/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/unroll-cond-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-14 01:40:44,500 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-14 01:40:44,552 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 01:40:44,558 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-14 01:40:44,559 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-14 01:40:44,578 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-14 01:40:44,579 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-14 01:40:44,579 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-14 01:40:44,579 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-14 01:40:44,580 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-14 01:40:44,580 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-14 01:40:44,580 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-14 01:40:44,581 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-14 01:40:44,581 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-14 01:40:44,581 INFO L153 SettingsManager]: * Use SBE=true [2025-04-14 01:40:44,581 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-14 01:40:44,581 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-14 01:40:44,581 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-14 01:40:44,581 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-14 01:40:44,581 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-14 01:40:44,581 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-14 01:40:44,581 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-14 01:40:44,582 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-14 01:40:44,582 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-14 01:40:44,582 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-14 01:40:44,582 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-14 01:40:44,582 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-14 01:40:44,582 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-14 01:40:44,582 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-14 01:40:44,582 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-14 01:40:44,582 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-14 01:40:44,582 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-14 01:40:44,582 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 01:40:44,582 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-14 01:40:44,582 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-14 01:40:44,582 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-14 01:40:44,582 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-14 01:40:44,583 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 01:40:44,583 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-14 01:40:44,583 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-14 01:40:44,583 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-14 01:40:44,583 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-14 01:40:44,583 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-14 01:40:44,583 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-14 01:40:44,583 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-14 01:40:44,583 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-14 01:40:44,583 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-14 01:40:44,583 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 01:40:44,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-14 01:40:44,795 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-14 01:40:44,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-14 01:40:44,799 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-14 01:40:44,800 INFO L274 PluginConnector]: CDTParser initialized [2025-04-14 01:40:44,801 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c [2025-04-14 01:40:46,110 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b9f4b0d1/a13ff87edc1b4e268696f746e0fe2d74/FLAG467d7cd38 [2025-04-14 01:40:46,293 INFO L389 CDTParser]: Found 1 translation units. [2025-04-14 01:40:46,294 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c [2025-04-14 01:40:46,304 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b9f4b0d1/a13ff87edc1b4e268696f746e0fe2d74/FLAG467d7cd38 [2025-04-14 01:40:47,312 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b9f4b0d1/a13ff87edc1b4e268696f746e0fe2d74 [2025-04-14 01:40:47,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-14 01:40:47,315 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-14 01:40:47,320 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-14 01:40:47,320 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-14 01:40:47,323 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-14 01:40:47,323 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.04 01:40:47" (1/1) ... [2025-04-14 01:40:47,324 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a09e172 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:40:47, skipping insertion in model container [2025-04-14 01:40:47,324 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.04 01:40:47" (1/1) ... [2025-04-14 01:40:47,334 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-14 01:40:47,481 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/unroll-cond-2.wvr.c[2500,2513] [2025-04-14 01:40:47,493 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-14 01:40:47,502 INFO L200 MainTranslator]: Completed pre-run [2025-04-14 01:40:47,522 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/unroll-cond-2.wvr.c[2500,2513] [2025-04-14 01:40:47,524 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-14 01:40:47,537 INFO L204 MainTranslator]: Completed translation [2025-04-14 01:40:47,537 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:40:47 WrapperNode [2025-04-14 01:40:47,537 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-14 01:40:47,538 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-14 01:40:47,538 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-14 01:40:47,538 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-14 01:40:47,542 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:40:47" (1/1) ... [2025-04-14 01:40:47,548 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:40:47" (1/1) ... [2025-04-14 01:40:47,564 INFO L138 Inliner]: procedures = 23, calls = 23, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 125 [2025-04-14 01:40:47,564 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-14 01:40:47,565 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-14 01:40:47,565 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-14 01:40:47,565 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-14 01:40:47,571 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:40:47" (1/1) ... [2025-04-14 01:40:47,571 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:40:47" (1/1) ... [2025-04-14 01:40:47,572 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:40:47" (1/1) ... [2025-04-14 01:40:47,590 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 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 01:40:47,590 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:40:47" (1/1) ... [2025-04-14 01:40:47,590 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:40:47" (1/1) ... [2025-04-14 01:40:47,596 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:40:47" (1/1) ... [2025-04-14 01:40:47,596 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:40:47" (1/1) ... [2025-04-14 01:40:47,597 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:40:47" (1/1) ... [2025-04-14 01:40:47,602 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:40:47" (1/1) ... [2025-04-14 01:40:47,605 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-14 01:40:47,610 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-04-14 01:40:47,610 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-04-14 01:40:47,610 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-04-14 01:40:47,611 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:40:47" (1/1) ... [2025-04-14 01:40:47,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 01:40:47,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:40:47,635 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 01:40:47,638 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 01:40:47,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-14 01:40:47,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-14 01:40:47,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-14 01:40:47,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-14 01:40:47,655 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-14 01:40:47,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-14 01:40:47,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-14 01:40:47,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-04-14 01:40:47,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-04-14 01:40:47,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-04-14 01:40:47,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-14 01:40:47,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-14 01:40:47,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-14 01:40:47,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-04-14 01:40:47,656 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 01:40:47,736 INFO L256 CfgBuilder]: Building ICFG [2025-04-14 01:40:47,738 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-14 01:40:47,952 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-14 01:40:47,953 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-14 01:40:47,953 INFO L318 CfgBuilder]: Performing block encoding [2025-04-14 01:40:48,145 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-14 01:40:48,145 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.04 01:40:48 BoogieIcfgContainer [2025-04-14 01:40:48,145 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-04-14 01:40:48,149 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-14 01:40:48,149 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-14 01:40:48,152 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-14 01:40:48,152 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.04 01:40:47" (1/3) ... [2025-04-14 01:40:48,153 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e80b1b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.04 01:40:48, skipping insertion in model container [2025-04-14 01:40:48,153 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:40:47" (2/3) ... [2025-04-14 01:40:48,153 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e80b1b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.04 01:40:48, skipping insertion in model container [2025-04-14 01:40:48,153 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.04 01:40:48" (3/3) ... [2025-04-14 01:40:48,154 INFO L128 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2025-04-14 01:40:48,181 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-14 01:40:48,182 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-cond-2.wvr.c that has 3 procedures, 17 locations, 17 edges, 1 initial locations, 3 loop locations, and 1 error locations. [2025-04-14 01:40:48,182 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-14 01:40:48,216 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-14 01:40:48,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 23 places, 19 transitions, 52 flow [2025-04-14 01:40:48,257 INFO L116 PetriNetUnfolderBase]: 3/17 cut-off events. [2025-04-14 01:40:48,260 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-14 01:40:48,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 17 events. 3/17 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2025-04-14 01:40:48,261 INFO L82 GeneralOperation]: Start removeDead. Operand has 23 places, 19 transitions, 52 flow [2025-04-14 01:40:48,267 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 16 transitions, 44 flow [2025-04-14 01:40:48,271 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-14 01:40:48,277 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;@4a649d33, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-14 01:40:48,278 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-14 01:40:48,286 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-14 01:40:48,286 INFO L116 PetriNetUnfolderBase]: 3/15 cut-off events. [2025-04-14 01:40:48,286 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-14 01:40:48,287 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:40:48,287 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:40:48,287 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 01:40:48,290 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:40:48,290 INFO L85 PathProgramCache]: Analyzing trace with hash -590035340, now seen corresponding path program 1 times [2025-04-14 01:40:48,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:40:48,296 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708039715] [2025-04-14 01:40:48,296 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:40:48,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:40:48,354 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-04-14 01:40:48,388 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-04-14 01:40:48,388 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:40:48,388 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:40:48,609 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 01:40:48,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:40:48,611 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708039715] [2025-04-14 01:40:48,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708039715] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:40:48,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:40:48,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-14 01:40:48,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805810942] [2025-04-14 01:40:48,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:40:48,618 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-14 01:40:48,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:40:48,633 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-14 01:40:48,634 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-14 01:40:48,635 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:40:48,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 01:40:48,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:40:48,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:40:48,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:40:48,700 INFO L116 PetriNetUnfolderBase]: 38/70 cut-off events. [2025-04-14 01:40:48,700 INFO L117 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-04-14 01:40:48,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 70 events. 38/70 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 118 event pairs, 22 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 120. Up to 70 conditions per place. [2025-04-14 01:40:48,703 INFO L140 encePairwiseOnDemand]: 16/19 looper letters, 15 selfloop transitions, 2 changer transitions 0/17 dead transitions. [2025-04-14 01:40:48,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 17 transitions, 80 flow [2025-04-14 01:40:48,704 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-14 01:40:48,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-14 01:40:48,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 24 transitions. [2025-04-14 01:40:48,711 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2025-04-14 01:40:48,712 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 44 flow. Second operand 3 states and 24 transitions. [2025-04-14 01:40:48,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 17 transitions, 80 flow [2025-04-14 01:40:48,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 17 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-04-14 01:40:48,717 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 48 flow [2025-04-14 01:40:48,718 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2025-04-14 01:40:48,721 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2025-04-14 01:40:48,721 INFO L485 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 48 flow [2025-04-14 01:40:48,721 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 01:40:48,721 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:40:48,721 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:40:48,722 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-14 01:40:48,722 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 01:40:48,723 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:40:48,723 INFO L85 PathProgramCache]: Analyzing trace with hash -426922623, now seen corresponding path program 1 times [2025-04-14 01:40:48,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:40:48,723 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726768181] [2025-04-14 01:40:48,724 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:40:48,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:40:48,738 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-04-14 01:40:48,760 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-14 01:40:48,760 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:40:48,760 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:40:49,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:40:49,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:40:49,016 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726768181] [2025-04-14 01:40:49,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726768181] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:40:49,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:40:49,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-14 01:40:49,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945460565] [2025-04-14 01:40:49,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:40:49,017 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-14 01:40:49,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:40:49,017 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-14 01:40:49,017 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-04-14 01:40:49,018 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:40:49,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 48 flow. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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 01:40:49,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:40:49,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:40:49,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:40:49,167 INFO L116 PetriNetUnfolderBase]: 67/122 cut-off events. [2025-04-14 01:40:49,167 INFO L117 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-04-14 01:40:49,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 122 events. 67/122 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 337 event pairs, 2 based on Foata normal form. 1/94 useless extension candidates. Maximal degree in co-relation 248. Up to 77 conditions per place. [2025-04-14 01:40:49,168 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 30 selfloop transitions, 11 changer transitions 2/43 dead transitions. [2025-04-14 01:40:49,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 43 transitions, 192 flow [2025-04-14 01:40:49,170 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-14 01:40:49,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-14 01:40:49,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 56 transitions. [2025-04-14 01:40:49,172 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.49122807017543857 [2025-04-14 01:40:49,172 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 48 flow. Second operand 6 states and 56 transitions. [2025-04-14 01:40:49,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 43 transitions, 192 flow [2025-04-14 01:40:49,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 43 transitions, 188 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-04-14 01:40:49,173 INFO L231 Difference]: Finished difference. Result has 26 places, 27 transitions, 112 flow [2025-04-14 01:40:49,173 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=112, PETRI_PLACES=26, PETRI_TRANSITIONS=27} [2025-04-14 01:40:49,174 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 6 predicate places. [2025-04-14 01:40:49,174 INFO L485 AbstractCegarLoop]: Abstraction has has 26 places, 27 transitions, 112 flow [2025-04-14 01:40:49,174 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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 01:40:49,174 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:40:49,174 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:40:49,174 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-14 01:40:49,174 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 01:40:49,175 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:40:49,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1711427591, now seen corresponding path program 2 times [2025-04-14 01:40:49,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:40:49,178 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098026822] [2025-04-14 01:40:49,178 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:40:49,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:40:49,190 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-04-14 01:40:49,207 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 13 of 14 statements. [2025-04-14 01:40:49,207 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-14 01:40:49,207 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:40:49,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:40:49,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:40:49,399 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098026822] [2025-04-14 01:40:49,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098026822] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:40:49,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:40:49,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-14 01:40:49,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211398145] [2025-04-14 01:40:49,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:40:49,399 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-14 01:40:49,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:40:49,400 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-14 01:40:49,400 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-04-14 01:40:49,400 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:40:49,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 27 transitions, 112 flow. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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 01:40:49,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:40:49,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:40:49,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:40:49,511 INFO L116 PetriNetUnfolderBase]: 67/124 cut-off events. [2025-04-14 01:40:49,511 INFO L117 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2025-04-14 01:40:49,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 124 events. 67/124 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 326 event pairs, 0 based on Foata normal form. 1/103 useless extension candidates. Maximal degree in co-relation 361. Up to 77 conditions per place. [2025-04-14 01:40:49,512 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 29 selfloop transitions, 15 changer transitions 2/46 dead transitions. [2025-04-14 01:40:49,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 46 transitions, 266 flow [2025-04-14 01:40:49,515 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-14 01:40:49,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-14 01:40:49,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 57 transitions. [2025-04-14 01:40:49,515 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2025-04-14 01:40:49,515 INFO L175 Difference]: Start difference. First operand has 26 places, 27 transitions, 112 flow. Second operand 7 states and 57 transitions. [2025-04-14 01:40:49,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 46 transitions, 266 flow [2025-04-14 01:40:49,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 46 transitions, 258 flow, removed 4 selfloop flow, removed 0 redundant places. [2025-04-14 01:40:49,517 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 171 flow [2025-04-14 01:40:49,517 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=171, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2025-04-14 01:40:49,517 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 14 predicate places. [2025-04-14 01:40:49,518 INFO L485 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 171 flow [2025-04-14 01:40:49,518 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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 01:40:49,518 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:40:49,518 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:40:49,518 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-14 01:40:49,518 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 01:40:49,518 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:40:49,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1031517139, now seen corresponding path program 3 times [2025-04-14 01:40:49,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:40:49,519 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045574935] [2025-04-14 01:40:49,519 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:40:49,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:40:49,527 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 14 statements into 2 equivalence classes. [2025-04-14 01:40:49,537 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 13 of 14 statements. [2025-04-14 01:40:49,538 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-04-14 01:40:49,538 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:40:49,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:40:49,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:40:49,668 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045574935] [2025-04-14 01:40:49,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045574935] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:40:49,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:40:49,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-14 01:40:49,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911453669] [2025-04-14 01:40:49,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:40:49,668 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-14 01:40:49,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:40:49,668 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-14 01:40:49,668 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-04-14 01:40:49,668 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:40:49,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 171 flow. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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 01:40:49,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:40:49,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:40:49,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:40:49,772 INFO L116 PetriNetUnfolderBase]: 83/156 cut-off events. [2025-04-14 01:40:49,773 INFO L117 PetriNetUnfolderBase]: For 107/107 co-relation queries the response was YES. [2025-04-14 01:40:49,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 541 conditions, 156 events. 83/156 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 457 event pairs, 6 based on Foata normal form. 1/128 useless extension candidates. Maximal degree in co-relation 518. Up to 58 conditions per place. [2025-04-14 01:40:49,774 INFO L140 encePairwiseOnDemand]: 11/19 looper letters, 35 selfloop transitions, 19 changer transitions 2/56 dead transitions. [2025-04-14 01:40:49,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 56 transitions, 366 flow [2025-04-14 01:40:49,774 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-04-14 01:40:49,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-04-14 01:40:49,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 68 transitions. [2025-04-14 01:40:49,775 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4473684210526316 [2025-04-14 01:40:49,775 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 171 flow. Second operand 8 states and 68 transitions. [2025-04-14 01:40:49,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 56 transitions, 366 flow [2025-04-14 01:40:49,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 56 transitions, 339 flow, removed 9 selfloop flow, removed 2 redundant places. [2025-04-14 01:40:49,777 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 230 flow [2025-04-14 01:40:49,777 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=230, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2025-04-14 01:40:49,778 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 22 predicate places. [2025-04-14 01:40:49,779 INFO L485 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 230 flow [2025-04-14 01:40:49,780 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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 01:40:49,780 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:40:49,789 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:40:49,789 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-14 01:40:49,789 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 01:40:49,790 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:40:49,790 INFO L85 PathProgramCache]: Analyzing trace with hash 2040304168, now seen corresponding path program 1 times [2025-04-14 01:40:49,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:40:49,790 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921196173] [2025-04-14 01:40:49,790 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:40:49,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:40:49,796 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-04-14 01:40:49,815 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 01:40:49,815 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:40:49,815 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:40:49,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:40:49,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:40:49,914 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921196173] [2025-04-14 01:40:49,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921196173] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:40:49,914 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379180383] [2025-04-14 01:40:49,914 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:40:49,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:40:49,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:40:49,919 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 01:40:49,921 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 01:40:49,960 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-04-14 01:40:49,977 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 01:40:49,977 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:40:49,977 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:40:49,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-04-14 01:40:49,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:40:50,042 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 01:40:50,249 INFO L325 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2025-04-14 01:40:50,249 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 60 [2025-04-14 01:40:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:40:50,270 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:40:50,643 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 190 treesize of output 168 [2025-04-14 01:40:50,705 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:40:50,705 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 491 treesize of output 403 [2025-04-14 01:40:54,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:40:54,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379180383] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:40:54,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:40:54,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2025-04-14 01:40:54,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154286510] [2025-04-14 01:40:54,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:40:54,691 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-14 01:40:54,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:40:54,691 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-14 01:40:54,691 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2025-04-14 01:40:54,691 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:40:54,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 230 flow. Second operand has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:40:54,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:40:54,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:40:54,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:40:55,313 INFO L116 PetriNetUnfolderBase]: 246/442 cut-off events. [2025-04-14 01:40:55,314 INFO L117 PetriNetUnfolderBase]: For 715/715 co-relation queries the response was YES. [2025-04-14 01:40:55,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1691 conditions, 442 events. 246/442 cut-off events. For 715/715 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1725 event pairs, 23 based on Foata normal form. 12/452 useless extension candidates. Maximal degree in co-relation 1092. Up to 155 conditions per place. [2025-04-14 01:40:55,317 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 57 selfloop transitions, 30 changer transitions 52/139 dead transitions. [2025-04-14 01:40:55,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 139 transitions, 992 flow [2025-04-14 01:40:55,319 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-04-14 01:40:55,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-04-14 01:40:55,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 176 transitions. [2025-04-14 01:40:55,321 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2025-04-14 01:40:55,321 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 230 flow. Second operand 22 states and 176 transitions. [2025-04-14 01:40:55,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 139 transitions, 992 flow [2025-04-14 01:40:55,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 139 transitions, 937 flow, removed 5 selfloop flow, removed 5 redundant places. [2025-04-14 01:40:55,328 INFO L231 Difference]: Finished difference. Result has 68 places, 48 transitions, 393 flow [2025-04-14 01:40:55,329 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=393, PETRI_PLACES=68, PETRI_TRANSITIONS=48} [2025-04-14 01:40:55,329 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 48 predicate places. [2025-04-14 01:40:55,329 INFO L485 AbstractCegarLoop]: Abstraction has has 68 places, 48 transitions, 393 flow [2025-04-14 01:40:55,329 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:40:55,329 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:40:55,329 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:40:55,337 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 01:40:55,534 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:40:55,534 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 01:40:55,534 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:40:55,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1653242420, now seen corresponding path program 1 times [2025-04-14 01:40:55,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:40:55,535 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781398429] [2025-04-14 01:40:55,535 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:40:55,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:40:55,540 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-04-14 01:40:55,550 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 01:40:55,551 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:40:55,551 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:40:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:40:55,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:40:55,781 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781398429] [2025-04-14 01:40:55,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781398429] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:40:55,781 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315093136] [2025-04-14 01:40:55,781 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:40:55,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:40:55,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:40:55,783 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 01:40:55,784 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 01:40:55,818 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-04-14 01:40:55,830 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 01:40:55,831 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:40:55,831 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:40:55,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 01:40:55,832 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:40:55,904 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 15 treesize of output 7 [2025-04-14 01:40:55,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:40:55,907 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:40:56,014 INFO L325 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-04-14 01:40:56,015 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 42 treesize of output 22 [2025-04-14 01:40:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:40:56,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315093136] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:40:56,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:40:56,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2025-04-14 01:40:56,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647231450] [2025-04-14 01:40:56,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:40:56,062 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-14 01:40:56,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:40:56,062 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-14 01:40:56,062 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2025-04-14 01:40:56,062 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:40:56,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 48 transitions, 393 flow. Second operand has 16 states, 16 states have (on average 4.5625) internal successors, (73), 16 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:40:56,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:40:56,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:40:56,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:40:56,307 INFO L116 PetriNetUnfolderBase]: 197/360 cut-off events. [2025-04-14 01:40:56,307 INFO L117 PetriNetUnfolderBase]: For 1148/1148 co-relation queries the response was YES. [2025-04-14 01:40:56,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1700 conditions, 360 events. 197/360 cut-off events. For 1148/1148 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1366 event pairs, 9 based on Foata normal form. 1/359 useless extension candidates. Maximal degree in co-relation 1653. Up to 211 conditions per place. [2025-04-14 01:40:56,312 INFO L140 encePairwiseOnDemand]: 10/19 looper letters, 52 selfloop transitions, 31 changer transitions 3/86 dead transitions. [2025-04-14 01:40:56,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 86 transitions, 766 flow [2025-04-14 01:40:56,313 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-04-14 01:40:56,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-04-14 01:40:56,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 84 transitions. [2025-04-14 01:40:56,313 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4421052631578947 [2025-04-14 01:40:56,313 INFO L175 Difference]: Start difference. First operand has 68 places, 48 transitions, 393 flow. Second operand 10 states and 84 transitions. [2025-04-14 01:40:56,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 86 transitions, 766 flow [2025-04-14 01:40:56,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 86 transitions, 667 flow, removed 36 selfloop flow, removed 10 redundant places. [2025-04-14 01:40:56,322 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 492 flow [2025-04-14 01:40:56,322 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=492, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2025-04-14 01:40:56,323 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 41 predicate places. [2025-04-14 01:40:56,323 INFO L485 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 492 flow [2025-04-14 01:40:56,324 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 16 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:40:56,324 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:40:56,324 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:40:56,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-04-14 01:40:56,524 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 01:40:56,524 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 01:40:56,525 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:40:56,525 INFO L85 PathProgramCache]: Analyzing trace with hash -738956630, now seen corresponding path program 2 times [2025-04-14 01:40:56,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:40:56,525 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346652715] [2025-04-14 01:40:56,525 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:40:56,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:40:56,530 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-14 01:40:56,545 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 01:40:56,545 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:40:56,545 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:40:56,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:40:56,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:40:56,741 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346652715] [2025-04-14 01:40:56,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346652715] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:40:56,742 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120842938] [2025-04-14 01:40:56,742 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:40:56,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:40:56,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:40:56,743 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 01:40:56,745 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 01:40:56,784 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-14 01:40:56,801 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 01:40:56,801 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:40:56,801 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:40:56,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-04-14 01:40:56,803 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:40:56,873 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 15 treesize of output 7 [2025-04-14 01:40:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:40:56,875 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:40:57,011 INFO L325 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-04-14 01:40:57,011 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 7 [2025-04-14 01:40:57,018 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 11 treesize of output 3 [2025-04-14 01:40:57,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:40:57,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120842938] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:40:57,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:40:57,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2025-04-14 01:40:57,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414230791] [2025-04-14 01:40:57,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:40:57,053 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-04-14 01:40:57,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:40:57,054 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-04-14 01:40:57,054 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-04-14 01:40:57,054 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:40:57,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 492 flow. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:40:57,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:40:57,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:40:57,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:40:57,167 INFO L116 PetriNetUnfolderBase]: 199/368 cut-off events. [2025-04-14 01:40:57,167 INFO L117 PetriNetUnfolderBase]: For 1043/1043 co-relation queries the response was YES. [2025-04-14 01:40:57,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1714 conditions, 368 events. 199/368 cut-off events. For 1043/1043 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1402 event pairs, 33 based on Foata normal form. 1/369 useless extension candidates. Maximal degree in co-relation 1594. Up to 278 conditions per place. [2025-04-14 01:40:57,170 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 49 selfloop transitions, 23 changer transitions 3/75 dead transitions. [2025-04-14 01:40:57,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 75 transitions, 715 flow [2025-04-14 01:40:57,170 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-14 01:40:57,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-14 01:40:57,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 57 transitions. [2025-04-14 01:40:57,170 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2025-04-14 01:40:57,171 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 492 flow. Second operand 7 states and 57 transitions. [2025-04-14 01:40:57,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 75 transitions, 715 flow [2025-04-14 01:40:57,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 75 transitions, 665 flow, removed 15 selfloop flow, removed 4 redundant places. [2025-04-14 01:40:57,175 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 526 flow [2025-04-14 01:40:57,175 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=526, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2025-04-14 01:40:57,175 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 45 predicate places. [2025-04-14 01:40:57,175 INFO L485 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 526 flow [2025-04-14 01:40:57,175 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:40:57,176 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:40:57,176 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:40:57,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-04-14 01:40:57,376 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:40:57,376 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 01:40:57,377 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:40:57,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1676437226, now seen corresponding path program 3 times [2025-04-14 01:40:57,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:40:57,377 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932575756] [2025-04-14 01:40:57,377 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:40:57,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:40:57,382 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-04-14 01:40:57,396 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 01:40:57,397 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:40:57,397 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:40:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:40:57,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:40:57,570 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932575756] [2025-04-14 01:40:57,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932575756] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:40:57,570 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085492629] [2025-04-14 01:40:57,570 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:40:57,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:40:57,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:40:57,573 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 01:40:57,574 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 01:40:57,609 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-04-14 01:40:57,622 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 01:40:57,622 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:40:57,622 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:40:57,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-04-14 01:40:57,624 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:40:57,713 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 15 treesize of output 7 [2025-04-14 01:40:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:40:57,718 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:40:57,764 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:40:57,764 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 81 treesize of output 73 [2025-04-14 01:40:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:40:57,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085492629] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:40:57,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:40:57,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 12 [2025-04-14 01:40:57,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040329579] [2025-04-14 01:40:57,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:40:57,863 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-14 01:40:57,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:40:57,863 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-14 01:40:57,863 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2025-04-14 01:40:57,863 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:40:57,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 526 flow. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:40:57,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:40:57,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:40:57,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:40:58,076 INFO L116 PetriNetUnfolderBase]: 211/418 cut-off events. [2025-04-14 01:40:58,076 INFO L117 PetriNetUnfolderBase]: For 1137/1137 co-relation queries the response was YES. [2025-04-14 01:40:58,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1913 conditions, 418 events. 211/418 cut-off events. For 1137/1137 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1806 event pairs, 0 based on Foata normal form. 1/419 useless extension candidates. Maximal degree in co-relation 1754. Up to 215 conditions per place. [2025-04-14 01:40:58,079 INFO L140 encePairwiseOnDemand]: 10/19 looper letters, 59 selfloop transitions, 38 changer transitions 8/105 dead transitions. [2025-04-14 01:40:58,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 105 transitions, 954 flow [2025-04-14 01:40:58,079 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-04-14 01:40:58,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-04-14 01:40:58,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 96 transitions. [2025-04-14 01:40:58,080 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3609022556390977 [2025-04-14 01:40:58,080 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 526 flow. Second operand 14 states and 96 transitions. [2025-04-14 01:40:58,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 105 transitions, 954 flow [2025-04-14 01:40:58,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 105 transitions, 915 flow, removed 4 selfloop flow, removed 3 redundant places. [2025-04-14 01:40:58,098 INFO L231 Difference]: Finished difference. Result has 78 places, 71 transitions, 690 flow [2025-04-14 01:40:58,098 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=690, PETRI_PLACES=78, PETRI_TRANSITIONS=71} [2025-04-14 01:40:58,099 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 58 predicate places. [2025-04-14 01:40:58,099 INFO L485 AbstractCegarLoop]: Abstraction has has 78 places, 71 transitions, 690 flow [2025-04-14 01:40:58,099 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:40:58,099 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:40:58,099 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:40:58,108 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 01:40:58,306 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:40:58,306 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 01:40:58,307 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:40:58,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1764047393, now seen corresponding path program 2 times [2025-04-14 01:40:58,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:40:58,307 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163661816] [2025-04-14 01:40:58,307 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:40:58,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:40:58,313 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-14 01:40:58,323 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 01:40:58,323 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:40:58,323 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:40:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:40:58,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:40:58,423 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163661816] [2025-04-14 01:40:58,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163661816] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:40:58,423 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522577294] [2025-04-14 01:40:58,423 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:40:58,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:40:58,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:40:58,425 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 01:40:58,426 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 01:40:58,464 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-14 01:40:58,501 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 01:40:58,501 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:40:58,501 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:40:58,502 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-04-14 01:40:58,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:40:58,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:40:58,551 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:40:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:40:58,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522577294] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:40:58,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:40:58,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-04-14 01:40:58,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554485290] [2025-04-14 01:40:58,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:40:58,631 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-04-14 01:40:58,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:40:58,631 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-04-14 01:40:58,631 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2025-04-14 01:40:58,631 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:40:58,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 71 transitions, 690 flow. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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 01:40:58,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:40:58,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:40:58,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:40:59,006 INFO L116 PetriNetUnfolderBase]: 350/669 cut-off events. [2025-04-14 01:40:59,007 INFO L117 PetriNetUnfolderBase]: For 2970/2970 co-relation queries the response was YES. [2025-04-14 01:40:59,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3552 conditions, 669 events. 350/669 cut-off events. For 2970/2970 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3228 event pairs, 47 based on Foata normal form. 14/683 useless extension candidates. Maximal degree in co-relation 3457. Up to 213 conditions per place. [2025-04-14 01:40:59,011 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 101 selfloop transitions, 78 changer transitions 0/179 dead transitions. [2025-04-14 01:40:59,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 179 transitions, 1978 flow [2025-04-14 01:40:59,011 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-04-14 01:40:59,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-04-14 01:40:59,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 136 transitions. [2025-04-14 01:40:59,012 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4473684210526316 [2025-04-14 01:40:59,012 INFO L175 Difference]: Start difference. First operand has 78 places, 71 transitions, 690 flow. Second operand 16 states and 136 transitions. [2025-04-14 01:40:59,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 179 transitions, 1978 flow [2025-04-14 01:40:59,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 179 transitions, 1740 flow, removed 83 selfloop flow, removed 11 redundant places. [2025-04-14 01:40:59,023 INFO L231 Difference]: Finished difference. Result has 92 places, 128 transitions, 1465 flow [2025-04-14 01:40:59,023 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1465, PETRI_PLACES=92, PETRI_TRANSITIONS=128} [2025-04-14 01:40:59,024 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 72 predicate places. [2025-04-14 01:40:59,024 INFO L485 AbstractCegarLoop]: Abstraction has has 92 places, 128 transitions, 1465 flow [2025-04-14 01:40:59,024 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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 01:40:59,024 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:40:59,024 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:40:59,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-04-14 01:40:59,224 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:40:59,224 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 01:40:59,225 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:40:59,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1844310113, now seen corresponding path program 3 times [2025-04-14 01:40:59,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:40:59,225 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305312786] [2025-04-14 01:40:59,225 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:40:59,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:40:59,229 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-04-14 01:40:59,236 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 01:40:59,236 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:40:59,236 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:40:59,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:40:59,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:40:59,306 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305312786] [2025-04-14 01:40:59,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305312786] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:40:59,306 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545775401] [2025-04-14 01:40:59,306 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:40:59,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:40:59,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:40:59,308 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 01:40:59,309 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 01:40:59,344 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-04-14 01:40:59,367 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 01:40:59,367 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:40:59,367 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:40:59,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-04-14 01:40:59,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:40:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:40:59,385 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:40:59,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:40:59,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545775401] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:40:59,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:40:59,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2025-04-14 01:40:59,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933283199] [2025-04-14 01:40:59,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:40:59,461 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-04-14 01:40:59,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:40:59,462 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-04-14 01:40:59,462 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2025-04-14 01:40:59,462 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:40:59,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 128 transitions, 1465 flow. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 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 01:40:59,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:40:59,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:40:59,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:40:59,887 INFO L116 PetriNetUnfolderBase]: 356/693 cut-off events. [2025-04-14 01:40:59,887 INFO L117 PetriNetUnfolderBase]: For 3847/3847 co-relation queries the response was YES. [2025-04-14 01:40:59,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4055 conditions, 693 events. 356/693 cut-off events. For 3847/3847 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3455 event pairs, 35 based on Foata normal form. 15/707 useless extension candidates. Maximal degree in co-relation 3863. Up to 206 conditions per place. [2025-04-14 01:40:59,892 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 91 selfloop transitions, 99 changer transitions 0/190 dead transitions. [2025-04-14 01:40:59,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 190 transitions, 2266 flow [2025-04-14 01:40:59,892 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-04-14 01:40:59,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-04-14 01:40:59,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 133 transitions. [2025-04-14 01:40:59,893 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2025-04-14 01:40:59,893 INFO L175 Difference]: Start difference. First operand has 92 places, 128 transitions, 1465 flow. Second operand 17 states and 133 transitions. [2025-04-14 01:40:59,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 190 transitions, 2266 flow [2025-04-14 01:40:59,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 190 transitions, 2066 flow, removed 100 selfloop flow, removed 0 redundant places. [2025-04-14 01:40:59,907 INFO L231 Difference]: Finished difference. Result has 111 places, 141 transitions, 1671 flow [2025-04-14 01:40:59,908 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1301, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1671, PETRI_PLACES=111, PETRI_TRANSITIONS=141} [2025-04-14 01:40:59,908 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 91 predicate places. [2025-04-14 01:40:59,908 INFO L485 AbstractCegarLoop]: Abstraction has has 111 places, 141 transitions, 1671 flow [2025-04-14 01:40:59,908 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 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 01:40:59,908 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:40:59,908 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:40:59,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-04-14 01:41:00,109 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:00,109 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 01:41:00,109 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:41:00,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1767449333, now seen corresponding path program 4 times [2025-04-14 01:41:00,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:41:00,110 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172960884] [2025-04-14 01:41:00,110 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:41:00,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:41:00,114 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-04-14 01:41:00,121 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 01:41:00,121 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:41:00,121 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:00,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:00,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:41:00,215 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172960884] [2025-04-14 01:41:00,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172960884] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:41:00,215 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816617457] [2025-04-14 01:41:00,215 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:41:00,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:00,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:41:00,219 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 01:41:00,221 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 01:41:00,253 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-04-14 01:41:00,291 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 01:41:00,291 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:41:00,291 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:00,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-04-14 01:41:00,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:41:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:00,326 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:41:00,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:00,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816617457] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:41:00,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:41:00,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-04-14 01:41:00,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568068784] [2025-04-14 01:41:00,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:41:00,429 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-04-14 01:41:00,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:41:00,429 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-04-14 01:41:00,429 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2025-04-14 01:41:00,429 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:41:00,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 141 transitions, 1671 flow. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:41:00,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:41:00,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:41:00,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:41:00,880 INFO L116 PetriNetUnfolderBase]: 351/687 cut-off events. [2025-04-14 01:41:00,880 INFO L117 PetriNetUnfolderBase]: For 3956/3956 co-relation queries the response was YES. [2025-04-14 01:41:00,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4125 conditions, 687 events. 351/687 cut-off events. For 3956/3956 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3439 event pairs, 47 based on Foata normal form. 12/698 useless extension candidates. Maximal degree in co-relation 3985. Up to 217 conditions per place. [2025-04-14 01:41:00,886 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 103 selfloop transitions, 89 changer transitions 0/192 dead transitions. [2025-04-14 01:41:00,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 192 transitions, 2323 flow [2025-04-14 01:41:00,886 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-04-14 01:41:00,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-04-14 01:41:00,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 142 transitions. [2025-04-14 01:41:00,887 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4152046783625731 [2025-04-14 01:41:00,887 INFO L175 Difference]: Start difference. First operand has 111 places, 141 transitions, 1671 flow. Second operand 18 states and 142 transitions. [2025-04-14 01:41:00,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 192 transitions, 2323 flow [2025-04-14 01:41:00,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 192 transitions, 2244 flow, removed 33 selfloop flow, removed 3 redundant places. [2025-04-14 01:41:00,905 INFO L231 Difference]: Finished difference. Result has 126 places, 143 transitions, 1834 flow [2025-04-14 01:41:00,905 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1560, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1834, PETRI_PLACES=126, PETRI_TRANSITIONS=143} [2025-04-14 01:41:00,905 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 106 predicate places. [2025-04-14 01:41:00,905 INFO L485 AbstractCegarLoop]: Abstraction has has 126 places, 143 transitions, 1834 flow [2025-04-14 01:41:00,905 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:41:00,906 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:41:00,906 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:41:00,912 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 01:41:01,110 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:01,110 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 01:41:01,110 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:41:01,110 INFO L85 PathProgramCache]: Analyzing trace with hash 801872569, now seen corresponding path program 5 times [2025-04-14 01:41:01,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:41:01,111 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168263231] [2025-04-14 01:41:01,111 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:41:01,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:41:01,115 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-14 01:41:01,123 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 01:41:01,123 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:41:01,123 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:01,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:01,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:41:01,211 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168263231] [2025-04-14 01:41:01,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168263231] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:41:01,212 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46046919] [2025-04-14 01:41:01,212 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:41:01,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:01,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:41:01,213 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 01:41:01,215 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 01:41:01,250 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-14 01:41:01,304 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 01:41:01,305 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:41:01,305 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:01,305 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-04-14 01:41:01,306 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:41:01,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:01,336 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:41:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:01,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46046919] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:41:01,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:41:01,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-04-14 01:41:01,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120026575] [2025-04-14 01:41:01,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:41:01,453 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-04-14 01:41:01,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:41:01,454 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-04-14 01:41:01,454 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2025-04-14 01:41:01,454 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:41:01,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 143 transitions, 1834 flow. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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 01:41:01,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:41:01,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:41:01,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:41:01,737 INFO L116 PetriNetUnfolderBase]: 530/988 cut-off events. [2025-04-14 01:41:01,737 INFO L117 PetriNetUnfolderBase]: For 7261/7261 co-relation queries the response was YES. [2025-04-14 01:41:01,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6336 conditions, 988 events. 530/988 cut-off events. For 7261/7261 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5153 event pairs, 98 based on Foata normal form. 14/1001 useless extension candidates. Maximal degree in co-relation 6225. Up to 533 conditions per place. [2025-04-14 01:41:01,744 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 137 selfloop transitions, 105 changer transitions 2/244 dead transitions. [2025-04-14 01:41:01,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 244 transitions, 3424 flow [2025-04-14 01:41:01,744 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-04-14 01:41:01,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-04-14 01:41:01,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 118 transitions. [2025-04-14 01:41:01,745 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.44360902255639095 [2025-04-14 01:41:01,745 INFO L175 Difference]: Start difference. First operand has 126 places, 143 transitions, 1834 flow. Second operand 14 states and 118 transitions. [2025-04-14 01:41:01,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 244 transitions, 3424 flow [2025-04-14 01:41:01,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 244 transitions, 3282 flow, removed 19 selfloop flow, removed 10 redundant places. [2025-04-14 01:41:01,771 INFO L231 Difference]: Finished difference. Result has 134 places, 199 transitions, 2828 flow [2025-04-14 01:41:01,771 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2828, PETRI_PLACES=134, PETRI_TRANSITIONS=199} [2025-04-14 01:41:01,772 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 114 predicate places. [2025-04-14 01:41:01,772 INFO L485 AbstractCegarLoop]: Abstraction has has 134 places, 199 transitions, 2828 flow [2025-04-14 01:41:01,772 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 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 01:41:01,772 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:41:01,772 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:41:01,778 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 01:41:01,972 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,SelfDestructingSolverStorable11 [2025-04-14 01:41:01,973 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 01:41:01,973 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:41:01,973 INFO L85 PathProgramCache]: Analyzing trace with hash 798470629, now seen corresponding path program 6 times [2025-04-14 01:41:01,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:41:01,973 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809248448] [2025-04-14 01:41:01,973 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:41:01,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:41:01,977 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 16 statements into 2 equivalence classes. [2025-04-14 01:41:01,991 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 01:41:01,991 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:41:01,991 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:02,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:41:02,070 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809248448] [2025-04-14 01:41:02,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809248448] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:41:02,070 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652712004] [2025-04-14 01:41:02,070 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:41:02,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:02,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:41:02,072 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 01:41:02,073 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 01:41:02,107 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 16 statements into 2 equivalence classes. [2025-04-14 01:41:02,168 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 01:41:02,169 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:41:02,169 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:02,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-04-14 01:41:02,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:41:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:02,204 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:41:02,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:02,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652712004] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:41:02,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:41:02,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-04-14 01:41:02,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835490606] [2025-04-14 01:41:02,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:41:02,315 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-04-14 01:41:02,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:41:02,315 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-04-14 01:41:02,316 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2025-04-14 01:41:02,316 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:41:02,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 199 transitions, 2828 flow. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:41:02,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:41:02,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:41:02,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:41:02,676 INFO L116 PetriNetUnfolderBase]: 516/973 cut-off events. [2025-04-14 01:41:02,676 INFO L117 PetriNetUnfolderBase]: For 9358/9358 co-relation queries the response was YES. [2025-04-14 01:41:02,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6748 conditions, 973 events. 516/973 cut-off events. For 9358/9358 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5175 event pairs, 99 based on Foata normal form. 21/993 useless extension candidates. Maximal degree in co-relation 6632. Up to 545 conditions per place. [2025-04-14 01:41:02,683 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 136 selfloop transitions, 104 changer transitions 2/242 dead transitions. [2025-04-14 01:41:02,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 242 transitions, 3664 flow [2025-04-14 01:41:02,684 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-04-14 01:41:02,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-04-14 01:41:02,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 116 transitions. [2025-04-14 01:41:02,684 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4070175438596491 [2025-04-14 01:41:02,684 INFO L175 Difference]: Start difference. First operand has 134 places, 199 transitions, 2828 flow. Second operand 15 states and 116 transitions. [2025-04-14 01:41:02,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 242 transitions, 3664 flow [2025-04-14 01:41:02,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 242 transitions, 3350 flow, removed 143 selfloop flow, removed 5 redundant places. [2025-04-14 01:41:02,714 INFO L231 Difference]: Finished difference. Result has 145 places, 203 transitions, 2870 flow [2025-04-14 01:41:02,714 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=2473, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2870, PETRI_PLACES=145, PETRI_TRANSITIONS=203} [2025-04-14 01:41:02,716 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 125 predicate places. [2025-04-14 01:41:02,716 INFO L485 AbstractCegarLoop]: Abstraction has has 145 places, 203 transitions, 2870 flow [2025-04-14 01:41:02,716 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:41:02,716 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:41:02,716 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:41:02,724 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 01:41:02,916 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,SelfDestructingSolverStorable12 [2025-04-14 01:41:02,916 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 01:41:02,917 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:41:02,917 INFO L85 PathProgramCache]: Analyzing trace with hash -363063313, now seen corresponding path program 7 times [2025-04-14 01:41:02,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:41:02,917 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492074880] [2025-04-14 01:41:02,917 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:41:02,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:41:02,921 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-14 01:41:02,927 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 01:41:02,927 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:41:02,927 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:02,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:41:02,989 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492074880] [2025-04-14 01:41:02,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492074880] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:41:02,989 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764518545] [2025-04-14 01:41:02,989 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:41:02,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:02,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:41:02,991 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 01:41:02,992 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 01:41:03,027 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-14 01:41:03,049 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 01:41:03,049 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:41:03,049 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:03,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-04-14 01:41:03,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:41:03,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:03,083 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:41:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:03,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764518545] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:41:03,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:41:03,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-04-14 01:41:03,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496774870] [2025-04-14 01:41:03,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:41:03,203 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-04-14 01:41:03,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:41:03,204 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-04-14 01:41:03,204 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-04-14 01:41:03,204 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:41:03,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 203 transitions, 2870 flow. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:41:03,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:41:03,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:41:03,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:41:03,678 INFO L116 PetriNetUnfolderBase]: 725/1398 cut-off events. [2025-04-14 01:41:03,678 INFO L117 PetriNetUnfolderBase]: For 14356/14356 co-relation queries the response was YES. [2025-04-14 01:41:03,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9672 conditions, 1398 events. 725/1398 cut-off events. For 14356/14356 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 8111 event pairs, 22 based on Foata normal form. 6/1403 useless extension candidates. Maximal degree in co-relation 9494. Up to 465 conditions per place. [2025-04-14 01:41:03,687 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 178 selfloop transitions, 156 changer transitions 0/334 dead transitions. [2025-04-14 01:41:03,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 334 transitions, 5116 flow [2025-04-14 01:41:03,687 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-04-14 01:41:03,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-04-14 01:41:03,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 143 transitions. [2025-04-14 01:41:03,688 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.44272445820433437 [2025-04-14 01:41:03,688 INFO L175 Difference]: Start difference. First operand has 145 places, 203 transitions, 2870 flow. Second operand 17 states and 143 transitions. [2025-04-14 01:41:03,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 334 transitions, 5116 flow [2025-04-14 01:41:03,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 334 transitions, 4936 flow, removed 26 selfloop flow, removed 8 redundant places. [2025-04-14 01:41:03,728 INFO L231 Difference]: Finished difference. Result has 160 places, 255 transitions, 3947 flow [2025-04-14 01:41:03,728 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=2704, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3947, PETRI_PLACES=160, PETRI_TRANSITIONS=255} [2025-04-14 01:41:03,728 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 140 predicate places. [2025-04-14 01:41:03,728 INFO L485 AbstractCegarLoop]: Abstraction has has 160 places, 255 transitions, 3947 flow [2025-04-14 01:41:03,729 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:41:03,729 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:41:03,729 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:41:03,734 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 01:41:03,929 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,SelfDestructingSolverStorable13 [2025-04-14 01:41:03,929 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 01:41:03,930 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:41:03,930 INFO L85 PathProgramCache]: Analyzing trace with hash -60998547, now seen corresponding path program 8 times [2025-04-14 01:41:03,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:41:03,930 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038648393] [2025-04-14 01:41:03,930 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:41:03,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:41:03,933 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-14 01:41:03,946 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 01:41:03,946 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:41:03,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:04,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:41:04,039 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038648393] [2025-04-14 01:41:04,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038648393] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:41:04,039 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415571475] [2025-04-14 01:41:04,039 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:41:04,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:04,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:41:04,041 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:41:04,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-04-14 01:41:04,079 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-14 01:41:04,123 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 01:41:04,123 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:41:04,123 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:04,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-04-14 01:41:04,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:41:04,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:04,162 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:41:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:04,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415571475] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:41:04,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:41:04,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-04-14 01:41:04,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585678334] [2025-04-14 01:41:04,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:41:04,216 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-14 01:41:04,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:41:04,217 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-14 01:41:04,217 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2025-04-14 01:41:04,217 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:41:04,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 255 transitions, 3947 flow. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 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 01:41:04,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:41:04,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:41:04,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:41:04,767 INFO L116 PetriNetUnfolderBase]: 839/1624 cut-off events. [2025-04-14 01:41:04,767 INFO L117 PetriNetUnfolderBase]: For 23129/23129 co-relation queries the response was YES. [2025-04-14 01:41:04,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12282 conditions, 1624 events. 839/1624 cut-off events. For 23129/23129 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 9678 event pairs, 60 based on Foata normal form. 15/1638 useless extension candidates. Maximal degree in co-relation 12054. Up to 583 conditions per place. [2025-04-14 01:41:04,778 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 172 selfloop transitions, 186 changer transitions 0/358 dead transitions. [2025-04-14 01:41:04,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 358 transitions, 5834 flow [2025-04-14 01:41:04,778 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-04-14 01:41:04,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-04-14 01:41:04,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 156 transitions. [2025-04-14 01:41:04,779 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4105263157894737 [2025-04-14 01:41:04,779 INFO L175 Difference]: Start difference. First operand has 160 places, 255 transitions, 3947 flow. Second operand 20 states and 156 transitions. [2025-04-14 01:41:04,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 358 transitions, 5834 flow [2025-04-14 01:41:04,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 358 transitions, 5578 flow, removed 106 selfloop flow, removed 3 redundant places. [2025-04-14 01:41:04,841 INFO L231 Difference]: Finished difference. Result has 184 places, 288 transitions, 4838 flow [2025-04-14 01:41:04,842 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=3679, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4838, PETRI_PLACES=184, PETRI_TRANSITIONS=288} [2025-04-14 01:41:04,842 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 164 predicate places. [2025-04-14 01:41:04,842 INFO L485 AbstractCegarLoop]: Abstraction has has 184 places, 288 transitions, 4838 flow [2025-04-14 01:41:04,842 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 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 01:41:04,842 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:41:04,842 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:41:04,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-04-14 01:41:05,043 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-04-14 01:41:05,043 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 01:41:05,043 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:41:05,043 INFO L85 PathProgramCache]: Analyzing trace with hash -57596607, now seen corresponding path program 9 times [2025-04-14 01:41:05,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:41:05,044 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425144996] [2025-04-14 01:41:05,044 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:41:05,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:41:05,047 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-04-14 01:41:05,052 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 01:41:05,053 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:41:05,053 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:05,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:41:05,140 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425144996] [2025-04-14 01:41:05,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425144996] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:41:05,141 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909134328] [2025-04-14 01:41:05,141 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:41:05,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:05,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:41:05,142 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:41:05,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-04-14 01:41:05,180 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-04-14 01:41:05,232 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 01:41:05,232 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:41:05,232 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:05,234 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-04-14 01:41:05,235 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:41:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:05,282 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:41:05,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:05,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909134328] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:41:05,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:41:05,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-04-14 01:41:05,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344235142] [2025-04-14 01:41:05,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:41:05,345 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-14 01:41:05,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:41:05,345 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-14 01:41:05,345 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2025-04-14 01:41:05,345 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:41:05,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 288 transitions, 4838 flow. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 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 01:41:05,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:41:05,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:41:05,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:41:05,915 INFO L116 PetriNetUnfolderBase]: 892/1711 cut-off events. [2025-04-14 01:41:05,915 INFO L117 PetriNetUnfolderBase]: For 32309/32309 co-relation queries the response was YES. [2025-04-14 01:41:05,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13918 conditions, 1711 events. 892/1711 cut-off events. For 32309/32309 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 10180 event pairs, 61 based on Foata normal form. 18/1728 useless extension candidates. Maximal degree in co-relation 13775. Up to 623 conditions per place. [2025-04-14 01:41:05,927 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 178 selfloop transitions, 193 changer transitions 0/371 dead transitions. [2025-04-14 01:41:05,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 371 transitions, 6574 flow [2025-04-14 01:41:05,928 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-04-14 01:41:05,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-04-14 01:41:05,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 159 transitions. [2025-04-14 01:41:05,929 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.41842105263157897 [2025-04-14 01:41:05,929 INFO L175 Difference]: Start difference. First operand has 184 places, 288 transitions, 4838 flow. Second operand 20 states and 159 transitions. [2025-04-14 01:41:05,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 371 transitions, 6574 flow [2025-04-14 01:41:06,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 371 transitions, 6372 flow, removed 75 selfloop flow, removed 5 redundant places. [2025-04-14 01:41:06,015 INFO L231 Difference]: Finished difference. Result has 201 places, 301 transitions, 5445 flow [2025-04-14 01:41:06,016 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4536, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5445, PETRI_PLACES=201, PETRI_TRANSITIONS=301} [2025-04-14 01:41:06,016 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 181 predicate places. [2025-04-14 01:41:06,016 INFO L485 AbstractCegarLoop]: Abstraction has has 201 places, 301 transitions, 5445 flow [2025-04-14 01:41:06,016 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 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 01:41:06,016 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:41:06,016 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:41:06,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-04-14 01:41:06,221 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-04-14 01:41:06,221 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 01:41:06,221 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:41:06,221 INFO L85 PathProgramCache]: Analyzing trace with hash -559936903, now seen corresponding path program 4 times [2025-04-14 01:41:06,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:41:06,221 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061458872] [2025-04-14 01:41:06,221 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:41:06,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:41:06,225 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-04-14 01:41:06,231 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 01:41:06,231 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:41:06,231 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:06,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:41:06,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:41:06,314 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061458872] [2025-04-14 01:41:06,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061458872] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:41:06,314 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543081627] [2025-04-14 01:41:06,314 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:41:06,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:06,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:41:06,316 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:41:06,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-04-14 01:41:06,351 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-04-14 01:41:06,364 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 01:41:06,364 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:41:06,364 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:06,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-04-14 01:41:06,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:41:06,388 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 01:41:06,508 INFO L325 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-04-14 01:41:06,508 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 50 [2025-04-14 01:41:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:41:06,523 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:41:06,717 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 130 treesize of output 116 [2025-04-14 01:41:06,739 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:41:06,740 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 286 treesize of output 240 [2025-04-14 01:41:07,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:41:07,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543081627] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:41:07,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:41:07,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2025-04-14 01:41:07,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7603497] [2025-04-14 01:41:07,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:41:07,521 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-14 01:41:07,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:41:07,521 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-14 01:41:07,521 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2025-04-14 01:41:07,521 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:41:07,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 301 transitions, 5445 flow. Second operand has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:41:07,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:41:07,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:41:07,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:41:08,451 INFO L116 PetriNetUnfolderBase]: 1213/2393 cut-off events. [2025-04-14 01:41:08,451 INFO L117 PetriNetUnfolderBase]: For 53592/53592 co-relation queries the response was YES. [2025-04-14 01:41:08,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20582 conditions, 2393 events. 1213/2393 cut-off events. For 53592/53592 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15641 event pairs, 83 based on Foata normal form. 27/2419 useless extension candidates. Maximal degree in co-relation 20462. Up to 756 conditions per place. [2025-04-14 01:41:08,467 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 283 selfloop transitions, 114 changer transitions 99/496 dead transitions. [2025-04-14 01:41:08,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 496 transitions, 9296 flow [2025-04-14 01:41:08,468 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-04-14 01:41:08,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-04-14 01:41:08,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 222 transitions. [2025-04-14 01:41:08,469 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.41729323308270677 [2025-04-14 01:41:08,469 INFO L175 Difference]: Start difference. First operand has 201 places, 301 transitions, 5445 flow. Second operand 28 states and 222 transitions. [2025-04-14 01:41:08,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 496 transitions, 9296 flow [2025-04-14 01:41:08,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 496 transitions, 9038 flow, removed 44 selfloop flow, removed 10 redundant places. [2025-04-14 01:41:08,608 INFO L231 Difference]: Finished difference. Result has 229 places, 303 transitions, 5619 flow [2025-04-14 01:41:08,608 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=5238, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5619, PETRI_PLACES=229, PETRI_TRANSITIONS=303} [2025-04-14 01:41:08,609 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 209 predicate places. [2025-04-14 01:41:08,609 INFO L485 AbstractCegarLoop]: Abstraction has has 229 places, 303 transitions, 5619 flow [2025-04-14 01:41:08,609 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:41:08,609 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:41:08,609 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:41:08,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-04-14 01:41:08,810 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-04-14 01:41:08,810 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:41:08,810 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:41:08,810 INFO L85 PathProgramCache]: Analyzing trace with hash 990515856, now seen corresponding path program 1 times [2025-04-14 01:41:08,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:41:08,810 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110626660] [2025-04-14 01:41:08,810 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:41:08,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:41:08,815 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-14 01:41:08,820 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 01:41:08,820 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:41:08,820 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:08,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:41:08,907 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110626660] [2025-04-14 01:41:08,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110626660] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:41:08,907 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316751631] [2025-04-14 01:41:08,907 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:41:08,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:08,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:41:08,910 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:41:08,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-04-14 01:41:08,949 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-14 01:41:08,968 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 01:41:08,968 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:41:08,968 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:08,970 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-04-14 01:41:08,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:41:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:09,000 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:41:09,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:09,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316751631] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:41:09,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:41:09,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2025-04-14 01:41:09,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015113563] [2025-04-14 01:41:09,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:41:09,048 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-04-14 01:41:09,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:41:09,048 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-04-14 01:41:09,048 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2025-04-14 01:41:09,048 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:41:09,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 303 transitions, 5619 flow. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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 01:41:09,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:41:09,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:41:09,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:41:09,496 INFO L116 PetriNetUnfolderBase]: 996/1963 cut-off events. [2025-04-14 01:41:09,496 INFO L117 PetriNetUnfolderBase]: For 59085/59085 co-relation queries the response was YES. [2025-04-14 01:41:09,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18194 conditions, 1963 events. 996/1963 cut-off events. For 59085/59085 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 12350 event pairs, 136 based on Foata normal form. 51/2013 useless extension candidates. Maximal degree in co-relation 18099. Up to 631 conditions per place. [2025-04-14 01:41:09,514 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 181 selfloop transitions, 143 changer transitions 10/334 dead transitions. [2025-04-14 01:41:09,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 334 transitions, 6689 flow [2025-04-14 01:41:09,514 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-14 01:41:09,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-14 01:41:09,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 77 transitions. [2025-04-14 01:41:09,515 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4502923976608187 [2025-04-14 01:41:09,515 INFO L175 Difference]: Start difference. First operand has 229 places, 303 transitions, 5619 flow. Second operand 9 states and 77 transitions. [2025-04-14 01:41:09,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 334 transitions, 6689 flow [2025-04-14 01:41:09,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 334 transitions, 6144 flow, removed 168 selfloop flow, removed 19 redundant places. [2025-04-14 01:41:09,678 INFO L231 Difference]: Finished difference. Result has 202 places, 288 transitions, 5361 flow [2025-04-14 01:41:09,678 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4910, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5361, PETRI_PLACES=202, PETRI_TRANSITIONS=288} [2025-04-14 01:41:09,678 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 182 predicate places. [2025-04-14 01:41:09,678 INFO L485 AbstractCegarLoop]: Abstraction has has 202 places, 288 transitions, 5361 flow [2025-04-14 01:41:09,678 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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 01:41:09,678 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:41:09,678 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:41:09,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-04-14 01:41:09,879 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:09,879 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:41:09,879 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:41:09,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1890134428, now seen corresponding path program 5 times [2025-04-14 01:41:09,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:41:09,879 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864756080] [2025-04-14 01:41:09,879 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:41:09,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:41:09,883 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-04-14 01:41:09,889 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 01:41:09,889 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:41:09,889 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:09,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:09,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:41:09,951 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864756080] [2025-04-14 01:41:09,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864756080] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:41:09,951 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077387749] [2025-04-14 01:41:09,951 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:41:09,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:09,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:41:09,953 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:41:09,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-04-14 01:41:09,989 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-04-14 01:41:10,015 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 01:41:10,015 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:41:10,015 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:10,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-14 01:41:10,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:41:10,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:10,065 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:41:10,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:10,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077387749] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:41:10,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:41:10,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2025-04-14 01:41:10,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812669810] [2025-04-14 01:41:10,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:41:10,153 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-14 01:41:10,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:41:10,153 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-14 01:41:10,153 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2025-04-14 01:41:10,154 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:41:10,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 288 transitions, 5361 flow. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 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 01:41:10,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:41:10,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:41:10,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:41:10,822 INFO L116 PetriNetUnfolderBase]: 1005/1996 cut-off events. [2025-04-14 01:41:10,822 INFO L117 PetriNetUnfolderBase]: For 48938/48938 co-relation queries the response was YES. [2025-04-14 01:41:10,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16989 conditions, 1996 events. 1005/1996 cut-off events. For 48938/48938 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 12623 event pairs, 44 based on Foata normal form. 38/2033 useless extension candidates. Maximal degree in co-relation 16905. Up to 725 conditions per place. [2025-04-14 01:41:10,837 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 209 selfloop transitions, 167 changer transitions 4/380 dead transitions. [2025-04-14 01:41:10,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 380 transitions, 7287 flow [2025-04-14 01:41:10,837 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-04-14 01:41:10,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-04-14 01:41:10,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 167 transitions. [2025-04-14 01:41:10,838 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.41854636591478694 [2025-04-14 01:41:10,838 INFO L175 Difference]: Start difference. First operand has 202 places, 288 transitions, 5361 flow. Second operand 21 states and 167 transitions. [2025-04-14 01:41:10,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 380 transitions, 7287 flow [2025-04-14 01:41:10,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 380 transitions, 6862 flow, removed 119 selfloop flow, removed 5 redundant places. [2025-04-14 01:41:10,981 INFO L231 Difference]: Finished difference. Result has 225 places, 316 transitions, 6145 flow [2025-04-14 01:41:10,981 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=4924, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6145, PETRI_PLACES=225, PETRI_TRANSITIONS=316} [2025-04-14 01:41:10,981 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 205 predicate places. [2025-04-14 01:41:10,981 INFO L485 AbstractCegarLoop]: Abstraction has has 225 places, 316 transitions, 6145 flow [2025-04-14 01:41:10,981 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 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 01:41:10,981 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:41:10,981 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:41:10,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-04-14 01:41:11,182 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:11,182 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:41:11,182 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:41:11,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1045085924, now seen corresponding path program 10 times [2025-04-14 01:41:11,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:41:11,182 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387067972] [2025-04-14 01:41:11,183 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:41:11,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:41:11,186 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 17 statements into 2 equivalence classes. [2025-04-14 01:41:11,191 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 01:41:11,191 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:41:11,191 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:11,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:11,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:41:11,280 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387067972] [2025-04-14 01:41:11,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387067972] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:41:11,280 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278933943] [2025-04-14 01:41:11,280 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:41:11,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:11,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:41:11,282 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:41:11,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-04-14 01:41:11,326 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 17 statements into 2 equivalence classes. [2025-04-14 01:41:11,352 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 01:41:11,353 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:41:11,353 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:11,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-14 01:41:11,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:41:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:11,397 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:41:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:11,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278933943] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:41:11,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:41:11,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-04-14 01:41:11,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584314084] [2025-04-14 01:41:11,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:41:11,490 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-14 01:41:11,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:41:11,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-14 01:41:11,491 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2025-04-14 01:41:11,491 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:41:11,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 316 transitions, 6145 flow. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 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 01:41:11,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:41:11,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:41:11,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:41:12,203 INFO L116 PetriNetUnfolderBase]: 1007/2000 cut-off events. [2025-04-14 01:41:12,203 INFO L117 PetriNetUnfolderBase]: For 45594/45594 co-relation queries the response was YES. [2025-04-14 01:41:12,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17341 conditions, 2000 events. 1007/2000 cut-off events. For 45594/45594 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 12665 event pairs, 132 based on Foata normal form. 12/2011 useless extension candidates. Maximal degree in co-relation 17248. Up to 686 conditions per place. [2025-04-14 01:41:12,218 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 204 selfloop transitions, 179 changer transitions 1/384 dead transitions. [2025-04-14 01:41:12,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 384 transitions, 7687 flow [2025-04-14 01:41:12,219 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-04-14 01:41:12,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-04-14 01:41:12,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 118 transitions. [2025-04-14 01:41:12,220 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3653250773993808 [2025-04-14 01:41:12,220 INFO L175 Difference]: Start difference. First operand has 225 places, 316 transitions, 6145 flow. Second operand 17 states and 118 transitions. [2025-04-14 01:41:12,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 384 transitions, 7687 flow [2025-04-14 01:41:12,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 384 transitions, 7384 flow, removed 142 selfloop flow, removed 7 redundant places. [2025-04-14 01:41:12,409 INFO L231 Difference]: Finished difference. Result has 238 places, 324 transitions, 6396 flow [2025-04-14 01:41:12,409 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=5876, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6396, PETRI_PLACES=238, PETRI_TRANSITIONS=324} [2025-04-14 01:41:12,409 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 218 predicate places. [2025-04-14 01:41:12,409 INFO L485 AbstractCegarLoop]: Abstraction has has 238 places, 324 transitions, 6396 flow [2025-04-14 01:41:12,409 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 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 01:41:12,410 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:41:12,410 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:41:12,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-04-14 01:41:12,612 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:12,612 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:41:12,612 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:41:12,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1480581072, now seen corresponding path program 6 times [2025-04-14 01:41:12,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:41:12,612 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903407444] [2025-04-14 01:41:12,612 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:41:12,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:41:12,617 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 17 statements into 2 equivalence classes. [2025-04-14 01:41:12,626 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 01:41:12,626 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:41:12,626 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:12,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:12,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:41:12,741 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903407444] [2025-04-14 01:41:12,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903407444] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:41:12,741 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089948465] [2025-04-14 01:41:12,741 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:41:12,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:12,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:41:12,743 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:41:12,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-04-14 01:41:12,784 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 17 statements into 2 equivalence classes. [2025-04-14 01:41:12,810 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 01:41:12,810 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:41:12,810 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:12,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-04-14 01:41:12,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:41:12,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:12,850 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:41:12,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:12,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089948465] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-14 01:41:12,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-14 01:41:12,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 13 [2025-04-14 01:41:12,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29367949] [2025-04-14 01:41:12,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:41:12,902 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-14 01:41:12,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:41:12,903 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-14 01:41:12,903 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2025-04-14 01:41:12,903 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:41:12,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 324 transitions, 6396 flow. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 01:41:12,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:41:12,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:41:12,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:41:13,233 INFO L116 PetriNetUnfolderBase]: 999/1978 cut-off events. [2025-04-14 01:41:13,233 INFO L117 PetriNetUnfolderBase]: For 32499/32499 co-relation queries the response was YES. [2025-04-14 01:41:13,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16691 conditions, 1978 events. 999/1978 cut-off events. For 32499/32499 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 12467 event pairs, 98 based on Foata normal form. 4/1981 useless extension candidates. Maximal degree in co-relation 16595. Up to 1105 conditions per place. [2025-04-14 01:41:13,249 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 272 selfloop transitions, 66 changer transitions 1/339 dead transitions. [2025-04-14 01:41:13,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 339 transitions, 7336 flow [2025-04-14 01:41:13,249 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 01:41:13,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 01:41:13,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2025-04-14 01:41:13,250 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5052631578947369 [2025-04-14 01:41:13,250 INFO L175 Difference]: Start difference. First operand has 238 places, 324 transitions, 6396 flow. Second operand 5 states and 48 transitions. [2025-04-14 01:41:13,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 339 transitions, 7336 flow [2025-04-14 01:41:13,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 339 transitions, 7089 flow, removed 33 selfloop flow, removed 6 redundant places. [2025-04-14 01:41:13,408 INFO L231 Difference]: Finished difference. Result has 235 places, 319 transitions, 6315 flow [2025-04-14 01:41:13,408 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6077, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6315, PETRI_PLACES=235, PETRI_TRANSITIONS=319} [2025-04-14 01:41:13,408 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 215 predicate places. [2025-04-14 01:41:13,408 INFO L485 AbstractCegarLoop]: Abstraction has has 235 places, 319 transitions, 6315 flow [2025-04-14 01:41:13,408 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 01:41:13,409 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:41:13,409 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:41:13,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-04-14 01:41:13,609 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:13,609 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:41:13,610 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:41:13,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1192929126, now seen corresponding path program 7 times [2025-04-14 01:41:13,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:41:13,610 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710956516] [2025-04-14 01:41:13,610 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:41:13,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:41:13,613 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-14 01:41:13,618 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 01:41:13,618 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:41:13,618 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:13,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:13,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:41:13,715 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710956516] [2025-04-14 01:41:13,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710956516] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:41:13,715 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961248902] [2025-04-14 01:41:13,715 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:41:13,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:13,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:41:13,717 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:41:13,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-04-14 01:41:13,755 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-14 01:41:13,780 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 01:41:13,780 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:41:13,780 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:13,781 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-04-14 01:41:13,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:41:13,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:13,809 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:41:13,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:13,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961248902] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:41:13,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:41:13,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 12 [2025-04-14 01:41:13,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769111603] [2025-04-14 01:41:13,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:41:13,869 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-04-14 01:41:13,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:41:13,869 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-04-14 01:41:13,869 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2025-04-14 01:41:13,870 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:41:13,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 319 transitions, 6315 flow. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 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 01:41:13,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:41:13,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:41:13,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:41:14,490 INFO L116 PetriNetUnfolderBase]: 1036/2084 cut-off events. [2025-04-14 01:41:14,490 INFO L117 PetriNetUnfolderBase]: For 34720/34720 co-relation queries the response was YES. [2025-04-14 01:41:14,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17679 conditions, 2084 events. 1036/2084 cut-off events. For 34720/34720 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 13552 event pairs, 189 based on Foata normal form. 10/2093 useless extension candidates. Maximal degree in co-relation 17582. Up to 1039 conditions per place. [2025-04-14 01:41:14,505 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 231 selfloop transitions, 146 changer transitions 1/378 dead transitions. [2025-04-14 01:41:14,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 378 transitions, 7713 flow [2025-04-14 01:41:14,506 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-14 01:41:14,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-14 01:41:14,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 110 transitions. [2025-04-14 01:41:14,506 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4824561403508772 [2025-04-14 01:41:14,506 INFO L175 Difference]: Start difference. First operand has 235 places, 319 transitions, 6315 flow. Second operand 12 states and 110 transitions. [2025-04-14 01:41:14,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 378 transitions, 7713 flow [2025-04-14 01:41:14,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 378 transitions, 7578 flow, removed 49 selfloop flow, removed 1 redundant places. [2025-04-14 01:41:14,679 INFO L231 Difference]: Finished difference. Result has 249 places, 335 transitions, 7010 flow [2025-04-14 01:41:14,679 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6236, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7010, PETRI_PLACES=249, PETRI_TRANSITIONS=335} [2025-04-14 01:41:14,679 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 229 predicate places. [2025-04-14 01:41:14,679 INFO L485 AbstractCegarLoop]: Abstraction has has 249 places, 335 transitions, 7010 flow [2025-04-14 01:41:14,679 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 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 01:41:14,679 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:41:14,680 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:41:14,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-04-14 01:41:14,880 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:14,880 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:41:14,880 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:41:14,881 INFO L85 PathProgramCache]: Analyzing trace with hash -211336844, now seen corresponding path program 8 times [2025-04-14 01:41:14,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:41:14,881 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388707159] [2025-04-14 01:41:14,881 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:41:14,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:41:14,884 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-04-14 01:41:14,893 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 01:41:14,893 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:41:14,893 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:14,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:41:14,971 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388707159] [2025-04-14 01:41:14,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388707159] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:41:14,971 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528976325] [2025-04-14 01:41:14,971 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:41:14,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:14,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:41:14,973 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:41:14,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-04-14 01:41:15,018 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-04-14 01:41:15,041 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 01:41:15,041 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:41:15,041 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:15,042 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-14 01:41:15,043 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:41:15,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:15,062 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:41:15,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:15,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528976325] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:41:15,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:41:15,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2025-04-14 01:41:15,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425350392] [2025-04-14 01:41:15,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:41:15,130 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-04-14 01:41:15,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:41:15,131 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-04-14 01:41:15,131 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2025-04-14 01:41:15,131 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:41:15,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 335 transitions, 7010 flow. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 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 01:41:15,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:41:15,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:41:15,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:41:15,586 INFO L116 PetriNetUnfolderBase]: 1029/2066 cut-off events. [2025-04-14 01:41:15,586 INFO L117 PetriNetUnfolderBase]: For 36994/36994 co-relation queries the response was YES. [2025-04-14 01:41:15,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18275 conditions, 2066 events. 1029/2066 cut-off events. For 36994/36994 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13397 event pairs, 164 based on Foata normal form. 4/2069 useless extension candidates. Maximal degree in co-relation 18174. Up to 868 conditions per place. [2025-04-14 01:41:15,603 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 250 selfloop transitions, 126 changer transitions 5/381 dead transitions. [2025-04-14 01:41:15,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 381 transitions, 8322 flow [2025-04-14 01:41:15,603 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-04-14 01:41:15,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-04-14 01:41:15,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 99 transitions. [2025-04-14 01:41:15,604 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4008097165991903 [2025-04-14 01:41:15,604 INFO L175 Difference]: Start difference. First operand has 249 places, 335 transitions, 7010 flow. Second operand 13 states and 99 transitions. [2025-04-14 01:41:15,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 381 transitions, 8322 flow [2025-04-14 01:41:15,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 381 transitions, 8241 flow, removed 18 selfloop flow, removed 4 redundant places. [2025-04-14 01:41:15,807 INFO L231 Difference]: Finished difference. Result has 259 places, 333 transitions, 7220 flow [2025-04-14 01:41:15,807 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6915, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7220, PETRI_PLACES=259, PETRI_TRANSITIONS=333} [2025-04-14 01:41:15,807 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 239 predicate places. [2025-04-14 01:41:15,807 INFO L485 AbstractCegarLoop]: Abstraction has has 259 places, 333 transitions, 7220 flow [2025-04-14 01:41:15,807 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 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 01:41:15,807 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:41:15,808 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:41:15,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-04-14 01:41:16,008 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:16,009 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:41:16,009 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:41:16,009 INFO L85 PathProgramCache]: Analyzing trace with hash -625274418, now seen corresponding path program 9 times [2025-04-14 01:41:16,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:41:16,010 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105442429] [2025-04-14 01:41:16,010 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:41:16,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:41:16,013 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 2 equivalence classes. [2025-04-14 01:41:16,019 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 01:41:16,019 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:41:16,019 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:16,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:16,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:41:16,086 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105442429] [2025-04-14 01:41:16,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105442429] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:41:16,086 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401897282] [2025-04-14 01:41:16,086 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:41:16,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:16,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:41:16,089 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:41:16,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-04-14 01:41:16,131 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 2 equivalence classes. [2025-04-14 01:41:16,154 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 01:41:16,154 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:41:16,154 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:16,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-14 01:41:16,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:41:16,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:16,173 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:41:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:16,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401897282] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:41:16,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:41:16,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2025-04-14 01:41:16,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505914319] [2025-04-14 01:41:16,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:41:16,233 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-04-14 01:41:16,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:41:16,233 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-04-14 01:41:16,233 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-04-14 01:41:16,233 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:41:16,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 333 transitions, 7220 flow. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:41:16,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:41:16,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:41:16,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:41:16,788 INFO L116 PetriNetUnfolderBase]: 1100/2214 cut-off events. [2025-04-14 01:41:16,789 INFO L117 PetriNetUnfolderBase]: For 43378/43378 co-relation queries the response was YES. [2025-04-14 01:41:16,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20004 conditions, 2214 events. 1100/2214 cut-off events. For 43378/43378 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 14634 event pairs, 173 based on Foata normal form. 2/2215 useless extension candidates. Maximal degree in co-relation 19903. Up to 847 conditions per place. [2025-04-14 01:41:16,806 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 271 selfloop transitions, 137 changer transitions 3/411 dead transitions. [2025-04-14 01:41:16,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 411 transitions, 9156 flow [2025-04-14 01:41:16,807 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-04-14 01:41:16,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-04-14 01:41:16,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 116 transitions. [2025-04-14 01:41:16,808 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3815789473684211 [2025-04-14 01:41:16,808 INFO L175 Difference]: Start difference. First operand has 259 places, 333 transitions, 7220 flow. Second operand 16 states and 116 transitions. [2025-04-14 01:41:16,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 411 transitions, 9156 flow [2025-04-14 01:41:17,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 411 transitions, 8637 flow, removed 20 selfloop flow, removed 15 redundant places. [2025-04-14 01:41:17,015 INFO L231 Difference]: Finished difference. Result has 259 places, 339 transitions, 7207 flow [2025-04-14 01:41:17,015 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6679, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7207, PETRI_PLACES=259, PETRI_TRANSITIONS=339} [2025-04-14 01:41:17,016 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 239 predicate places. [2025-04-14 01:41:17,016 INFO L485 AbstractCegarLoop]: Abstraction has has 259 places, 339 transitions, 7207 flow [2025-04-14 01:41:17,016 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:41:17,016 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:41:17,016 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:41:17,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-04-14 01:41:17,220 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-04-14 01:41:17,220 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:41:17,221 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:41:17,221 INFO L85 PathProgramCache]: Analyzing trace with hash 2066197540, now seen corresponding path program 10 times [2025-04-14 01:41:17,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:41:17,221 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399240059] [2025-04-14 01:41:17,221 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:41:17,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:41:17,225 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 17 statements into 2 equivalence classes. [2025-04-14 01:41:17,230 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 01:41:17,230 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:41:17,231 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:17,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:17,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:41:17,328 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399240059] [2025-04-14 01:41:17,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399240059] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:41:17,328 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383923550] [2025-04-14 01:41:17,328 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:41:17,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:17,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:41:17,331 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:41:17,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-04-14 01:41:17,375 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 17 statements into 2 equivalence classes. [2025-04-14 01:41:17,407 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 01:41:17,407 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:41:17,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:17,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-14 01:41:17,410 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:41:17,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:17,445 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:41:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:17,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383923550] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:41:17,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:41:17,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 14 [2025-04-14 01:41:17,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150549472] [2025-04-14 01:41:17,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:41:17,570 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-14 01:41:17,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:41:17,571 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-14 01:41:17,571 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2025-04-14 01:41:17,571 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:41:17,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 339 transitions, 7207 flow. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 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 01:41:17,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:41:17,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:41:17,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:41:18,251 INFO L116 PetriNetUnfolderBase]: 1146/2314 cut-off events. [2025-04-14 01:41:18,251 INFO L117 PetriNetUnfolderBase]: For 48176/48176 co-relation queries the response was YES. [2025-04-14 01:41:18,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20563 conditions, 2314 events. 1146/2314 cut-off events. For 48176/48176 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 15566 event pairs, 246 based on Foata normal form. 15/2328 useless extension candidates. Maximal degree in co-relation 20461. Up to 1371 conditions per place. [2025-04-14 01:41:18,270 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 256 selfloop transitions, 148 changer transitions 3/407 dead transitions. [2025-04-14 01:41:18,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 407 transitions, 8878 flow [2025-04-14 01:41:18,270 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-04-14 01:41:18,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-04-14 01:41:18,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 143 transitions. [2025-04-14 01:41:18,271 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.41812865497076024 [2025-04-14 01:41:18,271 INFO L175 Difference]: Start difference. First operand has 259 places, 339 transitions, 7207 flow. Second operand 18 states and 143 transitions. [2025-04-14 01:41:18,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 407 transitions, 8878 flow [2025-04-14 01:41:18,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 407 transitions, 8461 flow, removed 39 selfloop flow, removed 12 redundant places. [2025-04-14 01:41:18,474 INFO L231 Difference]: Finished difference. Result has 268 places, 357 transitions, 7694 flow [2025-04-14 01:41:18,475 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=6782, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7694, PETRI_PLACES=268, PETRI_TRANSITIONS=357} [2025-04-14 01:41:18,475 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 248 predicate places. [2025-04-14 01:41:18,475 INFO L485 AbstractCegarLoop]: Abstraction has has 268 places, 357 transitions, 7694 flow [2025-04-14 01:41:18,475 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 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 01:41:18,475 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:41:18,476 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:41:18,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-04-14 01:41:18,676 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-04-14 01:41:18,676 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:41:18,677 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:41:18,677 INFO L85 PathProgramCache]: Analyzing trace with hash 326518734, now seen corresponding path program 11 times [2025-04-14 01:41:18,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:41:18,677 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136579086] [2025-04-14 01:41:18,677 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:41:18,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:41:18,680 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-04-14 01:41:18,685 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 01:41:18,685 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:41:18,685 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:18,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:18,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:41:18,740 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136579086] [2025-04-14 01:41:18,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136579086] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:41:18,741 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774186829] [2025-04-14 01:41:18,741 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:41:18,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:18,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:41:18,743 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:41:18,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-04-14 01:41:18,785 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-04-14 01:41:18,859 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 01:41:18,859 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:41:18,859 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:18,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-14 01:41:18,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:41:18,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:18,890 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:41:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:23,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774186829] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:41:23,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:41:23,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 13 [2025-04-14 01:41:23,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422161230] [2025-04-14 01:41:23,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:41:23,013 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-14 01:41:23,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:41:23,013 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-14 01:41:23,014 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=117, Unknown=1, NotChecked=0, Total=156 [2025-04-14 01:41:23,014 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:41:23,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 357 transitions, 7694 flow. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:41:23,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:41:23,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:41:23,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:41:47,105 WARN L286 SmtUtils]: Spent 24.02s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 386] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-04-14 01:41:51,158 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-04-14 01:41:55,221 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-14 01:41:55,652 INFO L116 PetriNetUnfolderBase]: 1166/2343 cut-off events. [2025-04-14 01:41:55,652 INFO L117 PetriNetUnfolderBase]: For 46940/46940 co-relation queries the response was YES. [2025-04-14 01:41:55,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21302 conditions, 2343 events. 1166/2343 cut-off events. For 46940/46940 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 15729 event pairs, 236 based on Foata normal form. 4/2346 useless extension candidates. Maximal degree in co-relation 21199. Up to 1227 conditions per place. [2025-04-14 01:41:55,667 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 289 selfloop transitions, 119 changer transitions 4/412 dead transitions. [2025-04-14 01:41:55,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 412 transitions, 9388 flow [2025-04-14 01:41:55,667 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-04-14 01:41:55,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-04-14 01:41:55,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 95 transitions. [2025-04-14 01:41:55,668 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2025-04-14 01:41:55,668 INFO L175 Difference]: Start difference. First operand has 268 places, 357 transitions, 7694 flow. Second operand 14 states and 95 transitions. [2025-04-14 01:41:55,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 412 transitions, 9388 flow [2025-04-14 01:41:55,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 412 transitions, 9114 flow, removed 49 selfloop flow, removed 11 redundant places. [2025-04-14 01:41:55,833 INFO L231 Difference]: Finished difference. Result has 275 places, 367 transitions, 8105 flow [2025-04-14 01:41:55,833 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=7440, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8105, PETRI_PLACES=275, PETRI_TRANSITIONS=367} [2025-04-14 01:41:55,833 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 255 predicate places. [2025-04-14 01:41:55,833 INFO L485 AbstractCegarLoop]: Abstraction has has 275 places, 367 transitions, 8105 flow [2025-04-14 01:41:55,834 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:41:55,834 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:41:55,834 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:41:55,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-04-14 01:41:56,034 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-04-14 01:41:56,034 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:41:56,035 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:41:56,035 INFO L85 PathProgramCache]: Analyzing trace with hash -243746780, now seen corresponding path program 12 times [2025-04-14 01:41:56,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:41:56,035 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286347936] [2025-04-14 01:41:56,035 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:41:56,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:41:56,040 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 17 statements into 2 equivalence classes. [2025-04-14 01:41:56,047 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 01:41:56,047 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:41:56,047 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:56,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:56,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:41:56,119 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286347936] [2025-04-14 01:41:56,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286347936] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:41:56,119 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486000093] [2025-04-14 01:41:56,119 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:41:56,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:56,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:41:56,121 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:41:56,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-04-14 01:41:56,161 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 17 statements into 2 equivalence classes. [2025-04-14 01:41:56,189 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 01:41:56,189 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:41:56,189 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:56,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-14 01:41:56,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:41:56,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:56,209 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:41:56,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:56,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486000093] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:41:56,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:41:56,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2025-04-14 01:41:56,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130616824] [2025-04-14 01:41:56,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:41:56,256 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-04-14 01:41:56,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:41:56,256 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-04-14 01:41:56,256 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2025-04-14 01:41:56,256 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:41:56,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 367 transitions, 8105 flow. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:41:56,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:41:56,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:41:56,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:41:56,842 INFO L116 PetriNetUnfolderBase]: 1158/2317 cut-off events. [2025-04-14 01:41:56,842 INFO L117 PetriNetUnfolderBase]: For 51238/51238 co-relation queries the response was YES. [2025-04-14 01:41:56,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21384 conditions, 2317 events. 1158/2317 cut-off events. For 51238/51238 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15436 event pairs, 255 based on Foata normal form. 2/2318 useless extension candidates. Maximal degree in co-relation 21294. Up to 1206 conditions per place. [2025-04-14 01:41:56,858 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 299 selfloop transitions, 93 changer transitions 5/397 dead transitions. [2025-04-14 01:41:56,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 397 transitions, 9216 flow [2025-04-14 01:41:56,858 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-04-14 01:41:56,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-04-14 01:41:56,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 69 transitions. [2025-04-14 01:41:56,859 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3631578947368421 [2025-04-14 01:41:56,859 INFO L175 Difference]: Start difference. First operand has 275 places, 367 transitions, 8105 flow. Second operand 10 states and 69 transitions. [2025-04-14 01:41:56,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 397 transitions, 9216 flow [2025-04-14 01:41:57,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 397 transitions, 9011 flow, removed 51 selfloop flow, removed 4 redundant places. [2025-04-14 01:41:57,039 INFO L231 Difference]: Finished difference. Result has 277 places, 363 transitions, 7990 flow [2025-04-14 01:41:57,039 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=7887, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7990, PETRI_PLACES=277, PETRI_TRANSITIONS=363} [2025-04-14 01:41:57,039 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 257 predicate places. [2025-04-14 01:41:57,039 INFO L485 AbstractCegarLoop]: Abstraction has has 277 places, 363 transitions, 7990 flow [2025-04-14 01:41:57,039 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:41:57,039 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:41:57,040 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:41:57,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-04-14 01:41:57,240 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:57,240 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:41:57,241 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:41:57,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1608833076, now seen corresponding path program 13 times [2025-04-14 01:41:57,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:41:57,241 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912302943] [2025-04-14 01:41:57,241 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:41:57,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:41:57,244 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-14 01:41:57,248 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 01:41:57,248 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:41:57,248 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:57,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:57,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:41:57,353 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912302943] [2025-04-14 01:41:57,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912302943] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:41:57,353 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716387104] [2025-04-14 01:41:57,353 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:41:57,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:41:57,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:41:57,355 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:41:57,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-04-14 01:41:57,397 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-14 01:41:57,423 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 01:41:57,423 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:41:57,423 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:41:57,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-14 01:41:57,426 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:41:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:57,458 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:41:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:41:57,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716387104] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:41:57,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:41:57,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 14 [2025-04-14 01:41:57,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407889007] [2025-04-14 01:41:57,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:41:57,583 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-14 01:41:57,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:41:57,583 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-14 01:41:57,583 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2025-04-14 01:41:57,583 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:41:57,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 363 transitions, 7990 flow. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:41:57,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:41:57,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:41:57,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:41:58,948 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-14 01:41:59,273 INFO L116 PetriNetUnfolderBase]: 1153/2299 cut-off events. [2025-04-14 01:41:59,274 INFO L117 PetriNetUnfolderBase]: For 51697/51697 co-relation queries the response was YES. [2025-04-14 01:41:59,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21318 conditions, 2299 events. 1153/2299 cut-off events. For 51697/51697 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15274 event pairs, 221 based on Foata normal form. 2/2300 useless extension candidates. Maximal degree in co-relation 21227. Up to 1212 conditions per place. [2025-04-14 01:41:59,292 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 275 selfloop transitions, 127 changer transitions 2/404 dead transitions. [2025-04-14 01:41:59,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 404 transitions, 9264 flow [2025-04-14 01:41:59,292 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-04-14 01:41:59,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-04-14 01:41:59,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 99 transitions. [2025-04-14 01:41:59,293 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3473684210526316 [2025-04-14 01:41:59,293 INFO L175 Difference]: Start difference. First operand has 277 places, 363 transitions, 7990 flow. Second operand 15 states and 99 transitions. [2025-04-14 01:41:59,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 404 transitions, 9264 flow [2025-04-14 01:41:59,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 404 transitions, 8813 flow, removed 29 selfloop flow, removed 11 redundant places. [2025-04-14 01:41:59,474 INFO L231 Difference]: Finished difference. Result has 275 places, 360 transitions, 7721 flow [2025-04-14 01:41:59,474 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=7485, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7721, PETRI_PLACES=275, PETRI_TRANSITIONS=360} [2025-04-14 01:41:59,474 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 255 predicate places. [2025-04-14 01:41:59,474 INFO L485 AbstractCegarLoop]: Abstraction has has 275 places, 360 transitions, 7721 flow [2025-04-14 01:41:59,474 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:41:59,474 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:41:59,474 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:41:59,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-04-14 01:41:59,679 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-04-14 01:41:59,679 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:41:59,679 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:41:59,679 INFO L85 PathProgramCache]: Analyzing trace with hash 2130260377, now seen corresponding path program 2 times [2025-04-14 01:41:59,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:41:59,679 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704413581] [2025-04-14 01:41:59,679 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:41:59,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:41:59,683 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:41:59,703 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:41:59,703 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:41:59,703 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:42:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:42:00,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:42:00,202 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704413581] [2025-04-14 01:42:00,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704413581] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:42:00,202 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637407624] [2025-04-14 01:42:00,202 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:42:00,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:42:00,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:42:00,204 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:42:00,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-04-14 01:42:00,242 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:42:00,256 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:42:00,256 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:42:00,256 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:42:00,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-04-14 01:42:00,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:42:00,435 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:42:00,435 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 71 [2025-04-14 01:42:00,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:42:00,516 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:42:00,697 INFO L325 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-04-14 01:42:00,697 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2025-04-14 01:42:00,762 INFO L325 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2025-04-14 01:42:00,762 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2025-04-14 01:42:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:42:00,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637407624] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:42:00,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:42:00,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 25 [2025-04-14 01:42:00,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008018882] [2025-04-14 01:42:00,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:42:00,799 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-04-14 01:42:00,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:42:00,799 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-04-14 01:42:00,799 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2025-04-14 01:42:00,799 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:42:00,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 360 transitions, 7721 flow. Second operand has 27 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:42:00,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:42:00,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:42:00,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:42:01,900 INFO L116 PetriNetUnfolderBase]: 1274/2535 cut-off events. [2025-04-14 01:42:01,900 INFO L117 PetriNetUnfolderBase]: For 51860/51860 co-relation queries the response was YES. [2025-04-14 01:42:01,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23025 conditions, 2535 events. 1274/2535 cut-off events. For 51860/51860 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 17044 event pairs, 75 based on Foata normal form. 1/2534 useless extension candidates. Maximal degree in co-relation 22940. Up to 2147 conditions per place. [2025-04-14 01:42:01,916 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 372 selfloop transitions, 110 changer transitions 8/490 dead transitions. [2025-04-14 01:42:01,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 490 transitions, 10626 flow [2025-04-14 01:42:01,916 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-04-14 01:42:01,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-04-14 01:42:01,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 173 transitions. [2025-04-14 01:42:01,917 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.39588100686498856 [2025-04-14 01:42:01,917 INFO L175 Difference]: Start difference. First operand has 275 places, 360 transitions, 7721 flow. Second operand 23 states and 173 transitions. [2025-04-14 01:42:01,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 490 transitions, 10626 flow [2025-04-14 01:42:02,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 490 transitions, 10297 flow, removed 2 selfloop flow, removed 9 redundant places. [2025-04-14 01:42:02,097 INFO L231 Difference]: Finished difference. Result has 291 places, 419 transitions, 8943 flow [2025-04-14 01:42:02,097 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=7489, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=8943, PETRI_PLACES=291, PETRI_TRANSITIONS=419} [2025-04-14 01:42:02,098 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 271 predicate places. [2025-04-14 01:42:02,098 INFO L485 AbstractCegarLoop]: Abstraction has has 291 places, 419 transitions, 8943 flow [2025-04-14 01:42:02,098 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:42:02,098 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:42:02,098 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:42:02,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-04-14 01:42:02,302 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-04-14 01:42:02,302 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:42:02,302 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:42:02,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1216636575, now seen corresponding path program 14 times [2025-04-14 01:42:02,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:42:02,302 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668179044] [2025-04-14 01:42:02,303 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:42:02,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:42:02,306 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:42:02,317 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:42:02,318 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:42:02,318 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:42:02,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:42:02,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:42:02,406 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668179044] [2025-04-14 01:42:02,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668179044] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:42:02,407 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293351198] [2025-04-14 01:42:02,407 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:42:02,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:42:02,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:42:02,409 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:42:02,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-04-14 01:42:02,452 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:42:02,467 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:42:02,467 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:42:02,467 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:42:02,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-04-14 01:42:02,469 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:42:02,501 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 01:42:02,782 INFO L325 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2025-04-14 01:42:02,782 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 40 [2025-04-14 01:42:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:42:02,803 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:42:03,229 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 170 treesize of output 150 [2025-04-14 01:42:03,300 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:42:03,300 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 572 treesize of output 488 [2025-04-14 01:42:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:42:37,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293351198] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:42:37,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:42:37,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 27 [2025-04-14 01:42:37,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464095291] [2025-04-14 01:42:37,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:42:37,613 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-04-14 01:42:37,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:42:37,613 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-04-14 01:42:37,613 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2025-04-14 01:42:37,613 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:42:37,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 419 transitions, 8943 flow. Second operand has 27 states, 27 states have (on average 3.962962962962963) internal successors, (107), 27 states have internal predecessors, (107), 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 01:42:37,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:42:37,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:42:37,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:42:40,329 INFO L116 PetriNetUnfolderBase]: 1880/3479 cut-off events. [2025-04-14 01:42:40,329 INFO L117 PetriNetUnfolderBase]: For 72141/72141 co-relation queries the response was YES. [2025-04-14 01:42:40,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32833 conditions, 3479 events. 1880/3479 cut-off events. For 72141/72141 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 23248 event pairs, 58 based on Foata normal form. 27/3505 useless extension candidates. Maximal degree in co-relation 32743. Up to 1157 conditions per place. [2025-04-14 01:42:40,357 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 402 selfloop transitions, 396 changer transitions 8/806 dead transitions. [2025-04-14 01:42:40,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 806 transitions, 17187 flow [2025-04-14 01:42:40,357 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-04-14 01:42:40,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2025-04-14 01:42:40,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 347 transitions. [2025-04-14 01:42:40,358 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4058479532163743 [2025-04-14 01:42:40,358 INFO L175 Difference]: Start difference. First operand has 291 places, 419 transitions, 8943 flow. Second operand 45 states and 347 transitions. [2025-04-14 01:42:40,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 806 transitions, 17187 flow [2025-04-14 01:42:40,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 806 transitions, 16634 flow, removed 160 selfloop flow, removed 6 redundant places. [2025-04-14 01:42:40,644 INFO L231 Difference]: Finished difference. Result has 337 places, 601 transitions, 13492 flow [2025-04-14 01:42:40,644 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=8553, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=13492, PETRI_PLACES=337, PETRI_TRANSITIONS=601} [2025-04-14 01:42:40,645 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 317 predicate places. [2025-04-14 01:42:40,645 INFO L485 AbstractCegarLoop]: Abstraction has has 337 places, 601 transitions, 13492 flow [2025-04-14 01:42:40,645 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.962962962962963) internal successors, (107), 27 states have internal predecessors, (107), 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 01:42:40,645 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:42:40,645 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:42:40,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2025-04-14 01:42:40,845 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:42:40,845 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:42:40,846 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:42:40,846 INFO L85 PathProgramCache]: Analyzing trace with hash 386420987, now seen corresponding path program 3 times [2025-04-14 01:42:40,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:42:40,846 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082561273] [2025-04-14 01:42:40,846 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:42:40,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:42:40,850 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:42:40,860 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:42:40,860 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:42:40,860 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:42:41,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:42:41,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:42:41,285 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082561273] [2025-04-14 01:42:41,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082561273] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:42:41,285 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530135627] [2025-04-14 01:42:41,285 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:42:41,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:42:41,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:42:41,287 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:42:41,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-04-14 01:42:41,329 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:42:41,341 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:42:41,341 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:42:41,341 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:42:41,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-04-14 01:42:41,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:42:41,518 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:42:41,518 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2025-04-14 01:42:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:42:41,521 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:42:41,764 INFO L325 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-04-14 01:42:41,765 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2025-04-14 01:42:41,812 INFO L325 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2025-04-14 01:42:41,812 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2025-04-14 01:42:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:42:41,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530135627] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:42:41,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:42:41,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 26 [2025-04-14 01:42:41,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323741836] [2025-04-14 01:42:41,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:42:41,844 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-14 01:42:41,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:42:41,845 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-14 01:42:41,845 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2025-04-14 01:42:41,845 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:42:41,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 601 transitions, 13492 flow. Second operand has 28 states, 28 states have (on average 3.75) internal successors, (105), 28 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:42:41,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:42:41,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:42:41,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:42:43,127 INFO L116 PetriNetUnfolderBase]: 2023/3750 cut-off events. [2025-04-14 01:42:43,127 INFO L117 PetriNetUnfolderBase]: For 80438/80438 co-relation queries the response was YES. [2025-04-14 01:42:43,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36942 conditions, 3750 events. 2023/3750 cut-off events. For 80438/80438 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 25441 event pairs, 84 based on Foata normal form. 8/3758 useless extension candidates. Maximal degree in co-relation 36840. Up to 3089 conditions per place. [2025-04-14 01:42:43,156 INFO L140 encePairwiseOnDemand]: 8/19 looper letters, 526 selfloop transitions, 191 changer transitions 16/733 dead transitions. [2025-04-14 01:42:43,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 733 transitions, 16897 flow [2025-04-14 01:42:43,157 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-04-14 01:42:43,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-04-14 01:42:43,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 174 transitions. [2025-04-14 01:42:43,157 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.39816933638443935 [2025-04-14 01:42:43,158 INFO L175 Difference]: Start difference. First operand has 337 places, 601 transitions, 13492 flow. Second operand 23 states and 174 transitions. [2025-04-14 01:42:43,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 733 transitions, 16897 flow [2025-04-14 01:42:43,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 733 transitions, 16042 flow, removed 289 selfloop flow, removed 20 redundant places. [2025-04-14 01:42:43,456 INFO L231 Difference]: Finished difference. Result has 346 places, 659 transitions, 14510 flow [2025-04-14 01:42:43,456 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=12704, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=14510, PETRI_PLACES=346, PETRI_TRANSITIONS=659} [2025-04-14 01:42:43,456 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 326 predicate places. [2025-04-14 01:42:43,456 INFO L485 AbstractCegarLoop]: Abstraction has has 346 places, 659 transitions, 14510 flow [2025-04-14 01:42:43,457 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.75) internal successors, (105), 28 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:42:43,457 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:42:43,457 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:42:43,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-04-14 01:42:43,657 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:42:43,657 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:42:43,657 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:42:43,658 INFO L85 PathProgramCache]: Analyzing trace with hash -2114109449, now seen corresponding path program 4 times [2025-04-14 01:42:43,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:42:43,658 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595542997] [2025-04-14 01:42:43,658 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:42:43,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:42:43,661 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:42:43,670 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:42:43,671 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:42:43,671 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:42:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:42:44,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:42:44,090 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595542997] [2025-04-14 01:42:44,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595542997] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:42:44,090 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476985561] [2025-04-14 01:42:44,090 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:42:44,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:42:44,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:42:44,092 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:42:44,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-04-14 01:42:44,138 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:42:44,151 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:42:44,152 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:42:44,152 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:42:44,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-04-14 01:42:44,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:42:44,329 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:42:44,330 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2025-04-14 01:42:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:42:44,334 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:42:44,550 INFO L325 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-04-14 01:42:44,550 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2025-04-14 01:42:44,589 INFO L325 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2025-04-14 01:42:44,589 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2025-04-14 01:42:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:42:44,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476985561] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:42:44,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:42:44,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 25 [2025-04-14 01:42:44,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409127490] [2025-04-14 01:42:44,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:42:44,625 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-04-14 01:42:44,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:42:44,625 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-04-14 01:42:44,626 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2025-04-14 01:42:44,626 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:42:44,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 659 transitions, 14510 flow. Second operand has 27 states, 27 states have (on average 3.740740740740741) internal successors, (101), 27 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:42:44,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:42:44,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:42:44,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:42:49,042 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-14 01:42:50,007 INFO L116 PetriNetUnfolderBase]: 2014/3752 cut-off events. [2025-04-14 01:42:50,007 INFO L117 PetriNetUnfolderBase]: For 80305/80305 co-relation queries the response was YES. [2025-04-14 01:42:50,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36807 conditions, 3752 events. 2014/3752 cut-off events. For 80305/80305 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 25626 event pairs, 107 based on Foata normal form. 10/3762 useless extension candidates. Maximal degree in co-relation 36702. Up to 3281 conditions per place. [2025-04-14 01:42:50,040 INFO L140 encePairwiseOnDemand]: 8/19 looper letters, 585 selfloop transitions, 146 changer transitions 20/751 dead transitions. [2025-04-14 01:42:50,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 751 transitions, 16938 flow [2025-04-14 01:42:50,040 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-04-14 01:42:50,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-04-14 01:42:50,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 213 transitions. [2025-04-14 01:42:50,041 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4152046783625731 [2025-04-14 01:42:50,041 INFO L175 Difference]: Start difference. First operand has 346 places, 659 transitions, 14510 flow. Second operand 27 states and 213 transitions. [2025-04-14 01:42:50,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 751 transitions, 16938 flow [2025-04-14 01:42:50,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 751 transitions, 16765 flow, removed 42 selfloop flow, removed 11 redundant places. [2025-04-14 01:42:50,439 INFO L231 Difference]: Finished difference. Result has 367 places, 667 transitions, 14907 flow [2025-04-14 01:42:50,440 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=14317, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=14907, PETRI_PLACES=367, PETRI_TRANSITIONS=667} [2025-04-14 01:42:50,440 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 347 predicate places. [2025-04-14 01:42:50,440 INFO L485 AbstractCegarLoop]: Abstraction has has 367 places, 667 transitions, 14907 flow [2025-04-14 01:42:50,440 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.740740740740741) internal successors, (101), 27 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:42:50,440 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:42:50,441 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:42:50,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-04-14 01:42:50,645 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:42:50,645 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:42:50,645 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:42:50,645 INFO L85 PathProgramCache]: Analyzing trace with hash 462521185, now seen corresponding path program 5 times [2025-04-14 01:42:50,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:42:50,646 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989791624] [2025-04-14 01:42:50,646 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:42:50,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:42:50,649 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:42:50,657 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:42:50,657 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:42:50,657 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:42:51,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:42:51,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:42:51,220 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989791624] [2025-04-14 01:42:51,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989791624] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:42:51,220 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403822724] [2025-04-14 01:42:51,220 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:42:51,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:42:51,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:42:51,222 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:42:51,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-04-14 01:42:51,267 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:42:51,281 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:42:51,282 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:42:51,282 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:42:51,283 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-04-14 01:42:51,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:42:51,436 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:42:51,436 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 75 [2025-04-14 01:42:51,568 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:42:51,569 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:42:51,800 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:42:51,800 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 127 treesize of output 152 [2025-04-14 01:42:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:42:51,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403822724] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:42:51,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:42:51,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2025-04-14 01:42:51,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115052390] [2025-04-14 01:42:51,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:42:51,997 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-04-14 01:42:51,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:42:51,998 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-04-14 01:42:51,998 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2025-04-14 01:42:51,998 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:42:51,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 667 transitions, 14907 flow. Second operand has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 26 states have internal predecessors, (98), 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 01:42:51,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:42:51,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:42:51,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:42:53,308 INFO L116 PetriNetUnfolderBase]: 2076/3852 cut-off events. [2025-04-14 01:42:53,308 INFO L117 PetriNetUnfolderBase]: For 84644/84644 co-relation queries the response was YES. [2025-04-14 01:42:53,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38285 conditions, 3852 events. 2076/3852 cut-off events. For 84644/84644 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 26242 event pairs, 127 based on Foata normal form. 3/3855 useless extension candidates. Maximal degree in co-relation 38175. Up to 3579 conditions per place. [2025-04-14 01:42:53,341 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 654 selfloop transitions, 96 changer transitions 11/761 dead transitions. [2025-04-14 01:42:53,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 761 transitions, 17551 flow [2025-04-14 01:42:53,342 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-04-14 01:42:53,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-04-14 01:42:53,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 175 transitions. [2025-04-14 01:42:53,343 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.38377192982456143 [2025-04-14 01:42:53,343 INFO L175 Difference]: Start difference. First operand has 367 places, 667 transitions, 14907 flow. Second operand 24 states and 175 transitions. [2025-04-14 01:42:53,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 761 transitions, 17551 flow [2025-04-14 01:42:53,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 761 transitions, 17172 flow, removed 67 selfloop flow, removed 22 redundant places. [2025-04-14 01:42:53,794 INFO L231 Difference]: Finished difference. Result has 375 places, 702 transitions, 15494 flow [2025-04-14 01:42:53,795 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=14546, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=15494, PETRI_PLACES=375, PETRI_TRANSITIONS=702} [2025-04-14 01:42:53,795 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 355 predicate places. [2025-04-14 01:42:53,795 INFO L485 AbstractCegarLoop]: Abstraction has has 375 places, 702 transitions, 15494 flow [2025-04-14 01:42:53,795 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 26 states have internal predecessors, (98), 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 01:42:53,795 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:42:53,795 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:42:53,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2025-04-14 01:42:53,996 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:42:53,996 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:42:53,996 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:42:53,996 INFO L85 PathProgramCache]: Analyzing trace with hash 459119245, now seen corresponding path program 6 times [2025-04-14 01:42:53,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:42:53,996 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44229706] [2025-04-14 01:42:53,996 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:42:53,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:42:54,001 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:42:54,013 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:42:54,013 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:42:54,013 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:42:54,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:42:54,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:42:54,494 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44229706] [2025-04-14 01:42:54,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44229706] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:42:54,494 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091778818] [2025-04-14 01:42:54,494 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:42:54,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:42:54,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:42:54,497 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:42:54,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-04-14 01:42:54,537 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:42:54,549 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:42:54,549 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:42:54,549 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:42:54,549 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-04-14 01:42:54,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:42:54,715 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:42:54,715 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2025-04-14 01:42:54,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:42:54,717 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:42:54,928 INFO L325 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-04-14 01:42:54,928 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2025-04-14 01:42:54,969 INFO L325 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2025-04-14 01:42:54,969 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2025-04-14 01:42:54,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:42:54,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091778818] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:42:54,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:42:54,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 7] total 25 [2025-04-14 01:42:54,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953593250] [2025-04-14 01:42:54,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:42:54,998 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-04-14 01:42:54,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:42:54,998 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-04-14 01:42:54,998 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2025-04-14 01:42:54,998 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:42:54,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 702 transitions, 15494 flow. Second operand has 27 states, 27 states have (on average 3.814814814814815) internal successors, (103), 27 states have internal predecessors, (103), 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 01:42:54,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:42:54,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:42:54,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:42:56,533 INFO L116 PetriNetUnfolderBase]: 2085/3866 cut-off events. [2025-04-14 01:42:56,533 INFO L117 PetriNetUnfolderBase]: For 88210/88210 co-relation queries the response was YES. [2025-04-14 01:42:56,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38734 conditions, 3866 events. 2085/3866 cut-off events. For 88210/88210 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 26465 event pairs, 129 based on Foata normal form. 5/3871 useless extension candidates. Maximal degree in co-relation 38618. Up to 3616 conditions per place. [2025-04-14 01:42:56,563 INFO L140 encePairwiseOnDemand]: 8/19 looper letters, 657 selfloop transitions, 97 changer transitions 14/768 dead transitions. [2025-04-14 01:42:56,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 768 transitions, 17567 flow [2025-04-14 01:42:56,563 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-04-14 01:42:56,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-04-14 01:42:56,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 202 transitions. [2025-04-14 01:42:56,564 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.37969924812030076 [2025-04-14 01:42:56,564 INFO L175 Difference]: Start difference. First operand has 375 places, 702 transitions, 15494 flow. Second operand 28 states and 202 transitions. [2025-04-14 01:42:56,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 768 transitions, 17567 flow [2025-04-14 01:42:56,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 768 transitions, 17422 flow, removed 39 selfloop flow, removed 11 redundant places. [2025-04-14 01:42:56,962 INFO L231 Difference]: Finished difference. Result has 395 places, 706 transitions, 15699 flow [2025-04-14 01:42:56,962 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=15349, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=15699, PETRI_PLACES=395, PETRI_TRANSITIONS=706} [2025-04-14 01:42:56,962 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 375 predicate places. [2025-04-14 01:42:56,962 INFO L485 AbstractCegarLoop]: Abstraction has has 395 places, 706 transitions, 15699 flow [2025-04-14 01:42:56,962 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.814814814814815) internal successors, (103), 27 states have internal predecessors, (103), 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 01:42:56,963 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:42:56,963 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:42:56,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2025-04-14 01:42:57,164 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2025-04-14 01:42:57,164 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:42:57,164 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:42:57,164 INFO L85 PathProgramCache]: Analyzing trace with hash 545638075, now seen corresponding path program 7 times [2025-04-14 01:42:57,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:42:57,165 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307022392] [2025-04-14 01:42:57,165 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:42:57,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:42:57,168 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-14 01:42:57,174 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:42:57,174 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:42:57,174 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:42:57,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:42:57,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:42:57,627 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307022392] [2025-04-14 01:42:57,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307022392] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:42:57,628 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066885933] [2025-04-14 01:42:57,628 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:42:57,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:42:57,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:42:57,629 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:42:57,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-04-14 01:42:57,670 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-14 01:42:57,682 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:42:57,682 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:42:57,682 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:42:57,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-04-14 01:42:57,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:42:57,827 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:42:57,827 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 64 [2025-04-14 01:42:57,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:42:57,883 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:42:58,109 INFO L325 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-04-14 01:42:58,109 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2025-04-14 01:42:58,146 INFO L325 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2025-04-14 01:42:58,146 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2025-04-14 01:42:58,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:42:58,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066885933] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:42:58,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:42:58,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 25 [2025-04-14 01:42:58,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902552461] [2025-04-14 01:42:58,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:42:58,173 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-04-14 01:42:58,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:42:58,173 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-04-14 01:42:58,173 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2025-04-14 01:42:58,173 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:42:58,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 706 transitions, 15699 flow. Second operand has 27 states, 27 states have (on average 3.740740740740741) internal successors, (101), 27 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:42:58,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:42:58,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:42:58,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:42:59,582 INFO L116 PetriNetUnfolderBase]: 2089/3882 cut-off events. [2025-04-14 01:42:59,582 INFO L117 PetriNetUnfolderBase]: For 93483/93483 co-relation queries the response was YES. [2025-04-14 01:42:59,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39457 conditions, 3882 events. 2089/3882 cut-off events. For 93483/93483 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 26583 event pairs, 132 based on Foata normal form. 2/3884 useless extension candidates. Maximal degree in co-relation 39336. Up to 3614 conditions per place. [2025-04-14 01:42:59,626 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 652 selfloop transitions, 105 changer transitions 9/766 dead transitions. [2025-04-14 01:42:59,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 766 transitions, 17863 flow [2025-04-14 01:42:59,626 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-04-14 01:42:59,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-04-14 01:42:59,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 170 transitions. [2025-04-14 01:42:59,627 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.35789473684210527 [2025-04-14 01:42:59,627 INFO L175 Difference]: Start difference. First operand has 395 places, 706 transitions, 15699 flow. Second operand 25 states and 170 transitions. [2025-04-14 01:42:59,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 766 transitions, 17863 flow [2025-04-14 01:43:00,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 766 transitions, 17584 flow, removed 41 selfloop flow, removed 23 redundant places. [2025-04-14 01:43:00,101 INFO L231 Difference]: Finished difference. Result has 400 places, 722 transitions, 16084 flow [2025-04-14 01:43:00,102 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=15420, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=16084, PETRI_PLACES=400, PETRI_TRANSITIONS=722} [2025-04-14 01:43:00,102 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 380 predicate places. [2025-04-14 01:43:00,102 INFO L485 AbstractCegarLoop]: Abstraction has has 400 places, 722 transitions, 16084 flow [2025-04-14 01:43:00,102 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.740740740740741) internal successors, (101), 27 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:43:00,102 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:43:00,102 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:43:00,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2025-04-14 01:43:00,303 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:43:00,303 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:43:00,303 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:43:00,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1255227875, now seen corresponding path program 8 times [2025-04-14 01:43:00,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:43:00,304 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452371456] [2025-04-14 01:43:00,304 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:43:00,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:43:00,308 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:43:00,317 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:43:00,317 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:43:00,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:43:00,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:43:00,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:43:00,868 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452371456] [2025-04-14 01:43:00,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452371456] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:43:00,868 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67230356] [2025-04-14 01:43:00,868 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:43:00,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:43:00,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:43:00,870 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:43:00,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2025-04-14 01:43:00,911 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:43:00,923 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:43:00,923 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:43:00,923 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:43:00,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-04-14 01:43:00,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:43:01,073 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:43:01,073 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 71 [2025-04-14 01:43:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:43:01,123 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:43:01,295 INFO L325 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-04-14 01:43:01,295 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2025-04-14 01:43:01,331 INFO L325 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2025-04-14 01:43:01,331 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2025-04-14 01:43:01,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:43:01,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67230356] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:43:01,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:43:01,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 25 [2025-04-14 01:43:01,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747265752] [2025-04-14 01:43:01,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:43:01,358 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-04-14 01:43:01,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:43:01,359 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-04-14 01:43:01,359 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2025-04-14 01:43:01,359 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:43:01,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 722 transitions, 16084 flow. Second operand has 27 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:43:01,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:43:01,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:43:01,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:43:02,778 INFO L116 PetriNetUnfolderBase]: 2155/3994 cut-off events. [2025-04-14 01:43:02,779 INFO L117 PetriNetUnfolderBase]: For 98412/98412 co-relation queries the response was YES. [2025-04-14 01:43:02,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40895 conditions, 3994 events. 2155/3994 cut-off events. For 98412/98412 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 27428 event pairs, 121 based on Foata normal form. 2/3996 useless extension candidates. Maximal degree in co-relation 40773. Up to 3710 conditions per place. [2025-04-14 01:43:02,820 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 708 selfloop transitions, 102 changer transitions 12/822 dead transitions. [2025-04-14 01:43:02,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 822 transitions, 19077 flow [2025-04-14 01:43:02,820 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-04-14 01:43:02,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-04-14 01:43:02,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 193 transitions. [2025-04-14 01:43:02,821 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3762183235867446 [2025-04-14 01:43:02,821 INFO L175 Difference]: Start difference. First operand has 400 places, 722 transitions, 16084 flow. Second operand 27 states and 193 transitions. [2025-04-14 01:43:02,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 822 transitions, 19077 flow [2025-04-14 01:43:03,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 822 transitions, 18832 flow, removed 71 selfloop flow, removed 16 redundant places. [2025-04-14 01:43:03,299 INFO L231 Difference]: Finished difference. Result has 418 places, 757 transitions, 17041 flow [2025-04-14 01:43:03,299 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=15851, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=17041, PETRI_PLACES=418, PETRI_TRANSITIONS=757} [2025-04-14 01:43:03,299 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 398 predicate places. [2025-04-14 01:43:03,299 INFO L485 AbstractCegarLoop]: Abstraction has has 418 places, 757 transitions, 17041 flow [2025-04-14 01:43:03,300 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:43:03,300 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:43:03,300 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:43:03,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2025-04-14 01:43:03,500 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:43:03,500 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:43:03,500 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:43:03,501 INFO L85 PathProgramCache]: Analyzing trace with hash -510525377, now seen corresponding path program 9 times [2025-04-14 01:43:03,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:43:03,501 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369880077] [2025-04-14 01:43:03,501 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:43:03,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:43:03,505 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 3 equivalence classes. [2025-04-14 01:43:03,514 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:43:03,514 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 01:43:03,514 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:43:04,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:43:04,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:43:04,013 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369880077] [2025-04-14 01:43:04,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369880077] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:43:04,013 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120381786] [2025-04-14 01:43:04,013 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:43:04,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:43:04,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:43:04,015 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:43:04,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2025-04-14 01:43:04,060 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 3 equivalence classes. [2025-04-14 01:43:04,072 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:43:04,073 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 01:43:04,073 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:43:04,073 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-04-14 01:43:04,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:43:04,235 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:43:04,235 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 71 [2025-04-14 01:43:04,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:43:04,284 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:43:04,433 INFO L325 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-04-14 01:43:04,433 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2025-04-14 01:43:04,472 INFO L325 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2025-04-14 01:43:04,472 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2025-04-14 01:43:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:43:04,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120381786] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:43:04,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:43:04,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 25 [2025-04-14 01:43:04,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774426498] [2025-04-14 01:43:04,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:43:04,521 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-04-14 01:43:04,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:43:04,522 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-04-14 01:43:04,522 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2025-04-14 01:43:04,522 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:43:04,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 757 transitions, 17041 flow. Second operand has 27 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:43:04,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:43:04,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:43:04,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:43:05,849 INFO L116 PetriNetUnfolderBase]: 2218/4092 cut-off events. [2025-04-14 01:43:05,849 INFO L117 PetriNetUnfolderBase]: For 105857/105857 co-relation queries the response was YES. [2025-04-14 01:43:05,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42695 conditions, 4092 events. 2218/4092 cut-off events. For 105857/105857 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 28109 event pairs, 123 based on Foata normal form. 2/4094 useless extension candidates. Maximal degree in co-relation 42566. Up to 3859 conditions per place. [2025-04-14 01:43:05,888 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 744 selfloop transitions, 89 changer transitions 8/841 dead transitions. [2025-04-14 01:43:05,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 841 transitions, 19861 flow [2025-04-14 01:43:05,888 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-04-14 01:43:05,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-04-14 01:43:05,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 175 transitions. [2025-04-14 01:43:05,889 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3684210526315789 [2025-04-14 01:43:05,889 INFO L175 Difference]: Start difference. First operand has 418 places, 757 transitions, 17041 flow. Second operand 25 states and 175 transitions. [2025-04-14 01:43:05,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 841 transitions, 19861 flow [2025-04-14 01:43:06,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 841 transitions, 19544 flow, removed 128 selfloop flow, removed 14 redundant places. [2025-04-14 01:43:06,461 INFO L231 Difference]: Finished difference. Result has 435 places, 786 transitions, 17789 flow [2025-04-14 01:43:06,461 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=16732, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=17789, PETRI_PLACES=435, PETRI_TRANSITIONS=786} [2025-04-14 01:43:06,461 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 415 predicate places. [2025-04-14 01:43:06,461 INFO L485 AbstractCegarLoop]: Abstraction has has 435 places, 786 transitions, 17789 flow [2025-04-14 01:43:06,461 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:43:06,461 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:43:06,461 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:43:06,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2025-04-14 01:43:06,664 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2025-04-14 01:43:06,665 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:43:06,665 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:43:06,665 INFO L85 PathProgramCache]: Analyzing trace with hash 374872639, now seen corresponding path program 11 times [2025-04-14 01:43:06,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:43:06,665 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470131000] [2025-04-14 01:43:06,665 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:43:06,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:43:06,669 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:43:06,673 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:43:06,673 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:43:06,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:43:06,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:43:06,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:43:06,765 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470131000] [2025-04-14 01:43:06,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470131000] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:43:06,765 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008152573] [2025-04-14 01:43:06,765 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:43:06,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:43:06,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:43:06,766 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:43:06,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2025-04-14 01:43:06,808 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:43:06,842 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:43:06,842 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:43:06,842 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:43:06,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 01:43:06,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:43:06,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:43:06,892 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:43:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:43:07,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008152573] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:43:07,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:43:07,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2025-04-14 01:43:07,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131043847] [2025-04-14 01:43:07,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:43:07,094 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 01:43:07,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:43:07,094 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 01:43:07,094 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2025-04-14 01:43:07,094 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:43:07,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 786 transitions, 17789 flow. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 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 01:43:07,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:43:07,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:43:07,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:43:11,665 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-14 01:43:12,710 INFO L116 PetriNetUnfolderBase]: 2276/4183 cut-off events. [2025-04-14 01:43:12,710 INFO L117 PetriNetUnfolderBase]: For 114082/114082 co-relation queries the response was YES. [2025-04-14 01:43:12,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44104 conditions, 4183 events. 2276/4183 cut-off events. For 114082/114082 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 28743 event pairs, 411 based on Foata normal form. 15/4198 useless extension candidates. Maximal degree in co-relation 43967. Up to 2178 conditions per place. [2025-04-14 01:43:12,754 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 543 selfloop transitions, 362 changer transitions 4/909 dead transitions. [2025-04-14 01:43:12,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 909 transitions, 21449 flow [2025-04-14 01:43:12,755 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-04-14 01:43:12,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2025-04-14 01:43:12,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 216 transitions. [2025-04-14 01:43:12,755 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.37894736842105264 [2025-04-14 01:43:12,755 INFO L175 Difference]: Start difference. First operand has 435 places, 786 transitions, 17789 flow. Second operand 30 states and 216 transitions. [2025-04-14 01:43:12,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 909 transitions, 21449 flow [2025-04-14 01:43:13,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 909 transitions, 21066 flow, removed 156 selfloop flow, removed 14 redundant places. [2025-04-14 01:43:13,488 INFO L231 Difference]: Finished difference. Result has 450 places, 827 transitions, 19353 flow [2025-04-14 01:43:13,489 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=17404, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=19353, PETRI_PLACES=450, PETRI_TRANSITIONS=827} [2025-04-14 01:43:13,489 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 430 predicate places. [2025-04-14 01:43:13,489 INFO L485 AbstractCegarLoop]: Abstraction has has 450 places, 827 transitions, 19353 flow [2025-04-14 01:43:13,489 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 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 01:43:13,489 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:43:13,489 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:43:13,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2025-04-14 01:43:13,690 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2025-04-14 01:43:13,690 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:43:13,690 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:43:13,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1282610175, now seen corresponding path program 10 times [2025-04-14 01:43:13,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:43:13,690 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720979503] [2025-04-14 01:43:13,690 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:43:13,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:43:13,694 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:43:13,701 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:43:13,701 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:43:13,701 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:43:14,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:43:14,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:43:14,022 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720979503] [2025-04-14 01:43:14,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720979503] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:43:14,022 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246140487] [2025-04-14 01:43:14,022 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:43:14,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:43:14,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:43:14,024 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:43:14,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2025-04-14 01:43:14,066 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:43:14,078 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:43:14,078 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:43:14,078 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:43:14,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-04-14 01:43:14,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:43:14,224 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:43:14,224 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 64 [2025-04-14 01:43:14,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:43:14,277 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:43:14,461 INFO L325 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2025-04-14 01:43:14,462 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2025-04-14 01:43:14,547 INFO L325 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-04-14 01:43:14,548 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2025-04-14 01:43:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:43:14,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246140487] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:43:14,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:43:14,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 24 [2025-04-14 01:43:14,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760246380] [2025-04-14 01:43:14,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:43:14,604 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-04-14 01:43:14,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:43:14,604 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-04-14 01:43:14,604 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2025-04-14 01:43:14,604 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:43:14,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 827 transitions, 19353 flow. Second operand has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 26 states have internal predecessors, (99), 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 01:43:14,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:43:14,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:43:14,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:43:16,209 INFO L116 PetriNetUnfolderBase]: 2359/4322 cut-off events. [2025-04-14 01:43:16,210 INFO L117 PetriNetUnfolderBase]: For 116884/116884 co-relation queries the response was YES. [2025-04-14 01:43:16,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46404 conditions, 4322 events. 2359/4322 cut-off events. For 116884/116884 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 29760 event pairs, 135 based on Foata normal form. 2/4324 useless extension candidates. Maximal degree in co-relation 46267. Up to 4069 conditions per place. [2025-04-14 01:43:16,258 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 817 selfloop transitions, 104 changer transitions 5/926 dead transitions. [2025-04-14 01:43:16,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 926 transitions, 22453 flow [2025-04-14 01:43:16,259 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-04-14 01:43:16,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-04-14 01:43:16,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 206 transitions. [2025-04-14 01:43:16,259 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.34974533106960953 [2025-04-14 01:43:16,260 INFO L175 Difference]: Start difference. First operand has 450 places, 827 transitions, 19353 flow. Second operand 31 states and 206 transitions. [2025-04-14 01:43:16,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 926 transitions, 22453 flow [2025-04-14 01:43:16,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 926 transitions, 21179 flow, removed 239 selfloop flow, removed 16 redundant places. [2025-04-14 01:43:16,932 INFO L231 Difference]: Finished difference. Result has 471 places, 873 transitions, 19381 flow [2025-04-14 01:43:16,932 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=18137, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=827, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=751, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=19381, PETRI_PLACES=471, PETRI_TRANSITIONS=873} [2025-04-14 01:43:16,932 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 451 predicate places. [2025-04-14 01:43:16,932 INFO L485 AbstractCegarLoop]: Abstraction has has 471 places, 873 transitions, 19381 flow [2025-04-14 01:43:16,932 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 26 states have internal predecessors, (99), 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 01:43:16,932 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:43:16,933 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:43:16,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2025-04-14 01:43:17,133 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2025-04-14 01:43:17,133 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:43:17,133 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:43:17,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1380705225, now seen corresponding path program 11 times [2025-04-14 01:43:17,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:43:17,134 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309261974] [2025-04-14 01:43:17,134 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:43:17,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:43:17,137 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 3 equivalence classes. [2025-04-14 01:43:17,145 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:43:17,145 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 01:43:17,145 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:43:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:43:17,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:43:17,602 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309261974] [2025-04-14 01:43:17,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309261974] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:43:17,602 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536485023] [2025-04-14 01:43:17,602 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:43:17,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:43:17,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:43:17,604 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:43:17,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2025-04-14 01:43:17,648 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 3 equivalence classes. [2025-04-14 01:43:17,660 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:43:17,660 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 01:43:17,660 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:43:17,661 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-04-14 01:43:17,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:43:17,830 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:43:17,830 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2025-04-14 01:43:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:43:17,833 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:43:18,037 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:43:18,037 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 133 treesize of output 158 [2025-04-14 01:43:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:43:18,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536485023] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:43:18,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:43:18,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 26 [2025-04-14 01:43:18,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531693400] [2025-04-14 01:43:18,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:43:18,270 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-14 01:43:18,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:43:18,270 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-14 01:43:18,270 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2025-04-14 01:43:18,270 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:43:18,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 873 transitions, 19381 flow. Second operand has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 28 states have internal predecessors, (103), 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 01:43:18,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:43:18,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:43:18,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:43:20,208 INFO L116 PetriNetUnfolderBase]: 2421/4425 cut-off events. [2025-04-14 01:43:20,208 INFO L117 PetriNetUnfolderBase]: For 114258/114258 co-relation queries the response was YES. [2025-04-14 01:43:20,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46288 conditions, 4425 events. 2421/4425 cut-off events. For 114258/114258 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 30579 event pairs, 136 based on Foata normal form. 7/4432 useless extension candidates. Maximal degree in co-relation 46145. Up to 4201 conditions per place. [2025-04-14 01:43:20,253 INFO L140 encePairwiseOnDemand]: 8/19 looper letters, 856 selfloop transitions, 91 changer transitions 14/961 dead transitions. [2025-04-14 01:43:20,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 961 transitions, 22451 flow [2025-04-14 01:43:20,254 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-04-14 01:43:20,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-04-14 01:43:20,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 195 transitions. [2025-04-14 01:43:20,254 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.38011695906432746 [2025-04-14 01:43:20,254 INFO L175 Difference]: Start difference. First operand has 471 places, 873 transitions, 19381 flow. Second operand 27 states and 195 transitions. [2025-04-14 01:43:20,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 961 transitions, 22451 flow [2025-04-14 01:43:20,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 961 transitions, 22125 flow, removed 104 selfloop flow, removed 14 redundant places. [2025-04-14 01:43:20,947 INFO L231 Difference]: Finished difference. Result has 491 places, 899 transitions, 20045 flow [2025-04-14 01:43:20,947 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=19133, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=787, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=20045, PETRI_PLACES=491, PETRI_TRANSITIONS=899} [2025-04-14 01:43:20,947 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 471 predicate places. [2025-04-14 01:43:20,947 INFO L485 AbstractCegarLoop]: Abstraction has has 491 places, 899 transitions, 20045 flow [2025-04-14 01:43:20,948 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 28 states have internal predecessors, (103), 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 01:43:20,948 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:43:20,948 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:43:20,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2025-04-14 01:43:21,148 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2025-04-14 01:43:21,148 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:43:21,148 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:43:21,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1294013415, now seen corresponding path program 12 times [2025-04-14 01:43:21,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:43:21,149 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117583157] [2025-04-14 01:43:21,149 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:43:21,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:43:21,152 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:43:21,159 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:43:21,159 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:43:21,159 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:43:21,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:43:21,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:43:21,610 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117583157] [2025-04-14 01:43:21,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117583157] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:43:21,610 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786636723] [2025-04-14 01:43:21,610 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:43:21,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:43:21,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:43:21,612 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:43:21,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2025-04-14 01:43:21,655 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:43:21,667 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:43:21,667 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:43:21,667 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:43:21,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-04-14 01:43:21,668 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:43:21,840 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:43:21,840 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 60 [2025-04-14 01:43:21,908 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:43:21,908 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:43:22,044 INFO L325 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-04-14 01:43:22,044 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2025-04-14 01:43:22,081 INFO L325 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2025-04-14 01:43:22,081 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2025-04-14 01:43:22,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:43:22,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786636723] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:43:22,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:43:22,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 25 [2025-04-14 01:43:22,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801069854] [2025-04-14 01:43:22,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:43:22,129 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-04-14 01:43:22,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:43:22,129 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-04-14 01:43:22,129 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2025-04-14 01:43:22,129 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:43:22,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 899 transitions, 20045 flow. Second operand has 27 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:43:22,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:43:22,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:43:22,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:43:23,752 INFO L116 PetriNetUnfolderBase]: 2429/4447 cut-off events. [2025-04-14 01:43:23,752 INFO L117 PetriNetUnfolderBase]: For 119591/119591 co-relation queries the response was YES. [2025-04-14 01:43:23,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47074 conditions, 4447 events. 2429/4447 cut-off events. For 119591/119591 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 30973 event pairs, 134 based on Foata normal form. 2/4449 useless extension candidates. Maximal degree in co-relation 46922. Up to 4203 conditions per place. [2025-04-14 01:43:23,797 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 855 selfloop transitions, 95 changer transitions 6/956 dead transitions. [2025-04-14 01:43:23,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 956 transitions, 22622 flow [2025-04-14 01:43:23,797 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-04-14 01:43:23,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-04-14 01:43:23,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 165 transitions. [2025-04-14 01:43:23,798 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3618421052631579 [2025-04-14 01:43:23,798 INFO L175 Difference]: Start difference. First operand has 491 places, 899 transitions, 20045 flow. Second operand 24 states and 165 transitions. [2025-04-14 01:43:23,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 956 transitions, 22622 flow [2025-04-14 01:43:24,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 956 transitions, 22128 flow, removed 128 selfloop flow, removed 20 redundant places. [2025-04-14 01:43:24,546 INFO L231 Difference]: Finished difference. Result has 496 places, 910 transitions, 20103 flow [2025-04-14 01:43:24,546 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=19555, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=899, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=806, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=20103, PETRI_PLACES=496, PETRI_TRANSITIONS=910} [2025-04-14 01:43:24,547 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 476 predicate places. [2025-04-14 01:43:24,547 INFO L485 AbstractCegarLoop]: Abstraction has has 496 places, 910 transitions, 20103 flow [2025-04-14 01:43:24,547 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:43:24,547 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:43:24,547 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:43:24,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2025-04-14 01:43:24,747 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:43:24,747 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:43:24,748 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:43:24,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1377130305, now seen corresponding path program 13 times [2025-04-14 01:43:24,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:43:24,748 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053680245] [2025-04-14 01:43:24,748 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:43:24,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:43:24,751 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-14 01:43:24,756 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:43:24,756 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:43:24,756 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:43:25,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:43:25,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:43:25,193 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053680245] [2025-04-14 01:43:25,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053680245] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:43:25,193 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454402158] [2025-04-14 01:43:25,193 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:43:25,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:43:25,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:43:25,195 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:43:25,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2025-04-14 01:43:25,243 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-14 01:43:25,254 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:43:25,254 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:43:25,254 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:43:25,255 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-04-14 01:43:25,256 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:43:25,383 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:43:25,383 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 75 [2025-04-14 01:43:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:43:25,447 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:43:25,635 INFO L325 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2025-04-14 01:43:25,635 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2025-04-14 01:43:25,722 INFO L325 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-04-14 01:43:25,722 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2025-04-14 01:43:25,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:43:25,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454402158] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:43:25,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:43:25,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 24 [2025-04-14 01:43:25,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767041874] [2025-04-14 01:43:25,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:43:25,784 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-04-14 01:43:25,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:43:25,784 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-04-14 01:43:25,784 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2025-04-14 01:43:25,784 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:43:25,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 910 transitions, 20103 flow. Second operand has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 26 states have internal predecessors, (99), 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 01:43:25,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:43:25,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:43:25,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:43:27,417 INFO L116 PetriNetUnfolderBase]: 2626/4785 cut-off events. [2025-04-14 01:43:27,417 INFO L117 PetriNetUnfolderBase]: For 131919/131919 co-relation queries the response was YES. [2025-04-14 01:43:27,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50339 conditions, 4785 events. 2626/4785 cut-off events. For 131919/131919 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 33706 event pairs, 140 based on Foata normal form. 4/4789 useless extension candidates. Maximal degree in co-relation 50184. Up to 4302 conditions per place. [2025-04-14 01:43:27,465 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 914 selfloop transitions, 134 changer transitions 9/1057 dead transitions. [2025-04-14 01:43:27,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 1057 transitions, 24461 flow [2025-04-14 01:43:27,465 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-04-14 01:43:27,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-04-14 01:43:27,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 197 transitions. [2025-04-14 01:43:27,466 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.37030075187969924 [2025-04-14 01:43:27,466 INFO L175 Difference]: Start difference. First operand has 496 places, 910 transitions, 20103 flow. Second operand 28 states and 197 transitions. [2025-04-14 01:43:27,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 1057 transitions, 24461 flow [2025-04-14 01:43:28,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 1057 transitions, 24207 flow, removed 75 selfloop flow, removed 17 redundant places. [2025-04-14 01:43:28,276 INFO L231 Difference]: Finished difference. Result has 513 places, 964 transitions, 21499 flow [2025-04-14 01:43:28,276 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=19853, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=910, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=778, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=21499, PETRI_PLACES=513, PETRI_TRANSITIONS=964} [2025-04-14 01:43:28,277 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 493 predicate places. [2025-04-14 01:43:28,277 INFO L485 AbstractCegarLoop]: Abstraction has has 513 places, 964 transitions, 21499 flow [2025-04-14 01:43:28,277 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 26 states have internal predecessors, (99), 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 01:43:28,277 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:43:28,277 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:43:28,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2025-04-14 01:43:28,477 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2025-04-14 01:43:28,477 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:43:28,478 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:43:28,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1682514499, now seen corresponding path program 14 times [2025-04-14 01:43:28,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:43:28,478 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623111227] [2025-04-14 01:43:28,478 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:43:28,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:43:28,481 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:43:28,485 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:43:28,485 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:43:28,485 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:43:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:43:28,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:43:28,660 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623111227] [2025-04-14 01:43:28,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623111227] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:43:28,660 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442154923] [2025-04-14 01:43:28,660 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:43:28,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:43:28,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:43:28,662 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:43:28,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2025-04-14 01:43:28,708 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:43:28,746 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:43:28,746 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:43:28,746 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:43:28,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-04-14 01:43:28,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:43:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:43:28,789 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:43:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-04-14 01:43:28,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442154923] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:43:28,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:43:28,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 15 [2025-04-14 01:43:28,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642236171] [2025-04-14 01:43:28,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:43:28,831 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-14 01:43:28,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:43:28,831 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-14 01:43:28,831 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2025-04-14 01:43:28,831 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:43:28,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 964 transitions, 21499 flow. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 15 states have internal predecessors, (61), 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 01:43:28,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:43:28,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:43:28,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:43:30,877 INFO L116 PetriNetUnfolderBase]: 2749/5088 cut-off events. [2025-04-14 01:43:30,877 INFO L117 PetriNetUnfolderBase]: For 161890/161890 co-relation queries the response was YES. [2025-04-14 01:43:30,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54271 conditions, 5088 events. 2749/5088 cut-off events. For 161890/161890 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 36714 event pairs, 71 based on Foata normal form. 52/5140 useless extension candidates. Maximal degree in co-relation 54108. Up to 1441 conditions per place. [2025-04-14 01:43:30,926 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 598 selfloop transitions, 569 changer transitions 6/1173 dead transitions. [2025-04-14 01:43:30,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 1173 transitions, 27992 flow [2025-04-14 01:43:30,926 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-04-14 01:43:30,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-04-14 01:43:30,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 209 transitions. [2025-04-14 01:43:30,927 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.34375 [2025-04-14 01:43:30,927 INFO L175 Difference]: Start difference. First operand has 513 places, 964 transitions, 21499 flow. Second operand 32 states and 209 transitions. [2025-04-14 01:43:30,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 1173 transitions, 27992 flow [2025-04-14 01:43:31,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 1173 transitions, 27639 flow, removed 125 selfloop flow, removed 18 redundant places. [2025-04-14 01:43:31,861 INFO L231 Difference]: Finished difference. Result has 533 places, 1017 transitions, 24280 flow [2025-04-14 01:43:31,862 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=21140, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=961, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=517, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=24280, PETRI_PLACES=533, PETRI_TRANSITIONS=1017} [2025-04-14 01:43:31,862 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 513 predicate places. [2025-04-14 01:43:31,862 INFO L485 AbstractCegarLoop]: Abstraction has has 533 places, 1017 transitions, 24280 flow [2025-04-14 01:43:31,862 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 15 states have internal predecessors, (61), 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 01:43:31,862 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:43:31,862 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:43:31,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2025-04-14 01:43:32,062 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2025-04-14 01:43:32,063 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:43:32,063 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:43:32,063 INFO L85 PathProgramCache]: Analyzing trace with hash 485874423, now seen corresponding path program 15 times [2025-04-14 01:43:32,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:43:32,063 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470336856] [2025-04-14 01:43:32,063 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:43:32,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:43:32,067 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:43:32,075 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:43:32,076 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:43:32,076 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:43:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:43:32,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:43:32,518 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470336856] [2025-04-14 01:43:32,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470336856] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:43:32,518 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851762583] [2025-04-14 01:43:32,518 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:43:32,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:43:32,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:43:32,520 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:43:32,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2025-04-14 01:43:32,566 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:43:32,578 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:43:32,578 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:43:32,578 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:43:32,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-04-14 01:43:32,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:43:32,775 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:43:32,776 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 60 [2025-04-14 01:43:32,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:43:32,816 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:43:33,032 INFO L325 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-04-14 01:43:33,032 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2025-04-14 01:43:33,071 INFO L325 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2025-04-14 01:43:33,072 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2025-04-14 01:43:33,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:43:33,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851762583] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:43:33,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:43:33,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 25 [2025-04-14 01:43:33,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611715174] [2025-04-14 01:43:33,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:43:33,098 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-04-14 01:43:33,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:43:33,099 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-04-14 01:43:33,099 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2025-04-14 01:43:33,099 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:43:33,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 1017 transitions, 24280 flow. Second operand has 27 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:43:33,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:43:33,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:43:33,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:43:35,275 INFO L116 PetriNetUnfolderBase]: 2866/5255 cut-off events. [2025-04-14 01:43:35,275 INFO L117 PetriNetUnfolderBase]: For 171108/171108 co-relation queries the response was YES. [2025-04-14 01:43:35,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58394 conditions, 5255 events. 2866/5255 cut-off events. For 171108/171108 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 38049 event pairs, 156 based on Foata normal form. 1/5256 useless extension candidates. Maximal degree in co-relation 58222. Up to 4654 conditions per place. [2025-04-14 01:43:35,335 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 974 selfloop transitions, 192 changer transitions 4/1170 dead transitions. [2025-04-14 01:43:35,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 1170 transitions, 29196 flow [2025-04-14 01:43:35,335 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-04-14 01:43:35,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-04-14 01:43:35,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 202 transitions. [2025-04-14 01:43:35,336 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.33223684210526316 [2025-04-14 01:43:35,336 INFO L175 Difference]: Start difference. First operand has 533 places, 1017 transitions, 24280 flow. Second operand 32 states and 202 transitions. [2025-04-14 01:43:35,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 1170 transitions, 29196 flow [2025-04-14 01:43:36,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 1170 transitions, 27593 flow, removed 310 selfloop flow, removed 23 redundant places. [2025-04-14 01:43:36,577 INFO L231 Difference]: Finished difference. Result has 548 places, 1066 transitions, 24577 flow [2025-04-14 01:43:36,578 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=22786, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=830, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=24577, PETRI_PLACES=548, PETRI_TRANSITIONS=1066} [2025-04-14 01:43:36,578 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 528 predicate places. [2025-04-14 01:43:36,578 INFO L485 AbstractCegarLoop]: Abstraction has has 548 places, 1066 transitions, 24577 flow [2025-04-14 01:43:36,578 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:43:36,578 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:43:36,579 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:43:36,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2025-04-14 01:43:36,779 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2025-04-14 01:43:36,779 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:43:36,780 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:43:36,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1283598857, now seen corresponding path program 12 times [2025-04-14 01:43:36,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:43:36,780 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207380764] [2025-04-14 01:43:36,780 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:43:36,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:43:36,784 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:43:36,789 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:43:36,789 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:43:36,789 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:43:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:43:36,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:43:36,901 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207380764] [2025-04-14 01:43:36,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207380764] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:43:36,901 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615271295] [2025-04-14 01:43:36,901 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:43:36,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:43:36,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:43:36,903 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:43:36,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2025-04-14 01:43:36,954 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:43:37,008 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:43:37,008 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:43:37,008 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:43:37,009 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 01:43:37,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:43:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:43:37,082 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:43:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:43:37,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615271295] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:43:37,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:43:37,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2025-04-14 01:43:37,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027214277] [2025-04-14 01:43:37,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:43:37,290 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-14 01:43:37,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:43:37,291 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-14 01:43:37,291 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2025-04-14 01:43:37,291 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:43:37,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 1066 transitions, 24577 flow. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 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 01:43:37,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:43:37,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:43:37,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:43:40,671 INFO L116 PetriNetUnfolderBase]: 3990/7090 cut-off events. [2025-04-14 01:43:40,671 INFO L117 PetriNetUnfolderBase]: For 200416/200416 co-relation queries the response was YES. [2025-04-14 01:43:40,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75631 conditions, 7090 events. 3990/7090 cut-off events. For 200416/200416 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 51834 event pairs, 68 based on Foata normal form. 30/7120 useless extension candidates. Maximal degree in co-relation 75455. Up to 2476 conditions per place. [2025-04-14 01:43:40,757 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 564 selfloop transitions, 949 changer transitions 0/1513 dead transitions. [2025-04-14 01:43:40,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 581 places, 1513 transitions, 37290 flow [2025-04-14 01:43:40,758 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-04-14 01:43:40,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2025-04-14 01:43:40,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 252 transitions. [2025-04-14 01:43:40,758 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.37894736842105264 [2025-04-14 01:43:40,758 INFO L175 Difference]: Start difference. First operand has 548 places, 1066 transitions, 24577 flow. Second operand 35 states and 252 transitions. [2025-04-14 01:43:40,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 581 places, 1513 transitions, 37290 flow [2025-04-14 01:43:42,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 1513 transitions, 36637 flow, removed 206 selfloop flow, removed 15 redundant places. [2025-04-14 01:43:42,349 INFO L231 Difference]: Finished difference. Result has 573 places, 1309 transitions, 32532 flow [2025-04-14 01:43:42,349 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=24080, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1066, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=732, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=32532, PETRI_PLACES=573, PETRI_TRANSITIONS=1309} [2025-04-14 01:43:42,350 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 553 predicate places. [2025-04-14 01:43:42,350 INFO L485 AbstractCegarLoop]: Abstraction has has 573 places, 1309 transitions, 32532 flow [2025-04-14 01:43:42,350 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 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 01:43:42,350 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:43:42,350 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:43:42,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2025-04-14 01:43:42,550 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:43:42,550 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:43:42,551 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:43:42,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1200308987, now seen corresponding path program 13 times [2025-04-14 01:43:42,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:43:42,551 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952855765] [2025-04-14 01:43:42,551 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:43:42,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:43:42,554 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-14 01:43:42,558 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:43:42,558 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:43:42,559 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:43:42,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:43:42,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:43:42,665 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952855765] [2025-04-14 01:43:42,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952855765] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:43:42,665 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848277816] [2025-04-14 01:43:42,665 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:43:42,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:43:42,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:43:42,668 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:43:42,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2025-04-14 01:43:42,713 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-14 01:43:42,755 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:43:42,755 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:43:42,755 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:43:42,755 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 01:43:42,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:43:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:43:42,789 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:43:42,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:43:42,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848277816] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:43:42,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:43:42,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2025-04-14 01:43:42,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579210255] [2025-04-14 01:43:42,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:43:42,900 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-14 01:43:42,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:43:42,901 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-14 01:43:42,901 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2025-04-14 01:43:42,901 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:43:42,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 573 places, 1309 transitions, 32532 flow. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 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 01:43:42,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:43:42,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:43:42,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:43:46,992 INFO L116 PetriNetUnfolderBase]: 4561/8101 cut-off events. [2025-04-14 01:43:46,993 INFO L117 PetriNetUnfolderBase]: For 261419/261419 co-relation queries the response was YES. [2025-04-14 01:43:47,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91954 conditions, 8101 events. 4561/8101 cut-off events. For 261419/261419 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 60484 event pairs, 92 based on Foata normal form. 54/8155 useless extension candidates. Maximal degree in co-relation 91778. Up to 2886 conditions per place. [2025-04-14 01:43:47,082 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 466 selfloop transitions, 1181 changer transitions 0/1647 dead transitions. [2025-04-14 01:43:47,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 1647 transitions, 42759 flow [2025-04-14 01:43:47,082 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-04-14 01:43:47,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2025-04-14 01:43:47,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 289 transitions. [2025-04-14 01:43:47,083 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3900134952766532 [2025-04-14 01:43:47,083 INFO L175 Difference]: Start difference. First operand has 573 places, 1309 transitions, 32532 flow. Second operand 39 states and 289 transitions. [2025-04-14 01:43:47,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 1647 transitions, 42759 flow [2025-04-14 01:43:48,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 604 places, 1647 transitions, 41120 flow, removed 719 selfloop flow, removed 7 redundant places. [2025-04-14 01:43:49,009 INFO L231 Difference]: Finished difference. Result has 609 places, 1496 transitions, 38777 flow [2025-04-14 01:43:49,010 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=31032, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1014, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=38777, PETRI_PLACES=609, PETRI_TRANSITIONS=1496} [2025-04-14 01:43:49,010 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 589 predicate places. [2025-04-14 01:43:49,010 INFO L485 AbstractCegarLoop]: Abstraction has has 609 places, 1496 transitions, 38777 flow [2025-04-14 01:43:49,010 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 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 01:43:49,010 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:43:49,011 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:43:49,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2025-04-14 01:43:49,211 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:43:49,211 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:43:49,212 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:43:49,212 INFO L85 PathProgramCache]: Analyzing trace with hash -756157837, now seen corresponding path program 16 times [2025-04-14 01:43:49,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:43:49,212 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881757551] [2025-04-14 01:43:49,212 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:43:49,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:43:49,215 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:43:49,222 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:43:49,222 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:43:49,222 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:43:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:43:49,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:43:49,854 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881757551] [2025-04-14 01:43:49,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881757551] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:43:49,854 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925862070] [2025-04-14 01:43:49,854 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:43:49,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:43:49,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:43:49,856 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:43:49,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2025-04-14 01:43:49,916 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:43:49,932 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:43:49,932 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:43:49,932 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:43:49,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-14 01:43:49,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:43:50,092 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:43:50,092 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 64 [2025-04-14 01:43:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:43:50,133 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:43:50,326 INFO L325 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2025-04-14 01:43:50,327 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2025-04-14 01:43:50,413 INFO L325 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-04-14 01:43:50,413 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2025-04-14 01:43:50,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:43:50,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925862070] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:43:50,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:43:50,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 23 [2025-04-14 01:43:50,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138783091] [2025-04-14 01:43:50,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:43:50,474 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-04-14 01:43:50,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:43:50,474 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-04-14 01:43:50,474 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2025-04-14 01:43:50,475 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:43:50,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 1496 transitions, 38777 flow. Second operand has 25 states, 25 states have (on average 3.84) internal successors, (96), 25 states have internal predecessors, (96), 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 01:43:50,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:43:50,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:43:50,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:43:53,953 INFO L116 PetriNetUnfolderBase]: 4650/8270 cut-off events. [2025-04-14 01:43:53,953 INFO L117 PetriNetUnfolderBase]: For 280649/280649 co-relation queries the response was YES. [2025-04-14 01:43:54,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95285 conditions, 8270 events. 4650/8270 cut-off events. For 280649/280649 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 62077 event pairs, 253 based on Foata normal form. 2/8272 useless extension candidates. Maximal degree in co-relation 95105. Up to 7972 conditions per place. [2025-04-14 01:43:54,059 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 1468 selfloop transitions, 117 changer transitions 6/1591 dead transitions. [2025-04-14 01:43:54,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 635 places, 1591 transitions, 43663 flow [2025-04-14 01:43:54,060 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-04-14 01:43:54,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-04-14 01:43:54,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 182 transitions. [2025-04-14 01:43:54,060 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.35477582846003897 [2025-04-14 01:43:54,060 INFO L175 Difference]: Start difference. First operand has 609 places, 1496 transitions, 38777 flow. Second operand 27 states and 182 transitions. [2025-04-14 01:43:54,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 635 places, 1591 transitions, 43663 flow [2025-04-14 01:43:56,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 614 places, 1591 transitions, 41378 flow, removed 481 selfloop flow, removed 21 redundant places. [2025-04-14 01:43:56,620 INFO L231 Difference]: Finished difference. Result has 623 places, 1537 transitions, 38107 flow [2025-04-14 01:43:56,621 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=36548, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=38107, PETRI_PLACES=623, PETRI_TRANSITIONS=1537} [2025-04-14 01:43:56,621 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 603 predicate places. [2025-04-14 01:43:56,621 INFO L485 AbstractCegarLoop]: Abstraction has has 623 places, 1537 transitions, 38107 flow [2025-04-14 01:43:56,621 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 25 states have internal predecessors, (96), 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 01:43:56,621 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:43:56,621 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:43:56,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2025-04-14 01:43:56,822 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2025-04-14 01:43:56,822 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:43:56,822 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:43:56,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1196907047, now seen corresponding path program 14 times [2025-04-14 01:43:56,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:43:56,822 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783940235] [2025-04-14 01:43:56,823 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:43:56,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:43:56,826 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:43:56,831 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:43:56,831 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:43:56,831 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:43:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:43:56,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:43:56,955 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783940235] [2025-04-14 01:43:56,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783940235] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:43:56,955 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347803456] [2025-04-14 01:43:56,955 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:43:56,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:43:56,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:43:56,956 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:43:56,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2025-04-14 01:43:57,003 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:43:57,139 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:43:57,139 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:43:57,139 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:43:57,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 01:43:57,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:43:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:43:57,203 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:43:57,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:43:57,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347803456] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:43:57,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:43:57,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2025-04-14 01:43:57,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38359773] [2025-04-14 01:43:57,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:43:57,297 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-14 01:43:57,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:43:57,298 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-14 01:43:57,298 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2025-04-14 01:43:57,298 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:43:57,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 623 places, 1537 transitions, 38107 flow. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 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 01:43:57,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:43:57,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:43:57,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:44:02,279 INFO L116 PetriNetUnfolderBase]: 4797/8521 cut-off events. [2025-04-14 01:44:02,280 INFO L117 PetriNetUnfolderBase]: For 272806/272806 co-relation queries the response was YES. [2025-04-14 01:44:02,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93787 conditions, 8521 events. 4797/8521 cut-off events. For 272806/272806 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 64172 event pairs, 98 based on Foata normal form. 4/8525 useless extension candidates. Maximal degree in co-relation 93605. Up to 2732 conditions per place. [2025-04-14 01:44:02,410 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 707 selfloop transitions, 1036 changer transitions 0/1743 dead transitions. [2025-04-14 01:44:02,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 650 places, 1743 transitions, 45611 flow [2025-04-14 01:44:02,411 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-04-14 01:44:02,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-04-14 01:44:02,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 254 transitions. [2025-04-14 01:44:02,412 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4312393887945671 [2025-04-14 01:44:02,412 INFO L175 Difference]: Start difference. First operand has 623 places, 1537 transitions, 38107 flow. Second operand 31 states and 254 transitions. [2025-04-14 01:44:02,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 650 places, 1743 transitions, 45611 flow [2025-04-14 01:44:04,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 635 places, 1743 transitions, 44998 flow, removed 245 selfloop flow, removed 15 redundant places. [2025-04-14 01:44:04,970 INFO L231 Difference]: Finished difference. Result has 640 places, 1567 transitions, 40936 flow [2025-04-14 01:44:04,971 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=37470, PETRI_DIFFERENCE_MINUEND_PLACES=605, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1004, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=40936, PETRI_PLACES=640, PETRI_TRANSITIONS=1567} [2025-04-14 01:44:04,971 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 620 predicate places. [2025-04-14 01:44:04,971 INFO L485 AbstractCegarLoop]: Abstraction has has 640 places, 1567 transitions, 40936 flow [2025-04-14 01:44:04,971 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 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 01:44:04,971 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:44:04,971 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:44:04,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2025-04-14 01:44:05,172 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2025-04-14 01:44:05,172 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:44:05,173 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:44:05,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1976245785, now seen corresponding path program 15 times [2025-04-14 01:44:05,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:44:05,173 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813200071] [2025-04-14 01:44:05,173 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:44:05,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:44:05,177 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 3 equivalence classes. [2025-04-14 01:44:05,185 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:44:05,185 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 01:44:05,185 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:44:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:44:05,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:44:05,266 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813200071] [2025-04-14 01:44:05,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813200071] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:44:05,266 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143186402] [2025-04-14 01:44:05,266 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:44:05,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:44:05,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:44:05,268 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:44:05,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2025-04-14 01:44:05,318 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 3 equivalence classes. [2025-04-14 01:44:05,390 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:44:05,390 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 01:44:05,390 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:44:05,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 01:44:05,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:44:05,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:44:05,427 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:44:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:44:05,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143186402] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:44:05,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:44:05,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2025-04-14 01:44:05,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985131090] [2025-04-14 01:44:05,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:44:05,568 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-04-14 01:44:05,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:44:05,568 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-04-14 01:44:05,568 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2025-04-14 01:44:05,568 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:44:05,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 640 places, 1567 transitions, 40936 flow. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:44:05,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:44:05,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:44:05,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:44:09,627 INFO L116 PetriNetUnfolderBase]: 4838/8621 cut-off events. [2025-04-14 01:44:09,627 INFO L117 PetriNetUnfolderBase]: For 291849/291849 co-relation queries the response was YES. [2025-04-14 01:44:09,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97919 conditions, 8621 events. 4838/8621 cut-off events. For 291849/291849 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 65280 event pairs, 813 based on Foata normal form. 42/8663 useless extension candidates. Maximal degree in co-relation 97734. Up to 4174 conditions per place. [2025-04-14 01:44:09,750 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 915 selfloop transitions, 723 changer transitions 0/1638 dead transitions. [2025-04-14 01:44:09,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 659 places, 1638 transitions, 45258 flow [2025-04-14 01:44:09,751 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-04-14 01:44:09,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-04-14 01:44:09,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 129 transitions. [2025-04-14 01:44:09,751 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3394736842105263 [2025-04-14 01:44:09,751 INFO L175 Difference]: Start difference. First operand has 640 places, 1567 transitions, 40936 flow. Second operand 20 states and 129 transitions. [2025-04-14 01:44:09,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 659 places, 1638 transitions, 45258 flow [2025-04-14 01:44:12,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 643 places, 1638 transitions, 44168 flow, removed 59 selfloop flow, removed 16 redundant places. [2025-04-14 01:44:12,642 INFO L231 Difference]: Finished difference. Result has 646 places, 1579 transitions, 41597 flow [2025-04-14 01:44:12,643 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=39856, PETRI_DIFFERENCE_MINUEND_PLACES=624, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=714, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=850, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=41597, PETRI_PLACES=646, PETRI_TRANSITIONS=1579} [2025-04-14 01:44:12,643 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 626 predicate places. [2025-04-14 01:44:12,643 INFO L485 AbstractCegarLoop]: Abstraction has has 646 places, 1579 transitions, 41597 flow [2025-04-14 01:44:12,644 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:44:12,644 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:44:12,644 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:44:12,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2025-04-14 01:44:12,844 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2025-04-14 01:44:12,844 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:44:12,845 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:44:12,845 INFO L85 PathProgramCache]: Analyzing trace with hash 2136133325, now seen corresponding path program 17 times [2025-04-14 01:44:12,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:44:12,845 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766181156] [2025-04-14 01:44:12,845 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:44:12,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:44:12,849 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:44:12,857 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:44:12,857 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:44:12,857 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:44:13,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:44:13,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:44:13,490 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766181156] [2025-04-14 01:44:13,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766181156] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:44:13,490 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549472883] [2025-04-14 01:44:13,490 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:44:13,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:44:13,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:44:13,492 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:44:13,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2025-04-14 01:44:13,540 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:44:13,552 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:44:13,552 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:44:13,552 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:44:13,553 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-04-14 01:44:13,554 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:44:13,747 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:44:13,747 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2025-04-14 01:44:13,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:44:13,750 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:44:14,016 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:44:14,016 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 127 treesize of output 152 [2025-04-14 01:44:14,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:44:14,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549472883] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:44:14,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:44:14,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 26 [2025-04-14 01:44:14,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592834015] [2025-04-14 01:44:14,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:44:14,189 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-14 01:44:14,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:44:14,189 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-14 01:44:14,190 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2025-04-14 01:44:14,190 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:44:14,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 646 places, 1579 transitions, 41597 flow. Second operand has 28 states, 28 states have (on average 3.75) internal successors, (105), 28 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:44:14,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:44:14,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:44:14,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:44:19,042 INFO L116 PetriNetUnfolderBase]: 4883/8706 cut-off events. [2025-04-14 01:44:19,042 INFO L117 PetriNetUnfolderBase]: For 302806/302806 co-relation queries the response was YES. [2025-04-14 01:44:19,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100624 conditions, 8706 events. 4883/8706 cut-off events. For 302806/302806 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 66015 event pairs, 267 based on Foata normal form. 12/8718 useless extension candidates. Maximal degree in co-relation 100435. Up to 8375 conditions per place. [2025-04-14 01:44:19,334 INFO L140 encePairwiseOnDemand]: 8/19 looper letters, 1511 selfloop transitions, 143 changer transitions 15/1669 dead transitions. [2025-04-14 01:44:19,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 677 places, 1669 transitions, 46230 flow [2025-04-14 01:44:19,334 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-04-14 01:44:19,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-04-14 01:44:19,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 237 transitions. [2025-04-14 01:44:19,335 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.38980263157894735 [2025-04-14 01:44:19,335 INFO L175 Difference]: Start difference. First operand has 646 places, 1579 transitions, 41597 flow. Second operand 32 states and 237 transitions. [2025-04-14 01:44:19,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 677 places, 1669 transitions, 46230 flow [2025-04-14 01:44:21,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 670 places, 1669 transitions, 45948 flow, removed 46 selfloop flow, removed 7 redundant places. [2025-04-14 01:44:21,879 INFO L231 Difference]: Finished difference. Result has 679 places, 1598 transitions, 42437 flow [2025-04-14 01:44:21,880 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=41154, PETRI_DIFFERENCE_MINUEND_PLACES=639, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=42437, PETRI_PLACES=679, PETRI_TRANSITIONS=1598} [2025-04-14 01:44:21,880 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 659 predicate places. [2025-04-14 01:44:21,880 INFO L485 AbstractCegarLoop]: Abstraction has has 679 places, 1598 transitions, 42437 flow [2025-04-14 01:44:21,880 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.75) internal successors, (105), 28 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:44:21,880 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:44:21,880 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:44:21,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2025-04-14 01:44:22,080 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:44:22,081 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:44:22,081 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:44:22,081 INFO L85 PathProgramCache]: Analyzing trace with hash 27330201, now seen corresponding path program 18 times [2025-04-14 01:44:22,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:44:22,081 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952660362] [2025-04-14 01:44:22,081 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:44:22,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:44:22,085 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 3 equivalence classes. [2025-04-14 01:44:22,091 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:44:22,091 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 01:44:22,091 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:44:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:44:22,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:44:22,316 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952660362] [2025-04-14 01:44:22,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952660362] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:44:22,316 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872511340] [2025-04-14 01:44:22,316 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:44:22,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:44:22,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:44:22,318 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:44:22,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2025-04-14 01:44:22,367 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 3 equivalence classes. [2025-04-14 01:44:22,379 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:44:22,379 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 01:44:22,379 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:44:22,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-04-14 01:44:22,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:44:22,486 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:44:22,487 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 71 [2025-04-14 01:44:22,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:44:22,551 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:44:22,706 INFO L325 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-04-14 01:44:22,707 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2025-04-14 01:44:22,748 INFO L325 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2025-04-14 01:44:22,748 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2025-04-14 01:44:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:44:22,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872511340] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:44:22,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:44:22,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 20 [2025-04-14 01:44:22,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618920547] [2025-04-14 01:44:22,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:44:22,794 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-04-14 01:44:22,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:44:22,795 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-04-14 01:44:22,795 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2025-04-14 01:44:22,795 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:44:22,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 679 places, 1598 transitions, 42437 flow. Second operand has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 22 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:44:22,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:44:22,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:44:22,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:44:26,783 INFO L116 PetriNetUnfolderBase]: 4894/8723 cut-off events. [2025-04-14 01:44:26,783 INFO L117 PetriNetUnfolderBase]: For 312071/312071 co-relation queries the response was YES. [2025-04-14 01:44:26,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101735 conditions, 8723 events. 4894/8723 cut-off events. For 312071/312071 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 66132 event pairs, 259 based on Foata normal form. 2/8725 useless extension candidates. Maximal degree in co-relation 101537. Up to 8473 conditions per place. [2025-04-14 01:44:26,901 INFO L140 encePairwiseOnDemand]: 8/19 looper letters, 1557 selfloop transitions, 91 changer transitions 8/1656 dead transitions. [2025-04-14 01:44:26,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 696 places, 1656 transitions, 46609 flow [2025-04-14 01:44:26,902 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-04-14 01:44:26,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-04-14 01:44:26,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 136 transitions. [2025-04-14 01:44:26,902 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3767313019390582 [2025-04-14 01:44:26,902 INFO L175 Difference]: Start difference. First operand has 679 places, 1598 transitions, 42437 flow. Second operand 19 states and 136 transitions. [2025-04-14 01:44:26,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 696 places, 1656 transitions, 46609 flow [2025-04-14 01:44:29,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 677 places, 1656 transitions, 46132 flow, removed 159 selfloop flow, removed 19 redundant places. [2025-04-14 01:44:29,950 INFO L231 Difference]: Finished difference. Result has 684 places, 1614 transitions, 42747 flow [2025-04-14 01:44:29,951 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=41964, PETRI_DIFFERENCE_MINUEND_PLACES=659, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=42747, PETRI_PLACES=684, PETRI_TRANSITIONS=1614} [2025-04-14 01:44:29,951 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 664 predicate places. [2025-04-14 01:44:29,951 INFO L485 AbstractCegarLoop]: Abstraction has has 684 places, 1614 transitions, 42747 flow [2025-04-14 01:44:29,951 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.727272727272727) internal successors, (82), 22 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:44:29,951 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:44:29,951 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:44:29,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2025-04-14 01:44:30,152 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:44:30,152 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:44:30,152 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:44:30,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1663895373, now seen corresponding path program 16 times [2025-04-14 01:44:30,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:44:30,153 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503178381] [2025-04-14 01:44:30,153 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:44:30,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:44:30,156 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:44:30,160 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:44:30,160 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:44:30,160 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:44:30,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:44:30,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:44:30,232 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503178381] [2025-04-14 01:44:30,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503178381] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:44:30,233 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521411619] [2025-04-14 01:44:30,233 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 01:44:30,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:44:30,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:44:30,234 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:44:30,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2025-04-14 01:44:30,284 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:44:30,308 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:44:30,308 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 01:44:30,308 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:44:30,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 01:44:30,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:44:30,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:44:30,345 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:44:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:44:30,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521411619] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:44:30,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:44:30,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2025-04-14 01:44:30,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16593671] [2025-04-14 01:44:30,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:44:30,459 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-14 01:44:30,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:44:30,460 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-14 01:44:30,460 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2025-04-14 01:44:30,460 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:44:30,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 684 places, 1614 transitions, 42747 flow. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 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 01:44:30,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:44:30,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:44:30,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:44:35,192 INFO L116 PetriNetUnfolderBase]: 4896/8741 cut-off events. [2025-04-14 01:44:35,192 INFO L117 PetriNetUnfolderBase]: For 319291/319291 co-relation queries the response was YES. [2025-04-14 01:44:35,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102003 conditions, 8741 events. 4896/8741 cut-off events. For 319291/319291 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 66462 event pairs, 1269 based on Foata normal form. 36/8777 useless extension candidates. Maximal degree in co-relation 101801. Up to 7245 conditions per place. [2025-04-14 01:44:35,313 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 1227 selfloop transitions, 457 changer transitions 0/1684 dead transitions. [2025-04-14 01:44:35,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 707 places, 1684 transitions, 46872 flow [2025-04-14 01:44:35,314 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-04-14 01:44:35,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-04-14 01:44:35,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 167 transitions. [2025-04-14 01:44:35,315 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.33805668016194335 [2025-04-14 01:44:35,315 INFO L175 Difference]: Start difference. First operand has 684 places, 1614 transitions, 42747 flow. Second operand 26 states and 167 transitions. [2025-04-14 01:44:35,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 707 places, 1684 transitions, 46872 flow [2025-04-14 01:44:38,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 694 places, 1684 transitions, 46474 flow, removed 132 selfloop flow, removed 13 redundant places. [2025-04-14 01:44:38,173 INFO L231 Difference]: Finished difference. Result has 696 places, 1617 transitions, 43368 flow [2025-04-14 01:44:38,174 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=42268, PETRI_DIFFERENCE_MINUEND_PLACES=669, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=452, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=43368, PETRI_PLACES=696, PETRI_TRANSITIONS=1617} [2025-04-14 01:44:38,174 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 676 predicate places. [2025-04-14 01:44:38,174 INFO L485 AbstractCegarLoop]: Abstraction has has 696 places, 1617 transitions, 43368 flow [2025-04-14 01:44:38,174 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 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 01:44:38,174 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:44:38,175 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:44:38,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2025-04-14 01:44:38,375 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:44:38,375 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:44:38,375 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:44:38,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1308658509, now seen corresponding path program 17 times [2025-04-14 01:44:38,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:44:38,376 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327273654] [2025-04-14 01:44:38,376 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:44:38,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:44:38,380 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:44:38,385 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:44:38,385 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:44:38,385 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:44:38,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:44:38,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:44:38,535 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327273654] [2025-04-14 01:44:38,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327273654] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:44:38,536 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9385451] [2025-04-14 01:44:38,536 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 01:44:38,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:44:38,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:44:38,537 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:44:38,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2025-04-14 01:44:38,587 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:44:38,621 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:44:38,621 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:44:38,622 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:44:38,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 01:44:38,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:44:38,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:44:38,676 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:44:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:44:38,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9385451] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:44:38,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:44:38,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2025-04-14 01:44:38,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306908917] [2025-04-14 01:44:38,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:44:38,889 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 01:44:38,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:44:38,889 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 01:44:38,889 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2025-04-14 01:44:38,889 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:44:38,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 696 places, 1617 transitions, 43368 flow. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 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 01:44:38,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:44:38,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:44:38,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:44:40,955 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-14 01:44:45,632 INFO L116 PetriNetUnfolderBase]: 4907/8771 cut-off events. [2025-04-14 01:44:45,632 INFO L117 PetriNetUnfolderBase]: For 325207/325207 co-relation queries the response was YES. [2025-04-14 01:44:45,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102617 conditions, 8771 events. 4907/8771 cut-off events. For 325207/325207 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 66988 event pairs, 414 based on Foata normal form. 24/8795 useless extension candidates. Maximal degree in co-relation 102417. Up to 2790 conditions per place. [2025-04-14 01:44:45,748 INFO L140 encePairwiseOnDemand]: 12/19 looper letters, 626 selfloop transitions, 1105 changer transitions 0/1731 dead transitions. [2025-04-14 01:44:45,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 721 places, 1731 transitions, 48815 flow [2025-04-14 01:44:45,749 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-04-14 01:44:45,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-04-14 01:44:45,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 182 transitions. [2025-04-14 01:44:45,750 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.35477582846003897 [2025-04-14 01:44:45,750 INFO L175 Difference]: Start difference. First operand has 696 places, 1617 transitions, 43368 flow. Second operand 27 states and 182 transitions. [2025-04-14 01:44:45,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 721 places, 1731 transitions, 48815 flow [2025-04-14 01:44:48,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 705 places, 1731 transitions, 48129 flow, removed 43 selfloop flow, removed 16 redundant places. [2025-04-14 01:44:48,753 INFO L231 Difference]: Finished difference. Result has 709 places, 1631 transitions, 45234 flow [2025-04-14 01:44:48,754 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=42645, PETRI_DIFFERENCE_MINUEND_PLACES=679, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1089, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=45234, PETRI_PLACES=709, PETRI_TRANSITIONS=1631} [2025-04-14 01:44:48,755 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 689 predicate places. [2025-04-14 01:44:48,755 INFO L485 AbstractCegarLoop]: Abstraction has has 709 places, 1631 transitions, 45234 flow [2025-04-14 01:44:48,755 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 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 01:44:48,755 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:44:48,755 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:44:48,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2025-04-14 01:44:48,955 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2025-04-14 01:44:48,956 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:44:48,956 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:44:48,956 INFO L85 PathProgramCache]: Analyzing trace with hash -2072315141, now seen corresponding path program 19 times [2025-04-14 01:44:48,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:44:48,956 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974022088] [2025-04-14 01:44:48,956 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:44:48,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:44:48,961 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-14 01:44:48,966 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:44:48,966 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:44:48,966 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:44:49,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:44:49,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:44:49,427 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974022088] [2025-04-14 01:44:49,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974022088] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:44:49,427 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8124562] [2025-04-14 01:44:49,427 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:44:49,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:44:49,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:44:49,429 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:44:49,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2025-04-14 01:44:49,478 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-14 01:44:49,490 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:44:49,490 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:44:49,490 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:44:49,491 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-04-14 01:44:49,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:44:49,637 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:44:49,637 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 64 [2025-04-14 01:44:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:44:49,701 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:44:49,917 INFO L325 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2025-04-14 01:44:49,917 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2025-04-14 01:44:49,991 INFO L325 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-04-14 01:44:49,991 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2025-04-14 01:44:50,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:44:50,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8124562] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:44:50,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:44:50,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 24 [2025-04-14 01:44:50,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835115510] [2025-04-14 01:44:50,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:44:50,029 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-04-14 01:44:50,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:44:50,029 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-04-14 01:44:50,029 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2025-04-14 01:44:50,029 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:44:50,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 709 places, 1631 transitions, 45234 flow. Second operand has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 26 states have internal predecessors, (99), 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 01:44:50,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:44:50,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:44:50,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:44:54,397 INFO L116 PetriNetUnfolderBase]: 4919/8809 cut-off events. [2025-04-14 01:44:54,398 INFO L117 PetriNetUnfolderBase]: For 338726/338726 co-relation queries the response was YES. [2025-04-14 01:44:54,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105990 conditions, 8809 events. 4919/8809 cut-off events. For 338726/338726 co-relation queries the response was YES. Maximal size of possible extension queue 679. Compared 67318 event pairs, 269 based on Foata normal form. 1/8810 useless extension candidates. Maximal degree in co-relation 105785. Up to 7805 conditions per place. [2025-04-14 01:44:54,532 INFO L140 encePairwiseOnDemand]: 9/19 looper letters, 1523 selfloop transitions, 285 changer transitions 5/1813 dead transitions. [2025-04-14 01:44:54,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 738 places, 1813 transitions, 52051 flow [2025-04-14 01:44:54,533 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-04-14 01:44:54,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2025-04-14 01:44:54,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 210 transitions. [2025-04-14 01:44:54,533 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3684210526315789 [2025-04-14 01:44:54,533 INFO L175 Difference]: Start difference. First operand has 709 places, 1631 transitions, 45234 flow. Second operand 30 states and 210 transitions. [2025-04-14 01:44:54,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 738 places, 1813 transitions, 52051 flow [2025-04-14 01:44:57,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 722 places, 1813 transitions, 51413 flow, removed 26 selfloop flow, removed 16 redundant places. [2025-04-14 01:44:57,866 INFO L231 Difference]: Finished difference. Result has 727 places, 1643 transitions, 45664 flow [2025-04-14 01:44:57,866 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=44632, PETRI_DIFFERENCE_MINUEND_PLACES=693, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=45664, PETRI_PLACES=727, PETRI_TRANSITIONS=1643} [2025-04-14 01:44:57,867 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 707 predicate places. [2025-04-14 01:44:57,867 INFO L485 AbstractCegarLoop]: Abstraction has has 727 places, 1643 transitions, 45664 flow [2025-04-14 01:44:57,867 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 26 states have internal predecessors, (99), 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 01:44:57,867 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:44:57,867 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:44:57,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2025-04-14 01:44:58,067 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2025-04-14 01:44:58,068 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:44:58,068 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:44:58,068 INFO L85 PathProgramCache]: Analyzing trace with hash 2139535265, now seen corresponding path program 20 times [2025-04-14 01:44:58,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:44:58,068 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490779302] [2025-04-14 01:44:58,068 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:44:58,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:44:58,073 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:44:58,083 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:44:58,083 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:44:58,083 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:44:58,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:44:58,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:44:58,703 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490779302] [2025-04-14 01:44:58,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490779302] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:44:58,703 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161806740] [2025-04-14 01:44:58,703 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:44:58,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:44:58,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:44:58,705 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:44:58,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2025-04-14 01:44:58,757 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:44:58,770 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:44:58,770 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:44:58,770 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:44:58,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-04-14 01:44:58,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:44:58,946 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:44:58,946 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 71 [2025-04-14 01:44:59,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:44:59,028 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:44:59,242 INFO L325 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-04-14 01:44:59,242 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2025-04-14 01:44:59,288 INFO L325 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2025-04-14 01:44:59,288 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2025-04-14 01:44:59,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:44:59,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161806740] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:44:59,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:44:59,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 25 [2025-04-14 01:44:59,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133498123] [2025-04-14 01:44:59,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:44:59,321 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-04-14 01:44:59,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:44:59,321 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-04-14 01:44:59,321 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2025-04-14 01:44:59,322 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:44:59,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 727 places, 1643 transitions, 45664 flow. Second operand has 27 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:44:59,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:44:59,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:44:59,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:45:04,090 INFO L116 PetriNetUnfolderBase]: 4920/8813 cut-off events. [2025-04-14 01:45:04,090 INFO L117 PetriNetUnfolderBase]: For 340637/340637 co-relation queries the response was YES. [2025-04-14 01:45:04,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106638 conditions, 8813 events. 4920/8813 cut-off events. For 340637/340637 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 67138 event pairs, 272 based on Foata normal form. 3/8816 useless extension candidates. Maximal degree in co-relation 106427. Up to 8517 conditions per place. [2025-04-14 01:45:04,217 INFO L140 encePairwiseOnDemand]: 8/19 looper letters, 1565 selfloop transitions, 130 changer transitions 9/1704 dead transitions. [2025-04-14 01:45:04,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 1704 transitions, 49594 flow [2025-04-14 01:45:04,217 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-04-14 01:45:04,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2025-04-14 01:45:04,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 215 transitions. [2025-04-14 01:45:04,218 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.37719298245614036 [2025-04-14 01:45:04,218 INFO L175 Difference]: Start difference. First operand has 727 places, 1643 transitions, 45664 flow. Second operand 30 states and 215 transitions. [2025-04-14 01:45:04,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 755 places, 1704 transitions, 49594 flow [2025-04-14 01:45:07,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 735 places, 1704 transitions, 49298 flow, removed 51 selfloop flow, removed 20 redundant places. [2025-04-14 01:45:07,527 INFO L231 Difference]: Finished difference. Result has 739 places, 1647 transitions, 45773 flow [2025-04-14 01:45:07,528 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=45368, PETRI_DIFFERENCE_MINUEND_PLACES=706, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=45773, PETRI_PLACES=739, PETRI_TRANSITIONS=1647} [2025-04-14 01:45:07,528 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 719 predicate places. [2025-04-14 01:45:07,528 INFO L485 AbstractCegarLoop]: Abstraction has has 739 places, 1647 transitions, 45773 flow [2025-04-14 01:45:07,528 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 27 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:45:07,528 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:45:07,528 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:45:07,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2025-04-14 01:45:07,728 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:45:07,729 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:45:07,729 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:45:07,729 INFO L85 PathProgramCache]: Analyzing trace with hash 912728217, now seen corresponding path program 18 times [2025-04-14 01:45:07,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:45:07,729 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940647979] [2025-04-14 01:45:07,730 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:45:07,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:45:07,733 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:45:07,737 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:45:07,738 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:45:07,738 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:45:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:45:07,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:45:07,851 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940647979] [2025-04-14 01:45:07,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940647979] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:45:07,852 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509387140] [2025-04-14 01:45:07,852 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 01:45:07,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:45:07,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:45:07,853 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:45:07,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2025-04-14 01:45:07,914 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-14 01:45:07,947 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 01:45:07,947 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 01:45:07,947 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:45:07,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 01:45:07,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:45:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:45:08,005 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:45:08,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:45:08,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509387140] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:45:08,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:45:08,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2025-04-14 01:45:08,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409716131] [2025-04-14 01:45:08,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:45:08,121 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 01:45:08,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:45:08,121 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 01:45:08,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2025-04-14 01:45:08,122 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 19 [2025-04-14 01:45:08,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 739 places, 1647 transitions, 45773 flow. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 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 01:45:08,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:45:08,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 19 [2025-04-14 01:45:08,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:45:13,360 INFO L116 PetriNetUnfolderBase]: 4962/8913 cut-off events. [2025-04-14 01:45:13,360 INFO L117 PetriNetUnfolderBase]: For 355778/355778 co-relation queries the response was YES. [2025-04-14 01:45:13,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107941 conditions, 8913 events. 4962/8913 cut-off events. For 355778/355778 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 68761 event pairs, 1247 based on Foata normal form. 30/8943 useless extension candidates. Maximal degree in co-relation 107727. Up to 7168 conditions per place. [2025-04-14 01:45:13,497 INFO L140 encePairwiseOnDemand]: 13/19 looper letters, 1234 selfloop transitions, 520 changer transitions 0/1754 dead transitions. [2025-04-14 01:45:13,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 760 places, 1754 transitions, 51140 flow [2025-04-14 01:45:13,498 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-04-14 01:45:13,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-04-14 01:45:13,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 181 transitions. [2025-04-14 01:45:13,498 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.36639676113360325 [2025-04-14 01:45:13,498 INFO L175 Difference]: Start difference. First operand has 739 places, 1647 transitions, 45773 flow. Second operand 26 states and 181 transitions. [2025-04-14 01:45:13,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 760 places, 1754 transitions, 51140 flow [2025-04-14 01:45:17,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 733 places, 1754 transitions, 50854 flow, removed 48 selfloop flow, removed 27 redundant places. [2025-04-14 01:45:17,117 INFO L231 Difference]: Finished difference. Result has 740 places, 1674 transitions, 47818 flow [2025-04-14 01:45:17,118 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=45360, PETRI_DIFFERENCE_MINUEND_PLACES=708, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=493, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=47818, PETRI_PLACES=740, PETRI_TRANSITIONS=1674} [2025-04-14 01:45:17,118 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 720 predicate places. [2025-04-14 01:45:17,118 INFO L485 AbstractCegarLoop]: Abstraction has has 740 places, 1674 transitions, 47818 flow [2025-04-14 01:45:17,118 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 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 01:45:17,118 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:45:17,118 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:45:17,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2025-04-14 01:45:17,319 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2025-04-14 01:45:17,319 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:45:17,319 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:45:17,319 INFO L85 PathProgramCache]: Analyzing trace with hash 3578244, now seen corresponding path program 21 times [2025-04-14 01:45:17,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:45:17,320 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982684667] [2025-04-14 01:45:17,323 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:45:17,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:45:17,327 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-04-14 01:45:17,332 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 01:45:17,332 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:45:17,332 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:45:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-04-14 01:45:17,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:45:17,442 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982684667] [2025-04-14 01:45:17,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982684667] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:45:17,443 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848862649] [2025-04-14 01:45:17,443 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 01:45:17,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:45:17,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:45:17,444 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:45:17,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2025-04-14 01:45:17,496 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-04-14 01:45:17,510 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 01:45:17,510 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 01:45:17,510 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:45:17,511 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-04-14 01:45:17,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:45:17,549 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 01:45:17,914 INFO L325 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2025-04-14 01:45:17,914 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 212 treesize of output 117 [2025-04-14 01:45:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:45:17,949 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:45:18,747 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 298 treesize of output 262 [2025-04-14 01:45:19,025 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-14 01:45:19,026 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 15 new quantified variables, introduced 36 case distinctions, treesize of input 2782 treesize of output 2056 [2025-04-14 01:47:25,599 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 01:48:34,757 WARN L249 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2025-04-14 01:48:34,757 WARN L310 FreeRefinementEngine]: Global settings require throwing the following exception [2025-04-14 01:48:34,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2025-04-14 01:48:34,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2025-04-14 01:48:34,958 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2025-04-14 01:48:34,959 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:275) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:499) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:484) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:99) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:589) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:245) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:318) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:726) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:135) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:223) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:115) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:99) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:305) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:241) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:191) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:223) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:115) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:99) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:305) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:285) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:56) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:234) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:395) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:267) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:325) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:181) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:349) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:331) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:427) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:132) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 69 more [2025-04-14 01:48:34,961 INFO L158 Benchmark]: Toolchain (without parser) took 467646.51ms. Allocated memory was 125.8MB in the beginning and 4.1GB in the end (delta: 4.0GB). Free memory was 91.1MB in the beginning and 2.4GB in the end (delta: -2.3GB). Peak memory consumption was 3.9GB. Max. memory is 8.0GB. [2025-04-14 01:48:34,961 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 142.6MB. Free memory is still 78.3MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-14 01:48:34,961 INFO L158 Benchmark]: CACSL2BoogieTranslator took 217.90ms. Allocated memory is still 125.8MB. Free memory was 91.1MB in the beginning and 76.2MB in the end (delta: 15.0MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2025-04-14 01:48:34,962 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.26ms. Allocated memory is still 125.8MB. Free memory was 76.2MB in the beginning and 74.1MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-14 01:48:34,962 INFO L158 Benchmark]: Boogie Preprocessor took 40.53ms. Allocated memory is still 125.8MB. Free memory was 74.1MB in the beginning and 72.4MB in the end (delta: 1.8MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-14 01:48:34,962 INFO L158 Benchmark]: IcfgBuilder took 535.37ms. Allocated memory is still 125.8MB. Free memory was 72.4MB in the beginning and 25.6MB in the end (delta: 46.8MB). Peak memory consumption was 46.1MB. Max. memory is 8.0GB. [2025-04-14 01:48:34,962 INFO L158 Benchmark]: TraceAbstraction took 466812.14ms. Allocated memory was 125.8MB in the beginning and 4.1GB in the end (delta: 4.0GB). Free memory was 24.9MB in the beginning and 2.4GB in the end (delta: -2.3GB). Peak memory consumption was 3.8GB. Max. memory is 8.0GB. [2025-04-14 01:48:34,963 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 142.6MB. Free memory is still 78.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 217.90ms. Allocated memory is still 125.8MB. Free memory was 91.1MB in the beginning and 76.2MB in the end (delta: 15.0MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 26.26ms. Allocated memory is still 125.8MB. Free memory was 76.2MB in the beginning and 74.1MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 40.53ms. Allocated memory is still 125.8MB. Free memory was 74.1MB in the beginning and 72.4MB in the end (delta: 1.8MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * IcfgBuilder took 535.37ms. Allocated memory is still 125.8MB. Free memory was 72.4MB in the beginning and 25.6MB in the end (delta: 46.8MB). Peak memory consumption was 46.1MB. Max. memory is 8.0GB. * TraceAbstraction took 466812.14ms. Allocated memory was 125.8MB in the beginning and 4.1GB in the end (delta: 4.0GB). Free memory was 24.9MB in the beginning and 2.4GB in the end (delta: -2.3GB). Peak memory consumption was 3.8GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...