./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e66d74cf738883d82d8ab680e594f84e8947532df35a185c16ed9746f38b197c --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 19:44:30,459 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 19:44:30,500 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2025-03-17 19:44:30,503 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 19:44:30,503 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 19:44:30,523 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 19:44:30,525 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 19:44:30,525 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 19:44:30,525 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 19:44:30,525 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 19:44:30,526 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 19:44:30,526 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 19:44:30,526 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 19:44:30,526 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 19:44:30,527 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 19:44:30,527 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 19:44:30,527 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 19:44:30,527 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 19:44:30,527 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 19:44:30,527 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 19:44:30,527 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 19:44:30,527 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 19:44:30,527 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 19:44:30,528 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 19:44:30,528 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2025-03-17 19:44:30,528 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 19:44:30,528 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 19:44:30,528 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 19:44:30,528 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 19:44:30,528 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 19:44:30,528 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 19:44:30,529 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 19:44:30,529 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 19:44:30,529 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 19:44:30,529 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 19:44:30,529 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 19:44:30,529 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 19:44:30,529 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 19:44:30,529 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 19:44:30,529 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 19:44:30,529 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 19:44:30,529 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 19:44:30,529 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 19:44:30,530 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 19:44:30,530 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 19:44:30,530 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e66d74cf738883d82d8ab680e594f84e8947532df35a185c16ed9746f38b197c [2025-03-17 19:44:30,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 19:44:30,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 19:44:30,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 19:44:30,768 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 19:44:30,769 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 19:44:30,770 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2025-03-17 19:44:31,911 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81ad7b70e/d6c79b575b57486c85032ced61c90d04/FLAG084785b35 [2025-03-17 19:44:32,147 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 19:44:32,148 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2025-03-17 19:44:32,155 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81ad7b70e/d6c79b575b57486c85032ced61c90d04/FLAG084785b35 [2025-03-17 19:44:32,479 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81ad7b70e/d6c79b575b57486c85032ced61c90d04 [2025-03-17 19:44:32,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 19:44:32,482 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 19:44:32,483 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 19:44:32,483 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 19:44:32,486 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 19:44:32,486 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:44:32" (1/1) ... [2025-03-17 19:44:32,487 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@153a86e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:44:32, skipping insertion in model container [2025-03-17 19:44:32,487 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:44:32" (1/1) ... [2025-03-17 19:44:32,499 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 19:44:32,605 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 19:44:32,612 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 19:44:32,627 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 19:44:32,636 INFO L204 MainTranslator]: Completed translation [2025-03-17 19:44:32,637 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:44:32 WrapperNode [2025-03-17 19:44:32,637 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 19:44:32,639 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 19:44:32,639 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 19:44:32,639 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 19:44:32,643 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:44:32" (1/1) ... [2025-03-17 19:44:32,649 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:44:32" (1/1) ... [2025-03-17 19:44:32,661 INFO L138 Inliner]: procedures = 18, calls = 12, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 71 [2025-03-17 19:44:32,661 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 19:44:32,662 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 19:44:32,662 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 19:44:32,662 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 19:44:32,667 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:44:32" (1/1) ... [2025-03-17 19:44:32,667 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:44:32" (1/1) ... [2025-03-17 19:44:32,672 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:44:32" (1/1) ... [2025-03-17 19:44:32,686 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-17 19:44:32,686 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:44:32" (1/1) ... [2025-03-17 19:44:32,686 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:44:32" (1/1) ... [2025-03-17 19:44:32,689 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:44:32" (1/1) ... [2025-03-17 19:44:32,689 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:44:32" (1/1) ... [2025-03-17 19:44:32,690 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:44:32" (1/1) ... [2025-03-17 19:44:32,690 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:44:32" (1/1) ... [2025-03-17 19:44:32,691 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 19:44:32,692 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 19:44:32,692 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 19:44:32,692 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 19:44:32,692 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:44:32" (1/1) ... [2025-03-17 19:44:32,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 19:44:32,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:44:32,720 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 19:44:32,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 19:44:32,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 19:44:32,742 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 19:44:32,742 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 19:44:32,742 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 19:44:32,742 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 19:44:32,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 19:44:32,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 19:44:32,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 19:44:32,743 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 19:44:32,806 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 19:44:32,807 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 19:44:32,962 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 19:44:32,962 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 19:44:33,074 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 19:44:33,075 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 19:44:33,076 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 07:44:33 BoogieIcfgContainer [2025-03-17 19:44:33,076 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 19:44:33,078 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 19:44:33,079 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 19:44:33,082 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 19:44:33,082 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 07:44:32" (1/3) ... [2025-03-17 19:44:33,082 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bec09ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:44:33, skipping insertion in model container [2025-03-17 19:44:33,082 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:44:32" (2/3) ... [2025-03-17 19:44:33,083 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bec09ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:44:33, skipping insertion in model container [2025-03-17 19:44:33,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 07:44:33" (3/3) ... [2025-03-17 19:44:33,085 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2025-03-17 19:44:33,094 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 19:44:33,095 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-figure1-alt.wvr.c that has 3 procedures, 34 locations, 1 initial locations, 2 loop locations, and 10 error locations. [2025-03-17 19:44:33,096 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 19:44:33,140 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-17 19:44:33,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 35 transitions, 84 flow [2025-03-17 19:44:33,189 INFO L124 PetriNetUnfolderBase]: 2/33 cut-off events. [2025-03-17 19:44:33,194 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 19:44:33,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 2/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 69 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2025-03-17 19:44:33,197 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 35 transitions, 84 flow [2025-03-17 19:44:33,200 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 32 transitions, 76 flow [2025-03-17 19:44:33,208 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 19:44:33,218 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@11f2e67e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 19:44:33,219 INFO L334 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2025-03-17 19:44:33,227 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 19:44:33,228 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2025-03-17 19:44:33,228 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-17 19:44:33,228 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:44:33,230 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-03-17 19:44:33,230 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2025-03-17 19:44:33,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:44:33,234 INFO L85 PathProgramCache]: Analyzing trace with hash 241539496, now seen corresponding path program 1 times [2025-03-17 19:44:33,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:44:33,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696949590] [2025-03-17 19:44:33,241 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:44:33,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:44:33,292 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 19:44:33,305 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 19:44:33,305 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:44:33,305 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:33,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:33,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:44:33,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696949590] [2025-03-17 19:44:33,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696949590] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:44:33,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:44:33,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 19:44:33,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003018999] [2025-03-17 19:44:33,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:44:33,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 19:44:33,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:44:33,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 19:44:33,433 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 19:44:33,435 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-03-17 19:44:33,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:33,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:44:33,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-03-17 19:44:33,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:44:33,600 INFO L124 PetriNetUnfolderBase]: 194/416 cut-off events. [2025-03-17 19:44:33,600 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2025-03-17 19:44:33,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 793 conditions, 416 events. 194/416 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1911 event pairs, 77 based on Foata normal form. 0/318 useless extension candidates. Maximal degree in co-relation 718. Up to 290 conditions per place. [2025-03-17 19:44:33,609 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 29 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2025-03-17 19:44:33,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 41 transitions, 165 flow [2025-03-17 19:44:33,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 19:44:33,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 19:44:33,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2025-03-17 19:44:33,616 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2025-03-17 19:44:33,618 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 76 flow. Second operand 3 states and 70 transitions. [2025-03-17 19:44:33,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 41 transitions, 165 flow [2025-03-17 19:44:33,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 41 transitions, 151 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 19:44:33,626 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 84 flow [2025-03-17 19:44:33,628 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2025-03-17 19:44:33,631 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2025-03-17 19:44:33,631 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 84 flow [2025-03-17 19:44:33,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:33,632 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:44:33,632 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:44:33,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 19:44:33,632 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2025-03-17 19:44:33,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:44:33,633 INFO L85 PathProgramCache]: Analyzing trace with hash 191231276, now seen corresponding path program 1 times [2025-03-17 19:44:33,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:44:33,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083364550] [2025-03-17 19:44:33,633 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:44:33,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:44:33,640 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 19:44:33,650 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 19:44:33,650 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:44:33,650 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:33,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:33,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:44:33,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083364550] [2025-03-17 19:44:33,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083364550] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:44:33,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:44:33,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 19:44:33,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979744126] [2025-03-17 19:44:33,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:44:33,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 19:44:33,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:44:33,714 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 19:44:33,714 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 19:44:33,722 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-03-17 19:44:33,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:33,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:44:33,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-03-17 19:44:33,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:44:33,875 INFO L124 PetriNetUnfolderBase]: 298/579 cut-off events. [2025-03-17 19:44:33,876 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2025-03-17 19:44:33,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1205 conditions, 579 events. 298/579 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2740 event pairs, 127 based on Foata normal form. 18/496 useless extension candidates. Maximal degree in co-relation 552. Up to 422 conditions per place. [2025-03-17 19:44:33,880 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 46 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2025-03-17 19:44:33,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 58 transitions, 240 flow [2025-03-17 19:44:33,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 19:44:33,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 19:44:33,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2025-03-17 19:44:33,881 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2025-03-17 19:44:33,881 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 84 flow. Second operand 4 states and 92 transitions. [2025-03-17 19:44:33,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 58 transitions, 240 flow [2025-03-17 19:44:33,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 58 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 19:44:33,883 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 111 flow [2025-03-17 19:44:33,883 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=111, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2025-03-17 19:44:33,883 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2025-03-17 19:44:33,884 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 111 flow [2025-03-17 19:44:33,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:33,884 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:44:33,884 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:44:33,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 19:44:33,884 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2025-03-17 19:44:33,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:44:33,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1773914242, now seen corresponding path program 1 times [2025-03-17 19:44:33,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:44:33,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761159140] [2025-03-17 19:44:33,885 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:44:33,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:44:33,889 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 19:44:33,897 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 19:44:33,898 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:44:33,898 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:33,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:33,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:44:33,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761159140] [2025-03-17 19:44:33,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761159140] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:44:33,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:44:33,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 19:44:33,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422745395] [2025-03-17 19:44:33,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:44:33,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 19:44:33,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:44:33,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 19:44:33,957 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 19:44:33,957 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-03-17 19:44:33,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 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) [2025-03-17 19:44:33,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:44:33,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-03-17 19:44:33,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:44:34,069 INFO L124 PetriNetUnfolderBase]: 221/499 cut-off events. [2025-03-17 19:44:34,070 INFO L125 PetriNetUnfolderBase]: For 156/160 co-relation queries the response was YES. [2025-03-17 19:44:34,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1143 conditions, 499 events. 221/499 cut-off events. For 156/160 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2500 event pairs, 133 based on Foata normal form. 0/434 useless extension candidates. Maximal degree in co-relation 357. Up to 286 conditions per place. [2025-03-17 19:44:34,073 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 38 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2025-03-17 19:44:34,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 51 transitions, 244 flow [2025-03-17 19:44:34,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 19:44:34,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 19:44:34,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2025-03-17 19:44:34,074 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6952380952380952 [2025-03-17 19:44:34,074 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 111 flow. Second operand 3 states and 73 transitions. [2025-03-17 19:44:34,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 51 transitions, 244 flow [2025-03-17 19:44:34,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 51 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 19:44:34,076 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 132 flow [2025-03-17 19:44:34,076 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2025-03-17 19:44:34,077 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2025-03-17 19:44:34,077 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 132 flow [2025-03-17 19:44:34,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 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) [2025-03-17 19:44:34,077 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:44:34,077 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:44:34,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 19:44:34,077 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2025-03-17 19:44:34,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:44:34,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1527344355, now seen corresponding path program 1 times [2025-03-17 19:44:34,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:44:34,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909108848] [2025-03-17 19:44:34,078 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:44:34,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:44:34,087 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 19:44:34,094 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 19:44:34,094 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:44:34,094 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:34,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:44:34,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909108848] [2025-03-17 19:44:34,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909108848] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:44:34,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:44:34,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 19:44:34,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005754734] [2025-03-17 19:44:34,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:44:34,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 19:44:34,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:44:34,159 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 19:44:34,159 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-17 19:44:34,159 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-03-17 19:44:34,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:34,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:44:34,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-03-17 19:44:34,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:44:34,263 INFO L124 PetriNetUnfolderBase]: 272/593 cut-off events. [2025-03-17 19:44:34,263 INFO L125 PetriNetUnfolderBase]: For 475/477 co-relation queries the response was YES. [2025-03-17 19:44:34,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1481 conditions, 593 events. 272/593 cut-off events. For 475/477 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2760 event pairs, 56 based on Foata normal form. 25/602 useless extension candidates. Maximal degree in co-relation 681. Up to 237 conditions per place. [2025-03-17 19:44:34,267 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 44 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2025-03-17 19:44:34,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 294 flow [2025-03-17 19:44:34,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 19:44:34,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 19:44:34,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2025-03-17 19:44:34,268 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6857142857142857 [2025-03-17 19:44:34,269 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 132 flow. Second operand 4 states and 96 transitions. [2025-03-17 19:44:34,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 294 flow [2025-03-17 19:44:34,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 58 transitions, 284 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 19:44:34,271 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 160 flow [2025-03-17 19:44:34,271 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2025-03-17 19:44:34,271 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 8 predicate places. [2025-03-17 19:44:34,276 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 160 flow [2025-03-17 19:44:34,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:34,276 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:44:34,276 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:44:34,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 19:44:34,276 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2025-03-17 19:44:34,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:44:34,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1844521035, now seen corresponding path program 1 times [2025-03-17 19:44:34,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:44:34,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126973654] [2025-03-17 19:44:34,277 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:44:34,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:44:34,280 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 19:44:34,283 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 19:44:34,283 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:44:34,283 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:34,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:34,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:44:34,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126973654] [2025-03-17 19:44:34,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126973654] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:44:34,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931207480] [2025-03-17 19:44:34,332 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:44:34,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:44:34,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:44:34,334 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 19:44:34,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 19:44:34,368 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 19:44:34,376 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 19:44:34,376 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:44:34,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:34,378 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-17 19:44:34,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:44:34,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:34,425 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 19:44:34,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931207480] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:44:34,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 19:44:34,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2025-03-17 19:44:34,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549351415] [2025-03-17 19:44:34,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:44:34,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 19:44:34,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:44:34,426 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 19:44:34,426 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-17 19:44:34,426 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-03-17 19:44:34,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:34,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:44:34,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-03-17 19:44:34,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:44:34,510 INFO L124 PetriNetUnfolderBase]: 242/552 cut-off events. [2025-03-17 19:44:34,511 INFO L125 PetriNetUnfolderBase]: For 614/616 co-relation queries the response was YES. [2025-03-17 19:44:34,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1367 conditions, 552 events. 242/552 cut-off events. For 614/616 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2658 event pairs, 202 based on Foata normal form. 24/557 useless extension candidates. Maximal degree in co-relation 632. Up to 430 conditions per place. [2025-03-17 19:44:34,515 INFO L140 encePairwiseOnDemand]: 33/35 looper letters, 26 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2025-03-17 19:44:34,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 37 transitions, 196 flow [2025-03-17 19:44:34,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 19:44:34,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 19:44:34,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 57 transitions. [2025-03-17 19:44:34,519 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2025-03-17 19:44:34,519 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 160 flow. Second operand 3 states and 57 transitions. [2025-03-17 19:44:34,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 37 transitions, 196 flow [2025-03-17 19:44:34,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 37 transitions, 190 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 19:44:34,522 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 138 flow [2025-03-17 19:44:34,522 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2025-03-17 19:44:34,523 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 6 predicate places. [2025-03-17 19:44:34,523 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 138 flow [2025-03-17 19:44:34,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:34,523 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:44:34,523 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:44:34,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-17 19:44:34,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:44:34,725 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2025-03-17 19:44:34,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:44:34,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1100881082, now seen corresponding path program 1 times [2025-03-17 19:44:34,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:44:34,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944701820] [2025-03-17 19:44:34,727 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:44:34,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:44:34,731 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 19:44:34,737 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 19:44:34,737 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:44:34,737 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:34,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:44:34,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944701820] [2025-03-17 19:44:34,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944701820] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:44:34,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:44:34,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 19:44:34,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384674050] [2025-03-17 19:44:34,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:44:34,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 19:44:34,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:44:34,790 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 19:44:34,790 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 19:44:34,793 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-03-17 19:44:34,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:34,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:44:34,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-03-17 19:44:34,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:44:34,912 INFO L124 PetriNetUnfolderBase]: 456/886 cut-off events. [2025-03-17 19:44:34,913 INFO L125 PetriNetUnfolderBase]: For 600/636 co-relation queries the response was YES. [2025-03-17 19:44:34,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2282 conditions, 886 events. 456/886 cut-off events. For 600/636 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 4174 event pairs, 246 based on Foata normal form. 22/882 useless extension candidates. Maximal degree in co-relation 2270. Up to 540 conditions per place. [2025-03-17 19:44:34,917 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 56 selfloop transitions, 4 changer transitions 0/68 dead transitions. [2025-03-17 19:44:34,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 68 transitions, 400 flow [2025-03-17 19:44:34,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 19:44:34,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 19:44:34,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2025-03-17 19:44:34,918 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2025-03-17 19:44:34,918 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 138 flow. Second operand 4 states and 85 transitions. [2025-03-17 19:44:34,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 68 transitions, 400 flow [2025-03-17 19:44:34,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 68 transitions, 399 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 19:44:34,920 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 166 flow [2025-03-17 19:44:34,920 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2025-03-17 19:44:34,921 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 10 predicate places. [2025-03-17 19:44:34,921 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 166 flow [2025-03-17 19:44:34,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:34,921 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:44:34,921 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:44:34,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 19:44:34,921 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2025-03-17 19:44:34,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:44:34,922 INFO L85 PathProgramCache]: Analyzing trace with hash -991000197, now seen corresponding path program 1 times [2025-03-17 19:44:34,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:44:34,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88277379] [2025-03-17 19:44:34,922 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:44:34,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:44:34,926 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 19:44:34,928 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 19:44:34,928 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:44:34,928 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:34,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:34,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:44:34,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88277379] [2025-03-17 19:44:34,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88277379] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:44:34,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:44:34,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 19:44:34,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544061343] [2025-03-17 19:44:34,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:44:34,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 19:44:34,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:44:34,972 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 19:44:34,972 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 19:44:34,978 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-03-17 19:44:34,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:34,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:44:34,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-03-17 19:44:34,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:44:35,061 INFO L124 PetriNetUnfolderBase]: 396/862 cut-off events. [2025-03-17 19:44:35,061 INFO L125 PetriNetUnfolderBase]: For 780/786 co-relation queries the response was YES. [2025-03-17 19:44:35,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2406 conditions, 862 events. 396/862 cut-off events. For 780/786 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4356 event pairs, 324 based on Foata normal form. 3/862 useless extension candidates. Maximal degree in co-relation 2392. Up to 682 conditions per place. [2025-03-17 19:44:35,067 INFO L140 encePairwiseOnDemand]: 33/35 looper letters, 30 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2025-03-17 19:44:35,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 39 transitions, 226 flow [2025-03-17 19:44:35,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 19:44:35,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 19:44:35,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2025-03-17 19:44:35,068 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2025-03-17 19:44:35,068 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 166 flow. Second operand 3 states and 52 transitions. [2025-03-17 19:44:35,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 39 transitions, 226 flow [2025-03-17 19:44:35,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 39 transitions, 223 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 19:44:35,070 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 163 flow [2025-03-17 19:44:35,070 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2025-03-17 19:44:35,070 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 10 predicate places. [2025-03-17 19:44:35,070 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 163 flow [2025-03-17 19:44:35,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:35,071 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:44:35,071 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-03-17 19:44:35,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-17 19:44:35,071 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2025-03-17 19:44:35,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:44:35,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1236769009, now seen corresponding path program 1 times [2025-03-17 19:44:35,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:44:35,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432990123] [2025-03-17 19:44:35,071 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:44:35,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:44:35,075 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 19:44:35,078 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 19:44:35,078 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:44:35,078 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:35,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:44:35,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432990123] [2025-03-17 19:44:35,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432990123] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:44:35,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318228258] [2025-03-17 19:44:35,137 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:44:35,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:44:35,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:44:35,140 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 19:44:35,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 19:44:35,169 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 19:44:35,176 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 19:44:35,177 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:44:35,177 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:35,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-17 19:44:35,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:44:35,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:35,209 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 19:44:35,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318228258] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:44:35,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 19:44:35,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2025-03-17 19:44:35,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184437898] [2025-03-17 19:44:35,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:44:35,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 19:44:35,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:44:35,211 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 19:44:35,211 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-17 19:44:35,219 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-03-17 19:44:35,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 163 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:35,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:44:35,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-03-17 19:44:35,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:44:35,404 INFO L124 PetriNetUnfolderBase]: 436/865 cut-off events. [2025-03-17 19:44:35,404 INFO L125 PetriNetUnfolderBase]: For 767/803 co-relation queries the response was YES. [2025-03-17 19:44:35,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2407 conditions, 865 events. 436/865 cut-off events. For 767/803 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4055 event pairs, 59 based on Foata normal form. 26/865 useless extension candidates. Maximal degree in co-relation 2392. Up to 294 conditions per place. [2025-03-17 19:44:35,410 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 74 selfloop transitions, 7 changer transitions 0/88 dead transitions. [2025-03-17 19:44:35,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 88 transitions, 517 flow [2025-03-17 19:44:35,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 19:44:35,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 19:44:35,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2025-03-17 19:44:35,411 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5904761904761905 [2025-03-17 19:44:35,411 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 163 flow. Second operand 6 states and 124 transitions. [2025-03-17 19:44:35,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 88 transitions, 517 flow [2025-03-17 19:44:35,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 88 transitions, 516 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 19:44:35,413 INFO L231 Difference]: Finished difference. Result has 50 places, 38 transitions, 172 flow [2025-03-17 19:44:35,413 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=50, PETRI_TRANSITIONS=38} [2025-03-17 19:44:35,414 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 13 predicate places. [2025-03-17 19:44:35,414 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 38 transitions, 172 flow [2025-03-17 19:44:35,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:35,414 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:44:35,414 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:44:35,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 19:44:35,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-03-17 19:44:35,615 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2025-03-17 19:44:35,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:44:35,615 INFO L85 PathProgramCache]: Analyzing trace with hash -159449102, now seen corresponding path program 1 times [2025-03-17 19:44:35,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:44:35,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235932099] [2025-03-17 19:44:35,615 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:44:35,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:44:35,619 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 19:44:35,622 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 19:44:35,622 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:44:35,622 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:35,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:35,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:44:35,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235932099] [2025-03-17 19:44:35,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235932099] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:44:35,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:44:35,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 19:44:35,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7196966] [2025-03-17 19:44:35,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:44:35,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 19:44:35,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:44:35,658 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 19:44:35,658 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 19:44:35,666 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-03-17 19:44:35,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 38 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:35,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:44:35,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-03-17 19:44:35,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:44:35,737 INFO L124 PetriNetUnfolderBase]: 396/839 cut-off events. [2025-03-17 19:44:35,737 INFO L125 PetriNetUnfolderBase]: For 995/995 co-relation queries the response was YES. [2025-03-17 19:44:35,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2472 conditions, 839 events. 396/839 cut-off events. For 995/995 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 4077 event pairs, 324 based on Foata normal form. 3/839 useless extension candidates. Maximal degree in co-relation 2457. Up to 679 conditions per place. [2025-03-17 19:44:35,742 INFO L140 encePairwiseOnDemand]: 33/35 looper letters, 27 selfloop transitions, 1 changer transitions 3/37 dead transitions. [2025-03-17 19:44:35,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 37 transitions, 230 flow [2025-03-17 19:44:35,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 19:44:35,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 19:44:35,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2025-03-17 19:44:35,743 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2025-03-17 19:44:35,743 INFO L175 Difference]: Start difference. First operand has 50 places, 38 transitions, 172 flow. Second operand 3 states and 51 transitions. [2025-03-17 19:44:35,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 37 transitions, 230 flow [2025-03-17 19:44:35,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 37 transitions, 215 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-03-17 19:44:35,745 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 149 flow [2025-03-17 19:44:35,745 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2025-03-17 19:44:35,746 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 10 predicate places. [2025-03-17 19:44:35,746 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 149 flow [2025-03-17 19:44:35,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:35,746 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:44:35,747 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2025-03-17 19:44:35,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-17 19:44:35,747 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2025-03-17 19:44:35,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:44:35,747 INFO L85 PathProgramCache]: Analyzing trace with hash 314866597, now seen corresponding path program 1 times [2025-03-17 19:44:35,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:44:35,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706200109] [2025-03-17 19:44:35,747 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:44:35,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:44:35,752 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 19:44:35,755 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 19:44:35,756 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:44:35,756 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:35,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:44:35,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706200109] [2025-03-17 19:44:35,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706200109] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:44:35,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947485455] [2025-03-17 19:44:35,805 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:44:35,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:44:35,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:44:35,818 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 19:44:35,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 19:44:35,843 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 19:44:35,850 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 19:44:35,850 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:44:35,850 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:35,851 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-17 19:44:35,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:44:35,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:35,883 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:44:35,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:35,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947485455] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:44:35,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:44:35,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-17 19:44:35,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001166504] [2025-03-17 19:44:35,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:44:35,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-17 19:44:35,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:44:35,926 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-17 19:44:35,926 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-03-17 19:44:35,942 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-03-17 19:44:35,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 149 flow. Second operand has 12 states, 12 states have (on average 11.666666666666666) internal successors, (140), 12 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:35,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:44:35,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-03-17 19:44:35,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:44:36,234 INFO L124 PetriNetUnfolderBase]: 889/1726 cut-off events. [2025-03-17 19:44:36,235 INFO L125 PetriNetUnfolderBase]: For 1950/2026 co-relation queries the response was YES. [2025-03-17 19:44:36,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4818 conditions, 1726 events. 889/1726 cut-off events. For 1950/2026 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 8580 event pairs, 136 based on Foata normal form. 78/1802 useless extension candidates. Maximal degree in co-relation 4803. Up to 606 conditions per place. [2025-03-17 19:44:36,262 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 136 selfloop transitions, 12 changer transitions 0/153 dead transitions. [2025-03-17 19:44:36,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 153 transitions, 940 flow [2025-03-17 19:44:36,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 19:44:36,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 19:44:36,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2025-03-17 19:44:36,264 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6228571428571429 [2025-03-17 19:44:36,264 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 149 flow. Second operand 10 states and 218 transitions. [2025-03-17 19:44:36,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 153 transitions, 940 flow [2025-03-17 19:44:36,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 153 transitions, 939 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 19:44:36,268 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 229 flow [2025-03-17 19:44:36,268 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=229, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2025-03-17 19:44:36,270 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 19 predicate places. [2025-03-17 19:44:36,270 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 229 flow [2025-03-17 19:44:36,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.666666666666666) internal successors, (140), 12 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:36,271 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:44:36,271 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:44:36,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-17 19:44:36,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:44:36,471 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2025-03-17 19:44:36,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:44:36,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1708694876, now seen corresponding path program 1 times [2025-03-17 19:44:36,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:44:36,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312373558] [2025-03-17 19:44:36,472 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:44:36,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:44:36,478 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 19:44:36,483 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 19:44:36,484 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:44:36,484 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:36,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:44:36,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312373558] [2025-03-17 19:44:36,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312373558] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:44:36,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645240824] [2025-03-17 19:44:36,531 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:44:36,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:44:36,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:44:36,536 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 19:44:36,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 19:44:36,561 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 19:44:36,570 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 19:44:36,570 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:44:36,570 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:36,571 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 19:44:36,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:44:36,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:36,596 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:44:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:36,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645240824] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:44:36,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:44:36,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2025-03-17 19:44:36,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595729033] [2025-03-17 19:44:36,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:44:36,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 19:44:36,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:44:36,617 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 19:44:36,617 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-17 19:44:36,617 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-03-17 19:44:36,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 229 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:36,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:44:36,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-03-17 19:44:36,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:44:36,835 INFO L124 PetriNetUnfolderBase]: 1125/2245 cut-off events. [2025-03-17 19:44:36,835 INFO L125 PetriNetUnfolderBase]: For 4061/4157 co-relation queries the response was YES. [2025-03-17 19:44:36,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6907 conditions, 2245 events. 1125/2245 cut-off events. For 4061/4157 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 11824 event pairs, 74 based on Foata normal form. 185/2429 useless extension candidates. Maximal degree in co-relation 6889. Up to 741 conditions per place. [2025-03-17 19:44:36,850 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 82 selfloop transitions, 6 changer transitions 0/94 dead transitions. [2025-03-17 19:44:36,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 94 transitions, 661 flow [2025-03-17 19:44:36,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 19:44:36,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 19:44:36,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2025-03-17 19:44:36,851 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2025-03-17 19:44:36,851 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 229 flow. Second operand 6 states and 129 transitions. [2025-03-17 19:44:36,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 94 transitions, 661 flow [2025-03-17 19:44:36,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 94 transitions, 641 flow, removed 8 selfloop flow, removed 2 redundant places. [2025-03-17 19:44:36,857 INFO L231 Difference]: Finished difference. Result has 60 places, 45 transitions, 263 flow [2025-03-17 19:44:36,857 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=263, PETRI_PLACES=60, PETRI_TRANSITIONS=45} [2025-03-17 19:44:36,858 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 23 predicate places. [2025-03-17 19:44:36,858 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 45 transitions, 263 flow [2025-03-17 19:44:36,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:36,858 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:44:36,858 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:44:36,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-17 19:44:37,058 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:44:37,059 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2025-03-17 19:44:37,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:44:37,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1305061117, now seen corresponding path program 1 times [2025-03-17 19:44:37,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:44:37,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131467968] [2025-03-17 19:44:37,059 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:44:37,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:44:37,063 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-17 19:44:37,067 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-17 19:44:37,067 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:44:37,067 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:37,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:37,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:44:37,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131467968] [2025-03-17 19:44:37,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131467968] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:44:37,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:44:37,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 19:44:37,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364756770] [2025-03-17 19:44:37,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:44:37,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 19:44:37,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:44:37,112 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 19:44:37,112 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-03-17 19:44:37,113 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-03-17 19:44:37,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 45 transitions, 263 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:37,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:44:37,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-03-17 19:44:37,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:44:37,375 INFO L124 PetriNetUnfolderBase]: 1357/2841 cut-off events. [2025-03-17 19:44:37,375 INFO L125 PetriNetUnfolderBase]: For 5583/5655 co-relation queries the response was YES. [2025-03-17 19:44:37,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9055 conditions, 2841 events. 1357/2841 cut-off events. For 5583/5655 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 16247 event pairs, 254 based on Foata normal form. 34/2874 useless extension candidates. Maximal degree in co-relation 9033. Up to 1501 conditions per place. [2025-03-17 19:44:37,392 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 83 selfloop transitions, 8 changer transitions 2/99 dead transitions. [2025-03-17 19:44:37,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 99 transitions, 738 flow [2025-03-17 19:44:37,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 19:44:37,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 19:44:37,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2025-03-17 19:44:37,394 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6171428571428571 [2025-03-17 19:44:37,394 INFO L175 Difference]: Start difference. First operand has 60 places, 45 transitions, 263 flow. Second operand 5 states and 108 transitions. [2025-03-17 19:44:37,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 99 transitions, 738 flow [2025-03-17 19:44:37,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 99 transitions, 731 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-03-17 19:44:37,405 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 331 flow [2025-03-17 19:44:37,405 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=331, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2025-03-17 19:44:37,406 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 27 predicate places. [2025-03-17 19:44:37,407 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 331 flow [2025-03-17 19:44:37,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:37,407 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:44:37,407 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1] [2025-03-17 19:44:37,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-17 19:44:37,407 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2025-03-17 19:44:37,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:44:37,408 INFO L85 PathProgramCache]: Analyzing trace with hash -903600532, now seen corresponding path program 1 times [2025-03-17 19:44:37,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:44:37,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512363243] [2025-03-17 19:44:37,408 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:44:37,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:44:37,412 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 19:44:37,415 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 19:44:37,416 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:44:37,416 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:37,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:44:37,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512363243] [2025-03-17 19:44:37,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512363243] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:44:37,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197694930] [2025-03-17 19:44:37,472 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:44:37,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:44:37,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:44:37,475 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 19:44:37,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 19:44:37,502 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 19:44:37,511 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 19:44:37,512 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:44:37,512 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:37,512 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-17 19:44:37,513 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:44:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:37,554 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:44:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:37,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197694930] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:44:37,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:44:37,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2025-03-17 19:44:37,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886170528] [2025-03-17 19:44:37,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:44:37,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 19:44:37,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:44:37,607 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 19:44:37,607 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2025-03-17 19:44:37,607 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-03-17 19:44:37,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 331 flow. Second operand has 11 states, 11 states have (on average 14.727272727272727) internal successors, (162), 11 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:37,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:44:37,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-03-17 19:44:37,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:44:38,115 INFO L124 PetriNetUnfolderBase]: 2544/5338 cut-off events. [2025-03-17 19:44:38,115 INFO L125 PetriNetUnfolderBase]: For 14401/14617 co-relation queries the response was YES. [2025-03-17 19:44:38,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17641 conditions, 5338 events. 2544/5338 cut-off events. For 14401/14617 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 35839 event pairs, 92 based on Foata normal form. 212/5549 useless extension candidates. Maximal degree in co-relation 17617. Up to 1165 conditions per place. [2025-03-17 19:44:38,144 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 178 selfloop transitions, 28 changer transitions 0/212 dead transitions. [2025-03-17 19:44:38,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 212 transitions, 1586 flow [2025-03-17 19:44:38,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 19:44:38,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-17 19:44:38,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 272 transitions. [2025-03-17 19:44:38,145 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7064935064935065 [2025-03-17 19:44:38,145 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 331 flow. Second operand 11 states and 272 transitions. [2025-03-17 19:44:38,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 212 transitions, 1586 flow [2025-03-17 19:44:38,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 212 transitions, 1577 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-03-17 19:44:38,159 INFO L231 Difference]: Finished difference. Result has 80 places, 67 transitions, 619 flow [2025-03-17 19:44:38,159 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=619, PETRI_PLACES=80, PETRI_TRANSITIONS=67} [2025-03-17 19:44:38,159 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 43 predicate places. [2025-03-17 19:44:38,159 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 67 transitions, 619 flow [2025-03-17 19:44:38,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.727272727272727) internal successors, (162), 11 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:38,159 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:44:38,159 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:44:38,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-17 19:44:38,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-17 19:44:38,364 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2025-03-17 19:44:38,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:44:38,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1814322034, now seen corresponding path program 1 times [2025-03-17 19:44:38,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:44:38,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317248384] [2025-03-17 19:44:38,365 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:44:38,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:44:38,369 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-17 19:44:38,372 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 19:44:38,373 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:44:38,373 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:38,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:38,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:44:38,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317248384] [2025-03-17 19:44:38,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317248384] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:44:38,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761640978] [2025-03-17 19:44:38,417 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:44:38,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:44:38,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:44:38,419 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 19:44:38,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 19:44:38,454 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-17 19:44:38,465 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 19:44:38,465 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:44:38,465 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:38,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-17 19:44:38,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:44:38,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:38,500 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 19:44:38,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761640978] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:44:38,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 19:44:38,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2025-03-17 19:44:38,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914934895] [2025-03-17 19:44:38,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:44:38,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 19:44:38,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:44:38,501 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 19:44:38,501 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-17 19:44:38,509 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-03-17 19:44:38,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 67 transitions, 619 flow. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:38,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:44:38,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-03-17 19:44:38,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:44:38,946 INFO L124 PetriNetUnfolderBase]: 2902/5732 cut-off events. [2025-03-17 19:44:38,946 INFO L125 PetriNetUnfolderBase]: For 19659/19717 co-relation queries the response was YES. [2025-03-17 19:44:38,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20726 conditions, 5732 events. 2902/5732 cut-off events. For 19659/19717 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 37247 event pairs, 499 based on Foata normal form. 233/5731 useless extension candidates. Maximal degree in co-relation 20694. Up to 1789 conditions per place. [2025-03-17 19:44:38,987 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 183 selfloop transitions, 7 changer transitions 0/194 dead transitions. [2025-03-17 19:44:38,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 194 transitions, 2279 flow [2025-03-17 19:44:38,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 19:44:38,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 19:44:38,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2025-03-17 19:44:38,988 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2025-03-17 19:44:38,988 INFO L175 Difference]: Start difference. First operand has 80 places, 67 transitions, 619 flow. Second operand 6 states and 114 transitions. [2025-03-17 19:44:38,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 194 transitions, 2279 flow [2025-03-17 19:44:39,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 194 transitions, 2094 flow, removed 91 selfloop flow, removed 1 redundant places. [2025-03-17 19:44:39,010 INFO L231 Difference]: Finished difference. Result has 83 places, 66 transitions, 573 flow [2025-03-17 19:44:39,010 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=573, PETRI_PLACES=83, PETRI_TRANSITIONS=66} [2025-03-17 19:44:39,011 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 46 predicate places. [2025-03-17 19:44:39,011 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 66 transitions, 573 flow [2025-03-17 19:44:39,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:39,011 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:44:39,011 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:44:39,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-17 19:44:39,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:44:39,212 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2025-03-17 19:44:39,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:44:39,212 INFO L85 PathProgramCache]: Analyzing trace with hash -133618695, now seen corresponding path program 1 times [2025-03-17 19:44:39,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:44:39,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583383423] [2025-03-17 19:44:39,213 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:44:39,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:44:39,219 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-17 19:44:39,222 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 19:44:39,222 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:44:39,222 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:39,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:39,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:44:39,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583383423] [2025-03-17 19:44:39,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583383423] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:44:39,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762824936] [2025-03-17 19:44:39,289 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:44:39,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:44:39,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:44:39,291 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 19:44:39,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 19:44:39,319 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-17 19:44:39,330 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 19:44:39,330 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:44:39,330 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:39,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-17 19:44:39,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:44:39,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:39,356 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:44:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:39,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762824936] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:44:39,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:44:39,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-17 19:44:39,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184871261] [2025-03-17 19:44:39,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:44:39,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-17 19:44:39,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:44:39,393 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-17 19:44:39,393 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-03-17 19:44:39,404 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-03-17 19:44:39,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 66 transitions, 573 flow. Second operand has 12 states, 12 states have (on average 12.833333333333334) internal successors, (154), 12 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:39,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:44:39,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-03-17 19:44:39,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:44:40,198 INFO L124 PetriNetUnfolderBase]: 4592/8805 cut-off events. [2025-03-17 19:44:40,198 INFO L125 PetriNetUnfolderBase]: For 28731/28917 co-relation queries the response was YES. [2025-03-17 19:44:40,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32936 conditions, 8805 events. 4592/8805 cut-off events. For 28731/28917 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 57978 event pairs, 1086 based on Foata normal form. 420/9224 useless extension candidates. Maximal degree in co-relation 32904. Up to 3118 conditions per place. [2025-03-17 19:44:40,257 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 315 selfloop transitions, 13 changer transitions 14/346 dead transitions. [2025-03-17 19:44:40,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 346 transitions, 3884 flow [2025-03-17 19:44:40,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 19:44:40,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 19:44:40,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2025-03-17 19:44:40,259 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5685714285714286 [2025-03-17 19:44:40,259 INFO L175 Difference]: Start difference. First operand has 83 places, 66 transitions, 573 flow. Second operand 10 states and 199 transitions. [2025-03-17 19:44:40,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 346 transitions, 3884 flow [2025-03-17 19:44:40,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 346 transitions, 3854 flow, removed 8 selfloop flow, removed 4 redundant places. [2025-03-17 19:44:40,292 INFO L231 Difference]: Finished difference. Result has 91 places, 73 transitions, 631 flow [2025-03-17 19:44:40,292 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=631, PETRI_PLACES=91, PETRI_TRANSITIONS=73} [2025-03-17 19:44:40,292 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 54 predicate places. [2025-03-17 19:44:40,292 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 73 transitions, 631 flow [2025-03-17 19:44:40,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.833333333333334) internal successors, (154), 12 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:40,293 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:44:40,293 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1] [2025-03-17 19:44:40,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-17 19:44:40,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:44:40,498 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2025-03-17 19:44:40,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:44:40,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1923639960, now seen corresponding path program 2 times [2025-03-17 19:44:40,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:44:40,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564999579] [2025-03-17 19:44:40,499 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 19:44:40,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:44:40,509 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-17 19:44:40,510 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 8 of 28 statements. [2025-03-17 19:44:40,510 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 19:44:40,511 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-03-17 19:44:40,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:44:40,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564999579] [2025-03-17 19:44:40,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564999579] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:44:40,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387547084] [2025-03-17 19:44:40,538 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 19:44:40,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:44:40,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:44:40,540 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 19:44:40,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 19:44:40,564 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-17 19:44:40,569 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 8 of 28 statements. [2025-03-17 19:44:40,569 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 19:44:40,569 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:40,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-17 19:44:40,570 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:44:40,600 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-03-17 19:44:40,601 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:44:40,637 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-03-17 19:44:40,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387547084] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:44:40,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:44:40,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2025-03-17 19:44:40,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416446849] [2025-03-17 19:44:40,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:44:40,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 19:44:40,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:44:40,638 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 19:44:40,638 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 19:44:40,649 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2025-03-17 19:44:40,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 73 transitions, 631 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:40,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:44:40,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2025-03-17 19:44:40,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:44:41,335 INFO L124 PetriNetUnfolderBase]: 5071/9381 cut-off events. [2025-03-17 19:44:41,335 INFO L125 PetriNetUnfolderBase]: For 37776/37851 co-relation queries the response was YES. [2025-03-17 19:44:41,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35110 conditions, 9381 events. 5071/9381 cut-off events. For 37776/37851 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 59167 event pairs, 1334 based on Foata normal form. 376/9757 useless extension candidates. Maximal degree in co-relation 35076. Up to 3419 conditions per place. [2025-03-17 19:44:41,387 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 121 selfloop transitions, 13 changer transitions 0/137 dead transitions. [2025-03-17 19:44:41,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 137 transitions, 1385 flow [2025-03-17 19:44:41,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 19:44:41,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 19:44:41,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2025-03-17 19:44:41,391 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48 [2025-03-17 19:44:41,391 INFO L175 Difference]: Start difference. First operand has 91 places, 73 transitions, 631 flow. Second operand 5 states and 84 transitions. [2025-03-17 19:44:41,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 137 transitions, 1385 flow [2025-03-17 19:44:41,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 137 transitions, 1342 flow, removed 10 selfloop flow, removed 6 redundant places. [2025-03-17 19:44:41,433 INFO L231 Difference]: Finished difference. Result has 89 places, 73 transitions, 638 flow [2025-03-17 19:44:41,433 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=638, PETRI_PLACES=89, PETRI_TRANSITIONS=73} [2025-03-17 19:44:41,433 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 52 predicate places. [2025-03-17 19:44:41,433 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 73 transitions, 638 flow [2025-03-17 19:44:41,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:41,434 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:44:41,434 INFO L206 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1] [2025-03-17 19:44:41,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-17 19:44:41,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-17 19:44:41,638 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2025-03-17 19:44:41,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:44:41,638 INFO L85 PathProgramCache]: Analyzing trace with hash 768164137, now seen corresponding path program 2 times [2025-03-17 19:44:41,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:44:41,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212328080] [2025-03-17 19:44:41,638 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 19:44:41,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:44:41,644 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 45 statements into 2 equivalence classes. [2025-03-17 19:44:41,653 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 45 of 45 statements. [2025-03-17 19:44:41,655 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 19:44:41,656 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:41,853 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:41,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:44:41,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212328080] [2025-03-17 19:44:41,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212328080] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:44:41,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028151970] [2025-03-17 19:44:41,853 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 19:44:41,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:44:41,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:44:41,855 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 19:44:41,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-17 19:44:41,884 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 45 statements into 2 equivalence classes. [2025-03-17 19:44:41,900 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 45 of 45 statements. [2025-03-17 19:44:41,900 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 19:44:41,900 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:41,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-17 19:44:41,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:44:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:41,965 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:44:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:42,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028151970] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:44:42,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:44:42,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2025-03-17 19:44:42,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797729819] [2025-03-17 19:44:42,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:44:42,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-17 19:44:42,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:44:42,132 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-17 19:44:42,132 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2025-03-17 19:44:42,132 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-03-17 19:44:42,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 73 transitions, 638 flow. Second operand has 21 states, 21 states have (on average 14.857142857142858) internal successors, (312), 21 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:42,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:44:42,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-03-17 19:44:42,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:44:44,305 INFO L124 PetriNetUnfolderBase]: 11167/21523 cut-off events. [2025-03-17 19:44:44,305 INFO L125 PetriNetUnfolderBase]: For 131581/131848 co-relation queries the response was YES. [2025-03-17 19:44:44,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81659 conditions, 21523 events. 11167/21523 cut-off events. For 131581/131848 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 153097 event pairs, 298 based on Foata normal form. 624/22144 useless extension candidates. Maximal degree in co-relation 81626. Up to 4339 conditions per place. [2025-03-17 19:44:44,452 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 492 selfloop transitions, 94 changer transitions 0/591 dead transitions. [2025-03-17 19:44:44,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 591 transitions, 4989 flow [2025-03-17 19:44:44,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-17 19:44:44,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-17 19:44:44,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 542 transitions. [2025-03-17 19:44:44,454 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7374149659863946 [2025-03-17 19:44:44,454 INFO L175 Difference]: Start difference. First operand has 89 places, 73 transitions, 638 flow. Second operand 21 states and 542 transitions. [2025-03-17 19:44:44,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 591 transitions, 4989 flow [2025-03-17 19:44:44,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 591 transitions, 4887 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 19:44:44,527 INFO L231 Difference]: Finished difference. Result has 124 places, 139 transitions, 1624 flow [2025-03-17 19:44:44,527 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1624, PETRI_PLACES=124, PETRI_TRANSITIONS=139} [2025-03-17 19:44:44,528 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 87 predicate places. [2025-03-17 19:44:44,528 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 139 transitions, 1624 flow [2025-03-17 19:44:44,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 14.857142857142858) internal successors, (312), 21 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:44,528 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:44:44,528 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:44:44,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-17 19:44:44,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-17 19:44:44,732 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2025-03-17 19:44:44,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:44:44,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1375762741, now seen corresponding path program 2 times [2025-03-17 19:44:44,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:44:44,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102570956] [2025-03-17 19:44:44,733 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 19:44:44,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:44:44,737 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 53 statements into 2 equivalence classes. [2025-03-17 19:44:44,739 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 13 of 53 statements. [2025-03-17 19:44:44,739 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 19:44:44,739 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:44,761 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-17 19:44:44,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:44:44,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102570956] [2025-03-17 19:44:44,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102570956] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:44:44,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080409899] [2025-03-17 19:44:44,762 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 19:44:44,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:44:44,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:44:44,767 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 19:44:44,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-17 19:44:44,797 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 53 statements into 2 equivalence classes. [2025-03-17 19:44:44,804 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 13 of 53 statements. [2025-03-17 19:44:44,804 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 19:44:44,804 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:44,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-17 19:44:44,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:44:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-17 19:44:44,933 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:44:44,983 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-17 19:44:44,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080409899] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:44:44,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:44:44,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2025-03-17 19:44:44,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995674726] [2025-03-17 19:44:44,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:44:44,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 19:44:44,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:44:44,984 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 19:44:44,984 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 19:44:44,994 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-03-17 19:44:44,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 139 transitions, 1624 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 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) [2025-03-17 19:44:44,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:44:44,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-03-17 19:44:44,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:44:47,288 INFO L124 PetriNetUnfolderBase]: 11167/21552 cut-off events. [2025-03-17 19:44:47,288 INFO L125 PetriNetUnfolderBase]: For 113643/113643 co-relation queries the response was YES. [2025-03-17 19:44:47,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85702 conditions, 21552 events. 11167/21552 cut-off events. For 113643/113643 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 155073 event pairs, 1880 based on Foata normal form. 445/21996 useless extension candidates. Maximal degree in co-relation 85650. Up to 7645 conditions per place. [2025-03-17 19:44:47,497 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 246 selfloop transitions, 15 changer transitions 6/271 dead transitions. [2025-03-17 19:44:47,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 271 transitions, 3851 flow [2025-03-17 19:44:47,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 19:44:47,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 19:44:47,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2025-03-17 19:44:47,498 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49142857142857144 [2025-03-17 19:44:47,498 INFO L175 Difference]: Start difference. First operand has 124 places, 139 transitions, 1624 flow. Second operand 5 states and 86 transitions. [2025-03-17 19:44:47,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 271 transitions, 3851 flow [2025-03-17 19:44:47,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 271 transitions, 3405 flow, removed 176 selfloop flow, removed 9 redundant places. [2025-03-17 19:44:47,941 INFO L231 Difference]: Finished difference. Result has 119 places, 138 transitions, 1460 flow [2025-03-17 19:44:47,941 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1408, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1460, PETRI_PLACES=119, PETRI_TRANSITIONS=138} [2025-03-17 19:44:47,942 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 82 predicate places. [2025-03-17 19:44:47,942 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 138 transitions, 1460 flow [2025-03-17 19:44:47,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 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) [2025-03-17 19:44:47,942 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:44:47,942 INFO L206 CegarLoopForPetriNet]: trace histogram [19, 18, 18, 18, 18, 1, 1, 1, 1] [2025-03-17 19:44:47,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-17 19:44:48,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-17 19:44:48,143 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2025-03-17 19:44:48,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:44:48,143 INFO L85 PathProgramCache]: Analyzing trace with hash -54045047, now seen corresponding path program 3 times [2025-03-17 19:44:48,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:44:48,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526781450] [2025-03-17 19:44:48,143 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 19:44:48,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:44:48,149 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 95 statements into 19 equivalence classes. [2025-03-17 19:44:48,178 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) and asserted 95 of 95 statements. [2025-03-17 19:44:48,178 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2025-03-17 19:44:48,178 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:48,600 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:48,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:44:48,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526781450] [2025-03-17 19:44:48,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526781450] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:44:48,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572935669] [2025-03-17 19:44:48,600 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 19:44:48,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:44:48,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:44:48,603 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 19:44:48,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-17 19:44:48,635 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 95 statements into 19 equivalence classes. [2025-03-17 19:44:48,670 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) and asserted 95 of 95 statements. [2025-03-17 19:44:48,670 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2025-03-17 19:44:48,670 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:48,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-03-17 19:44:48,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:44:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:48,778 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:44:49,260 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:49,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572935669] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:44:49,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:44:49,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 39 [2025-03-17 19:44:49,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334493629] [2025-03-17 19:44:49,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:44:49,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-17 19:44:49,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:44:49,261 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-17 19:44:49,262 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2025-03-17 19:44:49,262 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-03-17 19:44:49,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 138 transitions, 1460 flow. Second operand has 41 states, 41 states have (on average 14.926829268292684) internal successors, (612), 41 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:49,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:44:49,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-03-17 19:44:49,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:44:54,855 INFO L124 PetriNetUnfolderBase]: 20198/40546 cut-off events. [2025-03-17 19:44:54,855 INFO L125 PetriNetUnfolderBase]: For 613400/613404 co-relation queries the response was YES. [2025-03-17 19:44:55,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160194 conditions, 40546 events. 20198/40546 cut-off events. For 613400/613404 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 298089 event pairs, 395 based on Foata normal form. 1174/41717 useless extension candidates. Maximal degree in co-relation 160148. Up to 7963 conditions per place. [2025-03-17 19:44:55,129 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 933 selfloop transitions, 330 changer transitions 0/1267 dead transitions. [2025-03-17 19:44:55,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 1267 transitions, 12195 flow [2025-03-17 19:44:55,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-03-17 19:44:55,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2025-03-17 19:44:55,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 1004 transitions. [2025-03-17 19:44:55,131 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6996515679442509 [2025-03-17 19:44:55,131 INFO L175 Difference]: Start difference. First operand has 119 places, 138 transitions, 1460 flow. Second operand 41 states and 1004 transitions. [2025-03-17 19:44:55,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 1267 transitions, 12195 flow [2025-03-17 19:44:55,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 1267 transitions, 11492 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 19:44:55,348 INFO L231 Difference]: Finished difference. Result has 192 places, 374 transitions, 4853 flow [2025-03-17 19:44:55,348 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1440, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=4853, PETRI_PLACES=192, PETRI_TRANSITIONS=374} [2025-03-17 19:44:55,349 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 155 predicate places. [2025-03-17 19:44:55,349 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 374 transitions, 4853 flow [2025-03-17 19:44:55,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 14.926829268292684) internal successors, (612), 41 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:55,349 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:44:55,349 INFO L206 CegarLoopForPetriNet]: trace histogram [39, 38, 38, 38, 38, 1, 1, 1, 1] [2025-03-17 19:44:55,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-17 19:44:55,549 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:44:55,550 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2025-03-17 19:44:55,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:44:55,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1756546743, now seen corresponding path program 4 times [2025-03-17 19:44:55,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:44:55,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693041876] [2025-03-17 19:44:55,551 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 19:44:55,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:44:55,558 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 195 statements into 2 equivalence classes. [2025-03-17 19:44:55,603 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 195 of 195 statements. [2025-03-17 19:44:55,604 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 19:44:55,604 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:57,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:44:57,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693041876] [2025-03-17 19:44:57,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693041876] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:44:57,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319746384] [2025-03-17 19:44:57,178 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 19:44:57,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:44:57,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:44:57,180 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 19:44:57,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-17 19:44:57,218 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 195 statements into 2 equivalence classes. [2025-03-17 19:44:57,263 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 195 of 195 statements. [2025-03-17 19:44:57,263 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 19:44:57,263 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:44:57,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 79 conjuncts are in the unsatisfiable core [2025-03-17 19:44:57,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:44:57,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:57,483 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:44:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:44:59,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319746384] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:44:59,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:44:59,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 79 [2025-03-17 19:44:59,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445058424] [2025-03-17 19:44:59,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:44:59,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2025-03-17 19:44:59,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:44:59,023 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2025-03-17 19:44:59,025 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2025-03-17 19:44:59,026 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-03-17 19:44:59,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 374 transitions, 4853 flow. Second operand has 81 states, 81 states have (on average 14.962962962962964) internal successors, (1212), 81 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:44:59,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:44:59,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-03-17 19:44:59,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:45:25,888 INFO L124 PetriNetUnfolderBase]: 53723/109161 cut-off events. [2025-03-17 19:45:25,888 INFO L125 PetriNetUnfolderBase]: For 5493786/5493790 co-relation queries the response was YES. [2025-03-17 19:45:27,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452291 conditions, 109161 events. 53723/109161 cut-off events. For 5493786/5493790 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 860215 event pairs, 935 based on Foata normal form. 2294/111452 useless extension candidates. Maximal degree in co-relation 452206. Up to 22175 conditions per place. [2025-03-17 19:45:28,134 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 1853 selfloop transitions, 1206 changer transitions 0/3063 dead transitions. [2025-03-17 19:45:28,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 3063 transitions, 33497 flow [2025-03-17 19:45:28,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2025-03-17 19:45:28,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2025-03-17 19:45:28,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 2004 transitions. [2025-03-17 19:45:28,137 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7068783068783069 [2025-03-17 19:45:28,137 INFO L175 Difference]: Start difference. First operand has 192 places, 374 transitions, 4853 flow. Second operand 81 states and 2004 transitions. [2025-03-17 19:45:28,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 3063 transitions, 33497 flow [2025-03-17 19:45:30,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 3063 transitions, 29110 flow, removed 2124 selfloop flow, removed 9 redundant places. [2025-03-17 19:45:30,427 INFO L231 Difference]: Finished difference. Result has 341 places, 1250 transitions, 16629 flow [2025-03-17 19:45:30,427 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4382, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=16629, PETRI_PLACES=341, PETRI_TRANSITIONS=1250} [2025-03-17 19:45:30,427 INFO L279 CegarLoopForPetriNet]: 37 programPoint places, 304 predicate places. [2025-03-17 19:45:30,427 INFO L471 AbstractCegarLoop]: Abstraction has has 341 places, 1250 transitions, 16629 flow [2025-03-17 19:45:30,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 14.962962962962964) internal successors, (1212), 81 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:45:30,428 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:45:30,428 INFO L206 CegarLoopForPetriNet]: trace histogram [79, 78, 78, 78, 78, 1, 1, 1, 1] [2025-03-17 19:45:30,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-17 19:45:30,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:45:30,629 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2025-03-17 19:45:30,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:45:30,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1343758647, now seen corresponding path program 5 times [2025-03-17 19:45:30,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:45:30,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772552701] [2025-03-17 19:45:30,631 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 19:45:30,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:45:30,647 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 395 statements into 79 equivalence classes. [2025-03-17 19:45:30,901 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) and asserted 395 of 395 statements. [2025-03-17 19:45:30,902 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) [2025-03-17 19:45:30,902 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:45:35,637 INFO L134 CoverageAnalysis]: Checked inductivity of 15171 backedges. 0 proven. 15171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:45:35,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:45:35,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772552701] [2025-03-17 19:45:35,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772552701] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:45:35,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965229020] [2025-03-17 19:45:35,637 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 19:45:35,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:45:35,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:45:35,639 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 19:45:35,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-17 19:45:35,726 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 395 statements into 79 equivalence classes. [2025-03-17 19:45:35,909 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) and asserted 395 of 395 statements. [2025-03-17 19:45:35,909 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) [2025-03-17 19:45:35,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:45:35,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 159 conjuncts are in the unsatisfiable core [2025-03-17 19:45:35,922 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:45:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 15171 backedges. 0 proven. 15171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:45:36,242 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:45:41,126 INFO L134 CoverageAnalysis]: Checked inductivity of 15171 backedges. 0 proven. 15171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:45:41,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965229020] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:45:41,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:45:41,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 158 [2025-03-17 19:45:41,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140155450] [2025-03-17 19:45:41,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:45:41,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 160 states [2025-03-17 19:45:41,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:45:41,132 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2025-03-17 19:45:41,137 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12720, Invalid=12720, Unknown=0, NotChecked=0, Total=25440 [2025-03-17 19:45:41,138 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-03-17 19:45:41,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 1250 transitions, 16629 flow. Second operand has 160 states, 160 states have (on average 14.975) internal successors, (2396), 160 states have internal predecessors, (2396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:45:41,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:45:41,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-03-17 19:45:41,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand