./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 798a7b37 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-difference-det.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 74892b4fb04a6fe0e809c110df08d9da57c5c90ea65da5b04a32432686fc90f8 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 15:28:06,496 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 15:28:06,552 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2025-03-04 15:28:06,556 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 15:28:06,558 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 15:28:06,581 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 15:28:06,582 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 15:28:06,582 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 15:28:06,583 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 15:28:06,583 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 15:28:06,583 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 15:28:06,583 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 15:28:06,584 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 15:28:06,584 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 15:28:06,584 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 15:28:06,585 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 15:28:06,585 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-04 15:28:06,585 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 15:28:06,585 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 15:28:06,585 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 15:28:06,585 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 15:28:06,585 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-04 15:28:06,585 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 15:28:06,585 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-04 15:28:06,585 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2025-03-04 15:28:06,585 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-04 15:28:06,585 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 15:28:06,585 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-04 15:28:06,586 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 15:28:06,586 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 15:28:06,586 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 15:28:06,586 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 15:28:06,586 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 15:28:06,586 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 15:28:06,586 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 15:28:06,586 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 15:28:06,586 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 15:28:06,586 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-04 15:28:06,586 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-04 15:28:06,586 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-04 15:28:06,586 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-04 15:28:06,586 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 15:28:06,586 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 15:28:06,586 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 15:28:06,587 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 15:28:06,587 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 -> 74892b4fb04a6fe0e809c110df08d9da57c5c90ea65da5b04a32432686fc90f8 [2025-03-04 15:28:06,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 15:28:06,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 15:28:06,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 15:28:06,817 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 15:28:06,817 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 15:28:06,818 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-difference-det.wvr.c [2025-03-04 15:28:07,985 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5da37efc5/9e04173b7d9742bcaaababef644ae0bb/FLAGf91d622bc [2025-03-04 15:28:08,172 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 15:28:08,176 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-difference-det.wvr.c [2025-03-04 15:28:08,193 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5da37efc5/9e04173b7d9742bcaaababef644ae0bb/FLAGf91d622bc [2025-03-04 15:28:08,550 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5da37efc5/9e04173b7d9742bcaaababef644ae0bb [2025-03-04 15:28:08,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 15:28:08,553 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 15:28:08,554 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 15:28:08,554 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 15:28:08,558 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 15:28:08,558 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 03:28:08" (1/1) ... [2025-03-04 15:28:08,559 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@137ce0fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:28:08, skipping insertion in model container [2025-03-04 15:28:08,559 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 03:28:08" (1/1) ... [2025-03-04 15:28:08,573 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 15:28:08,693 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 15:28:08,701 INFO L200 MainTranslator]: Completed pre-run [2025-03-04 15:28:08,723 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 15:28:08,735 INFO L204 MainTranslator]: Completed translation [2025-03-04 15:28:08,736 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:28:08 WrapperNode [2025-03-04 15:28:08,736 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 15:28:08,737 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-04 15:28:08,737 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-04 15:28:08,737 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-04 15:28:08,742 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:28:08" (1/1) ... [2025-03-04 15:28:08,747 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:28:08" (1/1) ... [2025-03-04 15:28:08,764 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 103 [2025-03-04 15:28:08,764 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-04 15:28:08,764 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-04 15:28:08,765 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-04 15:28:08,765 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-04 15:28:08,773 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:28:08" (1/1) ... [2025-03-04 15:28:08,773 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:28:08" (1/1) ... [2025-03-04 15:28:08,774 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:28:08" (1/1) ... [2025-03-04 15:28:08,790 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]. [2025-03-04 15:28:08,793 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:28:08" (1/1) ... [2025-03-04 15:28:08,793 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:28:08" (1/1) ... [2025-03-04 15:28:08,796 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:28:08" (1/1) ... [2025-03-04 15:28:08,800 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:28:08" (1/1) ... [2025-03-04 15:28:08,803 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:28:08" (1/1) ... [2025-03-04 15:28:08,803 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:28:08" (1/1) ... [2025-03-04 15:28:08,804 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-04 15:28:08,805 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-04 15:28:08,805 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-04 15:28:08,805 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-04 15:28:08,809 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:28:08" (1/1) ... [2025-03-04 15:28:08,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 15:28:08,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:28:08,833 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) [2025-03-04 15:28:08,835 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 [2025-03-04 15:28:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-04 15:28:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-04 15:28:08,852 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-04 15:28:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-04 15:28:08,852 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-04 15:28:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-04 15:28:08,852 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-04 15:28:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-03-04 15:28:08,852 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-03-04 15:28:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-04 15:28:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-04 15:28:08,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-04 15:28:08,854 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-04 15:28:08,915 INFO L256 CfgBuilder]: Building ICFG [2025-03-04 15:28:08,917 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-04 15:28:09,086 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-04 15:28:09,089 INFO L307 CfgBuilder]: Performing block encoding [2025-03-04 15:28:09,193 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-04 15:28:09,193 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-04 15:28:09,193 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 03:28:09 BoogieIcfgContainer [2025-03-04 15:28:09,193 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-04 15:28:09,195 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-04 15:28:09,195 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-04 15:28:09,198 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-04 15:28:09,198 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.03 03:28:08" (1/3) ... [2025-03-04 15:28:09,198 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@432a0f5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 03:28:09, skipping insertion in model container [2025-03-04 15:28:09,199 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:28:08" (2/3) ... [2025-03-04 15:28:09,199 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@432a0f5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 03:28:09, skipping insertion in model container [2025-03-04 15:28:09,199 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 03:28:09" (3/3) ... [2025-03-04 15:28:09,201 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2025-03-04 15:28:09,210 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-04 15:28:09,211 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-difference-det.wvr.c that has 5 procedures, 59 locations, 1 initial locations, 4 loop locations, and 16 error locations. [2025-03-04 15:28:09,211 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-04 15:28:09,276 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-04 15:28:09,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 62 transitions, 152 flow [2025-03-04 15:28:09,341 INFO L124 PetriNetUnfolderBase]: 4/58 cut-off events. [2025-03-04 15:28:09,344 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-04 15:28:09,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 58 events. 4/58 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 180 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2025-03-04 15:28:09,347 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 62 transitions, 152 flow [2025-03-04 15:28:09,351 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 56 transitions, 133 flow [2025-03-04 15:28:09,358 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 15:28:09,369 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;@5cc369c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 15:28:09,369 INFO L334 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2025-03-04 15:28:09,373 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-04 15:28:09,374 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2025-03-04 15:28:09,375 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-04 15:28:09,375 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:28:09,375 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-03-04 15:28:09,376 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2025-03-04 15:28:09,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:28:09,381 INFO L85 PathProgramCache]: Analyzing trace with hash 351199170, now seen corresponding path program 1 times [2025-03-04 15:28:09,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:28:09,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285098270] [2025-03-04 15:28:09,386 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:28:09,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:28:09,437 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-04 15:28:09,445 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-04 15:28:09,445 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:28:09,446 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:28:09,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:28:09,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:28:09,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285098270] [2025-03-04 15:28:09,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285098270] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:28:09,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 15:28:09,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-04 15:28:09,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907670342] [2025-03-04 15:28:09,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:28:09,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 15:28:09,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:28:09,544 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 15:28:09,544 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 15:28:09,546 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2025-03-04 15:28:09,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:28:09,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:28:09,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2025-03-04 15:28:09,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:28:11,835 INFO L124 PetriNetUnfolderBase]: 26633/39271 cut-off events. [2025-03-04 15:28:11,836 INFO L125 PetriNetUnfolderBase]: For 1922/1922 co-relation queries the response was YES. [2025-03-04 15:28:11,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75645 conditions, 39271 events. 26633/39271 cut-off events. For 1922/1922 co-relation queries the response was YES. Maximal size of possible extension queue 1867. Compared 286606 event pairs, 6878 based on Foata normal form. 0/28359 useless extension candidates. Maximal degree in co-relation 71260. Up to 29555 conditions per place. [2025-03-04 15:28:12,140 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 69 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2025-03-04 15:28:12,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 85 transitions, 351 flow [2025-03-04 15:28:12,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 15:28:12,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 15:28:12,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2025-03-04 15:28:12,153 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6881720430107527 [2025-03-04 15:28:12,154 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 133 flow. Second operand 3 states and 128 transitions. [2025-03-04 15:28:12,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 85 transitions, 351 flow [2025-03-04 15:28:12,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 85 transitions, 327 flow, removed 0 selfloop flow, removed 7 redundant places. [2025-03-04 15:28:12,198 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 136 flow [2025-03-04 15:28:12,200 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2025-03-04 15:28:12,202 INFO L279 CegarLoopForPetriNet]: 65 programPoint places, -4 predicate places. [2025-03-04 15:28:12,202 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 136 flow [2025-03-04 15:28:12,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:28:12,203 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:28:12,203 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:28:12,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-04 15:28:12,203 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2025-03-04 15:28:12,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:28:12,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1800000602, now seen corresponding path program 1 times [2025-03-04 15:28:12,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:28:12,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416463308] [2025-03-04 15:28:12,204 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:28:12,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:28:12,210 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-04 15:28:12,214 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-04 15:28:12,214 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:28:12,214 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:28:12,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:28:12,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:28:12,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416463308] [2025-03-04 15:28:12,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416463308] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:28:12,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 15:28:12,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 15:28:12,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340143135] [2025-03-04 15:28:12,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:28:12,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 15:28:12,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:28:12,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 15:28:12,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 15:28:12,291 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2025-03-04 15:28:12,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:28:12,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:28:12,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2025-03-04 15:28:12,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:28:14,657 INFO L124 PetriNetUnfolderBase]: 40657/59833 cut-off events. [2025-03-04 15:28:14,657 INFO L125 PetriNetUnfolderBase]: For 3110/3110 co-relation queries the response was YES. [2025-03-04 15:28:14,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119193 conditions, 59833 events. 40657/59833 cut-off events. For 3110/3110 co-relation queries the response was YES. Maximal size of possible extension queue 2699. Compared 447976 event pairs, 23154 based on Foata normal form. 1026/45720 useless extension candidates. Maximal degree in co-relation 52819. Up to 42823 conditions per place. [2025-03-04 15:28:15,007 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 104 selfloop transitions, 4 changer transitions 0/120 dead transitions. [2025-03-04 15:28:15,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 120 transitions, 490 flow [2025-03-04 15:28:15,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 15:28:15,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 15:28:15,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 174 transitions. [2025-03-04 15:28:15,011 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7016129032258065 [2025-03-04 15:28:15,011 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 136 flow. Second operand 4 states and 174 transitions. [2025-03-04 15:28:15,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 120 transitions, 490 flow [2025-03-04 15:28:15,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 120 transitions, 488 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 15:28:15,016 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 163 flow [2025-03-04 15:28:15,017 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=163, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2025-03-04 15:28:15,017 INFO L279 CegarLoopForPetriNet]: 65 programPoint places, 0 predicate places. [2025-03-04 15:28:15,018 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 163 flow [2025-03-04 15:28:15,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:28:15,018 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:28:15,018 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:28:15,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-04 15:28:15,018 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2025-03-04 15:28:15,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:28:15,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1878390121, now seen corresponding path program 1 times [2025-03-04 15:28:15,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:28:15,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079968037] [2025-03-04 15:28:15,021 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:28:15,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:28:15,028 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-04 15:28:15,038 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-04 15:28:15,039 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:28:15,039 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:28:15,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:28:15,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:28:15,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079968037] [2025-03-04 15:28:15,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079968037] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:28:15,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 15:28:15,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-04 15:28:15,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471429272] [2025-03-04 15:28:15,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:28:15,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 15:28:15,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:28:15,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 15:28:15,096 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 15:28:15,097 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2025-03-04 15:28:15,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:28:15,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:28:15,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2025-03-04 15:28:15,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:28:16,964 INFO L124 PetriNetUnfolderBase]: 34577/51753 cut-off events. [2025-03-04 15:28:16,964 INFO L125 PetriNetUnfolderBase]: For 12378/14106 co-relation queries the response was YES. [2025-03-04 15:28:17,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112209 conditions, 51753 events. 34577/51753 cut-off events. For 12378/14106 co-relation queries the response was YES. Maximal size of possible extension queue 1985. Compared 381316 event pairs, 8936 based on Foata normal form. 0/39824 useless extension candidates. Maximal degree in co-relation 56052. Up to 37724 conditions per place. [2025-03-04 15:28:17,208 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 72 selfloop transitions, 2 changer transitions 1/89 dead transitions. [2025-03-04 15:28:17,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 89 transitions, 405 flow [2025-03-04 15:28:17,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 15:28:17,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 15:28:17,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2025-03-04 15:28:17,211 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2025-03-04 15:28:17,212 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 163 flow. Second operand 3 states and 124 transitions. [2025-03-04 15:28:17,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 89 transitions, 405 flow [2025-03-04 15:28:17,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 89 transitions, 399 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 15:28:17,227 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 176 flow [2025-03-04 15:28:17,227 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2025-03-04 15:28:17,228 INFO L279 CegarLoopForPetriNet]: 65 programPoint places, 2 predicate places. [2025-03-04 15:28:17,228 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 176 flow [2025-03-04 15:28:17,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:28:17,228 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:28:17,228 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:28:17,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-04 15:28:17,228 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2025-03-04 15:28:17,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:28:17,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1645954066, now seen corresponding path program 1 times [2025-03-04 15:28:17,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:28:17,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035733065] [2025-03-04 15:28:17,229 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:28:17,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:28:17,235 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-04 15:28:17,243 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-04 15:28:17,243 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:28:17,243 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:28:17,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:28:17,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:28:17,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035733065] [2025-03-04 15:28:17,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035733065] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:28:17,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 15:28:17,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 15:28:17,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093223871] [2025-03-04 15:28:17,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:28:17,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 15:28:17,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:28:17,266 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 15:28:17,266 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 15:28:17,266 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2025-03-04 15:28:17,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:28:17,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:28:17,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2025-03-04 15:28:17,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:28:19,424 INFO L124 PetriNetUnfolderBase]: 31801/47514 cut-off events. [2025-03-04 15:28:19,424 INFO L125 PetriNetUnfolderBase]: For 12750/13678 co-relation queries the response was YES. [2025-03-04 15:28:19,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108125 conditions, 47514 events. 31801/47514 cut-off events. For 12750/13678 co-relation queries the response was YES. Maximal size of possible extension queue 1807. Compared 349561 event pairs, 19145 based on Foata normal form. 0/38706 useless extension candidates. Maximal degree in co-relation 50342. Up to 29306 conditions per place. [2025-03-04 15:28:19,662 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 79 selfloop transitions, 3 changer transitions 0/96 dead transitions. [2025-03-04 15:28:19,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 96 transitions, 444 flow [2025-03-04 15:28:19,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 15:28:19,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 15:28:19,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 130 transitions. [2025-03-04 15:28:19,664 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6989247311827957 [2025-03-04 15:28:19,664 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 176 flow. Second operand 3 states and 130 transitions. [2025-03-04 15:28:19,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 96 transitions, 444 flow [2025-03-04 15:28:19,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 96 transitions, 441 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 15:28:19,690 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 198 flow [2025-03-04 15:28:19,691 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2025-03-04 15:28:19,692 INFO L279 CegarLoopForPetriNet]: 65 programPoint places, 4 predicate places. [2025-03-04 15:28:19,693 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 198 flow [2025-03-04 15:28:19,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:28:19,693 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:28:19,693 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:28:19,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-04 15:28:19,693 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2025-03-04 15:28:19,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:28:19,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1645954067, now seen corresponding path program 1 times [2025-03-04 15:28:19,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:28:19,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737663410] [2025-03-04 15:28:19,694 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:28:19,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:28:19,699 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-04 15:28:19,705 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-04 15:28:19,705 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:28:19,705 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:28:19,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:28:19,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:28:19,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737663410] [2025-03-04 15:28:19,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737663410] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:28:19,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 15:28:19,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 15:28:19,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688216620] [2025-03-04 15:28:19,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:28:19,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 15:28:19,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:28:19,763 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 15:28:19,763 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-04 15:28:19,763 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2025-03-04 15:28:19,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 198 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:28:19,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:28:19,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2025-03-04 15:28:19,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:28:22,220 INFO L124 PetriNetUnfolderBase]: 37799/56542 cut-off events. [2025-03-04 15:28:22,220 INFO L125 PetriNetUnfolderBase]: For 31716/31850 co-relation queries the response was YES. [2025-03-04 15:28:22,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137236 conditions, 56542 events. 37799/56542 cut-off events. For 31716/31850 co-relation queries the response was YES. Maximal size of possible extension queue 1791. Compared 417582 event pairs, 5739 based on Foata normal form. 1533/51839 useless extension candidates. Maximal degree in co-relation 68035. Up to 24870 conditions per place. [2025-03-04 15:28:22,569 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 107 selfloop transitions, 4 changer transitions 0/125 dead transitions. [2025-03-04 15:28:22,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 125 transitions, 598 flow [2025-03-04 15:28:22,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 15:28:22,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 15:28:22,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 180 transitions. [2025-03-04 15:28:22,571 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7258064516129032 [2025-03-04 15:28:22,571 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 198 flow. Second operand 4 states and 180 transitions. [2025-03-04 15:28:22,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 125 transitions, 598 flow [2025-03-04 15:28:22,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 125 transitions, 588 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 15:28:22,743 INFO L231 Difference]: Finished difference. Result has 72 places, 64 transitions, 226 flow [2025-03-04 15:28:22,743 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=72, PETRI_TRANSITIONS=64} [2025-03-04 15:28:22,744 INFO L279 CegarLoopForPetriNet]: 65 programPoint places, 7 predicate places. [2025-03-04 15:28:22,744 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 64 transitions, 226 flow [2025-03-04 15:28:22,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:28:22,744 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:28:22,744 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:28:22,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-04 15:28:22,744 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2025-03-04 15:28:22,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:28:22,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1150913240, now seen corresponding path program 1 times [2025-03-04 15:28:22,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:28:22,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735051398] [2025-03-04 15:28:22,745 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:28:22,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:28:22,749 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-04 15:28:22,752 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-04 15:28:22,752 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:28:22,753 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:28:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:28:22,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:28:22,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735051398] [2025-03-04 15:28:22,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735051398] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:28:22,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193700913] [2025-03-04 15:28:22,795 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:28:22,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:28:22,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:28:22,797 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) [2025-03-04 15:28:22,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-04 15:28:22,838 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-04 15:28:22,844 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-04 15:28:22,845 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:28:22,845 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:28:22,846 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-04 15:28:22,848 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 15:28:22,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:28:22,886 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 15:28:22,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193700913] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:28:22,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-04 15:28:22,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2025-03-04 15:28:22,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448613721] [2025-03-04 15:28:22,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:28:22,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 15:28:22,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:28:22,887 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 15:28:22,887 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-04 15:28:22,887 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2025-03-04 15:28:22,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 64 transitions, 226 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:28:22,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:28:22,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2025-03-04 15:28:22,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:28:26,174 INFO L124 PetriNetUnfolderBase]: 47163/70162 cut-off events. [2025-03-04 15:28:26,175 INFO L125 PetriNetUnfolderBase]: For 58110/59311 co-relation queries the response was YES. [2025-03-04 15:28:26,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171539 conditions, 70162 events. 47163/70162 cut-off events. For 58110/59311 co-relation queries the response was YES. Maximal size of possible extension queue 2160. Compared 525203 event pairs, 16808 based on Foata normal form. 2148/64259 useless extension candidates. Maximal degree in co-relation 67411. Up to 34736 conditions per place. [2025-03-04 15:28:26,605 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 80 selfloop transitions, 7 changer transitions 0/101 dead transitions. [2025-03-04 15:28:26,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 101 transitions, 509 flow [2025-03-04 15:28:26,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 15:28:26,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 15:28:26,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 149 transitions. [2025-03-04 15:28:26,607 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6008064516129032 [2025-03-04 15:28:26,607 INFO L175 Difference]: Start difference. First operand has 72 places, 64 transitions, 226 flow. Second operand 4 states and 149 transitions. [2025-03-04 15:28:26,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 101 transitions, 509 flow [2025-03-04 15:28:26,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 101 transitions, 501 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 15:28:26,788 INFO L231 Difference]: Finished difference. Result has 72 places, 66 transitions, 257 flow [2025-03-04 15:28:26,788 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=257, PETRI_PLACES=72, PETRI_TRANSITIONS=66} [2025-03-04 15:28:26,788 INFO L279 CegarLoopForPetriNet]: 65 programPoint places, 7 predicate places. [2025-03-04 15:28:26,788 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 66 transitions, 257 flow [2025-03-04 15:28:26,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:28:26,789 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:28:26,789 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:28:26,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-04 15:28:26,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-03-04 15:28:26,990 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2025-03-04 15:28:26,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:28:26,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1246656077, now seen corresponding path program 1 times [2025-03-04 15:28:26,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:28:26,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054419301] [2025-03-04 15:28:26,990 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:28:26,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:28:26,994 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-04 15:28:26,997 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-04 15:28:26,997 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:28:26,997 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:28:27,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:28:27,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:28:27,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054419301] [2025-03-04 15:28:27,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054419301] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:28:27,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 15:28:27,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 15:28:27,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369333919] [2025-03-04 15:28:27,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:28:27,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 15:28:27,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:28:27,040 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 15:28:27,041 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 15:28:27,046 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2025-03-04 15:28:27,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 66 transitions, 257 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 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) [2025-03-04 15:28:27,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:28:27,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2025-03-04 15:28:27,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:28:31,926 INFO L124 PetriNetUnfolderBase]: 73155/106371 cut-off events. [2025-03-04 15:28:31,927 INFO L125 PetriNetUnfolderBase]: For 102957/105035 co-relation queries the response was YES. [2025-03-04 15:28:32,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274366 conditions, 106371 events. 73155/106371 cut-off events. For 102957/105035 co-relation queries the response was YES. Maximal size of possible extension queue 3162. Compared 801963 event pairs, 40798 based on Foata normal form. 1944/97219 useless extension candidates. Maximal degree in co-relation 109827. Up to 76203 conditions per place. [2025-03-04 15:28:32,505 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 127 selfloop transitions, 4 changer transitions 0/143 dead transitions. [2025-03-04 15:28:32,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 143 transitions, 877 flow [2025-03-04 15:28:32,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 15:28:32,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 15:28:32,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 164 transitions. [2025-03-04 15:28:32,507 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6612903225806451 [2025-03-04 15:28:32,507 INFO L175 Difference]: Start difference. First operand has 72 places, 66 transitions, 257 flow. Second operand 4 states and 164 transitions. [2025-03-04 15:28:32,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 143 transitions, 877 flow [2025-03-04 15:28:32,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 143 transitions, 858 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 15:28:32,804 INFO L231 Difference]: Finished difference. Result has 75 places, 69 transitions, 279 flow [2025-03-04 15:28:32,804 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=279, PETRI_PLACES=75, PETRI_TRANSITIONS=69} [2025-03-04 15:28:32,804 INFO L279 CegarLoopForPetriNet]: 65 programPoint places, 10 predicate places. [2025-03-04 15:28:32,804 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 69 transitions, 279 flow [2025-03-04 15:28:32,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 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) [2025-03-04 15:28:32,805 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:28:32,805 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:28:32,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-04 15:28:32,805 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2025-03-04 15:28:32,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:28:32,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1213906262, now seen corresponding path program 1 times [2025-03-04 15:28:32,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:28:32,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472938997] [2025-03-04 15:28:32,806 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:28:32,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:28:32,809 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-04 15:28:32,811 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-04 15:28:32,811 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:28:32,811 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:28:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:28:32,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:28:32,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472938997] [2025-03-04 15:28:32,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472938997] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:28:32,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 15:28:32,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 15:28:32,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666117323] [2025-03-04 15:28:32,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:28:32,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 15:28:32,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:28:32,848 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 15:28:32,848 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 15:28:32,853 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2025-03-04 15:28:32,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 69 transitions, 279 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:28:32,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:28:32,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2025-03-04 15:28:32,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:28:40,917 INFO L124 PetriNetUnfolderBase]: 107663/160476 cut-off events. [2025-03-04 15:28:40,917 INFO L125 PetriNetUnfolderBase]: For 159437/165945 co-relation queries the response was YES. [2025-03-04 15:28:41,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429757 conditions, 160476 events. 107663/160476 cut-off events. For 159437/165945 co-relation queries the response was YES. Maximal size of possible extension queue 4706. Compared 1320413 event pairs, 64359 based on Foata normal form. 2599/145448 useless extension candidates. Maximal degree in co-relation 144538. Up to 97178 conditions per place.