./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.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 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 15:29:34,034 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 15:29:34,070 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2025-03-04 15:29:34,073 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 15:29:34,074 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 15:29:34,095 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 15:29:34,097 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 15:29:34,097 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 15:29:34,097 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 15:29:34,097 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 15:29:34,098 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 15:29:34,098 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 15:29:34,098 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 15:29:34,098 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 15:29:34,099 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 15:29:34,099 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 15:29:34,099 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-04 15:29:34,099 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 15:29:34,099 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 15:29:34,099 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 15:29:34,100 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 15:29:34,100 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-04 15:29:34,100 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 15:29:34,100 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-04 15:29:34,100 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2025-03-04 15:29:34,100 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-04 15:29:34,100 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 15:29:34,100 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-04 15:29:34,100 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 15:29:34,100 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 15:29:34,101 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 15:29:34,101 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 15:29:34,101 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 15:29:34,101 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 15:29:34,101 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 15:29:34,101 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 15:29:34,101 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 15:29:34,101 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-04 15:29:34,101 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-04 15:29:34,101 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-04 15:29:34,101 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-04 15:29:34,101 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 15:29:34,101 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 15:29:34,102 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 15:29:34,102 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 15:29:34,102 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 -> 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d [2025-03-04 15:29:34,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 15:29:34,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 15:29:34,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 15:29:34,331 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 15:29:34,331 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 15:29:34,332 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2025-03-04 15:29:35,443 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0aba61275/0451fb8d5b404f94b021bd6273b0fa39/FLAG3a3cdf6c5 [2025-03-04 15:29:35,646 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 15:29:35,646 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2025-03-04 15:29:35,652 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0aba61275/0451fb8d5b404f94b021bd6273b0fa39/FLAG3a3cdf6c5 [2025-03-04 15:29:36,008 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0aba61275/0451fb8d5b404f94b021bd6273b0fa39 [2025-03-04 15:29:36,010 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 15:29:36,011 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 15:29:36,012 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 15:29:36,013 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 15:29:36,016 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 15:29:36,017 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 03:29:36" (1/1) ... [2025-03-04 15:29:36,017 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d577e8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:29:36, skipping insertion in model container [2025-03-04 15:29:36,017 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 03:29:36" (1/1) ... [2025-03-04 15:29:36,028 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 15:29:36,139 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 15:29:36,146 INFO L200 MainTranslator]: Completed pre-run [2025-03-04 15:29:36,160 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 15:29:36,169 INFO L204 MainTranslator]: Completed translation [2025-03-04 15:29:36,170 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:29:36 WrapperNode [2025-03-04 15:29:36,170 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 15:29:36,171 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-04 15:29:36,171 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-04 15:29:36,171 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-04 15:29:36,175 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:29:36" (1/1) ... [2025-03-04 15:29:36,178 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:29:36" (1/1) ... [2025-03-04 15:29:36,191 INFO L138 Inliner]: procedures = 24, calls = 30, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 164 [2025-03-04 15:29:36,191 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-04 15:29:36,192 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-04 15:29:36,192 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-04 15:29:36,192 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-04 15:29:36,197 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:29:36" (1/1) ... [2025-03-04 15:29:36,197 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:29:36" (1/1) ... [2025-03-04 15:29:36,199 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:29:36" (1/1) ... [2025-03-04 15:29:36,208 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-04 15:29:36,208 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:29:36" (1/1) ... [2025-03-04 15:29:36,208 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:29:36" (1/1) ... [2025-03-04 15:29:36,211 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:29:36" (1/1) ... [2025-03-04 15:29:36,212 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:29:36" (1/1) ... [2025-03-04 15:29:36,213 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:29:36" (1/1) ... [2025-03-04 15:29:36,213 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:29:36" (1/1) ... [2025-03-04 15:29:36,215 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-04 15:29:36,215 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-04 15:29:36,215 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-04 15:29:36,215 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-04 15:29:36,219 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:29:36" (1/1) ... [2025-03-04 15:29:36,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 15:29:36,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:29:36,242 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-04 15:29:36,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-04 15:29:36,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-04 15:29:36,260 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-04 15:29:36,260 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-04 15:29:36,261 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-04 15:29:36,261 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-04 15:29:36,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-04 15:29:36,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-04 15:29:36,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-04 15:29:36,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-04 15:29:36,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-04 15:29:36,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-04 15:29:36,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-04 15:29:36,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-04 15:29:36,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-04 15:29:36,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-04 15:29:36,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-04 15:29:36,262 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-04 15:29:36,335 INFO L256 CfgBuilder]: Building ICFG [2025-03-04 15:29:36,336 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-04 15:29:36,593 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-04 15:29:36,593 INFO L307 CfgBuilder]: Performing block encoding [2025-03-04 15:29:36,785 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-04 15:29:36,785 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-04 15:29:36,786 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 03:29:36 BoogieIcfgContainer [2025-03-04 15:29:36,786 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-04 15:29:36,787 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-04 15:29:36,788 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-04 15:29:36,791 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-04 15:29:36,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.03 03:29:36" (1/3) ... [2025-03-04 15:29:36,791 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b99e89e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 03:29:36, skipping insertion in model container [2025-03-04 15:29:36,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 03:29:36" (2/3) ... [2025-03-04 15:29:36,792 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b99e89e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 03:29:36, skipping insertion in model container [2025-03-04 15:29:36,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 03:29:36" (3/3) ... [2025-03-04 15:29:36,792 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2025-03-04 15:29:36,802 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-04 15:29:36,804 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-queue-add-2-nl.wvr.c that has 3 procedures, 40 locations, 1 initial locations, 3 loop locations, and 12 error locations. [2025-03-04 15:29:36,804 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-04 15:29:36,854 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-04 15:29:36,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 46 places, 43 transitions, 100 flow [2025-03-04 15:29:36,908 INFO L124 PetriNetUnfolderBase]: 4/41 cut-off events. [2025-03-04 15:29:36,912 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-04 15:29:36,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 41 events. 4/41 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 123 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2025-03-04 15:29:36,916 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 43 transitions, 100 flow [2025-03-04 15:29:36,918 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 39 transitions, 87 flow [2025-03-04 15:29:36,925 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 15:29:36,938 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;@390c9811, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 15:29:36,938 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2025-03-04 15:29:36,944 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-04 15:29:36,944 INFO L124 PetriNetUnfolderBase]: 1/5 cut-off events. [2025-03-04 15:29:36,944 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-04 15:29:36,945 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:29:36,945 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-04 15:29:36,945 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2025-03-04 15:29:36,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:29:36,951 INFO L85 PathProgramCache]: Analyzing trace with hash 454034, now seen corresponding path program 1 times [2025-03-04 15:29:36,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:29:36,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537878724] [2025-03-04 15:29:36,959 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:29:36,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:29:37,016 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-04 15:29:37,036 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-04 15:29:37,036 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:29:37,036 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:29:37,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:29:37,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537878724] [2025-03-04 15:29:37,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537878724] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:29:37,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 15:29:37,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 15:29:37,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795507929] [2025-03-04 15:29:37,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:29:37,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 15:29:37,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:29:37,229 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 15:29:37,229 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 15:29:37,240 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2025-03-04 15:29:37,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:37,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:29:37,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2025-03-04 15:29:37,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:29:37,418 INFO L124 PetriNetUnfolderBase]: 184/425 cut-off events. [2025-03-04 15:29:37,418 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2025-03-04 15:29:37,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 764 conditions, 425 events. 184/425 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2200 event pairs, 154 based on Foata normal form. 1/325 useless extension candidates. Maximal degree in co-relation 708. Up to 308 conditions per place. [2025-03-04 15:29:37,424 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 24 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2025-03-04 15:29:37,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 38 transitions, 141 flow [2025-03-04 15:29:37,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 15:29:37,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 15:29:37,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 82 transitions. [2025-03-04 15:29:37,433 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2025-03-04 15:29:37,434 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 87 flow. Second operand 4 states and 82 transitions. [2025-03-04 15:29:37,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 38 transitions, 141 flow [2025-03-04 15:29:37,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 136 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 15:29:37,441 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 103 flow [2025-03-04 15:29:37,442 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2025-03-04 15:29:37,446 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2025-03-04 15:29:37,446 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 103 flow [2025-03-04 15:29:37,447 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:37,447 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:29:37,447 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-03-04 15:29:37,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-04 15:29:37,448 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2025-03-04 15:29:37,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:29:37,448 INFO L85 PathProgramCache]: Analyzing trace with hash 641629068, now seen corresponding path program 1 times [2025-03-04 15:29:37,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:29:37,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541186408] [2025-03-04 15:29:37,448 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:29:37,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:29:37,462 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-04 15:29:37,471 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-04 15:29:37,472 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:29:37,472 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:37,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:29:37,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:29:37,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541186408] [2025-03-04 15:29:37,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541186408] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:29:37,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917838783] [2025-03-04 15:29:37,576 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:29:37,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:29:37,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:29:37,580 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 15:29:37,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-04 15:29:37,631 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-04 15:29:37,643 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-04 15:29:37,644 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:29:37,644 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:37,645 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-04 15:29:37,647 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 15:29:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:29:37,691 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 15:29:37,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917838783] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:29:37,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-04 15:29:37,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-03-04 15:29:37,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140068780] [2025-03-04 15:29:37,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:29:37,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 15:29:37,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:29:37,693 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 15:29:37,693 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-04 15:29:37,705 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2025-03-04 15:29:37,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 103 flow. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:37,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:29:37,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2025-03-04 15:29:37,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:29:37,853 INFO L124 PetriNetUnfolderBase]: 184/424 cut-off events. [2025-03-04 15:29:37,853 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-04 15:29:37,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 767 conditions, 424 events. 184/424 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2190 event pairs, 154 based on Foata normal form. 1/325 useless extension candidates. Maximal degree in co-relation 740. Up to 303 conditions per place. [2025-03-04 15:29:37,859 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 20 selfloop transitions, 7 changer transitions 0/37 dead transitions. [2025-03-04 15:29:37,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 153 flow [2025-03-04 15:29:37,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 15:29:37,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-04 15:29:37,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2025-03-04 15:29:37,861 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2025-03-04 15:29:37,861 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 103 flow. Second operand 6 states and 100 transitions. [2025-03-04 15:29:37,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 153 flow [2025-03-04 15:29:37,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 37 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 15:29:37,862 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 110 flow [2025-03-04 15:29:37,862 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=110, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2025-03-04 15:29:37,863 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2025-03-04 15:29:37,864 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 110 flow [2025-03-04 15:29:37,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:37,864 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:29:37,864 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-04 15:29:37,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-04 15:29:38,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:29:38,069 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2025-03-04 15:29:38,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:29:38,070 INFO L85 PathProgramCache]: Analyzing trace with hash 643542766, now seen corresponding path program 1 times [2025-03-04 15:29:38,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:29:38,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094737027] [2025-03-04 15:29:38,070 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:29:38,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:29:38,076 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-04 15:29:38,092 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-04 15:29:38,092 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:29:38,092 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:29:38,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:29:38,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094737027] [2025-03-04 15:29:38,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094737027] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:29:38,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 15:29:38,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 15:29:38,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38889077] [2025-03-04 15:29:38,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:29:38,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 15:29:38,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:29:38,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 15:29:38,191 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 15:29:38,191 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2025-03-04 15:29:38,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:38,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:29:38,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2025-03-04 15:29:38,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:29:38,306 INFO L124 PetriNetUnfolderBase]: 198/443 cut-off events. [2025-03-04 15:29:38,306 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-03-04 15:29:38,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 828 conditions, 443 events. 198/443 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2149 event pairs, 167 based on Foata normal form. 17/366 useless extension candidates. Maximal degree in co-relation 728. Up to 305 conditions per place. [2025-03-04 15:29:38,309 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 23 selfloop transitions, 2 changer transitions 8/44 dead transitions. [2025-03-04 15:29:38,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 193 flow [2025-03-04 15:29:38,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 15:29:38,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 15:29:38,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2025-03-04 15:29:38,310 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5523255813953488 [2025-03-04 15:29:38,310 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 110 flow. Second operand 4 states and 95 transitions. [2025-03-04 15:29:38,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 193 flow [2025-03-04 15:29:38,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 44 transitions, 171 flow, removed 2 selfloop flow, removed 5 redundant places. [2025-03-04 15:29:38,311 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2025-03-04 15:29:38,312 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2025-03-04 15:29:38,312 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2025-03-04 15:29:38,312 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2025-03-04 15:29:38,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:38,312 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:29:38,312 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2025-03-04 15:29:38,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-04 15:29:38,313 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2025-03-04 15:29:38,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:29:38,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1584334967, now seen corresponding path program 1 times [2025-03-04 15:29:38,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:29:38,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195305460] [2025-03-04 15:29:38,313 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:29:38,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:29:38,321 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-04 15:29:38,326 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-04 15:29:38,326 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:29:38,326 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:29:38,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:29:38,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195305460] [2025-03-04 15:29:38,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195305460] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:29:38,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001572220] [2025-03-04 15:29:38,383 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:29:38,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:29:38,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:29:38,385 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) [2025-03-04 15:29:38,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-04 15:29:38,422 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-04 15:29:38,432 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-04 15:29:38,432 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:29:38,433 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:38,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-04 15:29:38,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 15:29:38,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:29:38,455 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 15:29:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:29:38,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001572220] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 15:29:38,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 15:29:38,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-03-04 15:29:38,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815937930] [2025-03-04 15:29:38,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 15:29:38,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-04 15:29:38,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:29:38,492 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-04 15:29:38,492 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-03-04 15:29:38,506 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2025-03-04 15:29:38,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 12 states, 12 states have (on average 13.083333333333334) internal successors, (157), 12 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:38,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:29:38,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2025-03-04 15:29:38,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:29:38,642 INFO L124 PetriNetUnfolderBase]: 186/435 cut-off events. [2025-03-04 15:29:38,642 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2025-03-04 15:29:38,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 435 events. 186/435 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2289 event pairs, 154 based on Foata normal form. 3/336 useless extension candidates. Maximal degree in co-relation 866. Up to 309 conditions per place. [2025-03-04 15:29:38,645 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 23 selfloop transitions, 12 changer transitions 0/45 dead transitions. [2025-03-04 15:29:38,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 45 transitions, 202 flow [2025-03-04 15:29:38,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 15:29:38,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 15:29:38,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2025-03-04 15:29:38,648 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3674418604651163 [2025-03-04 15:29:38,648 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 10 states and 158 transitions. [2025-03-04 15:29:38,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 45 transitions, 202 flow [2025-03-04 15:29:38,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 45 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 15:29:38,649 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 170 flow [2025-03-04 15:29:38,649 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=170, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2025-03-04 15:29:38,650 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2025-03-04 15:29:38,650 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 170 flow [2025-03-04 15:29:38,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.083333333333334) internal successors, (157), 12 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:38,650 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:29:38,650 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:29:38,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-04 15:29:38,850 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,SelfDestructingSolverStorable3 [2025-03-04 15:29:38,851 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2025-03-04 15:29:38,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:29:38,851 INFO L85 PathProgramCache]: Analyzing trace with hash -2125551948, now seen corresponding path program 1 times [2025-03-04 15:29:38,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:29:38,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834601279] [2025-03-04 15:29:38,851 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:29:38,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:29:38,859 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-04 15:29:38,866 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-04 15:29:38,869 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:29:38,870 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:29:38,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:29:38,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834601279] [2025-03-04 15:29:38,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834601279] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:29:38,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237050339] [2025-03-04 15:29:38,952 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:29:38,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:29:38,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:29:38,954 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) [2025-03-04 15:29:38,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-04 15:29:38,990 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-04 15:29:39,000 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-04 15:29:39,000 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:29:39,000 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:39,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-04 15:29:39,001 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 15:29:39,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 15:29:39,018 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 15:29:39,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237050339] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:29:39,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-04 15:29:39,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2025-03-04 15:29:39,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647260809] [2025-03-04 15:29:39,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:29:39,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 15:29:39,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:29:39,019 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 15:29:39,019 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-04 15:29:39,019 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2025-03-04 15:29:39,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:39,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:29:39,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2025-03-04 15:29:39,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:29:39,070 INFO L124 PetriNetUnfolderBase]: 124/308 cut-off events. [2025-03-04 15:29:39,071 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2025-03-04 15:29:39,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 308 events. 124/308 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1457 event pairs, 98 based on Foata normal form. 0/266 useless extension candidates. Maximal degree in co-relation 581. Up to 214 conditions per place. [2025-03-04 15:29:39,072 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 30 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2025-03-04 15:29:39,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 42 transitions, 220 flow [2025-03-04 15:29:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 15:29:39,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 15:29:39,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2025-03-04 15:29:39,073 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5038759689922481 [2025-03-04 15:29:39,073 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 170 flow. Second operand 3 states and 65 transitions. [2025-03-04 15:29:39,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 42 transitions, 220 flow [2025-03-04 15:29:39,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 42 transitions, 210 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-03-04 15:29:39,074 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 150 flow [2025-03-04 15:29:39,074 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2025-03-04 15:29:39,075 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2025-03-04 15:29:39,075 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 150 flow [2025-03-04 15:29:39,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:39,075 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:29:39,075 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:29:39,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-04 15:29:39,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:29:39,276 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2025-03-04 15:29:39,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:29:39,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1731370195, now seen corresponding path program 1 times [2025-03-04 15:29:39,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:29:39,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90040637] [2025-03-04 15:29:39,276 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:29:39,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:29:39,281 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-04 15:29:39,284 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-04 15:29:39,284 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:29:39,284 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 15:29:39,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:29:39,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90040637] [2025-03-04 15:29:39,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90040637] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:29:39,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 15:29:39,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 15:29:39,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408804989] [2025-03-04 15:29:39,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:29:39,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 15:29:39,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:29:39,310 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 15:29:39,310 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 15:29:39,310 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2025-03-04 15:29:39,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:39,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:29:39,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2025-03-04 15:29:39,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:29:39,369 INFO L124 PetriNetUnfolderBase]: 133/311 cut-off events. [2025-03-04 15:29:39,370 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2025-03-04 15:29:39,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 311 events. 133/311 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1336 event pairs, 40 based on Foata normal form. 6/284 useless extension candidates. Maximal degree in co-relation 633. Up to 184 conditions per place. [2025-03-04 15:29:39,371 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 35 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2025-03-04 15:29:39,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 49 transitions, 246 flow [2025-03-04 15:29:39,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 15:29:39,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 15:29:39,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2025-03-04 15:29:39,372 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5426356589147286 [2025-03-04 15:29:39,372 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 150 flow. Second operand 3 states and 70 transitions. [2025-03-04 15:29:39,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 49 transitions, 246 flow [2025-03-04 15:29:39,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 49 transitions, 245 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 15:29:39,374 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 172 flow [2025-03-04 15:29:39,374 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2025-03-04 15:29:39,374 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2025-03-04 15:29:39,374 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 172 flow [2025-03-04 15:29:39,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:39,375 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:29:39,375 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:29:39,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-04 15:29:39,375 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2025-03-04 15:29:39,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:29:39,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1749026328, now seen corresponding path program 1 times [2025-03-04 15:29:39,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:29:39,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146226943] [2025-03-04 15:29:39,375 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:29:39,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:29:39,383 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-04 15:29:39,391 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-04 15:29:39,391 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:29:39,391 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:39,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 15:29:39,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:29:39,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146226943] [2025-03-04 15:29:39,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146226943] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:29:39,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 15:29:39,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 15:29:39,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654040546] [2025-03-04 15:29:39,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:29:39,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 15:29:39,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:29:39,435 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 15:29:39,435 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 15:29:39,446 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2025-03-04 15:29:39,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:39,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:29:39,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2025-03-04 15:29:39,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:29:39,521 INFO L124 PetriNetUnfolderBase]: 189/408 cut-off events. [2025-03-04 15:29:39,521 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2025-03-04 15:29:39,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 937 conditions, 408 events. 189/408 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1806 event pairs, 89 based on Foata normal form. 12/393 useless extension candidates. Maximal degree in co-relation 923. Up to 278 conditions per place. [2025-03-04 15:29:39,523 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 48 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2025-03-04 15:29:39,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 61 transitions, 322 flow [2025-03-04 15:29:39,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 15:29:39,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 15:29:39,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2025-03-04 15:29:39,524 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5232558139534884 [2025-03-04 15:29:39,524 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 172 flow. Second operand 4 states and 90 transitions. [2025-03-04 15:29:39,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 61 transitions, 322 flow [2025-03-04 15:29:39,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 61 transitions, 305 flow, removed 7 selfloop flow, removed 2 redundant places. [2025-03-04 15:29:39,526 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 188 flow [2025-03-04 15:29:39,526 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2025-03-04 15:29:39,529 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2025-03-04 15:29:39,529 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 188 flow [2025-03-04 15:29:39,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:39,529 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:29:39,529 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:29:39,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-04 15:29:39,529 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2025-03-04 15:29:39,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:29:39,530 INFO L85 PathProgramCache]: Analyzing trace with hash 969495379, now seen corresponding path program 1 times [2025-03-04 15:29:39,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:29:39,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581784588] [2025-03-04 15:29:39,530 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:29:39,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:29:39,537 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-04 15:29:39,551 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-04 15:29:39,551 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:29:39,551 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:29:39,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:29:39,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581784588] [2025-03-04 15:29:39,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581784588] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:29:39,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303419055] [2025-03-04 15:29:39,882 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:29:39,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:29:39,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:29:39,885 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) [2025-03-04 15:29:39,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-04 15:29:39,922 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-04 15:29:39,935 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-04 15:29:39,936 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:29:39,936 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:39,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-04 15:29:39,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 15:29:39,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-03-04 15:29:40,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-03-04 15:29:40,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:29:40,298 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 15:29:40,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2025-03-04 15:29:40,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2025-03-04 15:29:40,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:29:40,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303419055] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 15:29:40,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 15:29:40,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2025-03-04 15:29:40,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603878928] [2025-03-04 15:29:40,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 15:29:40,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-04 15:29:40,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:29:40,615 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-04 15:29:40,615 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2025-03-04 15:29:40,755 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2025-03-04 15:29:40,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 188 flow. Second operand has 23 states, 23 states have (on average 9.565217391304348) internal successors, (220), 23 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:40,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:29:40,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2025-03-04 15:29:40,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:29:43,242 INFO L124 PetriNetUnfolderBase]: 1368/2616 cut-off events. [2025-03-04 15:29:43,242 INFO L125 PetriNetUnfolderBase]: For 894/992 co-relation queries the response was YES. [2025-03-04 15:29:43,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6274 conditions, 2616 events. 1368/2616 cut-off events. For 894/992 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 16431 event pairs, 114 based on Foata normal form. 0/2479 useless extension candidates. Maximal degree in co-relation 6259. Up to 428 conditions per place. [2025-03-04 15:29:43,252 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 226 selfloop transitions, 57 changer transitions 0/289 dead transitions. [2025-03-04 15:29:43,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 289 transitions, 1578 flow [2025-03-04 15:29:43,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-04 15:29:43,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-03-04 15:29:43,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 479 transitions. [2025-03-04 15:29:43,255 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3978405315614618 [2025-03-04 15:29:43,255 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 188 flow. Second operand 28 states and 479 transitions. [2025-03-04 15:29:43,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 289 transitions, 1578 flow [2025-03-04 15:29:43,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 289 transitions, 1554 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 15:29:43,263 INFO L231 Difference]: Finished difference. Result has 96 places, 94 transitions, 607 flow [2025-03-04 15:29:43,263 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=607, PETRI_PLACES=96, PETRI_TRANSITIONS=94} [2025-03-04 15:29:43,264 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2025-03-04 15:29:43,264 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 94 transitions, 607 flow [2025-03-04 15:29:43,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.565217391304348) internal successors, (220), 23 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:43,264 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:29:43,264 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:29:43,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-04 15:29:43,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:29:43,465 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2025-03-04 15:29:43,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:29:43,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1415771395, now seen corresponding path program 1 times [2025-03-04 15:29:43,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:29:43,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104893806] [2025-03-04 15:29:43,466 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:29:43,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:29:43,471 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-04 15:29:43,486 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 15:29:43,486 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:29:43,486 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:29:43,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:29:43,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104893806] [2025-03-04 15:29:43,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104893806] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:29:43,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700175106] [2025-03-04 15:29:43,733 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:29:43,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:29:43,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:29:43,734 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) [2025-03-04 15:29:43,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-04 15:29:43,775 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-04 15:29:43,788 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 15:29:43,788 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:29:43,788 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:43,791 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-04 15:29:43,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 15:29:43,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-03-04 15:29:44,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-04 15:29:44,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:29:44,040 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 15:29:44,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2025-03-04 15:29:44,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2025-03-04 15:29:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:29:44,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700175106] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 15:29:44,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 15:29:44,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2025-03-04 15:29:44,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181390198] [2025-03-04 15:29:44,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 15:29:44,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-04 15:29:44,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:29:44,311 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-04 15:29:44,312 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2025-03-04 15:29:44,455 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2025-03-04 15:29:44,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 94 transitions, 607 flow. Second operand has 23 states, 23 states have (on average 10.565217391304348) internal successors, (243), 23 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:44,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:29:44,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2025-03-04 15:29:44,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:29:47,255 INFO L124 PetriNetUnfolderBase]: 2010/4104 cut-off events. [2025-03-04 15:29:47,255 INFO L125 PetriNetUnfolderBase]: For 14978/15121 co-relation queries the response was YES. [2025-03-04 15:29:47,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13639 conditions, 4104 events. 2010/4104 cut-off events. For 14978/15121 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 28672 event pairs, 124 based on Foata normal form. 142/4241 useless extension candidates. Maximal degree in co-relation 13607. Up to 709 conditions per place. [2025-03-04 15:29:47,279 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 216 selfloop transitions, 125 changer transitions 8/358 dead transitions. [2025-03-04 15:29:47,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 358 transitions, 2827 flow [2025-03-04 15:29:47,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-03-04 15:29:47,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2025-03-04 15:29:47,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 563 transitions. [2025-03-04 15:29:47,282 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3967582804792107 [2025-03-04 15:29:47,282 INFO L175 Difference]: Start difference. First operand has 96 places, 94 transitions, 607 flow. Second operand 33 states and 563 transitions. [2025-03-04 15:29:47,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 358 transitions, 2827 flow [2025-03-04 15:29:47,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 358 transitions, 2734 flow, removed 42 selfloop flow, removed 4 redundant places. [2025-03-04 15:29:47,325 INFO L231 Difference]: Finished difference. Result has 138 places, 169 transitions, 1642 flow [2025-03-04 15:29:47,325 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1642, PETRI_PLACES=138, PETRI_TRANSITIONS=169} [2025-03-04 15:29:47,326 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2025-03-04 15:29:47,326 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 169 transitions, 1642 flow [2025-03-04 15:29:47,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.565217391304348) internal successors, (243), 23 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:47,327 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:29:47,327 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2025-03-04 15:29:47,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-04 15:29:47,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:29:47,531 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2025-03-04 15:29:47,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:29:47,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1170504387, now seen corresponding path program 2 times [2025-03-04 15:29:47,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:29:47,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237141566] [2025-03-04 15:29:47,531 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 15:29:47,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:29:47,537 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-04 15:29:47,543 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 15:29:47,543 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 15:29:47,543 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-04 15:29:47,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:29:47,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237141566] [2025-03-04 15:29:47,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237141566] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:29:47,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577238669] [2025-03-04 15:29:47,589 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 15:29:47,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:29:47,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:29:47,591 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) [2025-03-04 15:29:47,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-04 15:29:47,631 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-04 15:29:47,641 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 15:29:47,641 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 15:29:47,641 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:47,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-04 15:29:47,642 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 15:29:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-04 15:29:47,656 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 15:29:47,672 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-04 15:29:47,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577238669] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 15:29:47,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 15:29:47,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2025-03-04 15:29:47,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090625077] [2025-03-04 15:29:47,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 15:29:47,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 15:29:47,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:29:47,672 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 15:29:47,673 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 15:29:47,677 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2025-03-04 15:29:47,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 169 transitions, 1642 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:47,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:29:47,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2025-03-04 15:29:47,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:29:47,941 INFO L124 PetriNetUnfolderBase]: 1562/3474 cut-off events. [2025-03-04 15:29:47,941 INFO L125 PetriNetUnfolderBase]: For 24535/24725 co-relation queries the response was YES. [2025-03-04 15:29:47,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13633 conditions, 3474 events. 1562/3474 cut-off events. For 24535/24725 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 25439 event pairs, 1015 based on Foata normal form. 12/3331 useless extension candidates. Maximal degree in co-relation 13586. Up to 2602 conditions per place. [2025-03-04 15:29:47,959 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 136 selfloop transitions, 15 changer transitions 0/168 dead transitions. [2025-03-04 15:29:47,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 168 transitions, 1934 flow [2025-03-04 15:29:47,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 15:29:47,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 15:29:47,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2025-03-04 15:29:47,960 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2025-03-04 15:29:47,960 INFO L175 Difference]: Start difference. First operand has 138 places, 169 transitions, 1642 flow. Second operand 4 states and 69 transitions. [2025-03-04 15:29:47,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 168 transitions, 1934 flow [2025-03-04 15:29:48,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 168 transitions, 1783 flow, removed 58 selfloop flow, removed 13 redundant places. [2025-03-04 15:29:48,032 INFO L231 Difference]: Finished difference. Result has 127 places, 168 transitions, 1511 flow [2025-03-04 15:29:48,033 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1481, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1511, PETRI_PLACES=127, PETRI_TRANSITIONS=168} [2025-03-04 15:29:48,033 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2025-03-04 15:29:48,033 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 168 transitions, 1511 flow [2025-03-04 15:29:48,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:48,033 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:29:48,033 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:29:48,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-04 15:29:48,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:29:48,236 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2025-03-04 15:29:48,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:29:48,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1041912922, now seen corresponding path program 1 times [2025-03-04 15:29:48,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:29:48,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967239355] [2025-03-04 15:29:48,236 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:29:48,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:29:48,241 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-04 15:29:48,246 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 15:29:48,247 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:29:48,247 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:48,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:29:48,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:29:48,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967239355] [2025-03-04 15:29:48,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967239355] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:29:48,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966382445] [2025-03-04 15:29:48,343 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:29:48,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:29:48,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:29:48,345 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) [2025-03-04 15:29:48,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-04 15:29:48,381 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-04 15:29:48,391 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 15:29:48,392 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:29:48,392 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:48,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-04 15:29:48,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 15:29:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:29:48,441 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 15:29:48,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:29:48,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966382445] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 15:29:48,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 15:29:48,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2025-03-04 15:29:48,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053102576] [2025-03-04 15:29:48,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 15:29:48,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-04 15:29:48,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:29:48,505 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-04 15:29:48,505 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2025-03-04 15:29:48,516 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2025-03-04 15:29:48,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 168 transitions, 1511 flow. Second operand has 15 states, 15 states have (on average 13.8) internal successors, (207), 15 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:48,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:29:48,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2025-03-04 15:29:48,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:29:48,739 INFO L124 PetriNetUnfolderBase]: 594/1335 cut-off events. [2025-03-04 15:29:48,739 INFO L125 PetriNetUnfolderBase]: For 10017/10049 co-relation queries the response was YES. [2025-03-04 15:29:48,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5384 conditions, 1335 events. 594/1335 cut-off events. For 10017/10049 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8466 event pairs, 349 based on Foata normal form. 64/1334 useless extension candidates. Maximal degree in co-relation 5348. Up to 615 conditions per place. [2025-03-04 15:29:48,749 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 67 selfloop transitions, 15 changer transitions 1/97 dead transitions. [2025-03-04 15:29:48,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 97 transitions, 854 flow [2025-03-04 15:29:48,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-04 15:29:48,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-04 15:29:48,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2025-03-04 15:29:48,751 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2025-03-04 15:29:48,751 INFO L175 Difference]: Start difference. First operand has 127 places, 168 transitions, 1511 flow. Second operand 8 states and 144 transitions. [2025-03-04 15:29:48,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 97 transitions, 854 flow [2025-03-04 15:29:48,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 97 transitions, 776 flow, removed 16 selfloop flow, removed 17 redundant places. [2025-03-04 15:29:48,772 INFO L231 Difference]: Finished difference. Result has 105 places, 82 transitions, 598 flow [2025-03-04 15:29:48,772 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=598, PETRI_PLACES=105, PETRI_TRANSITIONS=82} [2025-03-04 15:29:48,773 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2025-03-04 15:29:48,773 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 82 transitions, 598 flow [2025-03-04 15:29:48,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 13.8) internal successors, (207), 15 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:48,773 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:29:48,773 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:29:48,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-04 15:29:48,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:29:48,974 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2025-03-04 15:29:48,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:29:48,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1376483857, now seen corresponding path program 2 times [2025-03-04 15:29:48,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:29:48,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910389381] [2025-03-04 15:29:48,974 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 15:29:48,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:29:48,980 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-04 15:29:48,993 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-04 15:29:48,993 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 15:29:48,993 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:49,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 15:29:49,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:29:49,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910389381] [2025-03-04 15:29:49,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910389381] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:29:49,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 15:29:49,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 15:29:49,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583504200] [2025-03-04 15:29:49,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:29:49,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 15:29:49,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:29:49,075 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 15:29:49,075 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-04 15:29:49,088 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2025-03-04 15:29:49,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 82 transitions, 598 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:49,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:29:49,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2025-03-04 15:29:49,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:29:49,298 INFO L124 PetriNetUnfolderBase]: 777/1676 cut-off events. [2025-03-04 15:29:49,299 INFO L125 PetriNetUnfolderBase]: For 8058/8088 co-relation queries the response was YES. [2025-03-04 15:29:49,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6262 conditions, 1676 events. 777/1676 cut-off events. For 8058/8088 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10797 event pairs, 87 based on Foata normal form. 59/1730 useless extension candidates. Maximal degree in co-relation 6235. Up to 683 conditions per place. [2025-03-04 15:29:49,312 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 94 selfloop transitions, 23 changer transitions 0/127 dead transitions. [2025-03-04 15:29:49,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 127 transitions, 1149 flow [2025-03-04 15:29:49,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 15:29:49,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-04 15:29:49,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2025-03-04 15:29:49,313 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5193798449612403 [2025-03-04 15:29:49,313 INFO L175 Difference]: Start difference. First operand has 105 places, 82 transitions, 598 flow. Second operand 6 states and 134 transitions. [2025-03-04 15:29:49,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 127 transitions, 1149 flow [2025-03-04 15:29:49,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 127 transitions, 1114 flow, removed 0 selfloop flow, removed 7 redundant places. [2025-03-04 15:29:49,332 INFO L231 Difference]: Finished difference. Result has 106 places, 89 transitions, 700 flow [2025-03-04 15:29:49,332 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=700, PETRI_PLACES=106, PETRI_TRANSITIONS=89} [2025-03-04 15:29:49,333 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2025-03-04 15:29:49,333 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 89 transitions, 700 flow [2025-03-04 15:29:49,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:49,333 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:29:49,333 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:29:49,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-04 15:29:49,333 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2025-03-04 15:29:49,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:29:49,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1418621057, now seen corresponding path program 1 times [2025-03-04 15:29:49,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:29:49,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477297720] [2025-03-04 15:29:49,334 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:29:49,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:29:49,338 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-04 15:29:49,354 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-04 15:29:49,355 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:29:49,356 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:29:49,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:29:49,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477297720] [2025-03-04 15:29:49,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477297720] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:29:49,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653505478] [2025-03-04 15:29:49,736 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:29:49,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:29:49,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:29:49,738 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) [2025-03-04 15:29:49,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-04 15:29:49,773 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-04 15:29:49,786 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-04 15:29:49,787 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:29:49,787 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:49,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-04 15:29:49,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 15:29:49,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 15:29:49,878 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 15:29:49,931 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-04 15:29:49,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 13 [2025-03-04 15:29:49,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 15:29:49,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653505478] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-04 15:29:49,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-04 15:29:49,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 6] total 18 [2025-03-04 15:29:49,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790843486] [2025-03-04 15:29:49,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:29:49,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 15:29:49,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:29:49,944 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 15:29:49,944 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2025-03-04 15:29:49,955 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2025-03-04 15:29:49,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 89 transitions, 700 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:49,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:29:49,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2025-03-04 15:29:49,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:29:50,129 INFO L124 PetriNetUnfolderBase]: 934/1853 cut-off events. [2025-03-04 15:29:50,129 INFO L125 PetriNetUnfolderBase]: For 9263/9309 co-relation queries the response was YES. [2025-03-04 15:29:50,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7406 conditions, 1853 events. 934/1853 cut-off events. For 9263/9309 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 11295 event pairs, 39 based on Foata normal form. 10/1858 useless extension candidates. Maximal degree in co-relation 7376. Up to 567 conditions per place. [2025-03-04 15:29:50,139 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 78 selfloop transitions, 41 changer transitions 0/126 dead transitions. [2025-03-04 15:29:50,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 126 transitions, 1197 flow [2025-03-04 15:29:50,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 15:29:50,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-04 15:29:50,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2025-03-04 15:29:50,141 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2025-03-04 15:29:50,141 INFO L175 Difference]: Start difference. First operand has 106 places, 89 transitions, 700 flow. Second operand 6 states and 124 transitions. [2025-03-04 15:29:50,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 126 transitions, 1197 flow [2025-03-04 15:29:50,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 126 transitions, 1186 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 15:29:50,161 INFO L231 Difference]: Finished difference. Result has 113 places, 93 transitions, 859 flow [2025-03-04 15:29:50,161 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=859, PETRI_PLACES=113, PETRI_TRANSITIONS=93} [2025-03-04 15:29:50,162 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2025-03-04 15:29:50,162 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 93 transitions, 859 flow [2025-03-04 15:29:50,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:50,162 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:29:50,162 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:29:50,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-04 15:29:50,362 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 [2025-03-04 15:29:50,363 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2025-03-04 15:29:50,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:29:50,363 INFO L85 PathProgramCache]: Analyzing trace with hash -2046069347, now seen corresponding path program 2 times [2025-03-04 15:29:50,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:29:50,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687197317] [2025-03-04 15:29:50,363 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 15:29:50,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:29:50,372 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-04 15:29:50,379 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-04 15:29:50,379 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 15:29:50,379 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:50,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 15:29:50,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:29:50,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687197317] [2025-03-04 15:29:50,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687197317] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:29:50,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 15:29:50,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 15:29:50,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522245669] [2025-03-04 15:29:50,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:29:50,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 15:29:50,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:29:50,438 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 15:29:50,438 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-04 15:29:50,456 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2025-03-04 15:29:50,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 93 transitions, 859 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:50,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:29:50,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2025-03-04 15:29:50,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:29:50,636 INFO L124 PetriNetUnfolderBase]: 822/1784 cut-off events. [2025-03-04 15:29:50,636 INFO L125 PetriNetUnfolderBase]: For 12123/12150 co-relation queries the response was YES. [2025-03-04 15:29:50,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7981 conditions, 1784 events. 822/1784 cut-off events. For 12123/12150 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11666 event pairs, 125 based on Foata normal form. 34/1808 useless extension candidates. Maximal degree in co-relation 7948. Up to 738 conditions per place. [2025-03-04 15:29:50,647 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 85 selfloop transitions, 22 changer transitions 0/120 dead transitions. [2025-03-04 15:29:50,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 120 transitions, 1266 flow [2025-03-04 15:29:50,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 15:29:50,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-04 15:29:50,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2025-03-04 15:29:50,649 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5162790697674419 [2025-03-04 15:29:50,649 INFO L175 Difference]: Start difference. First operand has 113 places, 93 transitions, 859 flow. Second operand 5 states and 111 transitions. [2025-03-04 15:29:50,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 120 transitions, 1266 flow [2025-03-04 15:29:50,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 120 transitions, 1231 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-03-04 15:29:50,677 INFO L231 Difference]: Finished difference. Result has 116 places, 95 transitions, 910 flow [2025-03-04 15:29:50,677 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=910, PETRI_PLACES=116, PETRI_TRANSITIONS=95} [2025-03-04 15:29:50,678 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2025-03-04 15:29:50,678 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 95 transitions, 910 flow [2025-03-04 15:29:50,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:50,679 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:29:50,679 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:29:50,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-03-04 15:29:50,679 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2025-03-04 15:29:50,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:29:50,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1033836353, now seen corresponding path program 1 times [2025-03-04 15:29:50,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:29:50,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426243632] [2025-03-04 15:29:50,680 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:29:50,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:29:50,686 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-04 15:29:50,696 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-04 15:29:50,696 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:29:50,696 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:29:51,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:29:51,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426243632] [2025-03-04 15:29:51,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426243632] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:29:51,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987865099] [2025-03-04 15:29:51,061 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:29:51,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:29:51,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:29:51,063 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) [2025-03-04 15:29:51,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-04 15:29:51,105 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-04 15:29:51,117 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-04 15:29:51,117 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:29:51,117 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:51,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-04 15:29:51,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 15:29:51,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 15:29:51,207 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 15:29:51,237 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 15:29:51,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2025-03-04 15:29:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 15:29:51,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987865099] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-04 15:29:51,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-04 15:29:51,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 6] total 18 [2025-03-04 15:29:51,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294093773] [2025-03-04 15:29:51,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:29:51,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 15:29:51,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:29:51,265 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 15:29:51,265 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2025-03-04 15:29:51,278 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2025-03-04 15:29:51,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 95 transitions, 910 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:51,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:29:51,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2025-03-04 15:29:51,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:29:51,447 INFO L124 PetriNetUnfolderBase]: 887/1881 cut-off events. [2025-03-04 15:29:51,447 INFO L125 PetriNetUnfolderBase]: For 13372/13406 co-relation queries the response was YES. [2025-03-04 15:29:51,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8518 conditions, 1881 events. 887/1881 cut-off events. For 13372/13406 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12157 event pairs, 275 based on Foata normal form. 5/1863 useless extension candidates. Maximal degree in co-relation 8483. Up to 1233 conditions per place. [2025-03-04 15:29:51,454 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 83 selfloop transitions, 21 changer transitions 0/115 dead transitions. [2025-03-04 15:29:51,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 115 transitions, 1246 flow [2025-03-04 15:29:51,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 15:29:51,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-04 15:29:51,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2025-03-04 15:29:51,455 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4790697674418605 [2025-03-04 15:29:51,455 INFO L175 Difference]: Start difference. First operand has 116 places, 95 transitions, 910 flow. Second operand 5 states and 103 transitions. [2025-03-04 15:29:51,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 115 transitions, 1246 flow [2025-03-04 15:29:51,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 115 transitions, 1209 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-03-04 15:29:51,478 INFO L231 Difference]: Finished difference. Result has 118 places, 97 transitions, 971 flow [2025-03-04 15:29:51,479 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=873, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=971, PETRI_PLACES=118, PETRI_TRANSITIONS=97} [2025-03-04 15:29:51,479 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2025-03-04 15:29:51,479 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 97 transitions, 971 flow [2025-03-04 15:29:51,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:51,479 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:29:51,479 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:29:51,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-04 15:29:51,679 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,SelfDestructingSolverStorable14 [2025-03-04 15:29:51,680 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2025-03-04 15:29:51,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:29:51,681 INFO L85 PathProgramCache]: Analyzing trace with hash 533253901, now seen corresponding path program 1 times [2025-03-04 15:29:51,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:29:51,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788873485] [2025-03-04 15:29:51,682 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:29:51,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:29:51,688 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-04 15:29:51,693 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-04 15:29:51,694 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:29:51,694 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:51,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:29:51,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:29:51,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788873485] [2025-03-04 15:29:51,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788873485] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:29:51,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460306645] [2025-03-04 15:29:51,759 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:29:51,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:29:51,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:29:51,761 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) [2025-03-04 15:29:51,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-04 15:29:51,811 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-04 15:29:51,824 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-04 15:29:51,824 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:29:51,824 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:51,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-04 15:29:51,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 15:29:51,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 15:29:51,853 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 15:29:51,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460306645] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:29:51,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-04 15:29:51,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2025-03-04 15:29:51,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882435982] [2025-03-04 15:29:51,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:29:51,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 15:29:51,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:29:51,854 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 15:29:51,854 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-03-04 15:29:51,855 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2025-03-04 15:29:51,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 97 transitions, 971 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:51,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:29:51,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2025-03-04 15:29:51,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:29:52,013 INFO L124 PetriNetUnfolderBase]: 974/2210 cut-off events. [2025-03-04 15:29:52,013 INFO L125 PetriNetUnfolderBase]: For 22351/22462 co-relation queries the response was YES. [2025-03-04 15:29:52,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10802 conditions, 2210 events. 974/2210 cut-off events. For 22351/22462 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 14826 event pairs, 246 based on Foata normal form. 46/2241 useless extension candidates. Maximal degree in co-relation 10767. Up to 626 conditions per place. [2025-03-04 15:29:52,023 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 74 selfloop transitions, 19 changer transitions 23/130 dead transitions. [2025-03-04 15:29:52,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 130 transitions, 1500 flow [2025-03-04 15:29:52,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 15:29:52,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 15:29:52,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2025-03-04 15:29:52,024 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2025-03-04 15:29:52,024 INFO L175 Difference]: Start difference. First operand has 118 places, 97 transitions, 971 flow. Second operand 4 states and 104 transitions. [2025-03-04 15:29:52,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 130 transitions, 1500 flow [2025-03-04 15:29:52,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 130 transitions, 1420 flow, removed 14 selfloop flow, removed 5 redundant places. [2025-03-04 15:29:52,056 INFO L231 Difference]: Finished difference. Result has 115 places, 79 transitions, 827 flow [2025-03-04 15:29:52,056 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=834, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=827, PETRI_PLACES=115, PETRI_TRANSITIONS=79} [2025-03-04 15:29:52,057 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2025-03-04 15:29:52,058 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 79 transitions, 827 flow [2025-03-04 15:29:52,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:52,058 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:29:52,058 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:29:52,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-04 15:29:52,258 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,SelfDestructingSolverStorable15 [2025-03-04 15:29:52,259 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2025-03-04 15:29:52,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:29:52,259 INFO L85 PathProgramCache]: Analyzing trace with hash -471413600, now seen corresponding path program 2 times [2025-03-04 15:29:52,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:29:52,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513863654] [2025-03-04 15:29:52,259 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 15:29:52,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:29:52,264 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-04 15:29:52,267 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-04 15:29:52,267 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 15:29:52,267 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-04 15:29:52,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:29:52,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513863654] [2025-03-04 15:29:52,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513863654] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:29:52,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 15:29:52,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 15:29:52,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711215064] [2025-03-04 15:29:52,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:29:52,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 15:29:52,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:29:52,297 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 15:29:52,297 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-04 15:29:52,303 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2025-03-04 15:29:52,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 79 transitions, 827 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:52,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:29:52,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2025-03-04 15:29:52,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:29:52,484 INFO L124 PetriNetUnfolderBase]: 991/1976 cut-off events. [2025-03-04 15:29:52,485 INFO L125 PetriNetUnfolderBase]: For 24014/24140 co-relation queries the response was YES. [2025-03-04 15:29:52,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10335 conditions, 1976 events. 991/1976 cut-off events. For 24014/24140 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12187 event pairs, 256 based on Foata normal form. 80/1987 useless extension candidates. Maximal degree in co-relation 10300. Up to 677 conditions per place. [2025-03-04 15:29:52,495 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 105 selfloop transitions, 7 changer transitions 1/124 dead transitions. [2025-03-04 15:29:52,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 124 transitions, 1654 flow [2025-03-04 15:29:52,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 15:29:52,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 15:29:52,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 81 transitions. [2025-03-04 15:29:52,495 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2025-03-04 15:29:52,495 INFO L175 Difference]: Start difference. First operand has 115 places, 79 transitions, 827 flow. Second operand 4 states and 81 transitions. [2025-03-04 15:29:52,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 124 transitions, 1654 flow [2025-03-04 15:29:52,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 124 transitions, 1467 flow, removed 73 selfloop flow, removed 11 redundant places. [2025-03-04 15:29:52,515 INFO L231 Difference]: Finished difference. Result has 88 places, 78 transitions, 700 flow [2025-03-04 15:29:52,515 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=700, PETRI_PLACES=88, PETRI_TRANSITIONS=78} [2025-03-04 15:29:52,516 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 46 predicate places. [2025-03-04 15:29:52,516 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 78 transitions, 700 flow [2025-03-04 15:29:52,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:52,516 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:29:52,516 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:29:52,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-03-04 15:29:52,516 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2025-03-04 15:29:52,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:29:52,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1250276755, now seen corresponding path program 3 times [2025-03-04 15:29:52,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:29:52,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730112431] [2025-03-04 15:29:52,517 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 15:29:52,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:29:52,523 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 4 equivalence classes. [2025-03-04 15:29:52,528 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 14 of 20 statements. [2025-03-04 15:29:52,528 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 15:29:52,528 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:52,576 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-04 15:29:52,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:29:52,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730112431] [2025-03-04 15:29:52,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730112431] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:29:52,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 15:29:52,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 15:29:52,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140338896] [2025-03-04 15:29:52,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:29:52,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 15:29:52,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:29:52,577 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 15:29:52,577 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-04 15:29:52,591 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2025-03-04 15:29:52,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 78 transitions, 700 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:52,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:29:52,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2025-03-04 15:29:52,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:29:52,781 INFO L124 PetriNetUnfolderBase]: 923/1936 cut-off events. [2025-03-04 15:29:52,781 INFO L125 PetriNetUnfolderBase]: For 11001/11065 co-relation queries the response was YES. [2025-03-04 15:29:52,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8338 conditions, 1936 events. 923/1936 cut-off events. For 11001/11065 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11722 event pairs, 175 based on Foata normal form. 68/1997 useless extension candidates. Maximal degree in co-relation 8312. Up to 604 conditions per place. [2025-03-04 15:29:52,792 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 81 selfloop transitions, 18 changer transitions 0/109 dead transitions. [2025-03-04 15:29:52,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 109 transitions, 1102 flow [2025-03-04 15:29:52,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 15:29:52,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-04 15:29:52,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2025-03-04 15:29:52,793 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5255813953488372 [2025-03-04 15:29:52,793 INFO L175 Difference]: Start difference. First operand has 88 places, 78 transitions, 700 flow. Second operand 5 states and 113 transitions. [2025-03-04 15:29:52,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 109 transitions, 1102 flow [2025-03-04 15:29:52,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 109 transitions, 1072 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 15:29:52,809 INFO L231 Difference]: Finished difference. Result has 90 places, 80 transitions, 769 flow [2025-03-04 15:29:52,809 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=769, PETRI_PLACES=90, PETRI_TRANSITIONS=80} [2025-03-04 15:29:52,809 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2025-03-04 15:29:52,809 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 80 transitions, 769 flow [2025-03-04 15:29:52,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:52,810 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:29:52,810 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:29:52,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-03-04 15:29:52,810 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2025-03-04 15:29:52,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:29:52,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1750340941, now seen corresponding path program 2 times [2025-03-04 15:29:52,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:29:52,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009172227] [2025-03-04 15:29:52,811 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 15:29:52,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:29:52,817 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-04 15:29:52,829 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 15:29:52,830 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 15:29:52,830 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:52,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-04 15:29:52,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:29:52,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009172227] [2025-03-04 15:29:52,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009172227] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:29:52,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 15:29:52,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 15:29:52,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169436619] [2025-03-04 15:29:52,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:29:52,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 15:29:52,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:29:52,897 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 15:29:52,898 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-04 15:29:52,910 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2025-03-04 15:29:52,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 80 transitions, 769 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:52,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:29:52,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2025-03-04 15:29:52,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:29:53,104 INFO L124 PetriNetUnfolderBase]: 1096/2183 cut-off events. [2025-03-04 15:29:53,104 INFO L125 PetriNetUnfolderBase]: For 12082/12155 co-relation queries the response was YES. [2025-03-04 15:29:53,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9195 conditions, 2183 events. 1096/2183 cut-off events. For 12082/12155 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12990 event pairs, 421 based on Foata normal form. 10/2186 useless extension candidates. Maximal degree in co-relation 9168. Up to 1708 conditions per place. [2025-03-04 15:29:53,117 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 74 selfloop transitions, 6 changer transitions 4/93 dead transitions. [2025-03-04 15:29:53,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 93 transitions, 974 flow [2025-03-04 15:29:53,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 15:29:53,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-04 15:29:53,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2025-03-04 15:29:53,118 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2025-03-04 15:29:53,119 INFO L175 Difference]: Start difference. First operand has 90 places, 80 transitions, 769 flow. Second operand 5 states and 100 transitions. [2025-03-04 15:29:53,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 93 transitions, 974 flow [2025-03-04 15:29:53,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 932 flow, removed 3 selfloop flow, removed 5 redundant places. [2025-03-04 15:29:53,133 INFO L231 Difference]: Finished difference. Result has 90 places, 78 transitions, 719 flow [2025-03-04 15:29:53,133 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=719, PETRI_PLACES=90, PETRI_TRANSITIONS=78} [2025-03-04 15:29:53,133 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2025-03-04 15:29:53,133 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 78 transitions, 719 flow [2025-03-04 15:29:53,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:53,134 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:29:53,134 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-03-04 15:29:53,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-03-04 15:29:53,134 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2025-03-04 15:29:53,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:29:53,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1728919286, now seen corresponding path program 1 times [2025-03-04 15:29:53,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:29:53,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379648463] [2025-03-04 15:29:53,134 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:29:53,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:29:53,138 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-04 15:29:53,141 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 15:29:53,142 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:29:53,142 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-04 15:29:53,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:29:53,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379648463] [2025-03-04 15:29:53,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379648463] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:29:53,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615817031] [2025-03-04 15:29:53,175 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:29:53,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:29:53,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:29:53,178 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) [2025-03-04 15:29:53,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-04 15:29:53,216 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-04 15:29:53,228 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 15:29:53,228 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:29:53,228 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:53,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-04 15:29:53,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 15:29:53,246 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-04 15:29:53,246 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 15:29:53,273 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-04 15:29:53,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615817031] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 15:29:53,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 15:29:53,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-04 15:29:53,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855965842] [2025-03-04 15:29:53,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 15:29:53,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-04 15:29:53,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:29:53,274 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-04 15:29:53,274 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-03-04 15:29:53,288 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2025-03-04 15:29:53,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 78 transitions, 719 flow. Second operand has 12 states, 12 states have (on average 13.916666666666666) internal successors, (167), 12 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:53,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:29:53,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2025-03-04 15:29:53,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:29:53,600 INFO L124 PetriNetUnfolderBase]: 1523/3220 cut-off events. [2025-03-04 15:29:53,600 INFO L125 PetriNetUnfolderBase]: For 19613/19940 co-relation queries the response was YES. [2025-03-04 15:29:53,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13356 conditions, 3220 events. 1523/3220 cut-off events. For 19613/19940 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 20287 event pairs, 389 based on Foata normal form. 0/3118 useless extension candidates. Maximal degree in co-relation 13329. Up to 1384 conditions per place. [2025-03-04 15:29:53,618 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 213 selfloop transitions, 13 changer transitions 0/237 dead transitions. [2025-03-04 15:29:53,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 237 transitions, 3019 flow [2025-03-04 15:29:53,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 15:29:53,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 15:29:53,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2025-03-04 15:29:53,619 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49767441860465117 [2025-03-04 15:29:53,619 INFO L175 Difference]: Start difference. First operand has 90 places, 78 transitions, 719 flow. Second operand 10 states and 214 transitions. [2025-03-04 15:29:53,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 237 transitions, 3019 flow [2025-03-04 15:29:53,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 237 transitions, 2983 flow, removed 10 selfloop flow, removed 4 redundant places. [2025-03-04 15:29:53,635 INFO L231 Difference]: Finished difference. Result has 98 places, 87 transitions, 775 flow [2025-03-04 15:29:53,635 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=775, PETRI_PLACES=98, PETRI_TRANSITIONS=87} [2025-03-04 15:29:53,636 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2025-03-04 15:29:53,636 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 87 transitions, 775 flow [2025-03-04 15:29:53,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.916666666666666) internal successors, (167), 12 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:53,636 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:29:53,636 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:29:53,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-04 15:29:53,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:29:53,837 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2025-03-04 15:29:53,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:29:53,837 INFO L85 PathProgramCache]: Analyzing trace with hash 56615853, now seen corresponding path program 2 times [2025-03-04 15:29:53,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:29:53,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064532020] [2025-03-04 15:29:53,837 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 15:29:53,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:29:53,842 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-04 15:29:53,849 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-04 15:29:53,849 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 15:29:53,849 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:53,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-04 15:29:53,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:29:53,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064532020] [2025-03-04 15:29:53,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064532020] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 15:29:53,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 15:29:53,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 15:29:53,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211373085] [2025-03-04 15:29:53,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 15:29:53,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 15:29:53,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:29:53,896 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 15:29:53,896 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-04 15:29:53,908 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2025-03-04 15:29:53,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 87 transitions, 775 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:53,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:29:53,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2025-03-04 15:29:53,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:29:54,238 INFO L124 PetriNetUnfolderBase]: 2095/4051 cut-off events. [2025-03-04 15:29:54,239 INFO L125 PetriNetUnfolderBase]: For 20596/20743 co-relation queries the response was YES. [2025-03-04 15:29:54,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17425 conditions, 4051 events. 2095/4051 cut-off events. For 20596/20743 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 24432 event pairs, 777 based on Foata normal form. 5/4049 useless extension candidates. Maximal degree in co-relation 17397. Up to 3328 conditions per place. [2025-03-04 15:29:54,257 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 74 selfloop transitions, 4 changer transitions 18/104 dead transitions. [2025-03-04 15:29:54,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 104 transitions, 1020 flow [2025-03-04 15:29:54,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 15:29:54,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-04 15:29:54,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2025-03-04 15:29:54,258 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2025-03-04 15:29:54,258 INFO L175 Difference]: Start difference. First operand has 98 places, 87 transitions, 775 flow. Second operand 6 states and 108 transitions. [2025-03-04 15:29:54,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 104 transitions, 1020 flow [2025-03-04 15:29:54,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 104 transitions, 990 flow, removed 11 selfloop flow, removed 3 redundant places. [2025-03-04 15:29:54,277 INFO L231 Difference]: Finished difference. Result has 101 places, 83 transitions, 721 flow [2025-03-04 15:29:54,278 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=721, PETRI_PLACES=101, PETRI_TRANSITIONS=83} [2025-03-04 15:29:54,278 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2025-03-04 15:29:54,278 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 83 transitions, 721 flow [2025-03-04 15:29:54,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:54,278 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:29:54,278 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:29:54,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2025-03-04 15:29:54,278 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2025-03-04 15:29:54,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:29:54,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1869038231, now seen corresponding path program 1 times [2025-03-04 15:29:54,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:29:54,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232422820] [2025-03-04 15:29:54,279 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:29:54,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:29:54,283 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-04 15:29:54,288 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-04 15:29:54,288 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:29:54,288 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:54,615 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:29:54,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:29:54,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232422820] [2025-03-04 15:29:54,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232422820] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:29:54,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213443994] [2025-03-04 15:29:54,615 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:29:54,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:29:54,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:29:54,617 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 15:29:54,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-04 15:29:54,659 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-04 15:29:54,674 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-04 15:29:54,674 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:29:54,674 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:54,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-04 15:29:54,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 15:29:54,992 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:29:54,992 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 15:29:55,193 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2025-03-04 15:29:55,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 42 [2025-03-04 15:29:55,449 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:29:55,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213443994] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 15:29:55,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 15:29:55,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2025-03-04 15:29:55,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556592136] [2025-03-04 15:29:55,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 15:29:55,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-04 15:29:55,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:29:55,450 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-04 15:29:55,451 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2025-03-04 15:29:55,616 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2025-03-04 15:29:55,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 83 transitions, 721 flow. Second operand has 38 states, 38 states have (on average 9.578947368421053) internal successors, (364), 38 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:55,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:29:55,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2025-03-04 15:29:55,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:29:57,538 INFO L124 PetriNetUnfolderBase]: 3597/6845 cut-off events. [2025-03-04 15:29:57,539 INFO L125 PetriNetUnfolderBase]: For 33934/33972 co-relation queries the response was YES. [2025-03-04 15:29:57,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28321 conditions, 6845 events. 3597/6845 cut-off events. For 33934/33972 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 46866 event pairs, 391 based on Foata normal form. 288/7131 useless extension candidates. Maximal degree in co-relation 28292. Up to 1745 conditions per place. [2025-03-04 15:29:57,620 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 403 selfloop transitions, 103 changer transitions 6/517 dead transitions. [2025-03-04 15:29:57,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 517 transitions, 4487 flow [2025-03-04 15:29:57,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-03-04 15:29:57,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2025-03-04 15:29:57,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 632 transitions. [2025-03-04 15:29:57,622 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34994462901439644 [2025-03-04 15:29:57,622 INFO L175 Difference]: Start difference. First operand has 101 places, 83 transitions, 721 flow. Second operand 42 states and 632 transitions. [2025-03-04 15:29:57,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 517 transitions, 4487 flow [2025-03-04 15:29:57,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 517 transitions, 4455 flow, removed 7 selfloop flow, removed 5 redundant places. [2025-03-04 15:29:57,661 INFO L231 Difference]: Finished difference. Result has 151 places, 175 transitions, 2212 flow [2025-03-04 15:29:57,661 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=2212, PETRI_PLACES=151, PETRI_TRANSITIONS=175} [2025-03-04 15:29:57,661 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2025-03-04 15:29:57,661 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 175 transitions, 2212 flow [2025-03-04 15:29:57,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 9.578947368421053) internal successors, (364), 38 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:57,661 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:29:57,662 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:29:57,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-04 15:29:57,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-04 15:29:57,862 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2025-03-04 15:29:57,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:29:57,863 INFO L85 PathProgramCache]: Analyzing trace with hash -898991721, now seen corresponding path program 2 times [2025-03-04 15:29:57,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:29:57,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047713754] [2025-03-04 15:29:57,863 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 15:29:57,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:29:57,867 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-04 15:29:57,874 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-04 15:29:57,874 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 15:29:57,874 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:29:58,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:29:58,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047713754] [2025-03-04 15:29:58,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047713754] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:29:58,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289744807] [2025-03-04 15:29:58,226 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 15:29:58,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:29:58,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:29:58,228 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 15:29:58,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-04 15:29:58,266 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-04 15:29:58,282 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-03-04 15:29:58,283 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 15:29:58,283 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:29:58,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-04 15:29:58,288 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 15:29:58,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-03-04 15:29:58,598 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-04 15:29:58,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2025-03-04 15:29:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:29:58,616 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 15:29:59,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2025-03-04 15:29:59,031 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2025-03-04 15:29:59,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 47 [2025-03-04 15:29:59,186 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:29:59,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289744807] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 15:29:59,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 15:29:59,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 37 [2025-03-04 15:29:59,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311235206] [2025-03-04 15:29:59,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 15:29:59,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-03-04 15:29:59,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:29:59,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-03-04 15:29:59,187 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1328, Unknown=0, NotChecked=0, Total=1482 [2025-03-04 15:29:59,340 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2025-03-04 15:29:59,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 175 transitions, 2212 flow. Second operand has 39 states, 39 states have (on average 9.564102564102564) internal successors, (373), 39 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:29:59,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:29:59,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2025-03-04 15:29:59,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:30:04,377 INFO L124 PetriNetUnfolderBase]: 6171/11676 cut-off events. [2025-03-04 15:30:04,377 INFO L125 PetriNetUnfolderBase]: For 117813/117925 co-relation queries the response was YES. [2025-03-04 15:30:04,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59232 conditions, 11676 events. 6171/11676 cut-off events. For 117813/117925 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 85396 event pairs, 1194 based on Foata normal form. 172/11847 useless extension candidates. Maximal degree in co-relation 59186. Up to 2180 conditions per place. [2025-03-04 15:30:04,441 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 609 selfloop transitions, 187 changer transitions 8/809 dead transitions. [2025-03-04 15:30:04,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 809 transitions, 9151 flow [2025-03-04 15:30:04,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2025-03-04 15:30:04,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2025-03-04 15:30:04,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 998 transitions. [2025-03-04 15:30:04,443 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3684016242155777 [2025-03-04 15:30:04,443 INFO L175 Difference]: Start difference. First operand has 151 places, 175 transitions, 2212 flow. Second operand 63 states and 998 transitions. [2025-03-04 15:30:04,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 809 transitions, 9151 flow [2025-03-04 15:30:04,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 809 transitions, 8442 flow, removed 333 selfloop flow, removed 9 redundant places. [2025-03-04 15:30:04,619 INFO L231 Difference]: Finished difference. Result has 232 places, 305 transitions, 4441 flow [2025-03-04 15:30:04,620 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1837, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=4441, PETRI_PLACES=232, PETRI_TRANSITIONS=305} [2025-03-04 15:30:04,620 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2025-03-04 15:30:04,620 INFO L471 AbstractCegarLoop]: Abstraction has has 232 places, 305 transitions, 4441 flow [2025-03-04 15:30:04,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 9.564102564102564) internal successors, (373), 39 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:30:04,620 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:30:04,620 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:30:04,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-04 15:30:04,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-03-04 15:30:04,821 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2025-03-04 15:30:04,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:30:04,822 INFO L85 PathProgramCache]: Analyzing trace with hash 2105610749, now seen corresponding path program 1 times [2025-03-04 15:30:04,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:30:04,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105394048] [2025-03-04 15:30:04,822 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:30:04,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:30:04,826 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-04 15:30:04,833 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-04 15:30:04,833 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:30:04,833 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:30:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:30:05,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:30:05,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105394048] [2025-03-04 15:30:05,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105394048] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:30:05,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823772959] [2025-03-04 15:30:05,374 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 15:30:05,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:30:05,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:30:05,376 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 15:30:05,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-04 15:30:05,425 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-04 15:30:05,442 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-04 15:30:05,442 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 15:30:05,442 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:30:05,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-04 15:30:05,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 15:30:05,833 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:30:05,833 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 15:30:06,048 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2025-03-04 15:30:06,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 41 [2025-03-04 15:30:06,346 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:30:06,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823772959] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 15:30:06,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 15:30:06,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 37 [2025-03-04 15:30:06,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806394820] [2025-03-04 15:30:06,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 15:30:06,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-03-04 15:30:06,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:30:06,347 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-03-04 15:30:06,348 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1226, Unknown=0, NotChecked=0, Total=1482 [2025-03-04 15:30:06,570 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2025-03-04 15:30:06,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 305 transitions, 4441 flow. Second operand has 39 states, 39 states have (on average 10.487179487179487) internal successors, (409), 39 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:30:06,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:30:06,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2025-03-04 15:30:06,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:30:13,979 INFO L124 PetriNetUnfolderBase]: 11499/23315 cut-off events. [2025-03-04 15:30:13,980 INFO L125 PetriNetUnfolderBase]: For 543320/544146 co-relation queries the response was YES. [2025-03-04 15:30:14,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144573 conditions, 23315 events. 11499/23315 cut-off events. For 543320/544146 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 210614 event pairs, 822 based on Foata normal form. 964/24146 useless extension candidates. Maximal degree in co-relation 144500. Up to 5362 conditions per place. [2025-03-04 15:30:14,285 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 975 selfloop transitions, 617 changer transitions 80/1702 dead transitions. [2025-03-04 15:30:14,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 1702 transitions, 23710 flow [2025-03-04 15:30:14,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2025-03-04 15:30:14,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2025-03-04 15:30:14,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 1742 transitions. [2025-03-04 15:30:14,290 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39717282261741904 [2025-03-04 15:30:14,290 INFO L175 Difference]: Start difference. First operand has 232 places, 305 transitions, 4441 flow. Second operand 102 states and 1742 transitions. [2025-03-04 15:30:14,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 1702 transitions, 23710 flow [2025-03-04 15:30:16,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 1702 transitions, 21437 flow, removed 1112 selfloop flow, removed 12 redundant places. [2025-03-04 15:30:16,227 INFO L231 Difference]: Finished difference. Result has 356 places, 840 transitions, 16384 flow [2025-03-04 15:30:16,227 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3673, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=102, PETRI_FLOW=16384, PETRI_PLACES=356, PETRI_TRANSITIONS=840} [2025-03-04 15:30:16,228 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2025-03-04 15:30:16,228 INFO L471 AbstractCegarLoop]: Abstraction has has 356 places, 840 transitions, 16384 flow [2025-03-04 15:30:16,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 10.487179487179487) internal successors, (409), 39 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:30:16,228 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:30:16,228 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:30:16,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-04 15:30:16,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:30:16,429 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2025-03-04 15:30:16,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:30:16,429 INFO L85 PathProgramCache]: Analyzing trace with hash -2098939139, now seen corresponding path program 2 times [2025-03-04 15:30:16,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:30:16,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88667341] [2025-03-04 15:30:16,429 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 15:30:16,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:30:16,435 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-04 15:30:16,442 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-04 15:30:16,442 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 15:30:16,442 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:30:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:30:16,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:30:16,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88667341] [2025-03-04 15:30:16,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88667341] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:30:16,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622111018] [2025-03-04 15:30:16,819 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 15:30:16,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:30:16,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:30:16,822 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 15:30:17,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-04 15:30:17,075 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-04 15:30:17,093 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-04 15:30:17,094 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 15:30:17,094 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:30:17,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-04 15:30:17,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 15:30:17,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-03-04 15:30:17,417 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2025-03-04 15:30:17,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 13 [2025-03-04 15:30:17,432 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:30:17,432 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 15:30:17,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 67 [2025-03-04 15:30:17,841 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2025-03-04 15:30:17,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 124 [2025-03-04 15:30:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 15:30:18,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622111018] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 15:30:18,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 15:30:18,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 37 [2025-03-04 15:30:18,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90739533] [2025-03-04 15:30:18,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 15:30:18,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-03-04 15:30:18,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:30:18,217 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-03-04 15:30:18,217 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2025-03-04 15:30:18,470 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2025-03-04 15:30:18,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 840 transitions, 16384 flow. Second operand has 39 states, 39 states have (on average 10.487179487179487) internal successors, (409), 39 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:30:18,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:30:18,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2025-03-04 15:30:18,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:30:31,581 INFO L124 PetriNetUnfolderBase]: 15402/31232 cut-off events. [2025-03-04 15:30:31,581 INFO L125 PetriNetUnfolderBase]: For 1034217/1035712 co-relation queries the response was YES. [2025-03-04 15:30:31,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215991 conditions, 31232 events. 15402/31232 cut-off events. For 1034217/1035712 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 288856 event pairs, 2624 based on Foata normal form. 916/31951 useless extension candidates. Maximal degree in co-relation 215883. Up to 10955 conditions per place. [2025-03-04 15:30:31,992 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 1340 selfloop transitions, 724 changer transitions 50/2144 dead transitions. [2025-03-04 15:30:31,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 2144 transitions, 44319 flow [2025-03-04 15:30:31,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2025-03-04 15:30:31,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2025-03-04 15:30:31,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 1546 transitions. [2025-03-04 15:30:31,995 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.390798786653185 [2025-03-04 15:30:31,995 INFO L175 Difference]: Start difference. First operand has 356 places, 840 transitions, 16384 flow. Second operand 92 states and 1546 transitions. [2025-03-04 15:30:31,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 2144 transitions, 44319 flow [2025-03-04 15:30:43,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 2144 transitions, 32161 flow, removed 6007 selfloop flow, removed 29 redundant places. [2025-03-04 15:30:43,457 INFO L231 Difference]: Finished difference. Result has 462 places, 1415 transitions, 26176 flow [2025-03-04 15:30:43,458 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10692, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=26176, PETRI_PLACES=462, PETRI_TRANSITIONS=1415} [2025-03-04 15:30:43,458 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 420 predicate places. [2025-03-04 15:30:43,459 INFO L471 AbstractCegarLoop]: Abstraction has has 462 places, 1415 transitions, 26176 flow [2025-03-04 15:30:43,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 10.487179487179487) internal successors, (409), 39 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:30:43,459 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 15:30:43,459 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 15:30:43,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-04 15:30:43,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:30:43,663 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2025-03-04 15:30:43,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 15:30:43,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1664942065, now seen corresponding path program 3 times [2025-03-04 15:30:43,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 15:30:43,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578591797] [2025-03-04 15:30:43,664 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 15:30:43,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 15:30:43,669 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 3 equivalence classes. [2025-03-04 15:30:43,680 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 27 statements. [2025-03-04 15:30:43,680 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 15:30:43,680 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:30:43,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 15:30:43,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 15:30:43,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578591797] [2025-03-04 15:30:43,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578591797] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 15:30:43,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130896553] [2025-03-04 15:30:43,828 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 15:30:43,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 15:30:43,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 15:30:43,829 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 15:30:43,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-04 15:30:43,875 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 3 equivalence classes. [2025-03-04 15:30:43,889 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 27 statements. [2025-03-04 15:30:43,889 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 15:30:43,889 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 15:30:43,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-04 15:30:43,891 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 15:30:43,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 15:30:43,967 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 15:30:44,055 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2025-03-04 15:30:44,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 37 [2025-03-04 15:30:44,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 15:30:44,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130896553] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 15:30:44,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 15:30:44,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2025-03-04 15:30:44,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731470677] [2025-03-04 15:30:44,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 15:30:44,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-04 15:30:44,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 15:30:44,069 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-04 15:30:44,069 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2025-03-04 15:30:44,115 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2025-03-04 15:30:44,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 1415 transitions, 26176 flow. Second operand has 19 states, 19 states have (on average 12.631578947368421) internal successors, (240), 19 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 15:30:44,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 15:30:44,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2025-03-04 15:30:44,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 15:30:55,760 INFO L124 PetriNetUnfolderBase]: 18131/36946 cut-off events. [2025-03-04 15:30:55,760 INFO L125 PetriNetUnfolderBase]: For 1453206/1454683 co-relation queries the response was YES. [2025-03-04 15:30:56,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252236 conditions, 36946 events. 18131/36946 cut-off events. For 1453206/1454683 co-relation queries the response was YES. Maximal size of possible extension queue 954. Compared 353615 event pairs, 2931 based on Foata normal form. 497/37191 useless extension candidates. Maximal degree in co-relation 252081. Up to 18530 conditions per place. [2025-03-04 15:30:56,734 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 1623 selfloop transitions, 524 changer transitions 16/2193 dead transitions. [2025-03-04 15:30:56,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 2193 transitions, 41049 flow [2025-03-04 15:30:56,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-03-04 15:30:56,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2025-03-04 15:30:56,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 754 transitions. [2025-03-04 15:30:56,736 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2025-03-04 15:30:56,736 INFO L175 Difference]: Start difference. First operand has 462 places, 1415 transitions, 26176 flow. Second operand 39 states and 754 transitions. [2025-03-04 15:30:56,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 2193 transitions, 41049 flow