/root/.sdkman/candidates/java/21.0.5-tem/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata ./data -tc ../benchexec/../../../trunk/examples/toolchains/AutomizerCInline_IcfgBuilder.xml -s ../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.automaton.type.used.in.concurrency.analysis PETRI_NET --preprocessor.replace.while.statements.and.if-then-else.statements false -i ../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-14 01:01:07,644 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-14 01:01:07,698 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2025-04-14 01:01:07,703 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-14 01:01:07,703 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-14 01:01:07,726 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-14 01:01:07,727 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-14 01:01:07,727 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-14 01:01:07,727 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-14 01:01:07,727 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-14 01:01:07,728 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-14 01:01:07,728 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-14 01:01:07,728 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-14 01:01:07,728 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-14 01:01:07,728 INFO L153 SettingsManager]: * Use SBE=true [2025-04-14 01:01:07,728 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-14 01:01:07,728 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-14 01:01:07,728 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-14 01:01:07,728 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-14 01:01:07,728 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-14 01:01:07,729 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-14 01:01:07,729 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-14 01:01:07,729 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-14 01:01:07,729 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-14 01:01:07,729 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-14 01:01:07,729 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-14 01:01:07,729 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-14 01:01:07,729 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-14 01:01:07,729 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-14 01:01:07,729 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-14 01:01:07,729 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-14 01:01:07,729 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-14 01:01:07,729 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 01:01:07,729 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-14 01:01:07,729 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-14 01:01:07,729 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-14 01:01:07,729 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-14 01:01:07,729 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 01:01:07,730 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-14 01:01:07,730 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-14 01:01:07,730 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-14 01:01:07,730 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-14 01:01:07,730 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-14 01:01:07,730 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-14 01:01:07,730 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-14 01:01:07,730 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-14 01:01:07,730 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-14 01:01:07,730 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Automaton type used in concurrency analysis -> PETRI_NET Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Replace while statements and if-then-else statements -> false [2025-04-14 01:01:07,987 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-14 01:01:07,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-14 01:01:07,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-14 01:01:08,000 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-14 01:01:08,000 INFO L274 PluginConnector]: CDTParser initialized [2025-04-14 01:01:08,001 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2025-04-14 01:01:09,287 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af51e60ab/95521687f07242b583191d9efb30dac1/FLAG97c64ee1c [2025-04-14 01:01:09,493 INFO L389 CDTParser]: Found 1 translation units. [2025-04-14 01:01:09,494 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2025-04-14 01:01:09,502 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af51e60ab/95521687f07242b583191d9efb30dac1/FLAG97c64ee1c [2025-04-14 01:01:10,337 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af51e60ab/95521687f07242b583191d9efb30dac1 [2025-04-14 01:01:10,339 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-14 01:01:10,340 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-14 01:01:10,341 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-14 01:01:10,341 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-14 01:01:10,344 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-14 01:01:10,345 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.04 01:01:10" (1/1) ... [2025-04-14 01:01:10,345 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cd0fda6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:01:10, skipping insertion in model container [2025-04-14 01:01:10,346 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.04 01:01:10" (1/1) ... [2025-04-14 01:01:10,358 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-14 01:01:10,510 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c[2423,2436] [2025-04-14 01:01:10,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-14 01:01:10,522 INFO L200 MainTranslator]: Completed pre-run [2025-04-14 01:01:10,548 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c[2423,2436] [2025-04-14 01:01:10,555 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-14 01:01:10,568 INFO L204 MainTranslator]: Completed translation [2025-04-14 01:01:10,568 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:01:10 WrapperNode [2025-04-14 01:01:10,568 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-14 01:01:10,569 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-14 01:01:10,569 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-14 01:01:10,570 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-14 01:01:10,574 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:01:10" (1/1) ... [2025-04-14 01:01:10,584 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:01:10" (1/1) ... [2025-04-14 01:01:10,603 INFO L138 Inliner]: procedures = 21, calls = 21, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 128 [2025-04-14 01:01:10,605 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-14 01:01:10,606 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-14 01:01:10,606 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-14 01:01:10,606 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-14 01:01:10,612 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:01:10" (1/1) ... [2025-04-14 01:01:10,612 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:01:10" (1/1) ... [2025-04-14 01:01:10,616 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:01:10" (1/1) ... [2025-04-14 01:01:10,630 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-04-14 01:01:10,630 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:01:10" (1/1) ... [2025-04-14 01:01:10,630 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:01:10" (1/1) ... [2025-04-14 01:01:10,633 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:01:10" (1/1) ... [2025-04-14 01:01:10,634 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:01:10" (1/1) ... [2025-04-14 01:01:10,635 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:01:10" (1/1) ... [2025-04-14 01:01:10,635 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:01:10" (1/1) ... [2025-04-14 01:01:10,639 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-14 01:01:10,640 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-04-14 01:01:10,640 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-04-14 01:01:10,640 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-04-14 01:01:10,640 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:01:10" (1/1) ... [2025-04-14 01:01:10,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 01:01:10,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:01:10,663 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) [2025-04-14 01:01:10,665 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 [2025-04-14 01:01:10,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-14 01:01:10,681 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-14 01:01:10,681 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-14 01:01:10,681 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-14 01:01:10,681 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-14 01:01:10,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-14 01:01:10,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-14 01:01:10,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-04-14 01:01:10,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-04-14 01:01:10,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-04-14 01:01:10,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-14 01:01:10,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-14 01:01:10,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-14 01:01:10,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-04-14 01:01:10,683 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-14 01:01:10,756 INFO L256 CfgBuilder]: Building ICFG [2025-04-14 01:01:10,757 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-14 01:01:10,981 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-14 01:01:10,982 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-14 01:01:10,982 INFO L318 CfgBuilder]: Performing block encoding [2025-04-14 01:01:11,166 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-14 01:01:11,169 WARN L179 LargeBlockEncoding]: Complex 3:3 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-14 01:01:11,186 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-14 01:01:11,187 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.04 01:01:11 BoogieIcfgContainer [2025-04-14 01:01:11,187 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-04-14 01:01:11,188 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-14 01:01:11,188 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-14 01:01:11,191 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-14 01:01:11,192 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.04 01:01:10" (1/3) ... [2025-04-14 01:01:11,192 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51eb4dec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.04 01:01:11, skipping insertion in model container [2025-04-14 01:01:11,192 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:01:10" (2/3) ... [2025-04-14 01:01:11,192 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51eb4dec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.04 01:01:11, skipping insertion in model container [2025-04-14 01:01:11,192 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.04 01:01:11" (3/3) ... [2025-04-14 01:01:11,193 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2025-04-14 01:01:11,202 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-14 01:01:11,204 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-channel-sum.wvr.c that has 3 procedures, 25 locations, 31 edges, 1 initial locations, 3 loop locations, and 1 error locations. [2025-04-14 01:01:11,204 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-14 01:01:11,271 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-14 01:01:11,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 33 transitions, 80 flow [2025-04-14 01:01:11,337 INFO L116 PetriNetUnfolderBase]: 9/31 cut-off events. [2025-04-14 01:01:11,338 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-14 01:01:11,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 31 events. 9/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 21. Up to 3 conditions per place. [2025-04-14 01:01:11,342 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 33 transitions, 80 flow [2025-04-14 01:01:11,345 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 30 transitions, 72 flow [2025-04-14 01:01:11,354 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-14 01:01:11,364 INFO L340 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;@35b2f71d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-14 01:01:11,364 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-14 01:01:11,380 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-14 01:01:11,380 INFO L116 PetriNetUnfolderBase]: 9/29 cut-off events. [2025-04-14 01:01:11,380 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-14 01:01:11,381 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:01:11,381 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:01:11,381 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:01:11,386 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:01:11,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1223020240, now seen corresponding path program 1 times [2025-04-14 01:01:11,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:01:11,392 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602682843] [2025-04-14 01:01:11,392 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:01:11,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:01:11,450 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-04-14 01:01:11,470 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 01:01:11,471 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:01:11,471 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:01:11,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:01:11,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:01:11,630 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602682843] [2025-04-14 01:01:11,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602682843] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:01:11,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:01:11,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-14 01:01:11,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397363438] [2025-04-14 01:01:11,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:01:11,637 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-14 01:01:11,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:01:11,655 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-14 01:01:11,655 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-14 01:01:11,657 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 33 [2025-04-14 01:01:11,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2025-04-14 01:01:11,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:01:11,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 33 [2025-04-14 01:01:11,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:01:11,817 INFO L116 PetriNetUnfolderBase]: 232/351 cut-off events. [2025-04-14 01:01:11,817 INFO L117 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2025-04-14 01:01:11,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 735 conditions, 351 events. 232/351 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1003 event pairs, 64 based on Foata normal form. 1/229 useless extension candidates. Maximal degree in co-relation 630. Up to 178 conditions per place. [2025-04-14 01:01:11,823 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 40 selfloop transitions, 3 changer transitions 3/47 dead transitions. [2025-04-14 01:01:11,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 47 transitions, 207 flow [2025-04-14 01:01:11,825 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-14 01:01:11,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-14 01:01:11,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2025-04-14 01:01:11,834 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5858585858585859 [2025-04-14 01:01:11,835 INFO L175 Difference]: Start difference. First operand has 28 places, 30 transitions, 72 flow. Second operand 3 states and 58 transitions. [2025-04-14 01:01:11,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 47 transitions, 207 flow [2025-04-14 01:01:11,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 47 transitions, 193 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-04-14 01:01:11,843 INFO L231 Difference]: Finished difference. Result has 27 places, 30 transitions, 79 flow [2025-04-14 01:01:11,844 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=27, PETRI_TRANSITIONS=30} [2025-04-14 01:01:11,848 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, -1 predicate places. [2025-04-14 01:01:11,848 INFO L485 AbstractCegarLoop]: Abstraction has has 27 places, 30 transitions, 79 flow [2025-04-14 01:01:11,848 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2025-04-14 01:01:11,848 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:01:11,848 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:01:11,849 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-14 01:01:11,849 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:01:11,849 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:01:11,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1789023172, now seen corresponding path program 1 times [2025-04-14 01:01:11,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:01:11,849 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614182738] [2025-04-14 01:01:11,849 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:01:11,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:01:11,860 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-14 01:01:11,873 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 01:01:11,873 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:01:11,873 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:01:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:01:11,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:01:11,921 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614182738] [2025-04-14 01:01:11,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614182738] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:01:11,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:01:11,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-14 01:01:11,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811641277] [2025-04-14 01:01:11,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:01:11,922 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-14 01:01:11,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:01:11,923 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-14 01:01:11,923 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-14 01:01:11,923 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 33 [2025-04-14 01:01:11,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 30 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:01:11,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:01:11,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 33 [2025-04-14 01:01:11,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:01:12,044 INFO L116 PetriNetUnfolderBase]: 168/266 cut-off events. [2025-04-14 01:01:12,044 INFO L117 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-04-14 01:01:12,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 600 conditions, 266 events. 168/266 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 697 event pairs, 39 based on Foata normal form. 8/187 useless extension candidates. Maximal degree in co-relation 218. Up to 201 conditions per place. [2025-04-14 01:01:12,046 INFO L140 encePairwiseOnDemand]: 26/33 looper letters, 33 selfloop transitions, 7 changer transitions 1/42 dead transitions. [2025-04-14 01:01:12,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 42 transitions, 189 flow [2025-04-14 01:01:12,047 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-14 01:01:12,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-14 01:01:12,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2025-04-14 01:01:12,049 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.494949494949495 [2025-04-14 01:01:12,049 INFO L175 Difference]: Start difference. First operand has 27 places, 30 transitions, 79 flow. Second operand 3 states and 49 transitions. [2025-04-14 01:01:12,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 42 transitions, 189 flow [2025-04-14 01:01:12,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 42 transitions, 182 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-04-14 01:01:12,050 INFO L231 Difference]: Finished difference. Result has 29 places, 31 transitions, 103 flow [2025-04-14 01:01:12,050 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=29, PETRI_TRANSITIONS=31} [2025-04-14 01:01:12,051 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2025-04-14 01:01:12,051 INFO L485 AbstractCegarLoop]: Abstraction has has 29 places, 31 transitions, 103 flow [2025-04-14 01:01:12,051 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:01:12,051 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:01:12,051 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:01:12,051 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-14 01:01:12,051 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:01:12,052 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:01:12,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1303793539, now seen corresponding path program 1 times [2025-04-14 01:01:12,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:01:12,052 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875070709] [2025-04-14 01:01:12,052 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:01:12,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:01:12,061 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-14 01:01:12,097 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 01:01:12,101 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:01:12,101 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:01:12,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:01:12,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:01:12,218 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875070709] [2025-04-14 01:01:12,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875070709] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:01:12,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:01:12,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-14 01:01:12,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003192454] [2025-04-14 01:01:12,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:01:12,218 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-14 01:01:12,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:01:12,219 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-14 01:01:12,219 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-14 01:01:12,219 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 33 [2025-04-14 01:01:12,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 31 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:01:12,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:01:12,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 33 [2025-04-14 01:01:12,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:01:12,320 INFO L116 PetriNetUnfolderBase]: 167/269 cut-off events. [2025-04-14 01:01:12,321 INFO L117 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2025-04-14 01:01:12,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 663 conditions, 269 events. 167/269 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 683 event pairs, 82 based on Foata normal form. 2/205 useless extension candidates. Maximal degree in co-relation 240. Up to 260 conditions per place. [2025-04-14 01:01:12,324 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 28 selfloop transitions, 3 changer transitions 5/37 dead transitions. [2025-04-14 01:01:12,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 37 transitions, 189 flow [2025-04-14 01:01:12,325 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-14 01:01:12,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-14 01:01:12,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2025-04-14 01:01:12,328 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3409090909090909 [2025-04-14 01:01:12,328 INFO L175 Difference]: Start difference. First operand has 29 places, 31 transitions, 103 flow. Second operand 4 states and 45 transitions. [2025-04-14 01:01:12,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 37 transitions, 189 flow [2025-04-14 01:01:12,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 37 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-14 01:01:12,330 INFO L231 Difference]: Finished difference. Result has 33 places, 32 transitions, 114 flow [2025-04-14 01:01:12,331 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=33, PETRI_TRANSITIONS=32} [2025-04-14 01:01:12,331 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 5 predicate places. [2025-04-14 01:01:12,331 INFO L485 AbstractCegarLoop]: Abstraction has has 33 places, 32 transitions, 114 flow [2025-04-14 01:01:12,331 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:01:12,331 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:01:12,331 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:01:12,331 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-14 01:01:12,332 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:01:12,332 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:01:12,332 INFO L85 PathProgramCache]: Analyzing trace with hash 115349054, now seen corresponding path program 1 times [2025-04-14 01:01:12,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:01:12,332 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714600808] [2025-04-14 01:01:12,332 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:01:12,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:01:12,343 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 01:01:12,364 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:01:12,364 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:01:12,364 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:01:12,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:01:12,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:01:12,886 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714600808] [2025-04-14 01:01:12,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714600808] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:01:12,886 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635260433] [2025-04-14 01:01:12,886 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:01:12,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:01:12,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:01:12,890 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) [2025-04-14 01:01:12,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-04-14 01:01:12,938 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 01:01:12,956 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 01:01:12,957 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:01:12,957 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:01:12,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-04-14 01:01:12,963 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:01:13,054 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-14 01:01:13,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:01:13,222 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:01:13,546 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2025-04-14 01:01:13,559 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:01:13,559 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 68 [2025-04-14 01:01:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:01:13,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635260433] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:01:13,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:01:13,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2025-04-14 01:01:13,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900700414] [2025-04-14 01:01:13,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:01:13,713 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-04-14 01:01:13,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:01:13,713 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-04-14 01:01:13,714 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2025-04-14 01:01:13,714 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 33 [2025-04-14 01:01:13,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 32 transitions, 114 flow. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 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) [2025-04-14 01:01:13,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:01:13,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 33 [2025-04-14 01:01:13,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:01:14,788 INFO L116 PetriNetUnfolderBase]: 534/836 cut-off events. [2025-04-14 01:01:14,788 INFO L117 PetriNetUnfolderBase]: For 196/196 co-relation queries the response was YES. [2025-04-14 01:01:14,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2040 conditions, 836 events. 534/836 cut-off events. For 196/196 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3180 event pairs, 20 based on Foata normal form. 6/652 useless extension candidates. Maximal degree in co-relation 2013. Up to 161 conditions per place. [2025-04-14 01:01:14,794 INFO L140 encePairwiseOnDemand]: 16/33 looper letters, 104 selfloop transitions, 79 changer transitions 16/200 dead transitions. [2025-04-14 01:01:14,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 200 transitions, 991 flow [2025-04-14 01:01:14,794 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-04-14 01:01:14,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-04-14 01:01:14,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 287 transitions. [2025-04-14 01:01:14,798 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2805474095796676 [2025-04-14 01:01:14,798 INFO L175 Difference]: Start difference. First operand has 33 places, 32 transitions, 114 flow. Second operand 31 states and 287 transitions. [2025-04-14 01:01:14,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 200 transitions, 991 flow [2025-04-14 01:01:14,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 200 transitions, 979 flow, removed 3 selfloop flow, removed 3 redundant places. [2025-04-14 01:01:14,803 INFO L231 Difference]: Finished difference. Result has 69 places, 117 transitions, 663 flow [2025-04-14 01:01:14,803 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=663, PETRI_PLACES=69, PETRI_TRANSITIONS=117} [2025-04-14 01:01:14,804 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 41 predicate places. [2025-04-14 01:01:14,804 INFO L485 AbstractCegarLoop]: Abstraction has has 69 places, 117 transitions, 663 flow [2025-04-14 01:01:14,804 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 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) [2025-04-14 01:01:14,804 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:01:14,804 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:01:14,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-04-14 01:01:15,005 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:01:15,005 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:01:15,006 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:01:15,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1405428950, now seen corresponding path program 1 times [2025-04-14 01:01:15,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:01:15,006 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035954370] [2025-04-14 01:01:15,006 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:01:15,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:01:15,012 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-04-14 01:01:15,018 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-04-14 01:01:15,018 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:01:15,018 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:01:15,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:01:15,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:01:15,072 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035954370] [2025-04-14 01:01:15,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035954370] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:01:15,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:01:15,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-14 01:01:15,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745452599] [2025-04-14 01:01:15,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:01:15,072 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-14 01:01:15,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:01:15,073 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-14 01:01:15,073 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-14 01:01:15,073 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 33 [2025-04-14 01:01:15,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 117 transitions, 663 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:01:15,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:01:15,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 33 [2025-04-14 01:01:15,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:01:15,234 INFO L116 PetriNetUnfolderBase]: 779/1196 cut-off events. [2025-04-14 01:01:15,234 INFO L117 PetriNetUnfolderBase]: For 849/849 co-relation queries the response was YES. [2025-04-14 01:01:15,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4057 conditions, 1196 events. 779/1196 cut-off events. For 849/849 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4470 event pairs, 93 based on Foata normal form. 54/1191 useless extension candidates. Maximal degree in co-relation 3807. Up to 609 conditions per place. [2025-04-14 01:01:15,242 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 162 selfloop transitions, 66 changer transitions 0/229 dead transitions. [2025-04-14 01:01:15,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 229 transitions, 1765 flow [2025-04-14 01:01:15,242 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-14 01:01:15,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-14 01:01:15,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2025-04-14 01:01:15,243 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2025-04-14 01:01:15,243 INFO L175 Difference]: Start difference. First operand has 69 places, 117 transitions, 663 flow. Second operand 4 states and 68 transitions. [2025-04-14 01:01:15,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 229 transitions, 1765 flow [2025-04-14 01:01:15,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 229 transitions, 1462 flow, removed 98 selfloop flow, removed 9 redundant places. [2025-04-14 01:01:15,259 INFO L231 Difference]: Finished difference. Result has 65 places, 175 transitions, 1134 flow [2025-04-14 01:01:15,259 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1134, PETRI_PLACES=65, PETRI_TRANSITIONS=175} [2025-04-14 01:01:15,260 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 37 predicate places. [2025-04-14 01:01:15,260 INFO L485 AbstractCegarLoop]: Abstraction has has 65 places, 175 transitions, 1134 flow [2025-04-14 01:01:15,260 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:01:15,260 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:01:15,260 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:01:15,260 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-04-14 01:01:15,260 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:01:15,262 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:01:15,262 INFO L85 PathProgramCache]: Analyzing trace with hash -562771649, now seen corresponding path program 1 times [2025-04-14 01:01:15,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:01:15,263 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532517439] [2025-04-14 01:01:15,263 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:01:15,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:01:15,269 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-04-14 01:01:15,280 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-04-14 01:01:15,280 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:01:15,280 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:01:15,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:01:15,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:01:15,388 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532517439] [2025-04-14 01:01:15,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532517439] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:01:15,388 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351208575] [2025-04-14 01:01:15,388 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:01:15,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:01:15,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:01:15,391 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) [2025-04-14 01:01:15,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-14 01:01:15,431 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-04-14 01:01:15,450 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-04-14 01:01:15,450 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:01:15,450 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:01:15,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-04-14 01:01:15,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:01:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:01:15,525 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:01:15,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:01:15,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351208575] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:01:15,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:01:15,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2025-04-14 01:01:15,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653263604] [2025-04-14 01:01:15,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:01:15,585 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-14 01:01:15,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:01:15,586 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-14 01:01:15,586 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2025-04-14 01:01:15,586 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 33 [2025-04-14 01:01:15,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 175 transitions, 1134 flow. Second operand has 15 states, 15 states have (on average 5.4) internal successors, (81), 15 states have internal predecessors, (81), 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) [2025-04-14 01:01:15,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:01:15,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 33 [2025-04-14 01:01:15,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:01:15,740 INFO L116 PetriNetUnfolderBase]: 516/807 cut-off events. [2025-04-14 01:01:15,740 INFO L117 PetriNetUnfolderBase]: For 762/762 co-relation queries the response was YES. [2025-04-14 01:01:15,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2854 conditions, 807 events. 516/807 cut-off events. For 762/762 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2704 event pairs, 196 based on Foata normal form. 8/773 useless extension candidates. Maximal degree in co-relation 2709. Up to 772 conditions per place. [2025-04-14 01:01:15,744 INFO L140 encePairwiseOnDemand]: 24/33 looper letters, 104 selfloop transitions, 5 changer transitions 12/122 dead transitions. [2025-04-14 01:01:15,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 122 transitions, 1011 flow [2025-04-14 01:01:15,745 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-04-14 01:01:15,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-04-14 01:01:15,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 66 transitions. [2025-04-14 01:01:15,746 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.25 [2025-04-14 01:01:15,746 INFO L175 Difference]: Start difference. First operand has 65 places, 175 transitions, 1134 flow. Second operand 8 states and 66 transitions. [2025-04-14 01:01:15,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 122 transitions, 1011 flow [2025-04-14 01:01:15,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 122 transitions, 1007 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-04-14 01:01:15,751 INFO L231 Difference]: Finished difference. Result has 64 places, 110 transitions, 726 flow [2025-04-14 01:01:15,751 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=726, PETRI_PLACES=64, PETRI_TRANSITIONS=110} [2025-04-14 01:01:15,755 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 36 predicate places. [2025-04-14 01:01:15,755 INFO L485 AbstractCegarLoop]: Abstraction has has 64 places, 110 transitions, 726 flow [2025-04-14 01:01:15,755 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 15 states have internal predecessors, (81), 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) [2025-04-14 01:01:15,755 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:01:15,755 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:01:15,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-04-14 01:01:15,960 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-04-14 01:01:15,960 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:01:15,960 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:01:15,960 INFO L85 PathProgramCache]: Analyzing trace with hash -773789014, now seen corresponding path program 2 times [2025-04-14 01:01:15,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:01:15,961 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349498916] [2025-04-14 01:01:15,961 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:01:15,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:01:15,968 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-04-14 01:01:15,980 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 21 of 25 statements. [2025-04-14 01:01:15,980 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-14 01:01:15,980 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:01:16,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-04-14 01:01:16,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:01:16,071 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349498916] [2025-04-14 01:01:16,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349498916] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:01:16,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:01:16,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-14 01:01:16,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611096580] [2025-04-14 01:01:16,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:01:16,072 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-14 01:01:16,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:01:16,072 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-14 01:01:16,072 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-14 01:01:16,072 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 33 [2025-04-14 01:01:16,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 110 transitions, 726 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:01:16,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:01:16,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 33 [2025-04-14 01:01:16,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:01:16,164 INFO L116 PetriNetUnfolderBase]: 436/696 cut-off events. [2025-04-14 01:01:16,165 INFO L117 PetriNetUnfolderBase]: For 835/835 co-relation queries the response was YES. [2025-04-14 01:01:16,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2432 conditions, 696 events. 436/696 cut-off events. For 835/835 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2377 event pairs, 102 based on Foata normal form. 41/695 useless extension candidates. Maximal degree in co-relation 2418. Up to 487 conditions per place. [2025-04-14 01:01:16,169 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 117 selfloop transitions, 9 changer transitions 0/127 dead transitions. [2025-04-14 01:01:16,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 127 transitions, 1086 flow [2025-04-14 01:01:16,170 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-14 01:01:16,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-14 01:01:16,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2025-04-14 01:01:16,170 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2025-04-14 01:01:16,170 INFO L175 Difference]: Start difference. First operand has 64 places, 110 transitions, 726 flow. Second operand 3 states and 41 transitions. [2025-04-14 01:01:16,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 127 transitions, 1086 flow [2025-04-14 01:01:16,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 127 transitions, 1068 flow, removed 2 selfloop flow, removed 7 redundant places. [2025-04-14 01:01:16,176 INFO L231 Difference]: Finished difference. Result has 52 places, 107 transitions, 703 flow [2025-04-14 01:01:16,176 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=703, PETRI_PLACES=52, PETRI_TRANSITIONS=107} [2025-04-14 01:01:16,177 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 24 predicate places. [2025-04-14 01:01:16,177 INFO L485 AbstractCegarLoop]: Abstraction has has 52 places, 107 transitions, 703 flow [2025-04-14 01:01:16,177 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:01:16,177 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:01:16,177 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:01:16,177 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-04-14 01:01:16,177 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:01:16,177 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:01:16,177 INFO L85 PathProgramCache]: Analyzing trace with hash 876440355, now seen corresponding path program 1 times [2025-04-14 01:01:16,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:01:16,178 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652427688] [2025-04-14 01:01:16,178 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:01:16,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:01:16,183 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-04-14 01:01:16,205 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-04-14 01:01:16,205 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:01:16,205 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:01:17,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:01:17,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:01:17,213 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652427688] [2025-04-14 01:01:17,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652427688] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:01:17,213 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978724703] [2025-04-14 01:01:17,213 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:01:17,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:01:17,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:01:17,215 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) [2025-04-14 01:01:17,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-14 01:01:17,258 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-04-14 01:01:17,277 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-04-14 01:01:17,277 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:01:17,278 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:01:17,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-04-14 01:01:17,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:01:17,748 INFO L325 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2025-04-14 01:01:17,749 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 21 [2025-04-14 01:01:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:01:17,772 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:01:18,153 INFO L325 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2025-04-14 01:01:18,154 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 60 [2025-04-14 01:01:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:01:18,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978724703] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:01:18,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:01:18,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2025-04-14 01:01:18,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940612593] [2025-04-14 01:01:18,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:01:18,634 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-04-14 01:01:18,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:01:18,634 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-04-14 01:01:18,635 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2025-04-14 01:01:18,635 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 33 [2025-04-14 01:01:18,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 107 transitions, 703 flow. Second operand has 37 states, 37 states have (on average 4.783783783783784) internal successors, (177), 37 states have internal predecessors, (177), 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) [2025-04-14 01:01:18,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:01:18,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 33 [2025-04-14 01:01:18,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:01:23,138 INFO L116 PetriNetUnfolderBase]: 1778/2773 cut-off events. [2025-04-14 01:01:23,138 INFO L117 PetriNetUnfolderBase]: For 3017/3017 co-relation queries the response was YES. [2025-04-14 01:01:23,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10139 conditions, 2773 events. 1778/2773 cut-off events. For 3017/3017 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13041 event pairs, 34 based on Foata normal form. 18/2789 useless extension candidates. Maximal degree in co-relation 10126. Up to 706 conditions per place. [2025-04-14 01:01:23,153 INFO L140 encePairwiseOnDemand]: 16/33 looper letters, 353 selfloop transitions, 303 changer transitions 45/702 dead transitions. [2025-04-14 01:01:23,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 702 transitions, 5522 flow [2025-04-14 01:01:23,154 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2025-04-14 01:01:23,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2025-04-14 01:01:23,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 613 transitions. [2025-04-14 01:01:23,158 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.26536796536796536 [2025-04-14 01:01:23,158 INFO L175 Difference]: Start difference. First operand has 52 places, 107 transitions, 703 flow. Second operand 70 states and 613 transitions. [2025-04-14 01:01:23,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 702 transitions, 5522 flow [2025-04-14 01:01:23,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 702 transitions, 5322 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-14 01:01:23,179 INFO L231 Difference]: Finished difference. Result has 147 places, 392 transitions, 3486 flow [2025-04-14 01:01:23,180 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=3486, PETRI_PLACES=147, PETRI_TRANSITIONS=392} [2025-04-14 01:01:23,180 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 119 predicate places. [2025-04-14 01:01:23,180 INFO L485 AbstractCegarLoop]: Abstraction has has 147 places, 392 transitions, 3486 flow [2025-04-14 01:01:23,182 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.783783783783784) internal successors, (177), 37 states have internal predecessors, (177), 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) [2025-04-14 01:01:23,182 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:01:23,182 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:01:23,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-04-14 01:01:23,384 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:01:23,384 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:01:23,384 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:01:23,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1284895647, now seen corresponding path program 2 times [2025-04-14 01:01:23,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:01:23,385 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438299298] [2025-04-14 01:01:23,385 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:01:23,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:01:23,393 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-04-14 01:01:23,416 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-04-14 01:01:23,416 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:01:23,416 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:01:23,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:01:23,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:01:23,850 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438299298] [2025-04-14 01:01:23,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438299298] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:01:23,850 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343823282] [2025-04-14 01:01:23,850 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:01:23,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:01:23,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:01:23,852 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) [2025-04-14 01:01:23,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-04-14 01:01:23,898 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-04-14 01:01:23,919 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-04-14 01:01:23,919 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:01:23,919 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:01:23,920 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-04-14 01:01:23,922 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:01:23,994 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-04-14 01:01:24,293 INFO L325 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2025-04-14 01:01:24,293 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 15 [2025-04-14 01:01:24,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:01:24,311 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:01:24,722 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 104 [2025-04-14 01:01:24,751 INFO L325 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2025-04-14 01:01:24,752 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 224 treesize of output 196 [2025-04-14 01:01:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:01:25,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343823282] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:01:25,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:01:25,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2025-04-14 01:01:25,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791464795] [2025-04-14 01:01:25,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:01:25,910 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-04-14 01:01:25,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:01:25,911 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-04-14 01:01:25,911 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1194, Unknown=0, NotChecked=0, Total=1406 [2025-04-14 01:01:25,911 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 33 [2025-04-14 01:01:25,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 392 transitions, 3486 flow. Second operand has 38 states, 38 states have (on average 4.7631578947368425) internal successors, (181), 38 states have internal predecessors, (181), 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) [2025-04-14 01:01:25,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:01:25,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 33 [2025-04-14 01:01:25,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:01:31,612 INFO L116 PetriNetUnfolderBase]: 2467/3874 cut-off events. [2025-04-14 01:01:31,613 INFO L117 PetriNetUnfolderBase]: For 6489/6489 co-relation queries the response was YES. [2025-04-14 01:01:31,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16464 conditions, 3874 events. 2467/3874 cut-off events. For 6489/6489 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 19946 event pairs, 15 based on Foata normal form. 22/3894 useless extension candidates. Maximal degree in co-relation 16423. Up to 916 conditions per place. [2025-04-14 01:01:31,638 INFO L140 encePairwiseOnDemand]: 16/33 looper letters, 274 selfloop transitions, 591 changer transitions 48/914 dead transitions. [2025-04-14 01:01:31,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 914 transitions, 8476 flow [2025-04-14 01:01:31,638 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2025-04-14 01:01:31,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2025-04-14 01:01:31,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 838 transitions. [2025-04-14 01:01:31,642 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.24184704184704184 [2025-04-14 01:01:31,642 INFO L175 Difference]: Start difference. First operand has 147 places, 392 transitions, 3486 flow. Second operand 105 states and 838 transitions. [2025-04-14 01:01:31,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 914 transitions, 8476 flow [2025-04-14 01:01:31,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 914 transitions, 7896 flow, removed 121 selfloop flow, removed 12 redundant places. [2025-04-14 01:01:31,716 INFO L231 Difference]: Finished difference. Result has 232 places, 670 transitions, 6770 flow [2025-04-14 01:01:31,716 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2536, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=105, PETRI_FLOW=6770, PETRI_PLACES=232, PETRI_TRANSITIONS=670} [2025-04-14 01:01:31,717 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 204 predicate places. [2025-04-14 01:01:31,717 INFO L485 AbstractCegarLoop]: Abstraction has has 232 places, 670 transitions, 6770 flow [2025-04-14 01:01:31,717 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.7631578947368425) internal successors, (181), 38 states have internal predecessors, (181), 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) [2025-04-14 01:01:31,717 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:01:31,717 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:01:31,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-04-14 01:01:31,923 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:01:31,923 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:01:31,923 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:01:31,924 INFO L85 PathProgramCache]: Analyzing trace with hash 210511167, now seen corresponding path program 3 times [2025-04-14 01:01:31,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:01:31,924 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171119189] [2025-04-14 01:01:31,924 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:01:31,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:01:31,932 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 2 equivalence classes. [2025-04-14 01:01:31,949 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-04-14 01:01:31,949 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:01:31,949 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:01:32,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:01:32,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:01:32,382 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171119189] [2025-04-14 01:01:32,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171119189] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:01:32,382 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713822869] [2025-04-14 01:01:32,382 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:01:32,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:01:32,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:01:32,384 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) [2025-04-14 01:01:32,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-04-14 01:01:32,423 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 2 equivalence classes. [2025-04-14 01:01:32,442 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-04-14 01:01:32,442 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:01:32,442 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:01:32,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-04-14 01:01:32,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:01:32,511 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-14 01:01:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:01:32,781 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:01:33,120 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 105 [2025-04-14 01:01:33,138 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:01:33,138 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 208 [2025-04-14 01:01:33,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:01:33,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713822869] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:01:33,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:01:33,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2025-04-14 01:01:33,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854550841] [2025-04-14 01:01:33,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:01:33,570 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-04-14 01:01:33,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:01:33,570 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-04-14 01:01:33,571 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2025-04-14 01:01:33,571 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 33 [2025-04-14 01:01:33,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 670 transitions, 6770 flow. Second operand has 38 states, 38 states have (on average 4.7631578947368425) internal successors, (181), 38 states have internal predecessors, (181), 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) [2025-04-14 01:01:33,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:01:33,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 33 [2025-04-14 01:01:33,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:01:38,097 INFO L116 PetriNetUnfolderBase]: 3623/5607 cut-off events. [2025-04-14 01:01:38,097 INFO L117 PetriNetUnfolderBase]: For 11260/11260 co-relation queries the response was YES. [2025-04-14 01:01:38,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27790 conditions, 5607 events. 3623/5607 cut-off events. For 11260/11260 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 31424 event pairs, 16 based on Foata normal form. 18/5624 useless extension candidates. Maximal degree in co-relation 27740. Up to 1551 conditions per place. [2025-04-14 01:01:38,139 INFO L140 encePairwiseOnDemand]: 16/33 looper letters, 236 selfloop transitions, 991 changer transitions 104/1332 dead transitions. [2025-04-14 01:01:38,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 1332 transitions, 14954 flow [2025-04-14 01:01:38,140 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2025-04-14 01:01:38,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2025-04-14 01:01:38,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 887 transitions. [2025-04-14 01:01:38,143 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2443526170798898 [2025-04-14 01:01:38,143 INFO L175 Difference]: Start difference. First operand has 232 places, 670 transitions, 6770 flow. Second operand 110 states and 887 transitions. [2025-04-14 01:01:38,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 1332 transitions, 14954 flow [2025-04-14 01:01:38,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 1332 transitions, 13348 flow, removed 379 selfloop flow, removed 40 redundant places. [2025-04-14 01:01:38,299 INFO L231 Difference]: Finished difference. Result has 291 places, 1050 transitions, 11706 flow [2025-04-14 01:01:38,300 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=4015, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=428, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=110, PETRI_FLOW=11706, PETRI_PLACES=291, PETRI_TRANSITIONS=1050} [2025-04-14 01:01:38,301 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 263 predicate places. [2025-04-14 01:01:38,301 INFO L485 AbstractCegarLoop]: Abstraction has has 291 places, 1050 transitions, 11706 flow [2025-04-14 01:01:38,301 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.7631578947368425) internal successors, (181), 38 states have internal predecessors, (181), 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) [2025-04-14 01:01:38,301 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:01:38,301 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:01:38,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-04-14 01:01:38,501 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-04-14 01:01:38,502 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:01:38,502 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:01:38,502 INFO L85 PathProgramCache]: Analyzing trace with hash -638955022, now seen corresponding path program 4 times [2025-04-14 01:01:38,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:01:38,502 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260191865] [2025-04-14 01:01:38,502 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:01:38,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:01:38,510 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-04-14 01:01:38,525 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-14 01:01:38,525 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:01:38,525 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:01:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 01:01:38,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:01:38,801 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260191865] [2025-04-14 01:01:38,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260191865] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:01:38,802 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283761646] [2025-04-14 01:01:38,802 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:01:38,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:01:38,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:01:38,804 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) [2025-04-14 01:01:38,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-04-14 01:01:38,848 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-04-14 01:01:38,867 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-04-14 01:01:38,867 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:01:38,867 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:01:38,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-04-14 01:01:38,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:01:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:01:39,024 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:01:39,181 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:01:39,181 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2025-04-14 01:01:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 01:01:39,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283761646] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:01:39,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:01:39,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 25 [2025-04-14 01:01:39,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772517470] [2025-04-14 01:01:39,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:01:39,253 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-04-14 01:01:39,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:01:39,254 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-04-14 01:01:39,254 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2025-04-14 01:01:39,254 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 33 [2025-04-14 01:01:39,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 1050 transitions, 11706 flow. Second operand has 27 states, 27 states have (on average 5.148148148148148) internal successors, (139), 27 states have internal predecessors, (139), 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) [2025-04-14 01:01:39,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:01:39,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 33 [2025-04-14 01:01:39,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:01:44,393 INFO L116 PetriNetUnfolderBase]: 7227/11120 cut-off events. [2025-04-14 01:01:44,393 INFO L117 PetriNetUnfolderBase]: For 25015/25015 co-relation queries the response was YES. [2025-04-14 01:01:44,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57987 conditions, 11120 events. 7227/11120 cut-off events. For 25015/25015 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 67276 event pairs, 52 based on Foata normal form. 203/11314 useless extension candidates. Maximal degree in co-relation 57938. Up to 2391 conditions per place. [2025-04-14 01:01:44,465 INFO L140 encePairwiseOnDemand]: 17/33 looper letters, 836 selfloop transitions, 1757 changer transitions 135/2729 dead transitions. [2025-04-14 01:01:44,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 2729 transitions, 33760 flow [2025-04-14 01:01:44,466 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2025-04-14 01:01:44,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2025-04-14 01:01:44,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 1033 transitions. [2025-04-14 01:01:44,468 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2652799178222907 [2025-04-14 01:01:44,468 INFO L175 Difference]: Start difference. First operand has 291 places, 1050 transitions, 11706 flow. Second operand 118 states and 1033 transitions. [2025-04-14 01:01:44,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 2729 transitions, 33760 flow [2025-04-14 01:01:45,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 2729 transitions, 32436 flow, removed 381 selfloop flow, removed 28 redundant places. [2025-04-14 01:01:45,095 INFO L231 Difference]: Finished difference. Result has 400 places, 2121 transitions, 27945 flow [2025-04-14 01:01:45,096 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=11053, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1050, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=754, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=118, PETRI_FLOW=27945, PETRI_PLACES=400, PETRI_TRANSITIONS=2121} [2025-04-14 01:01:45,097 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 372 predicate places. [2025-04-14 01:01:45,097 INFO L485 AbstractCegarLoop]: Abstraction has has 400 places, 2121 transitions, 27945 flow [2025-04-14 01:01:45,097 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.148148148148148) internal successors, (139), 27 states have internal predecessors, (139), 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) [2025-04-14 01:01:45,097 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:01:45,097 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:01:45,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-04-14 01:01:45,297 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:01:45,298 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:01:45,298 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:01:45,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1063902232, now seen corresponding path program 5 times [2025-04-14 01:01:45,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:01:45,298 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93988579] [2025-04-14 01:01:45,298 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:01:45,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:01:45,306 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 3 equivalence classes. [2025-04-14 01:01:45,327 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-14 01:01:45,327 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 01:01:45,327 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:01:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 01:01:45,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:01:45,632 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93988579] [2025-04-14 01:01:45,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93988579] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:01:45,632 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831474049] [2025-04-14 01:01:45,632 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:01:45,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:01:45,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:01:45,634 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) [2025-04-14 01:01:45,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-04-14 01:01:45,683 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 26 statements into 3 equivalence classes. [2025-04-14 01:01:45,705 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 26 of 26 statements. [2025-04-14 01:01:45,706 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 01:01:45,706 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:01:45,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-04-14 01:01:45,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:01:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:01:45,860 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:01:45,996 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:01:45,996 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2025-04-14 01:01:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-04-14 01:01:46,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831474049] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:01:46,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:01:46,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 24 [2025-04-14 01:01:46,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335074808] [2025-04-14 01:01:46,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:01:46,072 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-04-14 01:01:46,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:01:46,073 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-04-14 01:01:46,073 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2025-04-14 01:01:46,073 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 33 [2025-04-14 01:01:46,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 2121 transitions, 27945 flow. Second operand has 26 states, 26 states have (on average 5.230769230769231) internal successors, (136), 26 states have internal predecessors, (136), 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) [2025-04-14 01:01:46,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:01:46,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 33 [2025-04-14 01:01:46,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:01:49,280 INFO L116 PetriNetUnfolderBase]: 7273/11312 cut-off events. [2025-04-14 01:01:49,280 INFO L117 PetriNetUnfolderBase]: For 35515/35515 co-relation queries the response was YES. [2025-04-14 01:01:49,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66596 conditions, 11312 events. 7273/11312 cut-off events. For 35515/35515 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 69833 event pairs, 92 based on Foata normal form. 3/11310 useless extension candidates. Maximal degree in co-relation 66532. Up to 4480 conditions per place. [2025-04-14 01:01:49,366 INFO L140 encePairwiseOnDemand]: 18/33 looper letters, 1179 selfloop transitions, 1169 changer transitions 22/2371 dead transitions. [2025-04-14 01:01:49,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 2371 transitions, 35454 flow [2025-04-14 01:01:49,367 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-04-14 01:01:49,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-04-14 01:01:49,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 243 transitions. [2025-04-14 01:01:49,368 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.262987012987013 [2025-04-14 01:01:49,368 INFO L175 Difference]: Start difference. First operand has 400 places, 2121 transitions, 27945 flow. Second operand 28 states and 243 transitions. [2025-04-14 01:01:49,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 2371 transitions, 35454 flow [2025-04-14 01:01:50,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 2371 transitions, 33752 flow, removed 725 selfloop flow, removed 15 redundant places. [2025-04-14 01:01:50,812 INFO L231 Difference]: Finished difference. Result has 413 places, 2203 transitions, 30061 flow [2025-04-14 01:01:50,813 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=26320, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1076, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1018, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=30061, PETRI_PLACES=413, PETRI_TRANSITIONS=2203} [2025-04-14 01:01:50,814 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 385 predicate places. [2025-04-14 01:01:50,814 INFO L485 AbstractCegarLoop]: Abstraction has has 413 places, 2203 transitions, 30061 flow [2025-04-14 01:01:50,814 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.230769230769231) internal successors, (136), 26 states have internal predecessors, (136), 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) [2025-04-14 01:01:50,814 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:01:50,814 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:01:50,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-04-14 01:01:51,014 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:01:51,015 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:01:51,015 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:01:51,015 INFO L85 PathProgramCache]: Analyzing trace with hash 456207649, now seen corresponding path program 6 times [2025-04-14 01:01:51,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:01:51,015 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282409770] [2025-04-14 01:01:51,016 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:01:51,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:01:51,023 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 3 equivalence classes. [2025-04-14 01:01:51,033 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-04-14 01:01:51,033 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 01:01:51,033 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:01:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-04-14 01:01:51,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:01:51,081 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282409770] [2025-04-14 01:01:51,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282409770] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:01:51,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:01:51,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-14 01:01:51,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041466943] [2025-04-14 01:01:51,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:01:51,081 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-14 01:01:51,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:01:51,082 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-14 01:01:51,082 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-04-14 01:01:51,082 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 33 [2025-04-14 01:01:51,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 2203 transitions, 30061 flow. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2025-04-14 01:01:51,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:01:51,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 33 [2025-04-14 01:01:51,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:01:55,642 INFO L116 PetriNetUnfolderBase]: 11856/18365 cut-off events. [2025-04-14 01:01:55,642 INFO L117 PetriNetUnfolderBase]: For 70977/70977 co-relation queries the response was YES. [2025-04-14 01:01:55,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112281 conditions, 18365 events. 11856/18365 cut-off events. For 70977/70977 co-relation queries the response was YES. Maximal size of possible extension queue 908. Compared 122989 event pairs, 628 based on Foata normal form. 288/18646 useless extension candidates. Maximal degree in co-relation 112220. Up to 9042 conditions per place. [2025-04-14 01:01:55,919 INFO L140 encePairwiseOnDemand]: 25/33 looper letters, 2644 selfloop transitions, 1166 changer transitions 0/3811 dead transitions. [2025-04-14 01:01:55,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 3811 transitions, 60401 flow [2025-04-14 01:01:55,920 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 01:01:55,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 01:01:55,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2025-04-14 01:01:55,920 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.503030303030303 [2025-04-14 01:01:55,920 INFO L175 Difference]: Start difference. First operand has 413 places, 2203 transitions, 30061 flow. Second operand 5 states and 83 transitions. [2025-04-14 01:01:55,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 3811 transitions, 60401 flow [2025-04-14 01:01:59,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 3811 transitions, 60259 flow, removed 18 selfloop flow, removed 13 redundant places. [2025-04-14 01:01:59,396 INFO L231 Difference]: Finished difference. Result has 407 places, 3036 transitions, 48099 flow [2025-04-14 01:01:59,398 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=29902, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=557, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=48099, PETRI_PLACES=407, PETRI_TRANSITIONS=3036} [2025-04-14 01:01:59,398 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 379 predicate places. [2025-04-14 01:01:59,398 INFO L485 AbstractCegarLoop]: Abstraction has has 407 places, 3036 transitions, 48099 flow [2025-04-14 01:01:59,399 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2025-04-14 01:01:59,399 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:01:59,399 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:01:59,399 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-04-14 01:01:59,399 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:01:59,399 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:01:59,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1826297394, now seen corresponding path program 1 times [2025-04-14 01:01:59,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:01:59,399 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821028081] [2025-04-14 01:01:59,399 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:01:59,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:01:59,405 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-04-14 01:01:59,414 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-04-14 01:01:59,414 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:01:59,414 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:01:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-04-14 01:01:59,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:01:59,508 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821028081] [2025-04-14 01:01:59,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821028081] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:01:59,508 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539529062] [2025-04-14 01:01:59,509 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:01:59,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:01:59,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:01:59,511 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) [2025-04-14 01:01:59,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-04-14 01:01:59,554 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-04-14 01:01:59,572 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-04-14 01:01:59,573 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:01:59,573 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:01:59,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-14 01:01:59,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:01:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:01:59,663 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:01:59,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:01:59,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539529062] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:01:59,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:01:59,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2025-04-14 01:01:59,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129731578] [2025-04-14 01:01:59,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:01:59,752 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 01:01:59,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:01:59,752 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 01:01:59,752 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2025-04-14 01:01:59,752 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 33 [2025-04-14 01:01:59,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 3036 transitions, 48099 flow. Second operand has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 21 states have internal predecessors, (114), 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) [2025-04-14 01:01:59,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:01:59,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 33 [2025-04-14 01:01:59,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:02:03,522 INFO L116 PetriNetUnfolderBase]: 5530/8603 cut-off events. [2025-04-14 01:02:03,522 INFO L117 PetriNetUnfolderBase]: For 45288/45288 co-relation queries the response was YES. [2025-04-14 01:02:03,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57007 conditions, 8603 events. 5530/8603 cut-off events. For 45288/45288 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 49818 event pairs, 1729 based on Foata normal form. 46/8642 useless extension candidates. Maximal degree in co-relation 56942. Up to 8413 conditions per place. [2025-04-14 01:02:03,589 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 1433 selfloop transitions, 7 changer transitions 50/1491 dead transitions. [2025-04-14 01:02:03,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 1491 transitions, 25791 flow [2025-04-14 01:02:03,590 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-04-14 01:02:03,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-04-14 01:02:03,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 121 transitions. [2025-04-14 01:02:03,591 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.2037037037037037 [2025-04-14 01:02:03,591 INFO L175 Difference]: Start difference. First operand has 407 places, 3036 transitions, 48099 flow. Second operand 18 states and 121 transitions. [2025-04-14 01:02:03,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 1491 transitions, 25791 flow [2025-04-14 01:02:04,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 1491 transitions, 23900 flow, removed 339 selfloop flow, removed 19 redundant places. [2025-04-14 01:02:04,638 INFO L231 Difference]: Finished difference. Result has 321 places, 1441 transitions, 20547 flow [2025-04-14 01:02:04,640 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=20879, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=20547, PETRI_PLACES=321, PETRI_TRANSITIONS=1441} [2025-04-14 01:02:04,641 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 293 predicate places. [2025-04-14 01:02:04,641 INFO L485 AbstractCegarLoop]: Abstraction has has 321 places, 1441 transitions, 20547 flow [2025-04-14 01:02:04,642 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 21 states have internal predecessors, (114), 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) [2025-04-14 01:02:04,642 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:02:04,642 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:02:04,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-04-14 01:02:04,842 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-04-14 01:02:04,842 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:02:04,843 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:02:04,843 INFO L85 PathProgramCache]: Analyzing trace with hash -913342025, now seen corresponding path program 2 times [2025-04-14 01:02:04,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:02:04,843 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906648375] [2025-04-14 01:02:04,843 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:02:04,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:02:04,848 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-04-14 01:02:04,865 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-04-14 01:02:04,865 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:02:04,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:02:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:02:06,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:02:06,171 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906648375] [2025-04-14 01:02:06,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906648375] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:02:06,171 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144304503] [2025-04-14 01:02:06,171 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:02:06,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:02:06,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:02:06,175 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) [2025-04-14 01:02:06,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-04-14 01:02:06,223 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-04-14 01:02:06,245 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-04-14 01:02:06,245 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:02:06,245 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:02:06,246 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 54 conjuncts are in the unsatisfiable core [2025-04-14 01:02:06,248 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:02:06,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:02:06,690 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:02:07,049 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:02:07,049 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 114 [2025-04-14 01:02:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:02:07,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144304503] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:02:07,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:02:07,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 48 [2025-04-14 01:02:07,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586387] [2025-04-14 01:02:07,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:02:07,345 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2025-04-14 01:02:07,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:02:07,345 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2025-04-14 01:02:07,346 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=2046, Unknown=0, NotChecked=0, Total=2450 [2025-04-14 01:02:07,346 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 33 [2025-04-14 01:02:07,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 1441 transitions, 20547 flow. Second operand has 50 states, 50 states have (on average 4.52) internal successors, (226), 50 states have internal predecessors, (226), 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) [2025-04-14 01:02:07,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:02:07,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 33 [2025-04-14 01:02:07,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:02:33,723 INFO L116 PetriNetUnfolderBase]: 35512/54588 cut-off events. [2025-04-14 01:02:33,723 INFO L117 PetriNetUnfolderBase]: For 339536/339536 co-relation queries the response was YES. [2025-04-14 01:02:34,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339145 conditions, 54588 events. 35512/54588 cut-off events. For 339536/339536 co-relation queries the response was YES. Maximal size of possible extension queue 1667. Compared 396868 event pairs, 125 based on Foata normal form. 1267/55839 useless extension candidates. Maximal degree in co-relation 339093. Up to 12044 conditions per place. [2025-04-14 01:02:34,446 INFO L140 encePairwiseOnDemand]: 16/33 looper letters, 1456 selfloop transitions, 8253 changer transitions 713/10423 dead transitions. [2025-04-14 01:02:34,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 581 places, 10423 transitions, 168291 flow [2025-04-14 01:02:34,447 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 300 states. [2025-04-14 01:02:34,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2025-04-14 01:02:34,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 2721 transitions. [2025-04-14 01:02:34,452 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.27484848484848484 [2025-04-14 01:02:34,453 INFO L175 Difference]: Start difference. First operand has 321 places, 1441 transitions, 20547 flow. Second operand 300 states and 2721 transitions. [2025-04-14 01:02:34,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 581 places, 10423 transitions, 168291 flow [2025-04-14 01:02:47,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 10423 transitions, 167378 flow, removed 95 selfloop flow, removed 13 redundant places. [2025-04-14 01:02:47,527 INFO L231 Difference]: Finished difference. Result has 634 places, 9040 transitions, 155545 flow [2025-04-14 01:02:47,529 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=20214, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=300, PETRI_FLOW=155545, PETRI_PLACES=634, PETRI_TRANSITIONS=9040} [2025-04-14 01:02:47,529 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 606 predicate places. [2025-04-14 01:02:47,529 INFO L485 AbstractCegarLoop]: Abstraction has has 634 places, 9040 transitions, 155545 flow [2025-04-14 01:02:47,530 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.52) internal successors, (226), 50 states have internal predecessors, (226), 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) [2025-04-14 01:02:47,530 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:02:47,530 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:02:47,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-04-14 01:02:47,734 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-04-14 01:02:47,734 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:02:47,735 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:02:47,735 INFO L85 PathProgramCache]: Analyzing trace with hash 568562171, now seen corresponding path program 3 times [2025-04-14 01:02:47,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:02:47,735 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552008228] [2025-04-14 01:02:47,735 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:02:47,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:02:47,744 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 3 equivalence classes. [2025-04-14 01:02:47,767 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 30 of 30 statements. [2025-04-14 01:02:47,768 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 01:02:47,768 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:02:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:02:48,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:02:48,439 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552008228] [2025-04-14 01:02:48,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552008228] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:02:48,439 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502678060] [2025-04-14 01:02:48,439 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:02:48,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:02:48,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:02:48,441 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) [2025-04-14 01:02:48,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-04-14 01:02:48,492 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 3 equivalence classes. [2025-04-14 01:02:48,515 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 30 of 30 statements. [2025-04-14 01:02:48,515 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 01:02:48,515 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:02:48,517 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 68 conjuncts are in the unsatisfiable core [2025-04-14 01:02:48,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:02:48,586 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-04-14 01:02:49,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:02:49,041 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:02:49,639 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 93 [2025-04-14 01:02:49,648 INFO L325 Elim1Store]: treesize reduction 25, result has 13.8 percent of original size [2025-04-14 01:02:49,648 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 112 [2025-04-14 01:02:49,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:02:49,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502678060] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:02:49,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:02:49,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 56 [2025-04-14 01:02:49,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3990874] [2025-04-14 01:02:49,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:02:49,838 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2025-04-14 01:02:49,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:02:49,838 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2025-04-14 01:02:49,839 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=728, Invalid=2578, Unknown=0, NotChecked=0, Total=3306 [2025-04-14 01:02:49,839 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 33 [2025-04-14 01:02:49,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 634 places, 9040 transitions, 155545 flow. Second operand has 58 states, 58 states have (on average 4.379310344827586) internal successors, (254), 58 states have internal predecessors, (254), 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) [2025-04-14 01:02:49,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:02:49,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 33 [2025-04-14 01:02:49,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:05:54,759 INFO L116 PetriNetUnfolderBase]: 78213/122389 cut-off events. [2025-04-14 01:05:54,760 INFO L117 PetriNetUnfolderBase]: For 1026359/1026359 co-relation queries the response was YES. [2025-04-14 01:05:57,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 859722 conditions, 122389 events. 78213/122389 cut-off events. For 1026359/1026359 co-relation queries the response was YES. Maximal size of possible extension queue 4224. Compared 1023424 event pairs, 86 based on Foata normal form. 60/122443 useless extension candidates. Maximal degree in co-relation 859605. Up to 30540 conditions per place. [2025-04-14 01:05:57,923 INFO L140 encePairwiseOnDemand]: 16/33 looper letters, 1373 selfloop transitions, 22782 changer transitions 1156/25312 dead transitions. [2025-04-14 01:05:57,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 865 places, 25312 transitions, 478064 flow [2025-04-14 01:05:57,924 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 237 states. [2025-04-14 01:05:57,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2025-04-14 01:05:57,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 1893 transitions. [2025-04-14 01:05:57,927 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.24204065976217876 [2025-04-14 01:05:57,927 INFO L175 Difference]: Start difference. First operand has 634 places, 9040 transitions, 155545 flow. Second operand 237 states and 1893 transitions. [2025-04-14 01:05:57,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 865 places, 25312 transitions, 478064 flow [2025-04-14 01:11:20,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 846 places, 25312 transitions, 458442 flow, removed 7134 selfloop flow, removed 19 redundant places. [2025-04-14 01:11:21,048 INFO L231 Difference]: Finished difference. Result has 893 places, 23746 transitions, 454436 flow [2025-04-14 01:11:21,054 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=148136, PETRI_DIFFERENCE_MINUEND_PLACES=610, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9038, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8626, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=237, PETRI_FLOW=454436, PETRI_PLACES=893, PETRI_TRANSITIONS=23746} [2025-04-14 01:11:21,055 INFO L279 CegarLoopForPetriNet]: 28 programPoint places, 865 predicate places. [2025-04-14 01:11:21,055 INFO L485 AbstractCegarLoop]: Abstraction has has 893 places, 23746 transitions, 454436 flow [2025-04-14 01:11:21,055 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 4.379310344827586) internal successors, (254), 58 states have internal predecessors, (254), 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) [2025-04-14 01:11:21,056 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:11:21,056 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:11:21,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-04-14 01:11:21,260 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-04-14 01:11:21,260 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:11:21,261 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:11:21,261 INFO L85 PathProgramCache]: Analyzing trace with hash 665705164, now seen corresponding path program 1 times [2025-04-14 01:11:21,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:11:21,261 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239879470] [2025-04-14 01:11:21,261 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:11:21,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:11:21,267 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-04-14 01:11:21,272 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-04-14 01:11:21,272 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:11:21,272 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:11:21,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2025-04-14 01:11:21,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:11:21,320 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239879470] [2025-04-14 01:11:21,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239879470] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:11:21,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:11:21,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-14 01:11:21,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355151120] [2025-04-14 01:11:21,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:11:21,321 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-14 01:11:21,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:11:21,321 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-14 01:11:21,321 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-14 01:11:21,321 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 33 [2025-04-14 01:11:21,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 893 places, 23746 transitions, 454436 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:11:21,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:11:21,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 33 [2025-04-14 01:11:21,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2025-04-14 01:13:41,367 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2025-04-14 01:13:41,977 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-14 01:13:41,979 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2025-04-14 01:13:41,979 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-04-14 01:13:41,980 WARN L610 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (3states, 3/33 universal loopers) in iteration 17,while PetriNetUnfolder was constructing finite prefix that currently has 161210 conditions, 21072 events (12415/21071 cut-off events. For 190063/190063 co-relation queries the response was YES. Maximal size of possible extension queue 1479. Compared 175169 event pairs, 3707 based on Foata normal form. 1349/23817 useless extension candidates. Maximal degree in co-relation 161060. Up to 14205 conditions per place.). [2025-04-14 01:13:41,981 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2025-04-14 01:13:41,982 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-04-14 01:13:41,982 INFO L422 BasicCegarLoop]: Path program histogram: [6, 3, 2, 1, 1, 1, 1, 1, 1] [2025-04-14 01:13:41,987 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-14 01:13:41,987 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-14 01:13:42,002 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.04 01:13:42 BasicIcfg [2025-04-14 01:13:42,003 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-14 01:13:42,008 INFO L158 Benchmark]: Toolchain (without parser) took 751663.40ms. Allocated memory was 142.6MB in the beginning and 2.4GB in the end (delta: 2.3GB). Free memory was 99.7MB in the beginning and 920.6MB in the end (delta: -820.9MB). Peak memory consumption was 4.4GB. Max. memory is 8.0GB. [2025-04-14 01:13:42,008 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 159.4MB. Free memory is still 88.5MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-14 01:13:42,008 INFO L158 Benchmark]: CACSL2BoogieTranslator took 228.07ms. Allocated memory is still 142.6MB. Free memory was 99.7MB in the beginning and 85.0MB in the end (delta: 14.7MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2025-04-14 01:13:42,008 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.77ms. Allocated memory is still 142.6MB. Free memory was 85.0MB in the beginning and 82.9MB in the end (delta: 2.0MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-14 01:13:42,008 INFO L158 Benchmark]: Boogie Preprocessor took 33.44ms. Allocated memory is still 142.6MB. Free memory was 82.9MB in the beginning and 81.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-14 01:13:42,008 INFO L158 Benchmark]: IcfgBuilder took 547.35ms. Allocated memory is still 142.6MB. Free memory was 81.3MB in the beginning and 38.3MB in the end (delta: 43.0MB). Peak memory consumption was 41.9MB. Max. memory is 8.0GB. [2025-04-14 01:13:42,009 INFO L158 Benchmark]: TraceAbstraction took 750814.55ms. Allocated memory was 142.6MB in the beginning and 2.4GB in the end (delta: 2.3GB). Free memory was 37.8MB in the beginning and 920.6MB in the end (delta: -882.9MB). Peak memory consumption was 4.4GB. Max. memory is 8.0GB. [2025-04-14 01:13:42,010 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 159.4MB. Free memory is still 88.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 228.07ms. Allocated memory is still 142.6MB. Free memory was 99.7MB in the beginning and 85.0MB in the end (delta: 14.7MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 35.77ms. Allocated memory is still 142.6MB. Free memory was 85.0MB in the beginning and 82.9MB in the end (delta: 2.0MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.44ms. Allocated memory is still 142.6MB. Free memory was 82.9MB in the beginning and 81.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 8.0GB. * IcfgBuilder took 547.35ms. Allocated memory is still 142.6MB. Free memory was 81.3MB in the beginning and 38.3MB in the end (delta: 43.0MB). Peak memory consumption was 41.9MB. Max. memory is 8.0GB. * TraceAbstraction took 750814.55ms. Allocated memory was 142.6MB in the beginning and 2.4GB in the end (delta: 2.3GB). Free memory was 37.8MB in the beginning and 920.6MB in the end (delta: -882.9MB). Peak memory consumption was 4.4GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (3states, 3/33 universal loopers) in iteration 17,while PetriNetUnfolder was constructing finite prefix that currently has 161210 conditions, 21072 events (12415/21071 cut-off events. For 190063/190063 co-relation queries the response was YES. Maximal size of possible extension queue 1479. Compared 175169 event pairs, 3707 based on Foata normal form. 1349/23817 useless extension candidates. Maximal degree in co-relation 161060. Up to 14205 conditions per place.). - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (3states, 3/33 universal loopers) in iteration 17,while PetriNetUnfolder was constructing finite prefix that currently has 161210 conditions, 21072 events (12415/21071 cut-off events. For 190063/190063 co-relation queries the response was YES. Maximal size of possible extension queue 1479. Compared 175169 event pairs, 3707 based on Foata normal form. 1349/23817 useless extension candidates. Maximal degree in co-relation 161060. Up to 14205 conditions per place.). - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (3states, 3/33 universal loopers) in iteration 17,while PetriNetUnfolder was constructing finite prefix that currently has 161210 conditions, 21072 events (12415/21071 cut-off events. For 190063/190063 co-relation queries the response was YES. Maximal size of possible extension queue 1479. Compared 175169 event pairs, 3707 based on Foata normal form. 1349/23817 useless extension candidates. Maximal degree in co-relation 161060. Up to 14205 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 37 locations, 53 edges, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 750.7s, OverallIterations: 17, TraceHistogramMax: 3, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 732.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5734 SdHoareTripleChecker+Valid, 11.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5734 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 10.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2043 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 19362 IncrementalHoareTripleChecker+Invalid, 21405 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2043 mSolverCounterUnsat, 0 mSDtfsCounter, 19362 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1570 GetRequests, 329 SyntacticMatches, 3 SemanticMatches, 1238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109412 ImplicationChecksByTransitivity, 42.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=454436occurred in iteration=16, InterpolantAutomatonStates: 1047, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 14.4s InterpolantComputationTime, 675 NumberOfCodeBlocks, 671 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 898 ConstructedInterpolants, 19 QuantifiedInterpolants, 14169 SizeOfPredicates, 128 NumberOfNonLiveVariables, 1998 ConjunctsInSsa, 352 ConjunctsInUnsatCore, 37 InterpolantComputations, 7 PerfectInterpolantSequences, 96/246 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown