:30:54,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:54,556 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-03-08 17:30:54,561 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 17:30:54,562 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:30:54,562 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:54,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:30:54,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:54,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123100014] [2025-03-08 17:30:54,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123100014] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:54,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954834266] [2025-03-08 17:30:54,690 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:30:54,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:54,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:54,694 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) [2025-03-08 17:30:54,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 17:30:54,722 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-03-08 17:30:54,738 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 17:30:54,738 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:30:54,738 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:54,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 17:30:54,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:30:54,787 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:54,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:30:54,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954834266] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:54,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:54,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2025-03-08 17:30:54,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185700764] [2025-03-08 17:30:54,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:54,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 17:30:54,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:54,899 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 17:30:54,899 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2025-03-08 17:30:54,900 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-08 17:30:54,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 162 flow. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:54,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:54,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-08 17:30:54,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:54,994 INFO L124 PetriNetUnfolderBase]: 131/242 cut-off events. [2025-03-08 17:30:54,994 INFO L125 PetriNetUnfolderBase]: For 254/254 co-relation queries the response was YES. [2025-03-08 17:30:54,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 242 events. 131/242 cut-off events. For 254/254 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 818 event pairs, 21 based on Foata normal form. 2/242 useless extension candidates. Maximal degree in co-relation 744. Up to 185 conditions per place. [2025-03-08 17:30:54,996 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 41 selfloop transitions, 14 changer transitions 4/60 dead transitions. [2025-03-08 17:30:54,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 60 transitions, 383 flow [2025-03-08 17:30:54,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 17:30:54,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-08 17:30:54,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 72 transitions. [2025-03-08 17:30:54,999 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-03-08 17:30:54,999 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 162 flow. Second operand 8 states and 72 transitions. [2025-03-08 17:30:54,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 60 transitions, 383 flow [2025-03-08 17:30:55,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 60 transitions, 369 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-03-08 17:30:55,001 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 222 flow [2025-03-08 17:30:55,001 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=222, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2025-03-08 17:30:55,001 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 24 predicate places. [2025-03-08 17:30:55,003 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 222 flow [2025-03-08 17:30:55,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:55,003 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:55,003 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:55,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-08 17:30:55,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:55,204 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:55,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:55,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1816214116, now seen corresponding path program 3 times [2025-03-08 17:30:55,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:55,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344965138] [2025-03-08 17:30:55,204 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:30:55,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:55,208 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 14 statements into 2 equivalence classes. [2025-03-08 17:30:55,214 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 17:30:55,214 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:30:55,214 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:30:55,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:55,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344965138] [2025-03-08 17:30:55,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344965138] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:55,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794875591] [2025-03-08 17:30:55,338 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:30:55,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:55,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:55,340 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) [2025-03-08 17:30:55,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 17:30:55,369 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 14 statements into 2 equivalence classes. [2025-03-08 17:30:55,379 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 17:30:55,379 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:30:55,379 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:55,379 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 17:30:55,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:55,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:30:55,458 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:30:55,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794875591] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:55,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:55,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 12 [2025-03-08 17:30:55,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2874417] [2025-03-08 17:30:55,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:55,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 17:30:55,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:55,603 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 17:30:55,603 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2025-03-08 17:30:55,603 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-08 17:30:55,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 222 flow. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:55,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:55,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-08 17:30:55,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:55,747 INFO L124 PetriNetUnfolderBase]: 148/270 cut-off events. [2025-03-08 17:30:55,747 INFO L125 PetriNetUnfolderBase]: For 397/397 co-relation queries the response was YES. [2025-03-08 17:30:55,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 270 events. 148/270 cut-off events. For 397/397 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 960 event pairs, 26 based on Foata normal form. 2/268 useless extension candidates. Maximal degree in co-relation 898. Up to 211 conditions per place. [2025-03-08 17:30:55,750 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 46 selfloop transitions, 17 changer transitions 6/70 dead transitions. [2025-03-08 17:30:55,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 70 transitions, 485 flow [2025-03-08 17:30:55,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 17:30:55,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-08 17:30:55,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 78 transitions. [2025-03-08 17:30:55,752 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2025-03-08 17:30:55,754 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 222 flow. Second operand 9 states and 78 transitions. [2025-03-08 17:30:55,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 70 transitions, 485 flow [2025-03-08 17:30:55,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 437 flow, removed 15 selfloop flow, removed 3 redundant places. [2025-03-08 17:30:55,759 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 307 flow [2025-03-08 17:30:55,759 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=307, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2025-03-08 17:30:55,760 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 33 predicate places. [2025-03-08 17:30:55,760 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 307 flow [2025-03-08 17:30:55,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:55,760 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:55,760 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:55,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-08 17:30:55,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:55,961 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:55,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:55,961 INFO L85 PathProgramCache]: Analyzing trace with hash -291711752, now seen corresponding path program 3 times [2025-03-08 17:30:55,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:55,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300887076] [2025-03-08 17:30:55,962 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:30:55,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:55,964 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 14 statements into 2 equivalence classes. [2025-03-08 17:30:55,971 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 17:30:55,971 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:30:55,971 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:56,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:30:56,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:56,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300887076] [2025-03-08 17:30:56,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300887076] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:56,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118158114] [2025-03-08 17:30:56,085 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:30:56,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:56,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:56,087 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) [2025-03-08 17:30:56,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 17:30:56,112 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 14 statements into 2 equivalence classes. [2025-03-08 17:30:56,121 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 17:30:56,121 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:30:56,121 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:56,122 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-08 17:30:56,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:30:56,179 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:30:56,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118158114] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:56,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:56,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 10 [2025-03-08 17:30:56,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956176300] [2025-03-08 17:30:56,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:56,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 17:30:56,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:56,243 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 17:30:56,243 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2025-03-08 17:30:56,244 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-08 17:30:56,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 307 flow. Second operand has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:56,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:56,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-08 17:30:56,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:56,375 INFO L124 PetriNetUnfolderBase]: 186/341 cut-off events. [2025-03-08 17:30:56,375 INFO L125 PetriNetUnfolderBase]: For 735/735 co-relation queries the response was YES. [2025-03-08 17:30:56,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1270 conditions, 341 events. 186/341 cut-off events. For 735/735 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1311 event pairs, 36 based on Foata normal form. 3/340 useless extension candidates. Maximal degree in co-relation 1213. Up to 240 conditions per place. [2025-03-08 17:30:56,378 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 55 selfloop transitions, 22 changer transitions 7/85 dead transitions. [2025-03-08 17:30:56,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 85 transitions, 654 flow [2025-03-08 17:30:56,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 17:30:56,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-08 17:30:56,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 87 transitions. [2025-03-08 17:30:56,380 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2025-03-08 17:30:56,380 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 307 flow. Second operand 10 states and 87 transitions. [2025-03-08 17:30:56,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 85 transitions, 654 flow [2025-03-08 17:30:56,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 85 transitions, 603 flow, removed 18 selfloop flow, removed 3 redundant places. [2025-03-08 17:30:56,385 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 406 flow [2025-03-08 17:30:56,385 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=406, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2025-03-08 17:30:56,387 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 42 predicate places. [2025-03-08 17:30:56,387 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 406 flow [2025-03-08 17:30:56,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:56,387 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:56,387 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:56,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-08 17:30:56,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:56,588 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:56,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:56,589 INFO L85 PathProgramCache]: Analyzing trace with hash -300741840, now seen corresponding path program 1 times [2025-03-08 17:30:56,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:56,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031892627] [2025-03-08 17:30:56,589 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:30:56,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:56,593 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 17:30:56,601 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:30:56,601 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:30:56,601 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:56,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:30:56,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:56,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031892627] [2025-03-08 17:30:56,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031892627] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:56,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384738014] [2025-03-08 17:30:56,866 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:30:56,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:56,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:56,868 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) [2025-03-08 17:30:56,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 17:30:56,896 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 17:30:56,916 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:30:56,916 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:30:56,916 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:56,917 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:30:56,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:57,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:30:57,108 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:30:57,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384738014] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:57,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:57,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-08 17:30:57,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165042655] [2025-03-08 17:30:57,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:57,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 17:30:57,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:57,465 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 17:30:57,465 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2025-03-08 17:30:57,465 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-08 17:30:57,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 406 flow. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:57,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:57,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-08 17:30:57,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:02,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-08 17:31:06,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-08 17:31:06,369 INFO L124 PetriNetUnfolderBase]: 256/488 cut-off events. [2025-03-08 17:31:06,369 INFO L125 PetriNetUnfolderBase]: For 965/965 co-relation queries the response was YES. [2025-03-08 17:31:06,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1828 conditions, 488 events. 256/488 cut-off events. For 965/965 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2224 event pairs, 23 based on Foata normal form. 3/487 useless extension candidates. Maximal degree in co-relation 1723. Up to 240 conditions per place. [2025-03-08 17:31:06,372 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 83 selfloop transitions, 52 changer transitions 30/166 dead transitions. [2025-03-08 17:31:06,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 166 transitions, 1199 flow [2025-03-08 17:31:06,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-08 17:31:06,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-08 17:31:06,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 199 transitions. [2025-03-08 17:31:06,374 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46064814814814814 [2025-03-08 17:31:06,374 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 406 flow. Second operand 24 states and 199 transitions. [2025-03-08 17:31:06,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 166 transitions, 1199 flow [2025-03-08 17:31:06,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 166 transitions, 1133 flow, removed 27 selfloop flow, removed 3 redundant places. [2025-03-08 17:31:06,383 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 661 flow [2025-03-08 17:31:06,383 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=661, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2025-03-08 17:31:06,383 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 72 predicate places. [2025-03-08 17:31:06,383 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 661 flow [2025-03-08 17:31:06,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:06,385 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:06,385 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:06,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-08 17:31:06,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:06,586 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:31:06,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:06,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1464587340, now seen corresponding path program 2 times [2025-03-08 17:31:06,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:06,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807603658] [2025-03-08 17:31:06,587 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:31:06,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:06,590 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:06,607 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:06,607 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:31:06,607 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:06,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:06,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:06,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807603658] [2025-03-08 17:31:06,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807603658] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:06,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708689589] [2025-03-08 17:31:06,876 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:31:06,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:06,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:06,878 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:06,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 17:31:06,904 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:06,979 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:06,979 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:31:06,979 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:06,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:31:06,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:07,126 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:07,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:07,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708689589] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:07,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:07,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2025-03-08 17:31:07,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736768383] [2025-03-08 17:31:07,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:07,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 17:31:07,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:07,377 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 17:31:07,377 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2025-03-08 17:31:07,377 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-08 17:31:07,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 661 flow. Second operand has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:07,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:07,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-08 17:31:07,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:08,412 INFO L124 PetriNetUnfolderBase]: 287/569 cut-off events. [2025-03-08 17:31:08,412 INFO L125 PetriNetUnfolderBase]: For 3058/3058 co-relation queries the response was YES. [2025-03-08 17:31:08,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2692 conditions, 569 events. 287/569 cut-off events. For 3058/3058 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2812 event pairs, 20 based on Foata normal form. 3/568 useless extension candidates. Maximal degree in co-relation 2551. Up to 242 conditions per place. [2025-03-08 17:31:08,416 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 88 selfloop transitions, 77 changer transitions 14/180 dead transitions. [2025-03-08 17:31:08,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 180 transitions, 1690 flow [2025-03-08 17:31:08,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-08 17:31:08,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-08 17:31:08,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 203 transitions. [2025-03-08 17:31:08,419 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4699074074074074 [2025-03-08 17:31:08,420 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 661 flow. Second operand 24 states and 203 transitions. [2025-03-08 17:31:08,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 180 transitions, 1690 flow [2025-03-08 17:31:08,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 180 transitions, 1483 flow, removed 83 selfloop flow, removed 12 redundant places. [2025-03-08 17:31:08,430 INFO L231 Difference]: Finished difference. Result has 111 places, 114 transitions, 1032 flow [2025-03-08 17:31:08,431 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1032, PETRI_PLACES=111, PETRI_TRANSITIONS=114} [2025-03-08 17:31:08,431 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 91 predicate places. [2025-03-08 17:31:08,431 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 114 transitions, 1032 flow [2025-03-08 17:31:08,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:08,431 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:08,431 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:08,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-08 17:31:08,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-03-08 17:31:08,632 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:31:08,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:08,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1519998600, now seen corresponding path program 3 times [2025-03-08 17:31:08,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:08,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763108417] [2025-03-08 17:31:08,632 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:31:08,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:08,635 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:08,649 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:08,649 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:31:08,650 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:08,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:08,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763108417] [2025-03-08 17:31:08,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763108417] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:08,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941063504] [2025-03-08 17:31:08,874 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:31:08,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:08,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:08,876 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:08,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 17:31:08,899 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:08,928 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:08,929 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:31:08,929 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:08,932 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:31:08,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:09,099 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:09,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941063504] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:09,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:09,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2025-03-08 17:31:09,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547148653] [2025-03-08 17:31:09,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:09,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 17:31:09,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:09,349 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 17:31:09,349 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2025-03-08 17:31:09,349 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-08 17:31:09,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 114 transitions, 1032 flow. Second operand has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:09,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:09,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-08 17:31:09,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:11,332 INFO L124 PetriNetUnfolderBase]: 280/547 cut-off events. [2025-03-08 17:31:11,333 INFO L125 PetriNetUnfolderBase]: For 4922/4922 co-relation queries the response was YES. [2025-03-08 17:31:11,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2955 conditions, 547 events. 280/547 cut-off events. For 4922/4922 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2631 event pairs, 20 based on Foata normal form. 3/544 useless extension candidates. Maximal degree in co-relation 2836. Up to 247 conditions per place. [2025-03-08 17:31:11,336 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 85 selfloop transitions, 81 changer transitions 14/181 dead transitions. [2025-03-08 17:31:11,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 181 transitions, 1762 flow [2025-03-08 17:31:11,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-08 17:31:11,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-03-08 17:31:11,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 209 transitions. [2025-03-08 17:31:11,338 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4465811965811966 [2025-03-08 17:31:11,338 INFO L175 Difference]: Start difference. First operand has 111 places, 114 transitions, 1032 flow. Second operand 26 states and 209 transitions. [2025-03-08 17:31:11,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 181 transitions, 1762 flow [2025-03-08 17:31:11,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 181 transitions, 1505 flow, removed 110 selfloop flow, removed 12 redundant places. [2025-03-08 17:31:11,349 INFO L231 Difference]: Finished difference. Result has 128 places, 122 transitions, 1141 flow [2025-03-08 17:31:11,350 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1141, PETRI_PLACES=128, PETRI_TRANSITIONS=122} [2025-03-08 17:31:11,350 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 108 predicate places. [2025-03-08 17:31:11,350 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 122 transitions, 1141 flow [2025-03-08 17:31:11,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:11,350 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:11,351 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:11,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-08 17:31:11,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-08 17:31:11,555 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:31:11,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:11,555 INFO L85 PathProgramCache]: Analyzing trace with hash 549858636, now seen corresponding path program 4 times [2025-03-08 17:31:11,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:11,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663363030] [2025-03-08 17:31:11,556 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:31:11,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:11,558 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:11,569 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:11,569 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:31:11,569 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:11,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:11,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:11,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663363030] [2025-03-08 17:31:11,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663363030] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:11,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51413058] [2025-03-08 17:31:11,784 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:31:11,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:11,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:11,786 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:11,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 17:31:11,809 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:11,828 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:11,828 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:31:11,828 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:11,829 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:31:11,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:11,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:11,987 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:17,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:17,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51413058] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:17,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:17,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-08 17:31:17,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010422258] [2025-03-08 17:31:17,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:17,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 17:31:17,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:17,023 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 17:31:17,023 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2025-03-08 17:31:17,023 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-08 17:31:17,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 122 transitions, 1141 flow. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:17,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:17,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-08 17:31:17,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:17,530 INFO L124 PetriNetUnfolderBase]: 325/625 cut-off events. [2025-03-08 17:31:17,530 INFO L125 PetriNetUnfolderBase]: For 6437/6437 co-relation queries the response was YES. [2025-03-08 17:31:17,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3472 conditions, 625 events. 325/625 cut-off events. For 6437/6437 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3071 event pairs, 36 based on Foata normal form. 3/614 useless extension candidates. Maximal degree in co-relation 3373. Up to 499 conditions per place. [2025-03-08 17:31:17,535 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 130 selfloop transitions, 37 changer transitions 14/182 dead transitions. [2025-03-08 17:31:17,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 182 transitions, 1983 flow [2025-03-08 17:31:17,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 17:31:17,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-08 17:31:17,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 131 transitions. [2025-03-08 17:31:17,537 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4548611111111111 [2025-03-08 17:31:17,537 INFO L175 Difference]: Start difference. First operand has 128 places, 122 transitions, 1141 flow. Second operand 16 states and 131 transitions. [2025-03-08 17:31:17,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 182 transitions, 1983 flow [2025-03-08 17:31:17,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 182 transitions, 1602 flow, removed 124 selfloop flow, removed 24 redundant places. [2025-03-08 17:31:17,554 INFO L231 Difference]: Finished difference. Result has 126 places, 143 transitions, 1255 flow [2025-03-08 17:31:17,554 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1255, PETRI_PLACES=126, PETRI_TRANSITIONS=143} [2025-03-08 17:31:17,555 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 106 predicate places. [2025-03-08 17:31:17,555 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 143 transitions, 1255 flow [2025-03-08 17:31:17,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:17,555 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:17,555 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:17,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-08 17:31:17,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-08 17:31:17,756 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:31:17,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:17,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1285563700, now seen corresponding path program 5 times [2025-03-08 17:31:17,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:17,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121159193] [2025-03-08 17:31:17,756 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:31:17,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:17,759 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:17,765 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:17,765 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:31:17,765 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:18,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:18,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:18,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121159193] [2025-03-08 17:31:18,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121159193] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:18,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385754303] [2025-03-08 17:31:18,039 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:31:18,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:18,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:18,041 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:18,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 17:31:18,062 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:18,078 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:18,078 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:31:18,078 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:18,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:31:18,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:18,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:18,373 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:19,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:19,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385754303] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:19,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:19,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-08 17:31:19,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457554274] [2025-03-08 17:31:19,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:19,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 17:31:19,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:19,916 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 17:31:19,916 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2025-03-08 17:31:19,916 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-08 17:31:19,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 143 transitions, 1255 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:19,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:19,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-08 17:31:19,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:21,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-08 17:31:23,485 INFO L124 PetriNetUnfolderBase]: 341/666 cut-off events. [2025-03-08 17:31:23,486 INFO L125 PetriNetUnfolderBase]: For 2280/2280 co-relation queries the response was YES. [2025-03-08 17:31:23,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3328 conditions, 666 events. 341/666 cut-off events. For 2280/2280 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3375 event pairs, 39 based on Foata normal form. 2/650 useless extension candidates. Maximal degree in co-relation 3237. Up to 505 conditions per place. [2025-03-08 17:31:23,490 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 129 selfloop transitions, 51 changer transitions 11/192 dead transitions. [2025-03-08 17:31:23,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 192 transitions, 1958 flow [2025-03-08 17:31:23,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-08 17:31:23,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-08 17:31:23,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 142 transitions. [2025-03-08 17:31:23,491 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4382716049382716 [2025-03-08 17:31:23,491 INFO L175 Difference]: Start difference. First operand has 126 places, 143 transitions, 1255 flow. Second operand 18 states and 142 transitions. [2025-03-08 17:31:23,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 192 transitions, 1958 flow [2025-03-08 17:31:23,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 192 transitions, 1855 flow, removed 46 selfloop flow, removed 3 redundant places. [2025-03-08 17:31:23,502 INFO L231 Difference]: Finished difference. Result has 142 places, 154 transitions, 1472 flow [2025-03-08 17:31:23,503 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1472, PETRI_PLACES=142, PETRI_TRANSITIONS=154} [2025-03-08 17:31:23,503 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 122 predicate places. [2025-03-08 17:31:23,503 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 154 transitions, 1472 flow [2025-03-08 17:31:23,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:23,503 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:23,503 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:23,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-08 17:31:23,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-08 17:31:23,704 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:31:23,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:23,705 INFO L85 PathProgramCache]: Analyzing trace with hash 2036012462, now seen corresponding path program 4 times [2025-03-08 17:31:23,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:23,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877833355] [2025-03-08 17:31:23,705 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:31:23,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:23,707 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:23,717 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:23,718 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:31:23,718 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:23,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:23,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:23,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877833355] [2025-03-08 17:31:23,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877833355] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:23,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204485590] [2025-03-08 17:31:23,822 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:31:23,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:23,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:23,824 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:23,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 17:31:23,847 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:23,862 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:23,863 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:31:23,863 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:23,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 17:31:23,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:23,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:23,959 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:28,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204485590] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:28,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:28,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 12 [2025-03-08 17:31:28,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166309913] [2025-03-08 17:31:28,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:28,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 17:31:28,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:28,063 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 17:31:28,063 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=110, Unknown=1, NotChecked=0, Total=156 [2025-03-08 17:31:28,063 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-08 17:31:28,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 154 transitions, 1472 flow. Second operand has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:28,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:28,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-08 17:31:28,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:28,304 INFO L124 PetriNetUnfolderBase]: 342/663 cut-off events. [2025-03-08 17:31:28,305 INFO L125 PetriNetUnfolderBase]: For 2618/2618 co-relation queries the response was YES. [2025-03-08 17:31:28,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3477 conditions, 663 events. 342/663 cut-off events. For 2618/2618 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3339 event pairs, 39 based on Foata normal form. 4/651 useless extension candidates. Maximal degree in co-relation 3383. Up to 538 conditions per place. [2025-03-08 17:31:28,309 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 135 selfloop transitions, 26 changer transitions 25/187 dead transitions. [2025-03-08 17:31:28,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 187 transitions, 2042 flow [2025-03-08 17:31:28,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 17:31:28,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-08 17:31:28,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 97 transitions. [2025-03-08 17:31:28,310 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4898989898989899 [2025-03-08 17:31:28,310 INFO L175 Difference]: Start difference. First operand has 142 places, 154 transitions, 1472 flow. Second operand 11 states and 97 transitions. [2025-03-08 17:31:28,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 187 transitions, 2042 flow [2025-03-08 17:31:28,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 187 transitions, 1896 flow, removed 53 selfloop flow, removed 7 redundant places. [2025-03-08 17:31:28,321 INFO L231 Difference]: Finished difference. Result has 146 places, 150 transitions, 1355 flow [2025-03-08 17:31:28,321 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1326, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1355, PETRI_PLACES=146, PETRI_TRANSITIONS=150} [2025-03-08 17:31:28,322 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 126 predicate places. [2025-03-08 17:31:28,322 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 150 transitions, 1355 flow [2025-03-08 17:31:28,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:28,322 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:28,322 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:28,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-08 17:31:28,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-08 17:31:28,523 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:31:28,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:28,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1619725314, now seen corresponding path program 6 times [2025-03-08 17:31:28,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:28,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3227933] [2025-03-08 17:31:28,523 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:31:28,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:28,526 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:28,533 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:28,533 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:31:28,533 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:28,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:28,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3227933] [2025-03-08 17:31:28,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3227933] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:28,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627781535] [2025-03-08 17:31:28,810 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:31:28,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:28,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:28,812 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:28,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 17:31:28,842 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:28,854 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:28,854 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:31:28,854 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:28,855 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:31:28,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:28,968 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:29,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627781535] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:29,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:29,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-08 17:31:29,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939494465] [2025-03-08 17:31:29,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:29,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 17:31:29,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:29,649 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 17:31:29,649 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2025-03-08 17:31:29,649 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-08 17:31:29,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 150 transitions, 1355 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:29,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:29,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-08 17:31:29,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:30,335 INFO L124 PetriNetUnfolderBase]: 383/734 cut-off events. [2025-03-08 17:31:30,336 INFO L125 PetriNetUnfolderBase]: For 3429/3429 co-relation queries the response was YES. [2025-03-08 17:31:30,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3966 conditions, 734 events. 383/734 cut-off events. For 3429/3429 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 3729 event pairs, 39 based on Foata normal form. 2/718 useless extension candidates. Maximal degree in co-relation 3919. Up to 585 conditions per place. [2025-03-08 17:31:30,341 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 159 selfloop transitions, 53 changer transitions 7/220 dead transitions. [2025-03-08 17:31:30,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 220 transitions, 2418 flow [2025-03-08 17:31:30,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-08 17:31:30,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-08 17:31:30,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 163 transitions. [2025-03-08 17:31:30,342 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2025-03-08 17:31:30,342 INFO L175 Difference]: Start difference. First operand has 146 places, 150 transitions, 1355 flow. Second operand 21 states and 163 transitions. [2025-03-08 17:31:30,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 220 transitions, 2418 flow [2025-03-08 17:31:30,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 220 transitions, 2328 flow, removed 17 selfloop flow, removed 10 redundant places. [2025-03-08 17:31:30,354 INFO L231 Difference]: Finished difference. Result has 158 places, 177 transitions, 1839 flow [2025-03-08 17:31:30,354 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1285, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1839, PETRI_PLACES=158, PETRI_TRANSITIONS=177} [2025-03-08 17:31:30,355 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 138 predicate places. [2025-03-08 17:31:30,355 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 177 transitions, 1839 flow [2025-03-08 17:31:30,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:30,355 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:30,355 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:30,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-08 17:31:30,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-08 17:31:30,556 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:31:30,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:30,556 INFO L85 PathProgramCache]: Analyzing trace with hash 2086507766, now seen corresponding path program 7 times [2025-03-08 17:31:30,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:30,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368748244] [2025-03-08 17:31:30,556 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:31:30,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:30,559 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 17:31:30,563 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:30,563 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:31:30,563 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:30,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:30,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:30,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368748244] [2025-03-08 17:31:30,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368748244] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:30,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037293263] [2025-03-08 17:31:30,798 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:31:30,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:30,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:30,800 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:30,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 17:31:30,823 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 17:31:30,837 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:30,837 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:31:30,837 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:30,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:31:30,838 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:30,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:30,968 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:31,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:31,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037293263] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:31,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:31,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-08 17:31:31,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706245400] [2025-03-08 17:31:31,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:31,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 17:31:31,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:31,473 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 17:31:31,473 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2025-03-08 17:31:31,473 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-08 17:31:31,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 177 transitions, 1839 flow. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:31,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:31,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-08 17:31:31,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:31,962 INFO L124 PetriNetUnfolderBase]: 379/718 cut-off events. [2025-03-08 17:31:31,962 INFO L125 PetriNetUnfolderBase]: For 4234/4234 co-relation queries the response was YES. [2025-03-08 17:31:31,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4110 conditions, 718 events. 379/718 cut-off events. For 4234/4234 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 3619 event pairs, 39 based on Foata normal form. 2/702 useless extension candidates. Maximal degree in co-relation 4060. Up to 585 conditions per place. [2025-03-08 17:31:31,966 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 150 selfloop transitions, 53 changer transitions 8/212 dead transitions. [2025-03-08 17:31:31,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 212 transitions, 2428 flow [2025-03-08 17:31:31,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-08 17:31:31,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-03-08 17:31:31,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 146 transitions. [2025-03-08 17:31:31,967 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40555555555555556 [2025-03-08 17:31:31,967 INFO L175 Difference]: Start difference. First operand has 158 places, 177 transitions, 1839 flow. Second operand 20 states and 146 transitions. [2025-03-08 17:31:31,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 212 transitions, 2428 flow [2025-03-08 17:31:31,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 212 transitions, 2179 flow, removed 102 selfloop flow, removed 9 redundant places. [2025-03-08 17:31:31,981 INFO L231 Difference]: Finished difference. Result has 171 places, 179 transitions, 1789 flow [2025-03-08 17:31:31,982 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1600, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1789, PETRI_PLACES=171, PETRI_TRANSITIONS=179} [2025-03-08 17:31:31,982 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 151 predicate places. [2025-03-08 17:31:31,982 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 179 transitions, 1789 flow [2025-03-08 17:31:31,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:31,982 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:31,982 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:31,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-08 17:31:32,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:32,183 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:31:32,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:32,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1334718850, now seen corresponding path program 8 times [2025-03-08 17:31:32,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:32,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491510104] [2025-03-08 17:31:32,184 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:31:32,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:32,186 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:32,191 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:32,191 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:31:32,191 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:32,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:32,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491510104] [2025-03-08 17:31:32,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491510104] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:32,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912300676] [2025-03-08 17:31:32,412 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:31:32,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:32,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:32,415 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:32,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 17:31:32,439 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:32,514 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:32,515 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:31:32,515 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:32,515 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:31:32,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:32,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:32,669 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:33,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912300676] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:33,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:33,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2025-03-08 17:31:33,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765364191] [2025-03-08 17:31:33,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:33,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 17:31:33,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:33,881 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 17:31:33,881 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2025-03-08 17:31:33,881 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-08 17:31:33,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 179 transitions, 1789 flow. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:33,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:33,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-08 17:31:33,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:34,524 INFO L124 PetriNetUnfolderBase]: 379/715 cut-off events. [2025-03-08 17:31:34,524 INFO L125 PetriNetUnfolderBase]: For 3754/3754 co-relation queries the response was YES. [2025-03-08 17:31:34,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4033 conditions, 715 events. 379/715 cut-off events. For 3754/3754 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 3575 event pairs, 35 based on Foata normal form. 2/699 useless extension candidates. Maximal degree in co-relation 3981. Up to 551 conditions per place. [2025-03-08 17:31:34,530 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 142 selfloop transitions, 60 changer transitions 8/211 dead transitions. [2025-03-08 17:31:34,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 211 transitions, 2375 flow [2025-03-08 17:31:34,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 17:31:34,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-08 17:31:34,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 122 transitions. [2025-03-08 17:31:34,532 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45185185185185184 [2025-03-08 17:31:34,533 INFO L175 Difference]: Start difference. First operand has 171 places, 179 transitions, 1789 flow. Second operand 15 states and 122 transitions. [2025-03-08 17:31:34,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 211 transitions, 2375 flow [2025-03-08 17:31:34,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 211 transitions, 2225 flow, removed 28 selfloop flow, removed 18 redundant places. [2025-03-08 17:31:34,549 INFO L231 Difference]: Finished difference. Result has 167 places, 181 transitions, 1845 flow [2025-03-08 17:31:34,549 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1640, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1845, PETRI_PLACES=167, PETRI_TRANSITIONS=181} [2025-03-08 17:31:34,551 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 147 predicate places. [2025-03-08 17:31:34,551 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 181 transitions, 1845 flow [2025-03-08 17:31:34,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:34,551 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:34,551 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:34,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-08 17:31:34,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-08 17:31:34,752 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:31:34,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:34,752 INFO L85 PathProgramCache]: Analyzing trace with hash 417319210, now seen corresponding path program 9 times [2025-03-08 17:31:34,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:34,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589112186] [2025-03-08 17:31:34,752 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:31:34,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:34,754 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:34,759 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:34,759 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:31:34,759 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:34,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:34,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589112186] [2025-03-08 17:31:34,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589112186] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:34,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991342465] [2025-03-08 17:31:34,952 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:31:34,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:34,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:34,954 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:34,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 17:31:34,974 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:34,985 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:34,985 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:31:34,985 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:34,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:31:34,986 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:35,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:35,068 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:36,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991342465] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:36,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:36,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-08 17:31:36,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223012922] [2025-03-08 17:31:36,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:36,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 17:31:36,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:36,033 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 17:31:36,034 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2025-03-08 17:31:36,034 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-08 17:31:36,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 181 transitions, 1845 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:36,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:36,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-08 17:31:36,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:36,428 INFO L124 PetriNetUnfolderBase]: 380/729 cut-off events. [2025-03-08 17:31:36,428 INFO L125 PetriNetUnfolderBase]: For 3675/3675 co-relation queries the response was YES. [2025-03-08 17:31:36,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4135 conditions, 729 events. 380/729 cut-off events. For 3675/3675 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 3714 event pairs, 39 based on Foata normal form. 3/714 useless extension candidates. Maximal degree in co-relation 4083. Up to 633 conditions per place. [2025-03-08 17:31:36,434 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 167 selfloop transitions, 40 changer transitions 7/215 dead transitions. [2025-03-08 17:31:36,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 215 transitions, 2476 flow [2025-03-08 17:31:36,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-08 17:31:36,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-08 17:31:36,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 131 transitions. [2025-03-08 17:31:36,435 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.404320987654321 [2025-03-08 17:31:36,435 INFO L175 Difference]: Start difference. First operand has 167 places, 181 transitions, 1845 flow. Second operand 18 states and 131 transitions. [2025-03-08 17:31:36,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 215 transitions, 2476 flow [2025-03-08 17:31:36,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 215 transitions, 2390 flow, removed 24 selfloop flow, removed 10 redundant places. [2025-03-08 17:31:36,453 INFO L231 Difference]: Finished difference. Result has 179 places, 186 transitions, 1960 flow [2025-03-08 17:31:36,453 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1761, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1960, PETRI_PLACES=179, PETRI_TRANSITIONS=186} [2025-03-08 17:31:36,454 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 159 predicate places. [2025-03-08 17:31:36,454 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 186 transitions, 1960 flow [2025-03-08 17:31:36,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:36,454 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:36,454 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:36,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-08 17:31:36,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-08 17:31:36,655 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:31:36,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:36,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1087714214, now seen corresponding path program 10 times [2025-03-08 17:31:36,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:36,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304557778] [2025-03-08 17:31:36,656 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:31:36,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:36,658 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:36,661 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:36,661 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:31:36,661 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:36,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:36,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304557778] [2025-03-08 17:31:36,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304557778] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:36,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119414100] [2025-03-08 17:31:36,857 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:31:36,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:36,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:36,859 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:36,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-08 17:31:36,880 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:36,927 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:36,927 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:31:36,927 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:36,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:31:36,928 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:37,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:37,035 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:37,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119414100] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:37,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:37,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-08 17:31:37,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659156555] [2025-03-08 17:31:37,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:37,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 17:31:37,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:37,608 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 17:31:37,609 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2025-03-08 17:31:37,609 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-08 17:31:37,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 186 transitions, 1960 flow. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:37,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:37,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-08 17:31:37,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:38,122 INFO L124 PetriNetUnfolderBase]: 400/758 cut-off events. [2025-03-08 17:31:38,123 INFO L125 PetriNetUnfolderBase]: For 4390/4390 co-relation queries the response was YES. [2025-03-08 17:31:38,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4438 conditions, 758 events. 400/758 cut-off events. For 4390/4390 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 3838 event pairs, 39 based on Foata normal form. 2/742 useless extension candidates. Maximal degree in co-relation 4380. Up to 650 conditions per place. [2025-03-08 17:31:38,130 INFO L140 encePairwiseOnDemand]: 9/18 looper letters, 180 selfloop transitions, 41 changer transitions 9/231 dead transitions. [2025-03-08 17:31:38,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 231 transitions, 2738 flow [2025-03-08 17:31:38,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-08 17:31:38,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-08 17:31:38,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 131 transitions. [2025-03-08 17:31:38,131 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42810457516339867 [2025-03-08 17:31:38,131 INFO L175 Difference]: Start difference. First operand has 179 places, 186 transitions, 1960 flow. Second operand 17 states and 131 transitions. [2025-03-08 17:31:38,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 231 transitions, 2738 flow [2025-03-08 17:31:38,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 231 transitions, 2633 flow, removed 28 selfloop flow, removed 12 redundant places. [2025-03-08 17:31:38,151 INFO L231 Difference]: Finished difference. Result has 188 places, 199 transitions, 2177 flow [2025-03-08 17:31:38,151 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1858, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2177, PETRI_PLACES=188, PETRI_TRANSITIONS=199} [2025-03-08 17:31:38,151 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 168 predicate places. [2025-03-08 17:31:38,152 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 199 transitions, 2177 flow [2025-03-08 17:31:38,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:38,152 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:38,152 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:38,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-08 17:31:38,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-08 17:31:38,352 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:31:38,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:38,353 INFO L85 PathProgramCache]: Analyzing trace with hash 383719982, now seen corresponding path program 11 times [2025-03-08 17:31:38,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:38,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242245672] [2025-03-08 17:31:38,353 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:31:38,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:38,355 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:38,359 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:38,359 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:31:38,359 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:38,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:38,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242245672] [2025-03-08 17:31:38,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242245672] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:38,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307909959] [2025-03-08 17:31:38,631 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:31:38,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:38,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:38,633 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:38,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-08 17:31:38,654 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:38,700 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:38,700 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:31:38,701 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:38,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:31:38,702 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:39,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:39,001 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:43,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307909959] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:43,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:43,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2025-03-08 17:31:43,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323016700] [2025-03-08 17:31:43,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:43,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:31:43,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:43,312 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:31:43,312 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:31:43,312 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-08 17:31:43,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 199 transitions, 2177 flow. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:43,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:43,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-08 17:31:43,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:47,650 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 [] [2025-03-08 17:31:49,428 INFO L124 PetriNetUnfolderBase]: 452/867 cut-off events. [2025-03-08 17:31:49,428 INFO L125 PetriNetUnfolderBase]: For 6211/6211 co-relation queries the response was YES. [2025-03-08 17:31:49,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5242 conditions, 867 events. 452/867 cut-off events. For 6211/6211 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 4659 event pairs, 35 based on Foata normal form. 3/852 useless extension candidates. Maximal degree in co-relation 5179. Up to 637 conditions per place. [2025-03-08 17:31:49,434 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 182 selfloop transitions, 75 changer transitions 19/277 dead transitions. [2025-03-08 17:31:49,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 277 transitions, 3442 flow [2025-03-08 17:31:49,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-08 17:31:49,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-03-08 17:31:49,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 174 transitions. [2025-03-08 17:31:49,435 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2025-03-08 17:31:49,435 INFO L175 Difference]: Start difference. First operand has 188 places, 199 transitions, 2177 flow. Second operand 22 states and 174 transitions. [2025-03-08 17:31:49,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 277 transitions, 3442 flow [2025-03-08 17:31:49,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 277 transitions, 3276 flow, removed 59 selfloop flow, removed 12 redundant places. [2025-03-08 17:31:49,456 INFO L231 Difference]: Finished difference. Result has 200 places, 230 transitions, 2660 flow [2025-03-08 17:31:49,457 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=2015, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2660, PETRI_PLACES=200, PETRI_TRANSITIONS=230} [2025-03-08 17:31:49,457 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 180 predicate places. [2025-03-08 17:31:49,457 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 230 transitions, 2660 flow [2025-03-08 17:31:49,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:49,457 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:49,457 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:49,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-08 17:31:49,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:49,658 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:31:49,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:49,658 INFO L85 PathProgramCache]: Analyzing trace with hash 2052908538, now seen corresponding path program 12 times [2025-03-08 17:31:49,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:49,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827395030] [2025-03-08 17:31:49,658 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:31:49,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:49,661 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:49,665 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:49,665 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:31:49,665 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:49,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:49,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827395030] [2025-03-08 17:31:49,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827395030] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:49,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681153002] [2025-03-08 17:31:49,949 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:31:49,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:49,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:49,951 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:49,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-08 17:31:49,972 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:50,009 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:50,009 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:31:50,009 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:50,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:31:50,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:50,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:50,143 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:50,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:50,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681153002] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:50,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:50,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2025-03-08 17:31:50,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055683972] [2025-03-08 17:31:50,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:50,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:31:50,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:50,407 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:31:50,407 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:31:50,407 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-08 17:31:50,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 230 transitions, 2660 flow. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:50,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:50,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-08 17:31:50,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:51,382 INFO L124 PetriNetUnfolderBase]: 476/912 cut-off events. [2025-03-08 17:31:51,382 INFO L125 PetriNetUnfolderBase]: For 8113/8113 co-relation queries the response was YES. [2025-03-08 17:31:51,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5938 conditions, 912 events. 476/912 cut-off events. For 8113/8113 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 4950 event pairs, 33 based on Foata normal form. 3/897 useless extension candidates. Maximal degree in co-relation 5876. Up to 630 conditions per place. [2025-03-08 17:31:51,391 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 186 selfloop transitions, 96 changer transitions 14/297 dead transitions. [2025-03-08 17:31:51,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 297 transitions, 3889 flow [2025-03-08 17:31:51,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-08 17:31:51,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-03-08 17:31:51,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 205 transitions. [2025-03-08 17:31:51,393 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4218106995884774 [2025-03-08 17:31:51,393 INFO L175 Difference]: Start difference. First operand has 200 places, 230 transitions, 2660 flow. Second operand 27 states and 205 transitions. [2025-03-08 17:31:51,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 297 transitions, 3889 flow [2025-03-08 17:31:51,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 297 transitions, 3511 flow, removed 177 selfloop flow, removed 9 redundant places. [2025-03-08 17:31:51,420 INFO L231 Difference]: Finished difference. Result has 219 places, 245 transitions, 2905 flow [2025-03-08 17:31:51,421 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=2312, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2905, PETRI_PLACES=219, PETRI_TRANSITIONS=245} [2025-03-08 17:31:51,421 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 199 predicate places. [2025-03-08 17:31:51,421 INFO L471 AbstractCegarLoop]: Abstraction has has 219 places, 245 transitions, 2905 flow [2025-03-08 17:31:51,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:51,421 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:51,421 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:51,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-08 17:31:51,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:51,623 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:31:51,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:51,624 INFO L85 PathProgramCache]: Analyzing trace with hash -747708122, now seen corresponding path program 13 times [2025-03-08 17:31:51,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:51,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843805905] [2025-03-08 17:31:51,624 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:31:51,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:51,626 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 17:31:51,629 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:51,629 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:31:51,629 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:51,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:51,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:51,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843805905] [2025-03-08 17:31:51,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843805905] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:51,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105865274] [2025-03-08 17:31:51,847 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:31:51,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:51,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:51,849 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:51,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-08 17:31:51,871 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 17:31:51,892 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:51,892 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:31:51,892 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:51,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:31:51,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:52,008 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:52,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:52,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105865274] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:52,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:52,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-08 17:31:52,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027389454] [2025-03-08 17:31:52,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:52,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 17:31:52,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:52,532 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 17:31:52,532 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2025-03-08 17:31:52,532 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-08 17:31:52,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 245 transitions, 2905 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:52,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:52,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-08 17:31:52,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:53,062 INFO L124 PetriNetUnfolderBase]: 498/949 cut-off events. [2025-03-08 17:31:53,062 INFO L125 PetriNetUnfolderBase]: For 10147/10147 co-relation queries the response was YES. [2025-03-08 17:31:53,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6371 conditions, 949 events. 498/949 cut-off events. For 10147/10147 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 5188 event pairs, 38 based on Foata normal form. 2/924 useless extension candidates. Maximal degree in co-relation 6309. Up to 795 conditions per place. [2025-03-08 17:31:53,069 INFO L140 encePairwiseOnDemand]: 9/18 looper letters, 224 selfloop transitions, 56 changer transitions 8/289 dead transitions. [2025-03-08 17:31:53,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 289 transitions, 3935 flow [2025-03-08 17:31:53,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-08 17:31:53,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-08 17:31:53,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 151 transitions. [2025-03-08 17:31:53,070 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2025-03-08 17:31:53,070 INFO L175 Difference]: Start difference. First operand has 219 places, 245 transitions, 2905 flow. Second operand 21 states and 151 transitions. [2025-03-08 17:31:53,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 289 transitions, 3935 flow [2025-03-08 17:31:53,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 289 transitions, 3582 flow, removed 136 selfloop flow, removed 14 redundant places. [2025-03-08 17:31:53,101 INFO L231 Difference]: Finished difference. Result has 227 places, 255 transitions, 2958 flow [2025-03-08 17:31:53,101 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=2554, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2958, PETRI_PLACES=227, PETRI_TRANSITIONS=255} [2025-03-08 17:31:53,102 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 207 predicate places. [2025-03-08 17:31:53,102 INFO L471 AbstractCegarLoop]: Abstraction has has 227 places, 255 transitions, 2958 flow [2025-03-08 17:31:53,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:53,102 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:53,102 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:53,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-08 17:31:53,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2025-03-08 17:31:53,306 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:31:53,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:53,306 INFO L85 PathProgramCache]: Analyzing trace with hash -796863272, now seen corresponding path program 14 times [2025-03-08 17:31:53,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:53,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747804380] [2025-03-08 17:31:53,306 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:31:53,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:53,308 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:53,312 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:53,312 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:31:53,312 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:53,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:53,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747804380] [2025-03-08 17:31:53,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747804380] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:53,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607855821] [2025-03-08 17:31:53,513 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:31:53,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:53,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:53,517 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:53,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-08 17:31:53,541 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:53,561 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:53,561 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:31:53,561 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:53,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:31:53,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:53,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:53,738 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:54,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:54,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607855821] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:54,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:54,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2025-03-08 17:31:54,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120006345] [2025-03-08 17:31:54,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:54,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 17:31:54,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:54,259 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 17:31:54,259 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2025-03-08 17:31:54,259 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-08 17:31:54,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 255 transitions, 2958 flow. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:54,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:54,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-08 17:31:54,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:55,068 INFO L124 PetriNetUnfolderBase]: 499/953 cut-off events. [2025-03-08 17:31:55,069 INFO L125 PetriNetUnfolderBase]: For 7813/7813 co-relation queries the response was YES. [2025-03-08 17:31:55,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6172 conditions, 953 events. 499/953 cut-off events. For 7813/7813 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 5230 event pairs, 35 based on Foata normal form. 2/930 useless extension candidates. Maximal degree in co-relation 6107. Up to 798 conditions per place. [2025-03-08 17:31:55,075 INFO L140 encePairwiseOnDemand]: 9/18 looper letters, 225 selfloop transitions, 56 changer transitions 8/290 dead transitions. [2025-03-08 17:31:55,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 290 transitions, 3797 flow [2025-03-08 17:31:55,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-08 17:31:55,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-08 17:31:55,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 136 transitions. [2025-03-08 17:31:55,075 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2025-03-08 17:31:55,076 INFO L175 Difference]: Start difference. First operand has 227 places, 255 transitions, 2958 flow. Second operand 17 states and 136 transitions. [2025-03-08 17:31:55,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 290 transitions, 3797 flow [2025-03-08 17:31:55,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 290 transitions, 3527 flow, removed 100 selfloop flow, removed 18 redundant places. [2025-03-08 17:31:55,108 INFO L231 Difference]: Finished difference. Result has 226 places, 258 transitions, 2959 flow [2025-03-08 17:31:55,108 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=2722, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2959, PETRI_PLACES=226, PETRI_TRANSITIONS=258} [2025-03-08 17:31:55,109 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 206 predicate places. [2025-03-08 17:31:55,109 INFO L471 AbstractCegarLoop]: Abstraction has has 226 places, 258 transitions, 2959 flow [2025-03-08 17:31:55,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:55,109 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:55,109 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:55,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-08 17:31:55,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-08 17:31:55,309 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:31:55,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:55,310 INFO L85 PathProgramCache]: Analyzing trace with hash 2102063688, now seen corresponding path program 15 times [2025-03-08 17:31:55,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:55,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788536854] [2025-03-08 17:31:55,310 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:31:55,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:55,316 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:55,320 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:55,320 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:31:55,320 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:55,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:55,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:55,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788536854] [2025-03-08 17:31:55,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788536854] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:55,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395862011] [2025-03-08 17:31:55,592 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:31:55,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:55,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:55,594 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:55,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-08 17:31:55,615 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:55,627 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:55,627 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:31:55,627 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:55,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:31:55,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:55,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:55,731 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:55,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:55,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395862011] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:55,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:55,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2025-03-08 17:31:55,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678213739] [2025-03-08 17:31:55,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:55,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:31:55,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:55,960 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:31:55,960 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:31:55,960 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-08 17:31:55,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 258 transitions, 2959 flow. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:55,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:55,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-08 17:31:55,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:56,936 INFO L124 PetriNetUnfolderBase]: 494/946 cut-off events. [2025-03-08 17:31:56,936 INFO L125 PetriNetUnfolderBase]: For 7245/7245 co-relation queries the response was YES. [2025-03-08 17:31:56,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5979 conditions, 946 events. 494/946 cut-off events. For 7245/7245 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 5192 event pairs, 39 based on Foata normal form. 3/922 useless extension candidates. Maximal degree in co-relation 5914. Up to 682 conditions per place. [2025-03-08 17:31:56,942 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 197 selfloop transitions, 98 changer transitions 12/308 dead transitions. [2025-03-08 17:31:56,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 308 transitions, 3805 flow [2025-03-08 17:31:56,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-08 17:31:56,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-03-08 17:31:56,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 199 transitions. [2025-03-08 17:31:56,942 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4252136752136752 [2025-03-08 17:31:56,942 INFO L175 Difference]: Start difference. First operand has 226 places, 258 transitions, 2959 flow. Second operand 26 states and 199 transitions. [2025-03-08 17:31:56,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 308 transitions, 3805 flow [2025-03-08 17:31:56,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 308 transitions, 3672 flow, removed 45 selfloop flow, removed 12 redundant places. [2025-03-08 17:31:56,973 INFO L231 Difference]: Finished difference. Result has 240 places, 262 transitions, 3134 flow [2025-03-08 17:31:56,973 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=2812, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3134, PETRI_PLACES=240, PETRI_TRANSITIONS=262} [2025-03-08 17:31:56,973 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 220 predicate places. [2025-03-08 17:31:56,974 INFO L471 AbstractCegarLoop]: Abstraction has has 240 places, 262 transitions, 3134 flow [2025-03-08 17:31:56,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:56,974 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:56,974 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:56,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-03-08 17:31:57,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:57,175 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:31:57,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:57,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1670603952, now seen corresponding path program 16 times [2025-03-08 17:31:57,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:57,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410715783] [2025-03-08 17:31:57,175 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:31:57,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:57,177 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:57,181 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:57,182 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:31:57,182 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:57,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:57,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:57,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410715783] [2025-03-08 17:31:57,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410715783] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:57,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704830442] [2025-03-08 17:31:57,388 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:31:57,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:57,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:57,390 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:57,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-08 17:31:57,411 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:57,430 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:57,430 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:31:57,430 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:57,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:31:57,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:57,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:57,551 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:58,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:58,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704830442] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:58,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:58,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-08 17:31:58,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347026011] [2025-03-08 17:31:58,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:58,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 17:31:58,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:58,105 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 17:31:58,105 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2025-03-08 17:31:58,105 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-08 17:31:58,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 262 transitions, 3134 flow. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:58,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:58,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-08 17:31:58,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:58,674 INFO L124 PetriNetUnfolderBase]: 523/993 cut-off events. [2025-03-08 17:31:58,674 INFO L125 PetriNetUnfolderBase]: For 9321/9321 co-relation queries the response was YES. [2025-03-08 17:31:58,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6806 conditions, 993 events. 523/993 cut-off events. For 9321/9321 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 5464 event pairs, 42 based on Foata normal form. 2/968 useless extension candidates. Maximal degree in co-relation 6740. Up to 849 conditions per place. [2025-03-08 17:31:58,680 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 241 selfloop transitions, 54 changer transitions 8/304 dead transitions. [2025-03-08 17:31:58,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 304 transitions, 4310 flow [2025-03-08 17:31:58,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-08 17:31:58,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-08 17:31:58,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 126 transitions. [2025-03-08 17:31:58,680 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2025-03-08 17:31:58,680 INFO L175 Difference]: Start difference. First operand has 240 places, 262 transitions, 3134 flow. Second operand 17 states and 126 transitions. [2025-03-08 17:31:58,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 304 transitions, 4310 flow [2025-03-08 17:31:58,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 304 transitions, 4021 flow, removed 89 selfloop flow, removed 19 redundant places. [2025-03-08 17:31:58,715 INFO L231 Difference]: Finished difference. Result has 239 places, 275 transitions, 3400 flow [2025-03-08 17:31:58,715 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=2875, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3400, PETRI_PLACES=239, PETRI_TRANSITIONS=275} [2025-03-08 17:31:58,715 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 219 predicate places. [2025-03-08 17:31:58,715 INFO L471 AbstractCegarLoop]: Abstraction has has 239 places, 275 transitions, 3400 flow [2025-03-08 17:31:58,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:58,715 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:58,715 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:58,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-08 17:31:58,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:58,916 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:31:58,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:58,916 INFO L85 PathProgramCache]: Analyzing trace with hash -490020698, now seen corresponding path program 17 times [2025-03-08 17:31:58,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:58,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12926131] [2025-03-08 17:31:58,916 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:31:58,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:58,918 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:58,922 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:58,922 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:31:58,922 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:59,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:59,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12926131] [2025-03-08 17:31:59,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12926131] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:59,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997100948] [2025-03-08 17:31:59,102 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:31:59,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:59,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:59,104 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:59,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-08 17:31:59,125 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:31:59,170 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:31:59,170 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:31:59,170 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:59,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:31:59,172 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:59,391 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:31:59,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997100948] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:59,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:59,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2025-03-08 17:31:59,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960183974] [2025-03-08 17:31:59,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:59,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:31:59,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:59,642 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:31:59,642 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:31:59,642 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-08 17:31:59,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 275 transitions, 3400 flow. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:59,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:59,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-08 17:31:59,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:32:00,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-08 17:32:04,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-08 17:32:08,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-08 17:32:12,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-08 17:32:13,142 INFO L124 PetriNetUnfolderBase]: 525/1005 cut-off events. [2025-03-08 17:32:13,142 INFO L125 PetriNetUnfolderBase]: For 9040/9040 co-relation queries the response was YES. [2025-03-08 17:32:13,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6808 conditions, 1005 events. 525/1005 cut-off events. For 9040/9040 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 5586 event pairs, 37 based on Foata normal form. 3/977 useless extension candidates. Maximal degree in co-relation 6738. Up to 808 conditions per place. [2025-03-08 17:32:13,149 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 236 selfloop transitions, 71 changer transitions 15/323 dead transitions. [2025-03-08 17:32:13,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 323 transitions, 4306 flow [2025-03-08 17:32:13,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-08 17:32:13,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-03-08 17:32:13,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 169 transitions. [2025-03-08 17:32:13,154 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4082125603864734 [2025-03-08 17:32:13,154 INFO L175 Difference]: Start difference. First operand has 239 places, 275 transitions, 3400 flow. Second operand 23 states and 169 transitions. [2025-03-08 17:32:13,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 323 transitions, 4306 flow [2025-03-08 17:32:13,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 323 transitions, 4039 flow, removed 116 selfloop flow, removed 9 redundant places. [2025-03-08 17:32:13,194 INFO L231 Difference]: Finished difference. Result has 258 places, 280 transitions, 3395 flow [2025-03-08 17:32:13,194 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=3137, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3395, PETRI_PLACES=258, PETRI_TRANSITIONS=280} [2025-03-08 17:32:13,194 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 238 predicate places. [2025-03-08 17:32:13,194 INFO L471 AbstractCegarLoop]: Abstraction has has 258 places, 280 transitions, 3395 flow [2025-03-08 17:32:13,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:32:13,195 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:32:13,195 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:32:13,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2025-03-08 17:32:13,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-03-08 17:32:13,395 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:32:13,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:32:13,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1621448802, now seen corresponding path program 18 times [2025-03-08 17:32:13,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:32:13,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320062186] [2025-03-08 17:32:13,396 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:32:13,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:32:13,398 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:32:13,402 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:32:13,402 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:32:13,402 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:13,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:32:13,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320062186] [2025-03-08 17:32:13,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320062186] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:32:13,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467286022] [2025-03-08 17:32:13,604 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:32:13,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:32:13,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:32:13,606 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:32:13,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-08 17:32:13,630 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 2 equivalence classes. [2025-03-08 17:32:13,641 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:32:13,641 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:32:13,641 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:13,641 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:32:13,642 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:32:13,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:13,727 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:32:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:14,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467286022] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:32:14,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:32:14,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-08 17:32:14,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572822348] [2025-03-08 17:32:14,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:32:14,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 17:32:14,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:32:14,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 17:32:14,191 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2025-03-08 17:32:14,191 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-08 17:32:14,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 280 transitions, 3395 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:32:14,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:32:14,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-08 17:32:14,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:32:14,789 INFO L124 PetriNetUnfolderBase]: 524/1004 cut-off events. [2025-03-08 17:32:14,789 INFO L125 PetriNetUnfolderBase]: For 9023/9023 co-relation queries the response was YES. [2025-03-08 17:32:14,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6739 conditions, 1004 events. 524/1004 cut-off events. For 9023/9023 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 5572 event pairs, 40 based on Foata normal form. 2/976 useless extension candidates. Maximal degree in co-relation 6662. Up to 858 conditions per place. [2025-03-08 17:32:14,795 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 249 selfloop transitions, 57 changer transitions 7/314 dead transitions. [2025-03-08 17:32:14,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 314 transitions, 4283 flow [2025-03-08 17:32:14,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-08 17:32:14,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-08 17:32:14,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 136 transitions. [2025-03-08 17:32:14,796 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41975308641975306 [2025-03-08 17:32:14,796 INFO L175 Difference]: Start difference. First operand has 258 places, 280 transitions, 3395 flow. Second operand 18 states and 136 transitions. [2025-03-08 17:32:14,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 314 transitions, 4283 flow [2025-03-08 17:32:14,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 314 transitions, 4156 flow, removed 29 selfloop flow, removed 15 redundant places. [2025-03-08 17:32:14,837 INFO L231 Difference]: Finished difference. Result has 260 places, 285 transitions, 3520 flow [2025-03-08 17:32:14,837 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=3268, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3520, PETRI_PLACES=260, PETRI_TRANSITIONS=285} [2025-03-08 17:32:14,838 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 240 predicate places. [2025-03-08 17:32:14,838 INFO L471 AbstractCegarLoop]: Abstraction has has 260 places, 285 transitions, 3520 flow [2025-03-08 17:32:14,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:32:14,838 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:32:14,838 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:32:14,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-03-08 17:32:15,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-03-08 17:32:15,039 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:32:15,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:32:15,039 INFO L85 PathProgramCache]: Analyzing trace with hash 955174788, now seen corresponding path program 19 times [2025-03-08 17:32:15,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:32:15,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293428733] [2025-03-08 17:32:15,040 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:32:15,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:32:15,041 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 17:32:15,045 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:32:15,045 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:32:15,045 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:15,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:15,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:32:15,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293428733] [2025-03-08 17:32:15,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293428733] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:32:15,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416219441] [2025-03-08 17:32:15,204 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:32:15,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:32:15,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:32:15,206 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:32:15,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-08 17:32:15,226 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 17:32:15,247 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:32:15,247 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:32:15,247 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:15,247 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:32:15,248 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:32:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:15,335 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:32:15,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:15,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416219441] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:32:15,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:32:15,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-03-08 17:32:15,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001810051] [2025-03-08 17:32:15,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:32:15,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 17:32:15,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:32:15,899 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 17:32:15,899 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2025-03-08 17:32:15,899 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-08 17:32:15,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 285 transitions, 3520 flow. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:32:15,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:32:15,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-08 17:32:15,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:32:16,300 INFO L124 PetriNetUnfolderBase]: 526/1016 cut-off events. [2025-03-08 17:32:16,300 INFO L125 PetriNetUnfolderBase]: For 9134/9134 co-relation queries the response was YES. [2025-03-08 17:32:16,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6906 conditions, 1016 events. 526/1016 cut-off events. For 9134/9134 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 5687 event pairs, 44 based on Foata normal form. 3/989 useless extension candidates. Maximal degree in co-relation 6828. Up to 920 conditions per place. [2025-03-08 17:32:16,305 INFO L140 encePairwiseOnDemand]: 10/18 looper letters, 266 selfloop transitions, 39 changer transitions 7/313 dead transitions. [2025-03-08 17:32:16,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 313 transitions, 4365 flow [2025-03-08 17:32:16,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 17:32:16,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-08 17:32:16,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 116 transitions. [2025-03-08 17:32:16,307 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2025-03-08 17:32:16,307 INFO L175 Difference]: Start difference. First operand has 260 places, 285 transitions, 3520 flow. Second operand 16 states and 116 transitions. [2025-03-08 17:32:16,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 313 transitions, 4365 flow [2025-03-08 17:32:16,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 313 transitions, 4155 flow, removed 71 selfloop flow, removed 14 redundant places. [2025-03-08 17:32:16,350 INFO L231 Difference]: Finished difference. Result has 264 places, 288 transitions, 3489 flow [2025-03-08 17:32:16,351 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=3310, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3489, PETRI_PLACES=264, PETRI_TRANSITIONS=288} [2025-03-08 17:32:16,351 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 244 predicate places. [2025-03-08 17:32:16,351 INFO L471 AbstractCegarLoop]: Abstraction has has 264 places, 288 transitions, 3489 flow [2025-03-08 17:32:16,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:32:16,351 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:32:16,351 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:32:16,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-03-08 17:32:16,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-08 17:32:16,552 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:32:16,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:32:16,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1004930532, now seen corresponding path program 20 times [2025-03-08 17:32:16,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:32:16,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714249455] [2025-03-08 17:32:16,553 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:32:16,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:32:16,554 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-08 17:32:16,559 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:32:16,559 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:32:16,559 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:16,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:32:16,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714249455] [2025-03-08 17:32:16,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714249455] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:32:16,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627746552] [2025-03-08 17:32:16,764 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:32:16,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:32:16,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:32:16,766 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:32:16,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-08 17:32:16,786 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-08 17:32:16,831 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:32:16,831 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:32:16,831 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:32:16,832 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-08 17:32:16,832 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:32:17,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:17,104 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:32:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:32:17,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627746552] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:32:17,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:32:17,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2025-03-08 17:32:17,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571600887] [2025-03-08 17:32:17,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:32:17,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-08 17:32:17,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:32:17,573 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-08 17:32:17,573 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2025-03-08 17:32:17,573 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-03-08 17:32:17,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 288 transitions, 3489 flow. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:32:17,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:32:17,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-03-08 17:32:17,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:32:22,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-03-08 17:32:26,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.79s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []