./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.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-nonblocking-cntr.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 fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 19:46:07,087 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 19:46:07,146 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2025-03-17 19:46:07,153 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 19:46:07,153 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 19:46:07,176 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 19:46:07,177 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 19:46:07,178 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 19:46:07,178 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 19:46:07,178 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 19:46:07,178 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 19:46:07,179 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 19:46:07,179 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 19:46:07,179 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 19:46:07,179 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 19:46:07,179 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 19:46:07,179 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 19:46:07,179 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 19:46:07,179 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 19:46:07,180 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 19:46:07,180 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 19:46:07,180 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 19:46:07,180 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 19:46:07,180 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 19:46:07,180 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2025-03-17 19:46:07,180 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 19:46:07,180 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 19:46:07,180 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 19:46:07,180 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 19:46:07,180 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 19:46:07,180 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 19:46:07,180 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 19:46:07,180 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 19:46:07,180 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 19:46:07,180 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 19:46:07,180 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 19:46:07,180 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 19:46:07,180 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 19:46:07,180 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 19:46:07,180 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 19:46:07,181 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 19:46:07,181 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 19:46:07,181 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 19:46:07,181 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 19:46:07,181 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 19:46:07,181 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 -> fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea [2025-03-17 19:46:07,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 19:46:07,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 19:46:07,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 19:46:07,405 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 19:46:07,405 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 19:46:07,406 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2025-03-17 19:46:08,634 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fda13d1b/91cc8a10668943b2b64a5d8d64922906/FLAGdc1bd0649 [2025-03-17 19:46:08,866 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 19:46:08,866 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2025-03-17 19:46:08,876 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fda13d1b/91cc8a10668943b2b64a5d8d64922906/FLAGdc1bd0649 [2025-03-17 19:46:08,891 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fda13d1b/91cc8a10668943b2b64a5d8d64922906 [2025-03-17 19:46:08,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 19:46:08,896 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 19:46:08,898 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 19:46:08,898 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 19:46:08,902 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 19:46:08,902 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:46:08" (1/1) ... [2025-03-17 19:46:08,903 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34dfa0db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:46:08, skipping insertion in model container [2025-03-17 19:46:08,903 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:46:08" (1/1) ... [2025-03-17 19:46:08,915 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 19:46:09,041 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 19:46:09,048 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 19:46:09,061 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 19:46:09,073 INFO L204 MainTranslator]: Completed translation [2025-03-17 19:46:09,074 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:46:09 WrapperNode [2025-03-17 19:46:09,075 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 19:46:09,076 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 19:46:09,077 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 19:46:09,077 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 19:46:09,083 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:46:09" (1/1) ... [2025-03-17 19:46:09,089 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:46:09" (1/1) ... [2025-03-17 19:46:09,100 INFO L138 Inliner]: procedures = 20, calls = 15, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 43 [2025-03-17 19:46:09,102 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 19:46:09,102 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 19:46:09,103 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 19:46:09,103 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 19:46:09,107 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:46:09" (1/1) ... [2025-03-17 19:46:09,107 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:46:09" (1/1) ... [2025-03-17 19:46:09,113 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:46:09" (1/1) ... [2025-03-17 19:46:09,125 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 19:46:09,125 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:46:09" (1/1) ... [2025-03-17 19:46:09,125 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:46:09" (1/1) ... [2025-03-17 19:46:09,128 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:46:09" (1/1) ... [2025-03-17 19:46:09,132 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:46:09" (1/1) ... [2025-03-17 19:46:09,133 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:46:09" (1/1) ... [2025-03-17 19:46:09,133 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:46:09" (1/1) ... [2025-03-17 19:46:09,134 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 19:46:09,135 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 19:46:09,135 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 19:46:09,135 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 19:46:09,136 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:46:09" (1/1) ... [2025-03-17 19:46:09,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 19:46:09,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:46:09,162 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 19:46:09,166 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 19:46:09,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 19:46:09,184 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 19:46:09,184 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 19:46:09,184 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 19:46:09,184 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 19:46:09,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 19:46:09,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 19:46:09,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 19:46:09,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 19:46:09,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 19:46:09,185 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 19:46:09,253 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 19:46:09,255 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 19:46:09,427 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 19:46:09,427 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 19:46:09,550 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 19:46:09,550 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 19:46:09,550 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 07:46:09 BoogieIcfgContainer [2025-03-17 19:46:09,550 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 19:46:09,552 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 19:46:09,552 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 19:46:09,556 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 19:46:09,556 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 07:46:08" (1/3) ... [2025-03-17 19:46:09,558 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2daaf89e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:46:09, skipping insertion in model container [2025-03-17 19:46:09,558 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:46:09" (2/3) ... [2025-03-17 19:46:09,559 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2daaf89e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:46:09, skipping insertion in model container [2025-03-17 19:46:09,559 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 07:46:09" (3/3) ... [2025-03-17 19:46:09,560 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2025-03-17 19:46:09,570 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 19:46:09,572 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-nonblocking-cntr.wvr.c that has 3 procedures, 28 locations, 1 initial locations, 2 loop locations, and 8 error locations. [2025-03-17 19:46:09,572 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 19:46:09,617 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-17 19:46:09,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 29 transitions, 72 flow [2025-03-17 19:46:09,669 INFO L124 PetriNetUnfolderBase]: 2/27 cut-off events. [2025-03-17 19:46:09,673 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 19:46:09,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 2/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 63 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2025-03-17 19:46:09,676 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 29 transitions, 72 flow [2025-03-17 19:46:09,679 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 25 transitions, 59 flow [2025-03-17 19:46:09,688 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 19:46:09,698 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;@5c5f044c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 19:46:09,698 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2025-03-17 19:46:09,706 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 19:46:09,706 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2025-03-17 19:46:09,706 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 19:46:09,706 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:46:09,707 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-03-17 19:46:09,707 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2025-03-17 19:46:09,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:46:09,711 INFO L85 PathProgramCache]: Analyzing trace with hash 225101816, now seen corresponding path program 1 times [2025-03-17 19:46:09,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:46:09,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618409568] [2025-03-17 19:46:09,718 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:46:09,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:46:09,765 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 19:46:09,779 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 19:46:09,779 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:46:09,779 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:46:09,874 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 19:46:09,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:46:09,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618409568] [2025-03-17 19:46:09,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618409568] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:46:09,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:46:09,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 19:46:09,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562073460] [2025-03-17 19:46:09,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:46:09,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 19:46:09,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:46:09,905 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 19:46:09,905 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 19:46:09,906 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2025-03-17 19:46:09,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 19:46:09,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:46:09,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2025-03-17 19:46:09,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:46:10,025 INFO L124 PetriNetUnfolderBase]: 143/294 cut-off events. [2025-03-17 19:46:10,026 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2025-03-17 19:46:10,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 294 events. 143/294 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1241 event pairs, 49 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 517. Up to 191 conditions per place. [2025-03-17 19:46:10,029 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 23 selfloop transitions, 2 changer transitions 2/33 dead transitions. [2025-03-17 19:46:10,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 33 transitions, 135 flow [2025-03-17 19:46:10,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 19:46:10,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 19:46:10,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2025-03-17 19:46:10,037 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2025-03-17 19:46:10,038 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 59 flow. Second operand 3 states and 58 transitions. [2025-03-17 19:46:10,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 33 transitions, 135 flow [2025-03-17 19:46:10,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 127 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 19:46:10,043 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 72 flow [2025-03-17 19:46:10,045 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2025-03-17 19:46:10,047 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, -1 predicate places. [2025-03-17 19:46:10,047 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 72 flow [2025-03-17 19:46:10,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 19:46:10,047 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:46:10,047 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:46:10,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 19:46:10,047 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2025-03-17 19:46:10,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:46:10,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1574489244, now seen corresponding path program 1 times [2025-03-17 19:46:10,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:46:10,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314784114] [2025-03-17 19:46:10,048 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:46:10,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:46:10,052 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 19:46:10,056 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 19:46:10,057 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:46:10,057 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:46:10,125 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 19:46:10,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:46:10,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314784114] [2025-03-17 19:46:10,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314784114] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:46:10,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:46:10,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 19:46:10,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845673200] [2025-03-17 19:46:10,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:46:10,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 19:46:10,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:46:10,128 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 19:46:10,128 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 19:46:10,138 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2025-03-17 19:46:10,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:46:10,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:46:10,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2025-03-17 19:46:10,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:46:10,288 INFO L124 PetriNetUnfolderBase]: 243/472 cut-off events. [2025-03-17 19:46:10,288 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2025-03-17 19:46:10,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1042 conditions, 472 events. 243/472 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2197 event pairs, 111 based on Foata normal form. 14/401 useless extension candidates. Maximal degree in co-relation 535. Up to 337 conditions per place. [2025-03-17 19:46:10,294 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 39 selfloop transitions, 3 changer transitions 1/46 dead transitions. [2025-03-17 19:46:10,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 46 transitions, 216 flow [2025-03-17 19:46:10,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 19:46:10,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 19:46:10,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2025-03-17 19:46:10,296 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5603448275862069 [2025-03-17 19:46:10,296 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 72 flow. Second operand 4 states and 65 transitions. [2025-03-17 19:46:10,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 46 transitions, 216 flow [2025-03-17 19:46:10,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 19:46:10,297 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 94 flow [2025-03-17 19:46:10,297 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2025-03-17 19:46:10,298 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2025-03-17 19:46:10,298 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 94 flow [2025-03-17 19:46:10,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:46:10,298 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:46:10,298 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:46:10,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 19:46:10,298 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2025-03-17 19:46:10,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:46:10,300 INFO L85 PathProgramCache]: Analyzing trace with hash -3947982, now seen corresponding path program 1 times [2025-03-17 19:46:10,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:46:10,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104972599] [2025-03-17 19:46:10,302 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:46:10,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:46:10,306 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 19:46:10,309 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 19:46:10,309 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:46:10,309 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:46:10,348 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 19:46:10,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:46:10,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104972599] [2025-03-17 19:46:10,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104972599] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:46:10,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:46:10,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 19:46:10,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077131567] [2025-03-17 19:46:10,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:46:10,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 19:46:10,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:46:10,349 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 19:46:10,349 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 19:46:10,349 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2025-03-17 19:46:10,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 19:46:10,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:46:10,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2025-03-17 19:46:10,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:46:10,400 INFO L124 PetriNetUnfolderBase]: 130/246 cut-off events. [2025-03-17 19:46:10,400 INFO L125 PetriNetUnfolderBase]: For 87/112 co-relation queries the response was YES. [2025-03-17 19:46:10,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 625 conditions, 246 events. 130/246 cut-off events. For 87/112 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1039 event pairs, 101 based on Foata normal form. 9/212 useless extension candidates. Maximal degree in co-relation 418. Up to 224 conditions per place. [2025-03-17 19:46:10,402 INFO L140 encePairwiseOnDemand]: 27/29 looper letters, 18 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2025-03-17 19:46:10,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 26 transitions, 128 flow [2025-03-17 19:46:10,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 19:46:10,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 19:46:10,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2025-03-17 19:46:10,404 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2025-03-17 19:46:10,404 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 94 flow. Second operand 3 states and 42 transitions. [2025-03-17 19:46:10,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 26 transitions, 128 flow [2025-03-17 19:46:10,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 26 transitions, 126 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 19:46:10,405 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 90 flow [2025-03-17 19:46:10,405 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2025-03-17 19:46:10,405 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2025-03-17 19:46:10,405 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 90 flow [2025-03-17 19:46:10,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 19:46:10,406 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:46:10,406 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:46:10,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 19:46:10,406 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2025-03-17 19:46:10,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:46:10,407 INFO L85 PathProgramCache]: Analyzing trace with hash 261647631, now seen corresponding path program 1 times [2025-03-17 19:46:10,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:46:10,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748326028] [2025-03-17 19:46:10,407 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:46:10,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:46:10,412 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 19:46:10,419 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 19:46:10,421 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:46:10,422 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:46:10,469 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 19:46:10,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:46:10,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748326028] [2025-03-17 19:46:10,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748326028] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:46:10,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:46:10,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 19:46:10,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868216870] [2025-03-17 19:46:10,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:46:10,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 19:46:10,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:46:10,470 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 19:46:10,470 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 19:46:10,473 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2025-03-17 19:46:10,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 19:46:10,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:46:10,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2025-03-17 19:46:10,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:46:10,531 INFO L124 PetriNetUnfolderBase]: 180/347 cut-off events. [2025-03-17 19:46:10,531 INFO L125 PetriNetUnfolderBase]: For 111/148 co-relation queries the response was YES. [2025-03-17 19:46:10,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 831 conditions, 347 events. 180/347 cut-off events. For 111/148 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1580 event pairs, 101 based on Foata normal form. 26/322 useless extension candidates. Maximal degree in co-relation 821. Up to 225 conditions per place. [2025-03-17 19:46:10,533 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 29 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2025-03-17 19:46:10,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 38 transitions, 193 flow [2025-03-17 19:46:10,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 19:46:10,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 19:46:10,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2025-03-17 19:46:10,535 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2025-03-17 19:46:10,535 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 90 flow. Second operand 3 states and 53 transitions. [2025-03-17 19:46:10,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 38 transitions, 193 flow [2025-03-17 19:46:10,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 38 transitions, 192 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 19:46:10,536 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 103 flow [2025-03-17 19:46:10,536 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2025-03-17 19:46:10,536 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2025-03-17 19:46:10,536 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 103 flow [2025-03-17 19:46:10,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 19:46:10,536 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:46:10,537 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:46:10,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 19:46:10,537 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2025-03-17 19:46:10,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:46:10,537 INFO L85 PathProgramCache]: Analyzing trace with hash 271417764, now seen corresponding path program 1 times [2025-03-17 19:46:10,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:46:10,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686739650] [2025-03-17 19:46:10,537 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:46:10,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:46:10,541 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 19:46:10,543 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 19:46:10,544 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:46:10,544 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:46:10,561 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 19:46:10,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:46:10,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686739650] [2025-03-17 19:46:10,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686739650] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:46:10,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:46:10,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 19:46:10,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369790380] [2025-03-17 19:46:10,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:46:10,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 19:46:10,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:46:10,563 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 19:46:10,563 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 19:46:10,563 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2025-03-17 19:46:10,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:46:10,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:46:10,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2025-03-17 19:46:10,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:46:10,616 INFO L124 PetriNetUnfolderBase]: 157/301 cut-off events. [2025-03-17 19:46:10,617 INFO L125 PetriNetUnfolderBase]: For 179/216 co-relation queries the response was YES. [2025-03-17 19:46:10,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 301 events. 157/301 cut-off events. For 179/216 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1305 event pairs, 126 based on Foata normal form. 13/281 useless extension candidates. Maximal degree in co-relation 796. Up to 269 conditions per place. [2025-03-17 19:46:10,618 INFO L140 encePairwiseOnDemand]: 27/29 looper letters, 18 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2025-03-17 19:46:10,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 26 transitions, 137 flow [2025-03-17 19:46:10,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 19:46:10,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 19:46:10,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2025-03-17 19:46:10,619 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47126436781609193 [2025-03-17 19:46:10,619 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 103 flow. Second operand 3 states and 41 transitions. [2025-03-17 19:46:10,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 26 transitions, 137 flow [2025-03-17 19:46:10,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 26 transitions, 135 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 19:46:10,621 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 99 flow [2025-03-17 19:46:10,621 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2025-03-17 19:46:10,621 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2025-03-17 19:46:10,621 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 99 flow [2025-03-17 19:46:10,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:46:10,623 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:46:10,623 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:46:10,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 19:46:10,623 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2025-03-17 19:46:10,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:46:10,626 INFO L85 PathProgramCache]: Analyzing trace with hash 271417765, now seen corresponding path program 1 times [2025-03-17 19:46:10,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:46:10,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890539558] [2025-03-17 19:46:10,626 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:46:10,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:46:10,631 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 19:46:10,633 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 19:46:10,635 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:46:10,635 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:46:10,676 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 19:46:10,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:46:10,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890539558] [2025-03-17 19:46:10,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890539558] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:46:10,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432672228] [2025-03-17 19:46:10,676 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:46:10,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:46:10,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:46:10,678 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 19:46:10,679 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 19:46:10,704 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 19:46:10,712 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 19:46:10,712 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:46:10,712 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:46:10,713 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-17 19:46:10,715 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:46:10,750 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 19:46:10,750 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:46:10,776 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 19:46:10,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432672228] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:46:10,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:46:10,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2025-03-17 19:46:10,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860163244] [2025-03-17 19:46:10,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:46:10,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 19:46:10,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:46:10,778 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 19:46:10,779 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-17 19:46:10,779 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2025-03-17 19:46:10,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 99 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 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 19:46:10,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:46:10,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2025-03-17 19:46:10,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:46:10,936 INFO L124 PetriNetUnfolderBase]: 406/1005 cut-off events. [2025-03-17 19:46:10,937 INFO L125 PetriNetUnfolderBase]: For 411/423 co-relation queries the response was YES. [2025-03-17 19:46:10,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2436 conditions, 1005 events. 406/1005 cut-off events. For 411/423 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 5761 event pairs, 37 based on Foata normal form. 17/962 useless extension candidates. Maximal degree in co-relation 2424. Up to 187 conditions per place. [2025-03-17 19:46:10,943 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 61 selfloop transitions, 15 changer transitions 2/85 dead transitions. [2025-03-17 19:46:10,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 85 transitions, 470 flow [2025-03-17 19:46:10,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 19:46:10,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 19:46:10,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2025-03-17 19:46:10,944 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2025-03-17 19:46:10,944 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 99 flow. Second operand 7 states and 132 transitions. [2025-03-17 19:46:10,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 85 transitions, 470 flow [2025-03-17 19:46:10,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 85 transitions, 469 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 19:46:10,947 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 248 flow [2025-03-17 19:46:10,947 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=248, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2025-03-17 19:46:10,948 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2025-03-17 19:46:10,948 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 248 flow [2025-03-17 19:46:10,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 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 19:46:10,948 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:46:10,948 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:46:10,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 19:46:11,148 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 [2025-03-17 19:46:11,149 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2025-03-17 19:46:11,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:46:11,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1759703677, now seen corresponding path program 1 times [2025-03-17 19:46:11,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:46:11,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780079558] [2025-03-17 19:46:11,149 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:46:11,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:46:11,153 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 19:46:11,157 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 19:46:11,157 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:46:11,157 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:46:11,242 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 19:46:11,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:46:11,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780079558] [2025-03-17 19:46:11,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780079558] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:46:11,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170139380] [2025-03-17 19:46:11,242 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:46:11,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:46:11,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:46:11,249 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 19:46:11,250 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 19:46:11,277 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 19:46:11,288 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 19:46:11,288 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:46:11,288 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:46:11,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-17 19:46:11,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:46:11,321 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 19:46:11,321 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:46:11,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:46:11,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170139380] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 19:46:11,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 19:46:11,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 8 [2025-03-17 19:46:11,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666776007] [2025-03-17 19:46:11,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:46:11,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 19:46:11,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:46:11,353 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 19:46:11,353 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2025-03-17 19:46:11,355 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2025-03-17 19:46:11,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 248 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 19:46:11,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:46:11,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2025-03-17 19:46:11,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:46:11,446 INFO L124 PetriNetUnfolderBase]: 358/768 cut-off events. [2025-03-17 19:46:11,446 INFO L125 PetriNetUnfolderBase]: For 1473/1534 co-relation queries the response was YES. [2025-03-17 19:46:11,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2347 conditions, 768 events. 358/768 cut-off events. For 1473/1534 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3931 event pairs, 68 based on Foata normal form. 11/761 useless extension candidates. Maximal degree in co-relation 2329. Up to 510 conditions per place. [2025-03-17 19:46:11,454 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 41 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2025-03-17 19:46:11,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 390 flow [2025-03-17 19:46:11,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 19:46:11,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 19:46:11,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2025-03-17 19:46:11,456 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5086206896551724 [2025-03-17 19:46:11,457 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 248 flow. Second operand 4 states and 59 transitions. [2025-03-17 19:46:11,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 390 flow [2025-03-17 19:46:11,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 52 transitions, 376 flow, removed 7 selfloop flow, removed 0 redundant places. [2025-03-17 19:46:11,463 INFO L231 Difference]: Finished difference. Result has 49 places, 39 transitions, 246 flow [2025-03-17 19:46:11,463 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=246, PETRI_PLACES=49, PETRI_TRANSITIONS=39} [2025-03-17 19:46:11,464 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 19 predicate places. [2025-03-17 19:46:11,464 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 39 transitions, 246 flow [2025-03-17 19:46:11,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 19:46:11,465 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:46:11,465 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:46:11,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-17 19:46:11,666 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,SelfDestructingSolverStorable6 [2025-03-17 19:46:11,667 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2025-03-17 19:46:11,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:46:11,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1751739216, now seen corresponding path program 1 times [2025-03-17 19:46:11,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:46:11,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267883598] [2025-03-17 19:46:11,668 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:46:11,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:46:11,673 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 19:46:11,680 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 19:46:11,680 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:46:11,680 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:46:11,735 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 19:46:11,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:46:11,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267883598] [2025-03-17 19:46:11,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267883598] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:46:11,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374315175] [2025-03-17 19:46:11,736 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:46:11,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:46:11,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:46:11,738 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 19:46:11,739 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 19:46:11,772 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 19:46:11,781 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 19:46:11,782 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:46:11,782 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:46:11,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-17 19:46:11,783 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:46:11,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 19:46:11,815 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 19:46:11,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374315175] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:46:11,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 19:46:11,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2025-03-17 19:46:11,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588137035] [2025-03-17 19:46:11,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:46:11,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 19:46:11,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:46:11,816 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 19:46:11,816 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-03-17 19:46:11,819 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-17 19:46:11,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 246 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 19:46:11,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:46:11,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-17 19:46:11,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:46:11,920 INFO L124 PetriNetUnfolderBase]: 423/788 cut-off events. [2025-03-17 19:46:11,921 INFO L125 PetriNetUnfolderBase]: For 1397/1478 co-relation queries the response was YES. [2025-03-17 19:46:11,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2452 conditions, 788 events. 423/788 cut-off events. For 1397/1478 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3760 event pairs, 145 based on Foata normal form. 38/731 useless extension candidates. Maximal degree in co-relation 2432. Up to 366 conditions per place. [2025-03-17 19:46:11,924 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 30 selfloop transitions, 10 changer transitions 4/50 dead transitions. [2025-03-17 19:46:11,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 50 transitions, 378 flow [2025-03-17 19:46:11,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 19:46:11,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 19:46:11,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 53 transitions. [2025-03-17 19:46:11,926 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45689655172413796 [2025-03-17 19:46:11,926 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 246 flow. Second operand 4 states and 53 transitions. [2025-03-17 19:46:11,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 50 transitions, 378 flow [2025-03-17 19:46:11,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 50 transitions, 360 flow, removed 6 selfloop flow, removed 2 redundant places. [2025-03-17 19:46:11,930 INFO L231 Difference]: Finished difference. Result has 50 places, 34 transitions, 225 flow [2025-03-17 19:46:11,930 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=225, PETRI_PLACES=50, PETRI_TRANSITIONS=34} [2025-03-17 19:46:11,931 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2025-03-17 19:46:11,931 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 34 transitions, 225 flow [2025-03-17 19:46:11,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 19:46:11,931 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:46:11,931 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-03-17 19:46:11,937 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 19:46:12,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:46:12,132 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2025-03-17 19:46:12,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:46:12,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1160524984, now seen corresponding path program 1 times [2025-03-17 19:46:12,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:46:12,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841136469] [2025-03-17 19:46:12,132 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:46:12,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:46:12,135 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 19:46:12,139 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 19:46:12,139 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:46:12,139 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:46:12,193 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 19:46:12,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:46:12,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841136469] [2025-03-17 19:46:12,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841136469] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:46:12,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160957581] [2025-03-17 19:46:12,194 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:46:12,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:46:12,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:46:12,196 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 19:46:12,198 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 19:46:12,223 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 19:46:12,230 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 19:46:12,230 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:46:12,230 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:46:12,231 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-17 19:46:12,232 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:46:12,258 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 19:46:12,258 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 19:46:12,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160957581] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:46:12,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 19:46:12,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2025-03-17 19:46:12,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877370139] [2025-03-17 19:46:12,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:46:12,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 19:46:12,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:46:12,259 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 19:46:12,259 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-17 19:46:12,270 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2025-03-17 19:46:12,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 34 transitions, 225 flow. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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 19:46:12,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:46:12,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2025-03-17 19:46:12,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:46:12,401 INFO L124 PetriNetUnfolderBase]: 362/749 cut-off events. [2025-03-17 19:46:12,401 INFO L125 PetriNetUnfolderBase]: For 1835/1867 co-relation queries the response was YES. [2025-03-17 19:46:12,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2401 conditions, 749 events. 362/749 cut-off events. For 1835/1867 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 3259 event pairs, 4 based on Foata normal form. 44/749 useless extension candidates. Maximal degree in co-relation 2380. Up to 281 conditions per place. [2025-03-17 19:46:12,406 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 58 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2025-03-17 19:46:12,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 67 transitions, 589 flow [2025-03-17 19:46:12,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 19:46:12,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 19:46:12,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 72 transitions. [2025-03-17 19:46:12,411 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2025-03-17 19:46:12,411 INFO L175 Difference]: Start difference. First operand has 50 places, 34 transitions, 225 flow. Second operand 6 states and 72 transitions. [2025-03-17 19:46:12,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 67 transitions, 589 flow [2025-03-17 19:46:12,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 67 transitions, 561 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 19:46:12,417 INFO L231 Difference]: Finished difference. Result has 50 places, 33 transitions, 221 flow [2025-03-17 19:46:12,417 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=221, PETRI_PLACES=50, PETRI_TRANSITIONS=33} [2025-03-17 19:46:12,417 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2025-03-17 19:46:12,417 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 33 transitions, 221 flow [2025-03-17 19:46:12,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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 19:46:12,418 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:46:12,418 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2025-03-17 19:46:12,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-17 19:46:12,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:46:12,618 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2025-03-17 19:46:12,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:46:12,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1616535947, now seen corresponding path program 1 times [2025-03-17 19:46:12,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:46:12,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822879907] [2025-03-17 19:46:12,619 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:46:12,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:46:12,622 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 19:46:12,629 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 19:46:12,629 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:46:12,629 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:46:12,681 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 19:46:12,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:46:12,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822879907] [2025-03-17 19:46:12,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822879907] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:46:12,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773794158] [2025-03-17 19:46:12,682 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:46:12,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:46:12,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:46:12,684 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 19:46:12,686 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 19:46:12,708 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 19:46:12,715 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 19:46:12,715 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:46:12,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:46:12,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-17 19:46:12,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:46:12,741 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 19:46:12,742 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:46:12,782 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 19:46:12,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773794158] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:46:12,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:46:12,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-17 19:46:12,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178169906] [2025-03-17 19:46:12,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:46:12,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-17 19:46:12,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:46:12,784 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-17 19:46:12,785 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-03-17 19:46:12,806 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2025-03-17 19:46:12,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 33 transitions, 221 flow. Second operand has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 states have internal predecessors, (80), 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 19:46:12,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:46:12,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2025-03-17 19:46:12,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:46:13,009 INFO L124 PetriNetUnfolderBase]: 560/1164 cut-off events. [2025-03-17 19:46:13,010 INFO L125 PetriNetUnfolderBase]: For 2661/2689 co-relation queries the response was YES. [2025-03-17 19:46:13,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3790 conditions, 1164 events. 560/1164 cut-off events. For 2661/2689 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 5479 event pairs, 122 based on Foata normal form. 72/1234 useless extension candidates. Maximal degree in co-relation 3769. Up to 356 conditions per place. [2025-03-17 19:46:13,016 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 105 selfloop transitions, 9 changer transitions 0/118 dead transitions. [2025-03-17 19:46:13,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 118 transitions, 1006 flow [2025-03-17 19:46:13,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 19:46:13,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 19:46:13,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2025-03-17 19:46:13,018 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4379310344827586 [2025-03-17 19:46:13,018 INFO L175 Difference]: Start difference. First operand has 50 places, 33 transitions, 221 flow. Second operand 10 states and 127 transitions. [2025-03-17 19:46:13,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 118 transitions, 1006 flow [2025-03-17 19:46:13,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 118 transitions, 991 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-03-17 19:46:13,023 INFO L231 Difference]: Finished difference. Result has 58 places, 39 transitions, 276 flow [2025-03-17 19:46:13,023 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=276, PETRI_PLACES=58, PETRI_TRANSITIONS=39} [2025-03-17 19:46:13,023 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 28 predicate places. [2025-03-17 19:46:13,023 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 39 transitions, 276 flow [2025-03-17 19:46:13,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.666666666666667) internal successors, (80), 12 states have internal predecessors, (80), 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 19:46:13,023 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:46:13,024 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2025-03-17 19:46:13,030 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 19:46:13,224 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,SelfDestructingSolverStorable9 [2025-03-17 19:46:13,224 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2025-03-17 19:46:13,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:46:13,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1814347513, now seen corresponding path program 2 times [2025-03-17 19:46:13,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:46:13,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581535991] [2025-03-17 19:46:13,225 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 19:46:13,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:46:13,229 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-17 19:46:13,233 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 19:46:13,233 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 19:46:13,233 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:46:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:46:13,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:46:13,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581535991] [2025-03-17 19:46:13,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581535991] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:46:13,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557605334] [2025-03-17 19:46:13,296 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 19:46:13,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:46:13,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:46:13,298 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 19:46:13,299 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 19:46:13,323 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-17 19:46:13,332 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 19:46:13,332 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 19:46:13,332 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:46:13,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-17 19:46:13,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:46:13,367 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:46:13,367 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:46:13,436 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:46:13,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557605334] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:46:13,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:46:13,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-17 19:46:13,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861635862] [2025-03-17 19:46:13,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:46:13,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 19:46:13,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:46:13,437 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 19:46:13,437 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-03-17 19:46:13,437 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2025-03-17 19:46:13,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 39 transitions, 276 flow. Second operand has 13 states, 13 states have (on average 10.153846153846153) internal successors, (132), 13 states have internal predecessors, (132), 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 19:46:13,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:46:13,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2025-03-17 19:46:13,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:46:13,741 INFO L124 PetriNetUnfolderBase]: 759/1971 cut-off events. [2025-03-17 19:46:13,742 INFO L125 PetriNetUnfolderBase]: For 7022/7124 co-relation queries the response was YES. [2025-03-17 19:46:13,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6695 conditions, 1971 events. 759/1971 cut-off events. For 7022/7124 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 11710 event pairs, 29 based on Foata normal form. 88/2044 useless extension candidates. Maximal degree in co-relation 6672. Up to 365 conditions per place. [2025-03-17 19:46:13,756 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 96 selfloop transitions, 40 changer transitions 0/146 dead transitions. [2025-03-17 19:46:13,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 146 transitions, 1222 flow [2025-03-17 19:46:13,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-17 19:46:13,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-17 19:46:13,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 210 transitions. [2025-03-17 19:46:13,758 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5570291777188329 [2025-03-17 19:46:13,758 INFO L175 Difference]: Start difference. First operand has 58 places, 39 transitions, 276 flow. Second operand 13 states and 210 transitions. [2025-03-17 19:46:13,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 146 transitions, 1222 flow [2025-03-17 19:46:13,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 146 transitions, 1193 flow, removed 12 selfloop flow, removed 2 redundant places. [2025-03-17 19:46:13,770 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 762 flow [2025-03-17 19:46:13,770 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=762, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2025-03-17 19:46:13,771 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 48 predicate places. [2025-03-17 19:46:13,771 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 762 flow [2025-03-17 19:46:13,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.153846153846153) internal successors, (132), 13 states have internal predecessors, (132), 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 19:46:13,771 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:46:13,771 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1] [2025-03-17 19:46:13,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-17 19:46:13,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:46:13,972 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2025-03-17 19:46:13,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:46:13,972 INFO L85 PathProgramCache]: Analyzing trace with hash -936415071, now seen corresponding path program 2 times [2025-03-17 19:46:13,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:46:13,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648375058] [2025-03-17 19:46:13,972 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 19:46:13,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:46:13,977 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-17 19:46:13,979 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 8 of 28 statements. [2025-03-17 19:46:13,979 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 19:46:13,979 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:46:14,000 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 19:46:14,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:46:14,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648375058] [2025-03-17 19:46:14,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648375058] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:46:14,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691730131] [2025-03-17 19:46:14,001 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 19:46:14,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:46:14,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:46:14,003 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 19:46:14,005 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 19:46:14,032 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-17 19:46:14,038 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 8 of 28 statements. [2025-03-17 19:46:14,038 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 19:46:14,038 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:46:14,040 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-17 19:46:14,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:46:14,077 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 19:46:14,077 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:46:14,106 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 19:46:14,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691730131] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:46:14,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:46:14,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2025-03-17 19:46:14,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491133855] [2025-03-17 19:46:14,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:46:14,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 19:46:14,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:46:14,108 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 19:46:14,108 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 19:46:14,118 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2025-03-17 19:46:14,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 762 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:46:14,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:46:14,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2025-03-17 19:46:14,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:46:14,410 INFO L124 PetriNetUnfolderBase]: 1482/2823 cut-off events. [2025-03-17 19:46:14,411 INFO L125 PetriNetUnfolderBase]: For 12747/12837 co-relation queries the response was YES. [2025-03-17 19:46:14,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10701 conditions, 2823 events. 1482/2823 cut-off events. For 12747/12837 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 14050 event pairs, 230 based on Foata normal form. 126/2949 useless extension candidates. Maximal degree in co-relation 10666. Up to 1240 conditions per place. [2025-03-17 19:46:14,427 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 120 selfloop transitions, 13 changer transitions 0/136 dead transitions. [2025-03-17 19:46:14,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 136 transitions, 1766 flow [2025-03-17 19:46:14,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 19:46:14,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 19:46:14,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2025-03-17 19:46:14,428 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3310344827586207 [2025-03-17 19:46:14,428 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 762 flow. Second operand 5 states and 48 transitions. [2025-03-17 19:46:14,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 136 transitions, 1766 flow [2025-03-17 19:46:14,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 136 transitions, 1515 flow, removed 117 selfloop flow, removed 6 redundant places. [2025-03-17 19:46:14,447 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 671 flow [2025-03-17 19:46:14,447 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=671, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2025-03-17 19:46:14,447 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 46 predicate places. [2025-03-17 19:46:14,447 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 671 flow [2025-03-17 19:46:14,447 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 19:46:14,448 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:46:14,448 INFO L206 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1] [2025-03-17 19:46:14,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-17 19:46:14,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:46:14,652 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2025-03-17 19:46:14,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:46:14,653 INFO L85 PathProgramCache]: Analyzing trace with hash 785965433, now seen corresponding path program 3 times [2025-03-17 19:46:14,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:46:14,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850891541] [2025-03-17 19:46:14,653 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 19:46:14,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:46:14,662 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 55 statements into 11 equivalence classes. [2025-03-17 19:46:14,672 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 55 of 55 statements. [2025-03-17 19:46:14,673 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-17 19:46:14,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:46:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:46:14,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:46:14,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850891541] [2025-03-17 19:46:14,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850891541] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:46:14,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739326049] [2025-03-17 19:46:14,866 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 19:46:14,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:46:14,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:46:14,868 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 19:46:14,870 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 19:46:14,897 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 55 statements into 11 equivalence classes. [2025-03-17 19:46:14,914 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 55 of 55 statements. [2025-03-17 19:46:14,914 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-17 19:46:14,914 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:46:14,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-17 19:46:14,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:46:14,983 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:46:14,983 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:46:15,203 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:46:15,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739326049] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:46:15,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:46:15,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2025-03-17 19:46:15,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460522350] [2025-03-17 19:46:15,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:46:15,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-17 19:46:15,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:46:15,204 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-17 19:46:15,204 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-03-17 19:46:15,205 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2025-03-17 19:46:15,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 671 flow. Second operand has 25 states, 25 states have (on average 10.08) internal successors, (252), 25 states have internal predecessors, (252), 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 19:46:15,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:46:15,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2025-03-17 19:46:15,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:46:15,906 INFO L124 PetriNetUnfolderBase]: 1587/4033 cut-off events. [2025-03-17 19:46:15,906 INFO L125 PetriNetUnfolderBase]: For 34223/34379 co-relation queries the response was YES. [2025-03-17 19:46:15,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14577 conditions, 4033 events. 1587/4033 cut-off events. For 34223/34379 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 22953 event pairs, 31 based on Foata normal form. 184/4188 useless extension candidates. Maximal degree in co-relation 14545. Up to 803 conditions per place. [2025-03-17 19:46:15,939 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 170 selfloop transitions, 144 changer transitions 0/324 dead transitions. [2025-03-17 19:46:15,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 324 transitions, 2977 flow [2025-03-17 19:46:15,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-17 19:46:15,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-03-17 19:46:15,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 414 transitions. [2025-03-17 19:46:15,979 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5710344827586207 [2025-03-17 19:46:15,979 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 671 flow. Second operand 25 states and 414 transitions. [2025-03-17 19:46:15,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 324 transitions, 2977 flow [2025-03-17 19:46:15,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 324 transitions, 2927 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 19:46:16,002 INFO L231 Difference]: Finished difference. Result has 119 places, 180 transitions, 2232 flow [2025-03-17 19:46:16,002 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2232, PETRI_PLACES=119, PETRI_TRANSITIONS=180} [2025-03-17 19:46:16,003 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 89 predicate places. [2025-03-17 19:46:16,003 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 180 transitions, 2232 flow [2025-03-17 19:46:16,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 10.08) internal successors, (252), 25 states have internal predecessors, (252), 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 19:46:16,004 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:46:16,004 INFO L206 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1] [2025-03-17 19:46:16,010 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 19:46:16,204 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,SelfDestructingSolverStorable12 [2025-03-17 19:46:16,205 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2025-03-17 19:46:16,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:46:16,205 INFO L85 PathProgramCache]: Analyzing trace with hash 341771897, now seen corresponding path program 4 times [2025-03-17 19:46:16,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:46:16,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662275584] [2025-03-17 19:46:16,206 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 19:46:16,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:46:16,217 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 115 statements into 2 equivalence classes. [2025-03-17 19:46:16,239 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 115 of 115 statements. [2025-03-17 19:46:16,239 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 19:46:16,239 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:46:16,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:46:16,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:46:16,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662275584] [2025-03-17 19:46:16,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662275584] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:46:16,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306225107] [2025-03-17 19:46:16,723 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 19:46:16,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:46:16,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:46:16,725 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 19:46:16,726 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 19:46:16,757 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 115 statements into 2 equivalence classes. [2025-03-17 19:46:16,786 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 115 of 115 statements. [2025-03-17 19:46:16,787 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 19:46:16,787 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:46:16,788 INFO L256 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-17 19:46:16,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:46:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:46:16,916 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:46:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:46:17,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306225107] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:46:17,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:46:17,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2025-03-17 19:46:17,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084221793] [2025-03-17 19:46:17,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:46:17,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-03-17 19:46:17,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:46:17,591 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-03-17 19:46:17,592 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2025-03-17 19:46:17,592 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2025-03-17 19:46:17,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 180 transitions, 2232 flow. Second operand has 49 states, 49 states have (on average 10.040816326530612) internal successors, (492), 49 states have internal predecessors, (492), 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 19:46:17,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:46:17,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2025-03-17 19:46:17,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:46:19,644 INFO L124 PetriNetUnfolderBase]: 4119/10683 cut-off events. [2025-03-17 19:46:19,645 INFO L125 PetriNetUnfolderBase]: For 274849/275187 co-relation queries the response was YES. [2025-03-17 19:46:19,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40268 conditions, 10683 events. 4119/10683 cut-off events. For 274849/275187 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 66734 event pairs, 57 based on Foata normal form. 376/11026 useless extension candidates. Maximal degree in co-relation 40213. Up to 2433 conditions per place. [2025-03-17 19:46:19,731 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 316 selfloop transitions, 500 changer transitions 0/826 dead transitions. [2025-03-17 19:46:19,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 826 transitions, 9742 flow [2025-03-17 19:46:19,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2025-03-17 19:46:19,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2025-03-17 19:46:19,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 822 transitions. [2025-03-17 19:46:19,736 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5784658691062632 [2025-03-17 19:46:19,736 INFO L175 Difference]: Start difference. First operand has 119 places, 180 transitions, 2232 flow. Second operand 49 states and 822 transitions. [2025-03-17 19:46:19,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 826 transitions, 9742 flow [2025-03-17 19:46:19,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 826 transitions, 7991 flow, removed 852 selfloop flow, removed 5 redundant places. [2025-03-17 19:46:19,884 INFO L231 Difference]: Finished difference. Result has 208 places, 538 transitions, 7092 flow [2025-03-17 19:46:19,884 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1923, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=7092, PETRI_PLACES=208, PETRI_TRANSITIONS=538} [2025-03-17 19:46:19,885 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 178 predicate places. [2025-03-17 19:46:19,885 INFO L471 AbstractCegarLoop]: Abstraction has has 208 places, 538 transitions, 7092 flow [2025-03-17 19:46:19,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 10.040816326530612) internal successors, (492), 49 states have internal predecessors, (492), 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 19:46:19,885 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:46:19,885 INFO L206 CegarLoopForPetriNet]: trace histogram [47, 46, 46, 46, 46, 1, 1, 1, 1] [2025-03-17 19:46:19,893 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 19:46:20,085 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,SelfDestructingSolverStorable13 [2025-03-17 19:46:20,086 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2025-03-17 19:46:20,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:46:20,087 INFO L85 PathProgramCache]: Analyzing trace with hash 306368633, now seen corresponding path program 5 times [2025-03-17 19:46:20,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:46:20,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855506009] [2025-03-17 19:46:20,087 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 19:46:20,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:46:20,096 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 235 statements into 47 equivalence classes. [2025-03-17 19:46:20,224 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) and asserted 235 of 235 statements. [2025-03-17 19:46:20,224 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2025-03-17 19:46:20,224 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:46:22,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:46:22,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:46:22,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855506009] [2025-03-17 19:46:22,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855506009] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:46:22,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006915431] [2025-03-17 19:46:22,022 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 19:46:22,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:46:22,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:46:22,025 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 19:46:22,027 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 19:46:22,061 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 235 statements into 47 equivalence classes. [2025-03-17 19:46:22,153 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) and asserted 235 of 235 statements. [2025-03-17 19:46:22,153 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2025-03-17 19:46:22,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:46:22,155 INFO L256 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-03-17 19:46:22,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:46:22,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:46:22,396 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:46:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:46:24,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006915431] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:46:24,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:46:24,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 94 [2025-03-17 19:46:24,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352633540] [2025-03-17 19:46:24,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:46:24,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2025-03-17 19:46:24,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:46:24,499 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2025-03-17 19:46:24,502 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2025-03-17 19:46:24,503 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2025-03-17 19:46:24,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 538 transitions, 7092 flow. Second operand has 96 states, 96 states have (on average 10.0) internal successors, (960), 96 states have internal predecessors, (960), 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 19:46:24,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:46:24,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2025-03-17 19:46:24,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:46:35,166 INFO L124 PetriNetUnfolderBase]: 12651/33281 cut-off events. [2025-03-17 19:46:35,166 INFO L125 PetriNetUnfolderBase]: For 2190435/2191145 co-relation queries the response was YES. [2025-03-17 19:46:35,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125481 conditions, 33281 events. 12651/33281 cut-off events. For 2190435/2191145 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 240978 event pairs, 177 based on Foata normal form. 760/34040 useless extension candidates. Maximal degree in co-relation 125383. Up to 8011 conditions per place. [2025-03-17 19:46:35,619 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 604 selfloop transitions, 1792 changer transitions 0/2406 dead transitions. [2025-03-17 19:46:35,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 2406 transitions, 31114 flow [2025-03-17 19:46:35,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2025-03-17 19:46:35,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2025-03-17 19:46:35,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 1626 transitions. [2025-03-17 19:46:35,625 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.584051724137931 [2025-03-17 19:46:35,625 INFO L175 Difference]: Start difference. First operand has 208 places, 538 transitions, 7092 flow. Second operand 96 states and 1626 transitions. [2025-03-17 19:46:35,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 2406 transitions, 31114 flow [2025-03-17 19:46:36,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 2406 transitions, 24595 flow, removed 3150 selfloop flow, removed 11 redundant places. [2025-03-17 19:46:36,375 INFO L231 Difference]: Finished difference. Result has 386 places, 1832 transitions, 24462 flow [2025-03-17 19:46:36,376 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6335, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=505, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=24462, PETRI_PLACES=386, PETRI_TRANSITIONS=1832} [2025-03-17 19:46:36,376 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 356 predicate places. [2025-03-17 19:46:36,376 INFO L471 AbstractCegarLoop]: Abstraction has has 386 places, 1832 transitions, 24462 flow [2025-03-17 19:46:36,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 10.0) internal successors, (960), 96 states have internal predecessors, (960), 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 19:46:36,377 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:46:36,377 INFO L206 CegarLoopForPetriNet]: trace histogram [95, 94, 94, 94, 94, 1, 1, 1, 1] [2025-03-17 19:46:36,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-17 19:46:36,577 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,SelfDestructingSolverStorable14 [2025-03-17 19:46:36,578 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2025-03-17 19:46:36,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:46:36,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1013474425, now seen corresponding path program 6 times [2025-03-17 19:46:36,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:46:36,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128330643] [2025-03-17 19:46:36,580 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 19:46:36,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:46:36,597 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 475 statements into 95 equivalence classes. [2025-03-17 19:46:36,912 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) and asserted 475 of 475 statements. [2025-03-17 19:46:36,912 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2025-03-17 19:46:36,912 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:46:42,737 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:46:42,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:46:42,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128330643] [2025-03-17 19:46:42,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128330643] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:46:42,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41472719] [2025-03-17 19:46:42,738 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 19:46:42,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:46:42,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:46:42,740 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 19:46:42,741 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 19:46:42,791 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 475 statements into 95 equivalence classes. [2025-03-17 19:46:42,949 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) and asserted 475 of 475 statements. [2025-03-17 19:46:42,949 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2025-03-17 19:46:42,949 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:46:42,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 97 conjuncts are in the unsatisfiable core [2025-03-17 19:46:42,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:46:43,359 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:46:43,359 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:46:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 22043 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:46:50,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41472719] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:46:50,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:46:50,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 191 [2025-03-17 19:46:50,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603179898] [2025-03-17 19:46:50,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:46:50,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2025-03-17 19:46:50,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:46:50,420 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2025-03-17 19:46:50,427 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2025-03-17 19:46:50,428 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2025-03-17 19:46:50,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 1832 transitions, 24462 flow. Second operand has 193 states, 193 states have (on average 10.010362694300518) internal successors, (1932), 193 states have internal predecessors, (1932), 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 19:46:50,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:46:50,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2025-03-17 19:46:50,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand