./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed 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/chl-name-comparator-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e3298e0ac573b72ea1dd21021e341a1c4e9f42cf513c1ea24a79ab2c37c412bc --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 17:29:37,394 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 17:29:37,445 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 17:29:37,450 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 17:29:37,451 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 17:29:37,464 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 17:29:37,465 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 17:29:37,465 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 17:29:37,465 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 17:29:37,465 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 17:29:37,466 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 17:29:37,466 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 17:29:37,466 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 17:29:37,466 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 17:29:37,466 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 17:29:37,466 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 17:29:37,466 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 17:29:37,466 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 17:29:37,466 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 17:29:37,467 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 17:29:37,467 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 17:29:37,467 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 17:29:37,467 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 17:29:37,467 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 17:29:37,467 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 17:29:37,467 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 17:29:37,467 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 17:29:37,467 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 17:29:37,467 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 17:29:37,467 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 17:29:37,467 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 17:29:37,467 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 17:29:37,468 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:29:37,468 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 17:29:37,468 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 17:29:37,468 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 17:29:37,468 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 17:29:37,468 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 17:29:37,468 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 17:29:37,468 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 17:29:37,468 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 17:29:37,468 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 17:29:37,468 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 17:29:37,468 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 ! call(reach_error())) ) 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 -> e3298e0ac573b72ea1dd21021e341a1c4e9f42cf513c1ea24a79ab2c37c412bc [2025-03-08 17:29:37,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 17:29:37,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 17:29:37,698 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 17:29:37,699 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 17:29:37,700 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 17:29:37,701 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2025-03-08 17:29:38,837 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/366a4aed6/a406e17ef13b48588b6b3ebbc2b12f01/FLAG9f44ee259 [2025-03-08 17:29:39,070 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 17:29:39,074 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2025-03-08 17:29:39,080 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/366a4aed6/a406e17ef13b48588b6b3ebbc2b12f01/FLAG9f44ee259 [2025-03-08 17:29:39,419 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/366a4aed6/a406e17ef13b48588b6b3ebbc2b12f01 [2025-03-08 17:29:39,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 17:29:39,422 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 17:29:39,422 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 17:29:39,423 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 17:29:39,427 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 17:29:39,427 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:29:39" (1/1) ... [2025-03-08 17:29:39,428 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4478fc83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:39, skipping insertion in model container [2025-03-08 17:29:39,428 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:29:39" (1/1) ... [2025-03-08 17:29:39,438 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 17:29:39,581 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c[3882,3895] [2025-03-08 17:29:39,592 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:29:39,600 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 17:29:39,623 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c[3882,3895] [2025-03-08 17:29:39,628 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:29:39,643 INFO L204 MainTranslator]: Completed translation [2025-03-08 17:29:39,644 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:39 WrapperNode [2025-03-08 17:29:39,644 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 17:29:39,645 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 17:29:39,645 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 17:29:39,645 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 17:29:39,650 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:39" (1/1) ... [2025-03-08 17:29:39,656 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:39" (1/1) ... [2025-03-08 17:29:39,679 INFO L138 Inliner]: procedures = 24, calls = 24, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 214 [2025-03-08 17:29:39,681 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 17:29:39,681 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 17:29:39,682 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 17:29:39,682 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 17:29:39,687 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:39" (1/1) ... [2025-03-08 17:29:39,687 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:39" (1/1) ... [2025-03-08 17:29:39,690 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:39" (1/1) ... [2025-03-08 17:29:39,706 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 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]. [2025-03-08 17:29:39,706 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:39" (1/1) ... [2025-03-08 17:29:39,706 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:39" (1/1) ... [2025-03-08 17:29:39,710 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:39" (1/1) ... [2025-03-08 17:29:39,711 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:39" (1/1) ... [2025-03-08 17:29:39,712 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:39" (1/1) ... [2025-03-08 17:29:39,712 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:39" (1/1) ... [2025-03-08 17:29:39,715 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 17:29:39,716 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 17:29:39,716 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 17:29:39,716 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 17:29:39,717 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:39" (1/1) ... [2025-03-08 17:29:39,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:29:39,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:39,743 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) [2025-03-08 17:29:39,745 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 [2025-03-08 17:29:39,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 17:29:39,762 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-08 17:29:39,762 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-08 17:29:39,762 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-08 17:29:39,762 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-08 17:29:39,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 17:29:39,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 17:29:39,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 17:29:39,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 17:29:39,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-08 17:29:39,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 17:29:39,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 17:29:39,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 17:29:39,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 17:29:39,764 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-08 17:29:39,839 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 17:29:39,840 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 17:29:40,114 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 17:29:40,114 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 17:29:40,345 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 17:29:40,346 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 17:29:40,346 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:29:40 BoogieIcfgContainer [2025-03-08 17:29:40,346 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 17:29:40,348 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 17:29:40,348 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 17:29:40,351 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 17:29:40,351 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:29:39" (1/3) ... [2025-03-08 17:29:40,352 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f0985e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:29:40, skipping insertion in model container [2025-03-08 17:29:40,352 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:29:39" (2/3) ... [2025-03-08 17:29:40,352 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f0985e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:29:40, skipping insertion in model container [2025-03-08 17:29:40,352 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:29:40" (3/3) ... [2025-03-08 17:29:40,353 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2025-03-08 17:29:40,364 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 17:29:40,366 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-name-comparator-symm.wvr.c that has 3 procedures, 22 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-08 17:29:40,366 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 17:29:40,409 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-08 17:29:40,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 26 transitions, 66 flow [2025-03-08 17:29:40,459 INFO L124 PetriNetUnfolderBase]: 5/24 cut-off events. [2025-03-08 17:29:40,462 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-08 17:29:40,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 24 events. 5/24 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 24 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2025-03-08 17:29:40,468 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 26 transitions, 66 flow [2025-03-08 17:29:40,470 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 23 transitions, 58 flow [2025-03-08 17:29:40,476 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:29:40,484 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;@596ee279, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:29:40,484 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-08 17:29:40,491 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:29:40,491 INFO L124 PetriNetUnfolderBase]: 5/22 cut-off events. [2025-03-08 17:29:40,492 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-08 17:29:40,492 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:40,492 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:40,492 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:40,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:40,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1119953060, now seen corresponding path program 1 times [2025-03-08 17:29:40,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:40,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835099571] [2025-03-08 17:29:40,502 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:29:40,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:40,558 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-08 17:29:40,574 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-08 17:29:40,574 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:40,574 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:29:40,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:40,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835099571] [2025-03-08 17:29:40,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835099571] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:29:40,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:29:40,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 17:29:40,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582618781] [2025-03-08 17:29:40,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:40,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-08 17:29:40,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:40,673 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-08 17:29:40,673 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 17:29:40,674 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:29:40,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 58 flow. Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 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) [2025-03-08 17:29:40,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:40,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:29:40,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:40,740 INFO L124 PetriNetUnfolderBase]: 92/162 cut-off events. [2025-03-08 17:29:40,740 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-03-08 17:29:40,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 162 events. 92/162 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 388 event pairs, 68 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 300. Up to 162 conditions per place. [2025-03-08 17:29:40,745 INFO L140 encePairwiseOnDemand]: 24/26 looper letters, 20 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2025-03-08 17:29:40,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 21 transitions, 94 flow [2025-03-08 17:29:40,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-08 17:29:40,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-03-08 17:29:40,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 28 transitions. [2025-03-08 17:29:40,756 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2025-03-08 17:29:40,757 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 58 flow. Second operand 2 states and 28 transitions. [2025-03-08 17:29:40,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 21 transitions, 94 flow [2025-03-08 17:29:40,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 21 transitions, 86 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-08 17:29:40,762 INFO L231 Difference]: Finished difference. Result has 22 places, 21 transitions, 46 flow [2025-03-08 17:29:40,763 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=22, PETRI_TRANSITIONS=21} [2025-03-08 17:29:40,767 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, -3 predicate places. [2025-03-08 17:29:40,767 INFO L471 AbstractCegarLoop]: Abstraction has has 22 places, 21 transitions, 46 flow [2025-03-08 17:29:40,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 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) [2025-03-08 17:29:40,768 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:40,768 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:40,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 17:29:40,769 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:40,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:40,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1061376096, now seen corresponding path program 1 times [2025-03-08 17:29:40,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:40,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574455343] [2025-03-08 17:29:40,770 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:29:40,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:40,781 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 17:29:40,810 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:29:40,812 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:40,812 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:40,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:29:40,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:40,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574455343] [2025-03-08 17:29:40,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574455343] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:29:40,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:29:40,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 17:29:40,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626530937] [2025-03-08 17:29:40,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:40,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:29:40,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:40,940 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:29:40,940 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:29:40,940 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:29:40,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:40,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:40,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:29:40,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:41,012 INFO L124 PetriNetUnfolderBase]: 92/163 cut-off events. [2025-03-08 17:29:41,012 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-08 17:29:41,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 163 events. 92/163 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 391 event pairs, 68 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 331. Up to 162 conditions per place. [2025-03-08 17:29:41,014 INFO L140 encePairwiseOnDemand]: 23/26 looper letters, 19 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2025-03-08 17:29:41,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 22 transitions, 90 flow [2025-03-08 17:29:41,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:29:41,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:29:41,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 31 transitions. [2025-03-08 17:29:41,016 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3974358974358974 [2025-03-08 17:29:41,016 INFO L175 Difference]: Start difference. First operand has 22 places, 21 transitions, 46 flow. Second operand 3 states and 31 transitions. [2025-03-08 17:29:41,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 22 transitions, 90 flow [2025-03-08 17:29:41,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 22 transitions, 90 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-08 17:29:41,018 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 58 flow [2025-03-08 17:29:41,018 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2025-03-08 17:29:41,019 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 0 predicate places. [2025-03-08 17:29:41,019 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 58 flow [2025-03-08 17:29:41,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:41,019 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:41,019 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:41,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 17:29:41,019 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:41,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:41,020 INFO L85 PathProgramCache]: Analyzing trace with hash 549008271, now seen corresponding path program 1 times [2025-03-08 17:29:41,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:41,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150449236] [2025-03-08 17:29:41,020 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:29:41,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:41,031 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 17:29:41,052 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:29:41,052 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:41,052 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:29:41,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:41,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150449236] [2025-03-08 17:29:41,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150449236] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:41,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264633052] [2025-03-08 17:29:41,168 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:29:41,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:41,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:41,170 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) [2025-03-08 17:29:41,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 17:29:41,225 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-08 17:29:41,248 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-08 17:29:41,249 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:41,249 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:41,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-08 17:29:41,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:41,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:29:41,296 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:41,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:29:41,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264633052] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:41,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:41,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2025-03-08 17:29:41,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268805339] [2025-03-08 17:29:41,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:41,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 17:29:41,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:41,311 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 17:29:41,311 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-08 17:29:41,311 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:29:41,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 58 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:41,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:41,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:29:41,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:41,406 INFO L124 PetriNetUnfolderBase]: 92/165 cut-off events. [2025-03-08 17:29:41,407 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-08 17:29:41,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 165 events. 92/165 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 391 event pairs, 68 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 342. Up to 162 conditions per place. [2025-03-08 17:29:41,408 INFO L140 encePairwiseOnDemand]: 23/26 looper letters, 19 selfloop transitions, 4 changer transitions 0/24 dead transitions. [2025-03-08 17:29:41,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 24 transitions, 112 flow [2025-03-08 17:29:41,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:29:41,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:29:41,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 40 transitions. [2025-03-08 17:29:41,409 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3076923076923077 [2025-03-08 17:29:41,409 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 58 flow. Second operand 5 states and 40 transitions. [2025-03-08 17:29:41,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 24 transitions, 112 flow [2025-03-08 17:29:41,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 24 transitions, 108 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-08 17:29:41,410 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 80 flow [2025-03-08 17:29:41,410 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=80, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2025-03-08 17:29:41,411 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2025-03-08 17:29:41,411 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 80 flow [2025-03-08 17:29:41,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:41,411 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:41,411 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:41,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 17:29:41,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:41,616 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:41,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:41,617 INFO L85 PathProgramCache]: Analyzing trace with hash 322466223, now seen corresponding path program 2 times [2025-03-08 17:29:41,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:41,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360851414] [2025-03-08 17:29:41,618 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:29:41,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:41,627 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:29:41,646 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 18 of 21 statements. [2025-03-08 17:29:41,647 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-08 17:29:41,647 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:42,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:29:42,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:42,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360851414] [2025-03-08 17:29:42,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360851414] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:29:42,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:29:42,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-08 17:29:42,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071892848] [2025-03-08 17:29:42,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:42,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:29:42,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:42,034 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:29:42,034 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-08 17:29:42,034 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:29:42,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 80 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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) [2025-03-08 17:29:42,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:42,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:29:42,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:42,226 INFO L124 PetriNetUnfolderBase]: 222/403 cut-off events. [2025-03-08 17:29:42,227 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-03-08 17:29:42,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 834 conditions, 403 events. 222/403 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1534 event pairs, 68 based on Foata normal form. 1/343 useless extension candidates. Maximal degree in co-relation 827. Up to 173 conditions per place. [2025-03-08 17:29:42,229 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 44 selfloop transitions, 4 changer transitions 8/57 dead transitions. [2025-03-08 17:29:42,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 57 transitions, 265 flow [2025-03-08 17:29:42,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:29:42,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:29:42,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2025-03-08 17:29:42,230 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2025-03-08 17:29:42,230 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 80 flow. Second operand 5 states and 70 transitions. [2025-03-08 17:29:42,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 57 transitions, 265 flow [2025-03-08 17:29:42,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 57 transitions, 255 flow, removed 4 selfloop flow, removed 1 redundant places. [2025-03-08 17:29:42,236 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 99 flow [2025-03-08 17:29:42,236 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=99, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2025-03-08 17:29:42,236 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 11 predicate places. [2025-03-08 17:29:42,236 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 99 flow [2025-03-08 17:29:42,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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) [2025-03-08 17:29:42,236 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:42,236 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:42,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 17:29:42,237 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:42,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:42,237 INFO L85 PathProgramCache]: Analyzing trace with hash 739930327, now seen corresponding path program 3 times [2025-03-08 17:29:42,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:42,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118987624] [2025-03-08 17:29:42,237 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:29:42,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:42,246 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 3 equivalence classes. [2025-03-08 17:29:42,262 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 18 of 21 statements. [2025-03-08 17:29:42,264 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-08 17:29:42,264 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:29:42,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:42,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118987624] [2025-03-08 17:29:42,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118987624] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:29:42,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:29:42,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-08 17:29:42,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361337582] [2025-03-08 17:29:42,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:42,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:29:42,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:42,500 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:29:42,500 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-08 17:29:42,500 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:29:42,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 99 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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) [2025-03-08 17:29:42,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:42,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:29:42,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:42,703 INFO L124 PetriNetUnfolderBase]: 371/674 cut-off events. [2025-03-08 17:29:42,703 INFO L125 PetriNetUnfolderBase]: For 186/186 co-relation queries the response was YES. [2025-03-08 17:29:42,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1619 conditions, 674 events. 371/674 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2859 event pairs, 177 based on Foata normal form. 3/677 useless extension candidates. Maximal degree in co-relation 1608. Up to 384 conditions per place. [2025-03-08 17:29:42,708 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 45 selfloop transitions, 4 changer transitions 7/57 dead transitions. [2025-03-08 17:29:42,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 57 transitions, 308 flow [2025-03-08 17:29:42,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:29:42,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:29:42,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2025-03-08 17:29:42,709 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4846153846153846 [2025-03-08 17:29:42,709 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 99 flow. Second operand 5 states and 63 transitions. [2025-03-08 17:29:42,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 57 transitions, 308 flow [2025-03-08 17:29:42,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 57 transitions, 300 flow, removed 4 selfloop flow, removed 1 redundant places. [2025-03-08 17:29:42,712 INFO L231 Difference]: Finished difference. Result has 41 places, 29 transitions, 122 flow [2025-03-08 17:29:42,712 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=41, PETRI_TRANSITIONS=29} [2025-03-08 17:29:42,713 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 16 predicate places. [2025-03-08 17:29:42,713 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 29 transitions, 122 flow [2025-03-08 17:29:42,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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) [2025-03-08 17:29:42,713 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:42,713 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:42,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-08 17:29:42,714 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:42,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:42,714 INFO L85 PathProgramCache]: Analyzing trace with hash 2002308701, now seen corresponding path program 4 times [2025-03-08 17:29:42,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:42,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063516941] [2025-03-08 17:29:42,715 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:29:42,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:42,723 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:29:42,729 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:29:42,729 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:29:42,729 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:29:42,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:42,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063516941] [2025-03-08 17:29:42,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063516941] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:29:42,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:29:42,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-08 17:29:42,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509665093] [2025-03-08 17:29:42,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:42,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:29:42,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:42,975 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:29:42,975 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-08 17:29:42,975 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:29:42,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 29 transitions, 122 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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) [2025-03-08 17:29:42,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:42,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:29:42,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:43,189 INFO L124 PetriNetUnfolderBase]: 419/747 cut-off events. [2025-03-08 17:29:43,190 INFO L125 PetriNetUnfolderBase]: For 437/437 co-relation queries the response was YES. [2025-03-08 17:29:43,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1990 conditions, 747 events. 419/747 cut-off events. For 437/437 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3451 event pairs, 44 based on Foata normal form. 2/749 useless extension candidates. Maximal degree in co-relation 1976. Up to 560 conditions per place. [2025-03-08 17:29:43,193 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 43 selfloop transitions, 11 changer transitions 3/58 dead transitions. [2025-03-08 17:29:43,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 58 transitions, 335 flow [2025-03-08 17:29:43,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:29:43,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:29:43,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2025-03-08 17:29:43,194 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2025-03-08 17:29:43,194 INFO L175 Difference]: Start difference. First operand has 41 places, 29 transitions, 122 flow. Second operand 5 states and 61 transitions. [2025-03-08 17:29:43,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 58 transitions, 335 flow [2025-03-08 17:29:43,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 58 transitions, 325 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-03-08 17:29:43,197 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 214 flow [2025-03-08 17:29:43,197 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2025-03-08 17:29:43,198 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 20 predicate places. [2025-03-08 17:29:43,198 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 214 flow [2025-03-08 17:29:43,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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) [2025-03-08 17:29:43,198 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:43,198 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:43,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-08 17:29:43,198 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:43,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:43,199 INFO L85 PathProgramCache]: Analyzing trace with hash 769724021, now seen corresponding path program 5 times [2025-03-08 17:29:43,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:43,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001726638] [2025-03-08 17:29:43,199 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:29:43,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:43,207 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 3 equivalence classes. [2025-03-08 17:29:43,217 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:29:43,217 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-08 17:29:43,217 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:29:43,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:43,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001726638] [2025-03-08 17:29:43,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001726638] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:43,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149986370] [2025-03-08 17:29:43,500 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:29:43,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:43,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:43,504 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) [2025-03-08 17:29:43,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 17:29:43,554 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 3 equivalence classes. [2025-03-08 17:29:43,576 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:29:43,576 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-08 17:29:43,576 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:43,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-08 17:29:43,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:43,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:29:43,835 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 17:29:43,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149986370] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:29:43,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 17:29:43,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 10 [2025-03-08 17:29:43,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895021166] [2025-03-08 17:29:43,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:43,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:29:43,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:43,837 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:29:43,837 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2025-03-08 17:29:43,837 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:29:43,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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) [2025-03-08 17:29:43,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:43,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:29:43,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:44,047 INFO L124 PetriNetUnfolderBase]: 419/745 cut-off events. [2025-03-08 17:29:44,048 INFO L125 PetriNetUnfolderBase]: For 1022/1022 co-relation queries the response was YES. [2025-03-08 17:29:44,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2214 conditions, 745 events. 419/745 cut-off events. For 1022/1022 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3203 event pairs, 173 based on Foata normal form. 1/746 useless extension candidates. Maximal degree in co-relation 2198. Up to 393 conditions per place. [2025-03-08 17:29:44,053 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 51 selfloop transitions, 10 changer transitions 4/66 dead transitions. [2025-03-08 17:29:44,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 66 transitions, 447 flow [2025-03-08 17:29:44,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:29:44,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:29:44,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2025-03-08 17:29:44,057 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5076923076923077 [2025-03-08 17:29:44,057 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 214 flow. Second operand 5 states and 66 transitions. [2025-03-08 17:29:44,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 66 transitions, 447 flow [2025-03-08 17:29:44,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 66 transitions, 443 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-08 17:29:44,064 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 286 flow [2025-03-08 17:29:44,065 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2025-03-08 17:29:44,065 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 26 predicate places. [2025-03-08 17:29:44,065 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 286 flow [2025-03-08 17:29:44,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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) [2025-03-08 17:29:44,066 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:44,068 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:44,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-08 17:29:44,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-03-08 17:29:44,269 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:44,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:44,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1262467604, now seen corresponding path program 1 times [2025-03-08 17:29:44,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:44,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255466510] [2025-03-08 17:29:44,272 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:29:44,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:44,281 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 17:29:44,286 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:29:44,287 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:44,287 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:44,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:29:44,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:44,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255466510] [2025-03-08 17:29:44,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255466510] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:44,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978577278] [2025-03-08 17:29:44,357 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:29:44,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:44,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:44,359 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) [2025-03-08 17:29:44,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 17:29:44,410 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 17:29:44,429 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:29:44,430 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:44,430 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:44,431 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-08 17:29:44,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:44,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:29:44,493 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:44,537 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:29:44,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978577278] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:44,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-08 17:29:44,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2025-03-08 17:29:44,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068096705] [2025-03-08 17:29:44,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:44,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:29:44,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:44,538 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:29:44,538 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-08 17:29:44,538 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:29:44,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 286 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2025-03-08 17:29:44,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:44,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:29:44,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:44,695 INFO L124 PetriNetUnfolderBase]: 445/788 cut-off events. [2025-03-08 17:29:44,695 INFO L125 PetriNetUnfolderBase]: For 1567/1567 co-relation queries the response was YES. [2025-03-08 17:29:44,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2494 conditions, 788 events. 445/788 cut-off events. For 1567/1567 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3578 event pairs, 80 based on Foata normal form. 18/806 useless extension candidates. Maximal degree in co-relation 2475. Up to 362 conditions per place. [2025-03-08 17:29:44,700 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 59 selfloop transitions, 11 changer transitions 2/73 dead transitions. [2025-03-08 17:29:44,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 73 transitions, 538 flow [2025-03-08 17:29:44,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:29:44,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:29:44,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 68 transitions. [2025-03-08 17:29:44,701 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5230769230769231 [2025-03-08 17:29:44,701 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 286 flow. Second operand 5 states and 68 transitions. [2025-03-08 17:29:44,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 73 transitions, 538 flow [2025-03-08 17:29:44,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 73 transitions, 534 flow, removed 2 selfloop flow, removed 0 redundant places. [2025-03-08 17:29:44,705 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 319 flow [2025-03-08 17:29:44,705 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=319, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2025-03-08 17:29:44,706 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 31 predicate places. [2025-03-08 17:29:44,706 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 319 flow [2025-03-08 17:29:44,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2025-03-08 17:29:44,706 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:44,706 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:44,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 17:29:44,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:44,911 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:44,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:44,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1349997964, now seen corresponding path program 1 times [2025-03-08 17:29:44,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:44,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645136654] [2025-03-08 17:29:44,912 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:29:44,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:44,923 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 17:29:44,928 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:29:44,928 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:44,928 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:29:45,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:45,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645136654] [2025-03-08 17:29:45,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645136654] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:45,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712258551] [2025-03-08 17:29:45,001 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:29:45,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:45,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:45,006 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) [2025-03-08 17:29:45,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 17:29:45,062 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 17:29:45,083 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:29:45,084 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:45,084 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:45,085 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-08 17:29:45,086 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:45,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:29:45,141 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:29:45,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712258551] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:45,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-08 17:29:45,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2025-03-08 17:29:45,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062181559] [2025-03-08 17:29:45,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:45,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:29:45,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:45,180 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:29:45,180 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-08 17:29:45,180 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:29:45,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 319 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2025-03-08 17:29:45,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:45,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:29:45,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:45,334 INFO L124 PetriNetUnfolderBase]: 481/848 cut-off events. [2025-03-08 17:29:45,334 INFO L125 PetriNetUnfolderBase]: For 2013/2013 co-relation queries the response was YES. [2025-03-08 17:29:45,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2781 conditions, 848 events. 481/848 cut-off events. For 2013/2013 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3803 event pairs, 92 based on Foata normal form. 8/856 useless extension candidates. Maximal degree in co-relation 2760. Up to 383 conditions per place. [2025-03-08 17:29:45,339 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 57 selfloop transitions, 10 changer transitions 1/69 dead transitions. [2025-03-08 17:29:45,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 69 transitions, 559 flow [2025-03-08 17:29:45,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:29:45,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:29:45,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2025-03-08 17:29:45,340 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49230769230769234 [2025-03-08 17:29:45,340 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 319 flow. Second operand 5 states and 64 transitions. [2025-03-08 17:29:45,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 69 transitions, 559 flow [2025-03-08 17:29:45,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 69 transitions, 534 flow, removed 1 selfloop flow, removed 3 redundant places. [2025-03-08 17:29:45,346 INFO L231 Difference]: Finished difference. Result has 59 places, 45 transitions, 353 flow [2025-03-08 17:29:45,346 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=353, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2025-03-08 17:29:45,347 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 34 predicate places. [2025-03-08 17:29:45,347 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 353 flow [2025-03-08 17:29:45,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2025-03-08 17:29:45,347 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:45,347 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:45,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-08 17:29:45,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:45,548 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:45,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:45,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1245764488, now seen corresponding path program 2 times [2025-03-08 17:29:45,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:45,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068221171] [2025-03-08 17:29:45,549 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:29:45,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:45,557 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-08 17:29:45,566 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:29:45,566 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:29:45,566 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:29:45,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:45,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068221171] [2025-03-08 17:29:45,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068221171] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:29:45,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:29:45,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:29:45,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142526083] [2025-03-08 17:29:45,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:45,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:29:45,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:45,634 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:29:45,634 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 17:29:45,634 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:29:45,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 353 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2025-03-08 17:29:45,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:45,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:29:45,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:45,801 INFO L124 PetriNetUnfolderBase]: 470/822 cut-off events. [2025-03-08 17:29:45,801 INFO L125 PetriNetUnfolderBase]: For 2493/2493 co-relation queries the response was YES. [2025-03-08 17:29:45,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2799 conditions, 822 events. 470/822 cut-off events. For 2493/2493 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3705 event pairs, 210 based on Foata normal form. 3/825 useless extension candidates. Maximal degree in co-relation 2777. Up to 431 conditions per place. [2025-03-08 17:29:45,806 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 52 selfloop transitions, 11 changer transitions 10/74 dead transitions. [2025-03-08 17:29:45,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 74 transitions, 621 flow [2025-03-08 17:29:45,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:29:45,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:29:45,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2025-03-08 17:29:45,808 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-03-08 17:29:45,808 INFO L175 Difference]: Start difference. First operand has 59 places, 45 transitions, 353 flow. Second operand 5 states and 65 transitions. [2025-03-08 17:29:45,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 74 transitions, 621 flow [2025-03-08 17:29:45,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 74 transitions, 601 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-03-08 17:29:45,814 INFO L231 Difference]: Finished difference. Result has 64 places, 46 transitions, 384 flow [2025-03-08 17:29:45,815 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=384, PETRI_PLACES=64, PETRI_TRANSITIONS=46} [2025-03-08 17:29:45,816 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 39 predicate places. [2025-03-08 17:29:45,816 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 46 transitions, 384 flow [2025-03-08 17:29:45,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2025-03-08 17:29:45,816 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:45,816 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:45,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-08 17:29:45,816 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:45,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:45,817 INFO L85 PathProgramCache]: Analyzing trace with hash 896399664, now seen corresponding path program 2 times [2025-03-08 17:29:45,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:45,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336683039] [2025-03-08 17:29:45,817 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:29:45,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:45,824 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-08 17:29:45,829 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 20 of 23 statements. [2025-03-08 17:29:45,829 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-08 17:29:45,829 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:29:45,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:45,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336683039] [2025-03-08 17:29:45,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336683039] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:29:45,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:29:45,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:29:45,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842631598] [2025-03-08 17:29:45,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:45,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:29:45,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:45,895 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:29:45,895 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 17:29:45,895 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:29:45,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 46 transitions, 384 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2025-03-08 17:29:45,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:45,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:29:45,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:46,075 INFO L124 PetriNetUnfolderBase]: 505/883 cut-off events. [2025-03-08 17:29:46,075 INFO L125 PetriNetUnfolderBase]: For 2850/2850 co-relation queries the response was YES. [2025-03-08 17:29:46,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3137 conditions, 883 events. 505/883 cut-off events. For 2850/2850 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4014 event pairs, 213 based on Foata normal form. 9/892 useless extension candidates. Maximal degree in co-relation 3112. Up to 432 conditions per place. [2025-03-08 17:29:46,080 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 58 selfloop transitions, 13 changer transitions 2/74 dead transitions. [2025-03-08 17:29:46,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 74 transitions, 626 flow [2025-03-08 17:29:46,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:29:46,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:29:46,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2025-03-08 17:29:46,081 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2025-03-08 17:29:46,081 INFO L175 Difference]: Start difference. First operand has 64 places, 46 transitions, 384 flow. Second operand 5 states and 70 transitions. [2025-03-08 17:29:46,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 74 transitions, 626 flow [2025-03-08 17:29:46,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 74 transitions, 602 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-03-08 17:29:46,088 INFO L231 Difference]: Finished difference. Result has 65 places, 47 transitions, 412 flow [2025-03-08 17:29:46,088 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=412, PETRI_PLACES=65, PETRI_TRANSITIONS=47} [2025-03-08 17:29:46,088 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 40 predicate places. [2025-03-08 17:29:46,089 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 47 transitions, 412 flow [2025-03-08 17:29:46,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2025-03-08 17:29:46,089 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:46,089 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:46,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-08 17:29:46,089 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:46,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:46,089 INFO L85 PathProgramCache]: Analyzing trace with hash -2041870274, now seen corresponding path program 3 times [2025-03-08 17:29:46,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:46,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472875441] [2025-03-08 17:29:46,090 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:29:46,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:46,096 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 3 equivalence classes. [2025-03-08 17:29:46,108 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 22 of 23 statements. [2025-03-08 17:29:46,111 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:29:46,111 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:29:46,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:46,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472875441] [2025-03-08 17:29:46,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472875441] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:29:46,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:29:46,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:29:46,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040882805] [2025-03-08 17:29:46,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:46,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:29:46,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:46,179 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:29:46,179 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 17:29:46,180 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:29:46,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 47 transitions, 412 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2025-03-08 17:29:46,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:46,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:29:46,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:46,346 INFO L124 PetriNetUnfolderBase]: 499/865 cut-off events. [2025-03-08 17:29:46,347 INFO L125 PetriNetUnfolderBase]: For 3001/3001 co-relation queries the response was YES. [2025-03-08 17:29:46,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3102 conditions, 865 events. 499/865 cut-off events. For 3001/3001 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3891 event pairs, 239 based on Foata normal form. 2/867 useless extension candidates. Maximal degree in co-relation 3078. Up to 495 conditions per place. [2025-03-08 17:29:46,352 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 48 selfloop transitions, 11 changer transitions 6/66 dead transitions. [2025-03-08 17:29:46,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 66 transitions, 577 flow [2025-03-08 17:29:46,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:29:46,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:29:46,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2025-03-08 17:29:46,353 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47692307692307695 [2025-03-08 17:29:46,354 INFO L175 Difference]: Start difference. First operand has 65 places, 47 transitions, 412 flow. Second operand 5 states and 62 transitions. [2025-03-08 17:29:46,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 66 transitions, 577 flow [2025-03-08 17:29:46,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 564 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-03-08 17:29:46,360 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 396 flow [2025-03-08 17:29:46,360 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=396, PETRI_PLACES=68, PETRI_TRANSITIONS=45} [2025-03-08 17:29:46,362 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 43 predicate places. [2025-03-08 17:29:46,362 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 396 flow [2025-03-08 17:29:46,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2025-03-08 17:29:46,362 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:46,362 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:46,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-08 17:29:46,363 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:46,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:46,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1766336772, now seen corresponding path program 3 times [2025-03-08 17:29:46,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:46,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144162236] [2025-03-08 17:29:46,363 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:29:46,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:46,374 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 3 equivalence classes. [2025-03-08 17:29:46,387 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 22 of 23 statements. [2025-03-08 17:29:46,388 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:29:46,388 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:29:46,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:46,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144162236] [2025-03-08 17:29:46,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144162236] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:29:46,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:29:46,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:29:46,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912001461] [2025-03-08 17:29:46,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:46,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:29:46,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:46,469 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:29:46,469 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 17:29:46,469 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:29:46,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 45 transitions, 396 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2025-03-08 17:29:46,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:46,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:29:46,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:46,643 INFO L124 PetriNetUnfolderBase]: 489/849 cut-off events. [2025-03-08 17:29:46,643 INFO L125 PetriNetUnfolderBase]: For 3177/3177 co-relation queries the response was YES. [2025-03-08 17:29:46,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3037 conditions, 849 events. 489/849 cut-off events. For 3177/3177 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3737 event pairs, 232 based on Foata normal form. 3/852 useless extension candidates. Maximal degree in co-relation 3013. Up to 443 conditions per place. [2025-03-08 17:29:46,648 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 47 selfloop transitions, 12 changer transitions 7/67 dead transitions. [2025-03-08 17:29:46,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 67 transitions, 606 flow [2025-03-08 17:29:46,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:29:46,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:29:46,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2025-03-08 17:29:46,648 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49230769230769234 [2025-03-08 17:29:46,648 INFO L175 Difference]: Start difference. First operand has 68 places, 45 transitions, 396 flow. Second operand 5 states and 64 transitions. [2025-03-08 17:29:46,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 67 transitions, 606 flow [2025-03-08 17:29:46,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 582 flow, removed 1 selfloop flow, removed 3 redundant places. [2025-03-08 17:29:46,653 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 402 flow [2025-03-08 17:29:46,653 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=402, PETRI_PLACES=68, PETRI_TRANSITIONS=45} [2025-03-08 17:29:46,654 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 43 predicate places. [2025-03-08 17:29:46,654 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 402 flow [2025-03-08 17:29:46,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2025-03-08 17:29:46,654 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:46,654 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:46,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-03-08 17:29:46,654 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:46,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:46,655 INFO L85 PathProgramCache]: Analyzing trace with hash -2135205098, now seen corresponding path program 4 times [2025-03-08 17:29:46,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:46,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594497917] [2025-03-08 17:29:46,655 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:29:46,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:46,661 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-03-08 17:29:46,670 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:29:46,670 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:29:46,670 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:29:46,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:46,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594497917] [2025-03-08 17:29:46,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594497917] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:29:46,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:29:46,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:29:46,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149961221] [2025-03-08 17:29:46,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:46,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:29:46,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:46,750 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:29:46,750 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 17:29:46,751 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:29:46,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 45 transitions, 402 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2025-03-08 17:29:46,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:46,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:29:46,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:46,907 INFO L124 PetriNetUnfolderBase]: 460/792 cut-off events. [2025-03-08 17:29:46,907 INFO L125 PetriNetUnfolderBase]: For 3164/3164 co-relation queries the response was YES. [2025-03-08 17:29:46,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2847 conditions, 792 events. 460/792 cut-off events. For 3164/3164 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3394 event pairs, 195 based on Foata normal form. 8/800 useless extension candidates. Maximal degree in co-relation 2822. Up to 355 conditions per place. [2025-03-08 17:29:46,912 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 51 selfloop transitions, 13 changer transitions 3/68 dead transitions. [2025-03-08 17:29:46,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 68 transitions, 610 flow [2025-03-08 17:29:46,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:29:46,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:29:46,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2025-03-08 17:29:46,913 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-03-08 17:29:46,913 INFO L175 Difference]: Start difference. First operand has 68 places, 45 transitions, 402 flow. Second operand 5 states and 65 transitions. [2025-03-08 17:29:46,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 68 transitions, 610 flow [2025-03-08 17:29:46,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 68 transitions, 580 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-03-08 17:29:46,921 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 402 flow [2025-03-08 17:29:46,921 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=402, PETRI_PLACES=68, PETRI_TRANSITIONS=45} [2025-03-08 17:29:46,922 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 43 predicate places. [2025-03-08 17:29:46,922 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 402 flow [2025-03-08 17:29:46,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2025-03-08 17:29:46,922 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:46,922 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:46,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-03-08 17:29:46,922 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:46,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:46,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1668721556, now seen corresponding path program 4 times [2025-03-08 17:29:46,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:46,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643319442] [2025-03-08 17:29:46,923 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:29:46,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:46,930 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-03-08 17:29:46,935 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:29:46,936 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:29:46,936 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:47,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:29:47,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:47,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643319442] [2025-03-08 17:29:47,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643319442] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:47,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134428735] [2025-03-08 17:29:47,006 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:29:47,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:47,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:47,008 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) [2025-03-08 17:29:47,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 17:29:47,065 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-03-08 17:29:47,086 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:29:47,086 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:29:47,086 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:47,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-08 17:29:47,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:47,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:29:47,158 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:47,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:29:47,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134428735] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:47,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-08 17:29:47,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2025-03-08 17:29:47,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670902545] [2025-03-08 17:29:47,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:47,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:29:47,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:47,213 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:29:47,213 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2025-03-08 17:29:47,213 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:29:47,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 45 transitions, 402 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2025-03-08 17:29:47,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:47,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:29:47,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:47,360 INFO L124 PetriNetUnfolderBase]: 448/775 cut-off events. [2025-03-08 17:29:47,361 INFO L125 PetriNetUnfolderBase]: For 3020/3020 co-relation queries the response was YES. [2025-03-08 17:29:47,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2750 conditions, 775 events. 448/775 cut-off events. For 3020/3020 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3317 event pairs, 191 based on Foata normal form. 9/784 useless extension candidates. Maximal degree in co-relation 2725. Up to 405 conditions per place. [2025-03-08 17:29:47,365 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 52 selfloop transitions, 13 changer transitions 3/69 dead transitions. [2025-03-08 17:29:47,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 69 transitions, 624 flow [2025-03-08 17:29:47,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:29:47,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:29:47,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2025-03-08 17:29:47,366 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5076923076923077 [2025-03-08 17:29:47,366 INFO L175 Difference]: Start difference. First operand has 68 places, 45 transitions, 402 flow. Second operand 5 states and 66 transitions. [2025-03-08 17:29:47,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 69 transitions, 624 flow [2025-03-08 17:29:47,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 69 transitions, 576 flow, removed 4 selfloop flow, removed 6 redundant places. [2025-03-08 17:29:47,371 INFO L231 Difference]: Finished difference. Result has 65 places, 45 transitions, 383 flow [2025-03-08 17:29:47,372 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=383, PETRI_PLACES=65, PETRI_TRANSITIONS=45} [2025-03-08 17:29:47,372 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 40 predicate places. [2025-03-08 17:29:47,373 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 45 transitions, 383 flow [2025-03-08 17:29:47,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2025-03-08 17:29:47,373 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:47,373 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:47,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 17:29:47,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-08 17:29:47,577 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:47,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:47,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1038475130, now seen corresponding path program 5 times [2025-03-08 17:29:47,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:47,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720430342] [2025-03-08 17:29:47,578 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:29:47,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:47,586 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 3 equivalence classes. [2025-03-08 17:29:47,606 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:29:47,606 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-08 17:29:47,606 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:47,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:29:47,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:47,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720430342] [2025-03-08 17:29:47,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720430342] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:47,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408609820] [2025-03-08 17:29:47,729 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:29:47,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:47,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:47,731 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) [2025-03-08 17:29:47,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 17:29:47,786 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 3 equivalence classes. [2025-03-08 17:29:47,809 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:29:47,809 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-08 17:29:47,809 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:47,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 17:29:47,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:47,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:29:47,889 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 17:29:47,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408609820] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:29:47,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 17:29:47,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2025-03-08 17:29:47,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408619316] [2025-03-08 17:29:47,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:47,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:29:47,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:47,890 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:29:47,890 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2025-03-08 17:29:47,890 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:29:47,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 45 transitions, 383 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2025-03-08 17:29:47,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:47,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:29:47,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:48,058 INFO L124 PetriNetUnfolderBase]: 441/754 cut-off events. [2025-03-08 17:29:48,058 INFO L125 PetriNetUnfolderBase]: For 2414/2414 co-relation queries the response was YES. [2025-03-08 17:29:48,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2611 conditions, 754 events. 441/754 cut-off events. For 2414/2414 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3188 event pairs, 187 based on Foata normal form. 2/756 useless extension candidates. Maximal degree in co-relation 2588. Up to 405 conditions per place. [2025-03-08 17:29:48,062 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 45 selfloop transitions, 11 changer transitions 6/63 dead transitions. [2025-03-08 17:29:48,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 555 flow [2025-03-08 17:29:48,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:29:48,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:29:48,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2025-03-08 17:29:48,063 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2025-03-08 17:29:48,063 INFO L175 Difference]: Start difference. First operand has 65 places, 45 transitions, 383 flow. Second operand 5 states and 59 transitions. [2025-03-08 17:29:48,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 555 flow [2025-03-08 17:29:48,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 63 transitions, 505 flow, removed 5 selfloop flow, removed 6 redundant places. [2025-03-08 17:29:48,068 INFO L231 Difference]: Finished difference. Result has 63 places, 43 transitions, 337 flow [2025-03-08 17:29:48,068 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=337, PETRI_PLACES=63, PETRI_TRANSITIONS=43} [2025-03-08 17:29:48,068 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 38 predicate places. [2025-03-08 17:29:48,068 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 43 transitions, 337 flow [2025-03-08 17:29:48,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2025-03-08 17:29:48,069 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:48,069 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:48,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-08 17:29:48,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-08 17:29:48,273 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:48,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:48,274 INFO L85 PathProgramCache]: Analyzing trace with hash -656545109, now seen corresponding path program 1 times [2025-03-08 17:29:48,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:48,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642192901] [2025-03-08 17:29:48,274 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:29:48,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:48,280 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-08 17:29:48,296 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 17:29:48,297 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:48,297 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:29:49,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:49,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642192901] [2025-03-08 17:29:49,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642192901] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:49,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726377688] [2025-03-08 17:29:49,014 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:29:49,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:49,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:49,016 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) [2025-03-08 17:29:49,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 17:29:49,072 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-08 17:29:49,092 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 17:29:49,093 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:29:49,093 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:49,094 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-08 17:29:49,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:49,454 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 162 treesize of output 106 [2025-03-08 17:29:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:29:49,620 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:50,799 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:29:50,800 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 237 treesize of output 149 [2025-03-08 17:29:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:29:50,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726377688] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:50,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:50,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2025-03-08 17:29:50,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749396100] [2025-03-08 17:29:50,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:50,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 17:29:50,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:50,958 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 17:29:50,959 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2025-03-08 17:29:50,959 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:29:50,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 43 transitions, 337 flow. Second operand has 21 states, 21 states have (on average 5.809523809523809) internal successors, (122), 21 states have internal predecessors, (122), 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) [2025-03-08 17:29:50,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:50,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:29:50,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:54,472 INFO L124 PetriNetUnfolderBase]: 1142/2012 cut-off events. [2025-03-08 17:29:54,472 INFO L125 PetriNetUnfolderBase]: For 3845/3845 co-relation queries the response was YES. [2025-03-08 17:29:54,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6278 conditions, 2012 events. 1142/2012 cut-off events. For 3845/3845 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10755 event pairs, 172 based on Foata normal form. 9/2021 useless extension candidates. Maximal degree in co-relation 6257. Up to 357 conditions per place. [2025-03-08 17:29:54,482 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 187 selfloop transitions, 58 changer transitions 35/281 dead transitions. [2025-03-08 17:29:54,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 281 transitions, 1896 flow [2025-03-08 17:29:54,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-03-08 17:29:54,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2025-03-08 17:29:54,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 351 transitions. [2025-03-08 17:29:54,485 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2025-03-08 17:29:54,485 INFO L175 Difference]: Start difference. First operand has 63 places, 43 transitions, 337 flow. Second operand 33 states and 351 transitions. [2025-03-08 17:29:54,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 281 transitions, 1896 flow [2025-03-08 17:29:54,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 281 transitions, 1824 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-08 17:29:54,495 INFO L231 Difference]: Finished difference. Result has 99 places, 98 transitions, 933 flow [2025-03-08 17:29:54,496 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=933, PETRI_PLACES=99, PETRI_TRANSITIONS=98} [2025-03-08 17:29:54,496 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 74 predicate places. [2025-03-08 17:29:54,496 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 98 transitions, 933 flow [2025-03-08 17:29:54,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.809523809523809) internal successors, (122), 21 states have internal predecessors, (122), 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) [2025-03-08 17:29:54,497 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:54,497 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:54,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-08 17:29:54,701 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:54,701 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:54,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:54,702 INFO L85 PathProgramCache]: Analyzing trace with hash -2084032805, now seen corresponding path program 2 times [2025-03-08 17:29:54,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:54,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753750065] [2025-03-08 17:29:54,702 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:29:54,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:54,708 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-08 17:29:54,729 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 17:29:54,729 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:29:54,729 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:55,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:29:55,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:55,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753750065] [2025-03-08 17:29:55,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753750065] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:29:55,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024962227] [2025-03-08 17:29:55,258 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:29:55,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:29:55,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:29:55,260 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) [2025-03-08 17:29:55,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 17:29:55,316 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-08 17:29:55,337 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 17:29:55,338 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:29:55,338 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:55,339 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-08 17:29:55,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:29:55,712 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 131 treesize of output 83 [2025-03-08 17:29:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:29:55,790 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:29:56,636 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:29:56,636 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 398 treesize of output 246 [2025-03-08 17:29:57,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:29:57,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024962227] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:29:57,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:29:57,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2025-03-08 17:29:57,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510636287] [2025-03-08 17:29:57,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:29:57,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 17:29:57,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:57,060 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 17:29:57,060 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2025-03-08 17:29:57,060 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:29:57,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 98 transitions, 933 flow. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 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) [2025-03-08 17:29:57,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:57,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:29:57,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:58,317 INFO L124 PetriNetUnfolderBase]: 1335/2393 cut-off events. [2025-03-08 17:29:58,317 INFO L125 PetriNetUnfolderBase]: For 7850/7850 co-relation queries the response was YES. [2025-03-08 17:29:58,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8526 conditions, 2393 events. 1335/2393 cut-off events. For 7850/7850 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13476 event pairs, 494 based on Foata normal form. 5/2398 useless extension candidates. Maximal degree in co-relation 8495. Up to 1104 conditions per place. [2025-03-08 17:29:58,331 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 120 selfloop transitions, 68 changer transitions 20/209 dead transitions. [2025-03-08 17:29:58,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 209 transitions, 1899 flow [2025-03-08 17:29:58,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 17:29:58,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-08 17:29:58,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 190 transitions. [2025-03-08 17:29:58,332 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2025-03-08 17:29:58,332 INFO L175 Difference]: Start difference. First operand has 99 places, 98 transitions, 933 flow. Second operand 19 states and 190 transitions. [2025-03-08 17:29:58,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 209 transitions, 1899 flow [2025-03-08 17:29:58,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 209 transitions, 1663 flow, removed 100 selfloop flow, removed 9 redundant places. [2025-03-08 17:29:58,354 INFO L231 Difference]: Finished difference. Result has 111 places, 128 transitions, 1218 flow [2025-03-08 17:29:58,354 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=781, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1218, PETRI_PLACES=111, PETRI_TRANSITIONS=128} [2025-03-08 17:29:58,354 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 86 predicate places. [2025-03-08 17:29:58,354 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 128 transitions, 1218 flow [2025-03-08 17:29:58,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 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) [2025-03-08 17:29:58,354 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:58,354 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:58,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-08 17:29:58,558 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,SelfDestructingSolverStorable17 [2025-03-08 17:29:58,559 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:58,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:58,559 INFO L85 PathProgramCache]: Analyzing trace with hash 763952195, now seen corresponding path program 3 times [2025-03-08 17:29:58,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:58,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841870572] [2025-03-08 17:29:58,559 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:29:58,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:58,566 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 3 equivalence classes. [2025-03-08 17:29:58,579 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 22 of 25 statements. [2025-03-08 17:29:58,580 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-08 17:29:58,580 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:29:59,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:29:59,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:29:59,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841870572] [2025-03-08 17:29:59,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841870572] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:29:59,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:29:59,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-08 17:29:59,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865810003] [2025-03-08 17:29:59,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:29:59,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 17:29:59,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:29:59,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 17:29:59,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2025-03-08 17:29:59,115 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:29:59,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 128 transitions, 1218 flow. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:59,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:29:59,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:29:59,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:29:59,539 INFO L124 PetriNetUnfolderBase]: 1408/2522 cut-off events. [2025-03-08 17:29:59,539 INFO L125 PetriNetUnfolderBase]: For 12862/12862 co-relation queries the response was YES. [2025-03-08 17:29:59,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9249 conditions, 2522 events. 1408/2522 cut-off events. For 12862/12862 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14511 event pairs, 827 based on Foata normal form. 1/2523 useless extension candidates. Maximal degree in co-relation 9218. Up to 1942 conditions per place. [2025-03-08 17:29:59,556 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 136 selfloop transitions, 29 changer transitions 9/175 dead transitions. [2025-03-08 17:29:59,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 175 transitions, 1797 flow [2025-03-08 17:29:59,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 17:29:59,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-08 17:29:59,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2025-03-08 17:29:59,559 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38076923076923075 [2025-03-08 17:29:59,559 INFO L175 Difference]: Start difference. First operand has 111 places, 128 transitions, 1218 flow. Second operand 10 states and 99 transitions. [2025-03-08 17:29:59,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 175 transitions, 1797 flow [2025-03-08 17:29:59,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 175 transitions, 1686 flow, removed 40 selfloop flow, removed 6 redundant places. [2025-03-08 17:29:59,587 INFO L231 Difference]: Finished difference. Result has 116 places, 139 transitions, 1314 flow [2025-03-08 17:29:59,588 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1314, PETRI_PLACES=116, PETRI_TRANSITIONS=139} [2025-03-08 17:29:59,588 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 91 predicate places. [2025-03-08 17:29:59,588 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 139 transitions, 1314 flow [2025-03-08 17:29:59,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:29:59,589 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:29:59,589 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:29:59,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-03-08 17:29:59,589 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:29:59,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:29:59,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1770962161, now seen corresponding path program 4 times [2025-03-08 17:29:59,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:29:59,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904731264] [2025-03-08 17:29:59,590 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:29:59,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:29:59,596 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-03-08 17:29:59,613 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 17:29:59,614 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:29:59,614 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:00,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:00,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904731264] [2025-03-08 17:30:00,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904731264] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:00,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239562470] [2025-03-08 17:30:00,034 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:30:00,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:00,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:00,036 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) [2025-03-08 17:30:00,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 17:30:00,094 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-03-08 17:30:00,117 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 17:30:00,118 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:30:00,118 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:00,119 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-08 17:30:00,121 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:00,333 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 143 treesize of output 95 [2025-03-08 17:30:00,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:00,515 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:01,580 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:01,580 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 394 treesize of output 250 [2025-03-08 17:30:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:02,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239562470] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:02,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:02,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2025-03-08 17:30:02,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481560194] [2025-03-08 17:30:02,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:02,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 17:30:02,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:02,155 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 17:30:02,155 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2025-03-08 17:30:02,155 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:30:02,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 139 transitions, 1314 flow. Second operand has 22 states, 22 states have (on average 5.7272727272727275) internal successors, (126), 22 states have internal predecessors, (126), 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) [2025-03-08 17:30:02,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:02,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:30:02,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:03,791 INFO L124 PetriNetUnfolderBase]: 1555/2813 cut-off events. [2025-03-08 17:30:03,791 INFO L125 PetriNetUnfolderBase]: For 16728/16728 co-relation queries the response was YES. [2025-03-08 17:30:03,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11111 conditions, 2813 events. 1555/2813 cut-off events. For 16728/16728 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 16509 event pairs, 501 based on Foata normal form. 9/2822 useless extension candidates. Maximal degree in co-relation 11077. Up to 1147 conditions per place. [2025-03-08 17:30:03,803 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 154 selfloop transitions, 91 changer transitions 29/275 dead transitions. [2025-03-08 17:30:03,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 275 transitions, 2685 flow [2025-03-08 17:30:03,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-08 17:30:03,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-03-08 17:30:03,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 253 transitions. [2025-03-08 17:30:03,804 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3892307692307692 [2025-03-08 17:30:03,804 INFO L175 Difference]: Start difference. First operand has 116 places, 139 transitions, 1314 flow. Second operand 25 states and 253 transitions. [2025-03-08 17:30:03,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 275 transitions, 2685 flow [2025-03-08 17:30:03,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 275 transitions, 2588 flow, removed 39 selfloop flow, removed 5 redundant places. [2025-03-08 17:30:03,841 INFO L231 Difference]: Finished difference. Result has 141 places, 157 transitions, 1752 flow [2025-03-08 17:30:03,842 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1255, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1752, PETRI_PLACES=141, PETRI_TRANSITIONS=157} [2025-03-08 17:30:03,842 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 116 predicate places. [2025-03-08 17:30:03,842 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 157 transitions, 1752 flow [2025-03-08 17:30:03,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.7272727272727275) internal successors, (126), 22 states have internal predecessors, (126), 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) [2025-03-08 17:30:03,842 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:03,842 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:03,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-08 17:30:04,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:04,043 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:04,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:04,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1307715529, now seen corresponding path program 5 times [2025-03-08 17:30:04,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:04,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454443277] [2025-03-08 17:30:04,043 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:30:04,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:04,049 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 25 statements into 3 equivalence classes. [2025-03-08 17:30:04,061 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 17:30:04,061 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-08 17:30:04,061 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:04,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:04,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454443277] [2025-03-08 17:30:04,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454443277] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:30:04,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:30:04,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-08 17:30:04,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402081361] [2025-03-08 17:30:04,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:30:04,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 17:30:04,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:04,521 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 17:30:04,521 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-03-08 17:30:04,521 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:30:04,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 157 transitions, 1752 flow. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:04,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:04,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:30:04,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:04,945 INFO L124 PetriNetUnfolderBase]: 1589/2862 cut-off events. [2025-03-08 17:30:04,946 INFO L125 PetriNetUnfolderBase]: For 26539/26539 co-relation queries the response was YES. [2025-03-08 17:30:04,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12530 conditions, 2862 events. 1589/2862 cut-off events. For 26539/26539 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16958 event pairs, 936 based on Foata normal form. 4/2866 useless extension candidates. Maximal degree in co-relation 12490. Up to 2154 conditions per place. [2025-03-08 17:30:04,961 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 152 selfloop transitions, 37 changer transitions 9/199 dead transitions. [2025-03-08 17:30:04,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 199 transitions, 2392 flow [2025-03-08 17:30:04,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 17:30:04,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-08 17:30:04,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 103 transitions. [2025-03-08 17:30:04,962 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39615384615384613 [2025-03-08 17:30:04,963 INFO L175 Difference]: Start difference. First operand has 141 places, 157 transitions, 1752 flow. Second operand 10 states and 103 transitions. [2025-03-08 17:30:04,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 199 transitions, 2392 flow [2025-03-08 17:30:05,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 199 transitions, 2184 flow, removed 70 selfloop flow, removed 12 redundant places. [2025-03-08 17:30:05,037 INFO L231 Difference]: Finished difference. Result has 137 places, 163 transitions, 1743 flow [2025-03-08 17:30:05,037 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1546, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1743, PETRI_PLACES=137, PETRI_TRANSITIONS=163} [2025-03-08 17:30:05,037 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 112 predicate places. [2025-03-08 17:30:05,037 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 163 transitions, 1743 flow [2025-03-08 17:30:05,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:05,037 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:05,038 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:05,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2025-03-08 17:30:05,038 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:05,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:05,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1826241509, now seen corresponding path program 6 times [2025-03-08 17:30:05,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:05,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373357708] [2025-03-08 17:30:05,039 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:30:05,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:05,045 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 25 statements into 3 equivalence classes. [2025-03-08 17:30:05,065 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 17:30:05,065 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 17:30:05,065 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:05,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:05,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:05,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373357708] [2025-03-08 17:30:05,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373357708] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:05,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712332097] [2025-03-08 17:30:05,577 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:30:05,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:05,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:05,579 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) [2025-03-08 17:30:05,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 17:30:05,631 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 25 statements into 3 equivalence classes. [2025-03-08 17:30:05,652 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 17:30:05,652 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 17:30:05,652 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:05,654 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-08 17:30:05,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:05,880 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 116 treesize of output 76 [2025-03-08 17:30:05,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:05,984 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:06,797 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:06,799 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 254 treesize of output 174 [2025-03-08 17:30:07,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:07,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712332097] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:07,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:07,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 22 [2025-03-08 17:30:07,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351131860] [2025-03-08 17:30:07,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:07,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 17:30:07,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:07,091 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 17:30:07,091 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2025-03-08 17:30:07,092 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:30:07,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 163 transitions, 1743 flow. Second operand has 22 states, 22 states have (on average 5.590909090909091) internal successors, (123), 22 states have internal predecessors, (123), 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) [2025-03-08 17:30:07,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:07,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:30:07,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:08,720 INFO L124 PetriNetUnfolderBase]: 1779/3241 cut-off events. [2025-03-08 17:30:08,720 INFO L125 PetriNetUnfolderBase]: For 33367/33367 co-relation queries the response was YES. [2025-03-08 17:30:08,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14282 conditions, 3241 events. 1779/3241 cut-off events. For 33367/33367 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 20073 event pairs, 534 based on Foata normal form. 3/3244 useless extension candidates. Maximal degree in co-relation 14242. Up to 1316 conditions per place. [2025-03-08 17:30:08,737 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 165 selfloop transitions, 132 changer transitions 29/327 dead transitions. [2025-03-08 17:30:08,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 327 transitions, 3580 flow [2025-03-08 17:30:08,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-08 17:30:08,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-03-08 17:30:08,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 239 transitions. [2025-03-08 17:30:08,738 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3676923076923077 [2025-03-08 17:30:08,738 INFO L175 Difference]: Start difference. First operand has 137 places, 163 transitions, 1743 flow. Second operand 25 states and 239 transitions. [2025-03-08 17:30:08,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 327 transitions, 3580 flow [2025-03-08 17:30:08,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 327 transitions, 3457 flow, removed 45 selfloop flow, removed 5 redundant places. [2025-03-08 17:30:08,824 INFO L231 Difference]: Finished difference. Result has 164 places, 217 transitions, 2797 flow [2025-03-08 17:30:08,824 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1663, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2797, PETRI_PLACES=164, PETRI_TRANSITIONS=217} [2025-03-08 17:30:08,826 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 139 predicate places. [2025-03-08 17:30:08,826 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 217 transitions, 2797 flow [2025-03-08 17:30:08,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.590909090909091) internal successors, (123), 22 states have internal predecessors, (123), 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) [2025-03-08 17:30:08,826 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:08,826 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:08,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-08 17:30:09,026 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,SelfDestructingSolverStorable21 [2025-03-08 17:30:09,027 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:09,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:09,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1566591157, now seen corresponding path program 7 times [2025-03-08 17:30:09,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:09,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141006218] [2025-03-08 17:30:09,027 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:30:09,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:09,033 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-08 17:30:09,043 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 17:30:09,043 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:30:09,043 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:09,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:09,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:09,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141006218] [2025-03-08 17:30:09,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141006218] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:09,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436162364] [2025-03-08 17:30:09,447 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:30:09,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:09,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:09,449 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) [2025-03-08 17:30:09,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 17:30:09,502 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-08 17:30:09,518 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 17:30:09,518 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:30:09,518 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:09,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-08 17:30:09,521 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:09,773 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 204 treesize of output 132 [2025-03-08 17:30:09,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:09,898 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:11,042 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:11,043 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 199 treesize of output 131 [2025-03-08 17:30:11,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:11,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436162364] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:11,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:11,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2025-03-08 17:30:11,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901129523] [2025-03-08 17:30:11,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:11,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 17:30:11,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:11,139 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 17:30:11,140 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2025-03-08 17:30:11,140 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:30:11,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 217 transitions, 2797 flow. Second operand has 21 states, 21 states have (on average 5.761904761904762) internal successors, (121), 21 states have internal predecessors, (121), 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) [2025-03-08 17:30:11,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:11,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:30:11,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:13,808 INFO L124 PetriNetUnfolderBase]: 2656/4950 cut-off events. [2025-03-08 17:30:13,808 INFO L125 PetriNetUnfolderBase]: For 77037/77037 co-relation queries the response was YES. [2025-03-08 17:30:13,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24579 conditions, 4950 events. 2656/4950 cut-off events. For 77037/77037 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 33249 event pairs, 631 based on Foata normal form. 9/4959 useless extension candidates. Maximal degree in co-relation 24531. Up to 1028 conditions per place. [2025-03-08 17:30:13,835 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 297 selfloop transitions, 155 changer transitions 31/484 dead transitions. [2025-03-08 17:30:13,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 484 transitions, 6411 flow [2025-03-08 17:30:13,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-08 17:30:13,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-03-08 17:30:13,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 316 transitions. [2025-03-08 17:30:13,837 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3920595533498759 [2025-03-08 17:30:13,837 INFO L175 Difference]: Start difference. First operand has 164 places, 217 transitions, 2797 flow. Second operand 31 states and 316 transitions. [2025-03-08 17:30:13,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 484 transitions, 6411 flow [2025-03-08 17:30:14,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 484 transitions, 5771 flow, removed 317 selfloop flow, removed 5 redundant places. [2025-03-08 17:30:14,224 INFO L231 Difference]: Finished difference. Result has 200 places, 290 transitions, 4106 flow [2025-03-08 17:30:14,224 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2547, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=4106, PETRI_PLACES=200, PETRI_TRANSITIONS=290} [2025-03-08 17:30:14,224 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 175 predicate places. [2025-03-08 17:30:14,224 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 290 transitions, 4106 flow [2025-03-08 17:30:14,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.761904761904762) internal successors, (121), 21 states have internal predecessors, (121), 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) [2025-03-08 17:30:14,225 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:14,225 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:14,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-08 17:30:14,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-03-08 17:30:14,425 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:14,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:14,426 INFO L85 PathProgramCache]: Analyzing trace with hash 801466567, now seen corresponding path program 8 times [2025-03-08 17:30:14,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:14,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080796030] [2025-03-08 17:30:14,426 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:30:14,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:14,431 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-08 17:30:14,440 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 17:30:14,440 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:30:14,440 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:14,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:14,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:14,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080796030] [2025-03-08 17:30:14,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080796030] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:14,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755177271] [2025-03-08 17:30:14,807 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:30:14,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:14,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:14,809 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) [2025-03-08 17:30:14,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 17:30:14,861 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-08 17:30:14,878 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 17:30:14,878 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:30:14,878 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:14,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-08 17:30:14,881 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:15,118 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 161 treesize of output 105 [2025-03-08 17:30:15,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:15,230 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:16,507 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:16,507 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 393 treesize of output 257 [2025-03-08 17:30:16,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:16,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755177271] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:16,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:16,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2025-03-08 17:30:16,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440678575] [2025-03-08 17:30:16,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:16,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 17:30:16,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:16,901 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 17:30:16,901 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2025-03-08 17:30:16,901 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:30:16,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 290 transitions, 4106 flow. Second operand has 21 states, 21 states have (on average 5.666666666666667) internal successors, (119), 21 states have internal predecessors, (119), 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) [2025-03-08 17:30:16,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:16,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:30:16,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:19,052 INFO L124 PetriNetUnfolderBase]: 2826/5339 cut-off events. [2025-03-08 17:30:19,052 INFO L125 PetriNetUnfolderBase]: For 54804/54804 co-relation queries the response was YES. [2025-03-08 17:30:19,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25411 conditions, 5339 events. 2826/5339 cut-off events. For 54804/54804 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 37085 event pairs, 1245 based on Foata normal form. 9/5348 useless extension candidates. Maximal degree in co-relation 25352. Up to 2798 conditions per place. [2025-03-08 17:30:19,083 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 287 selfloop transitions, 134 changer transitions 32/454 dead transitions. [2025-03-08 17:30:19,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 454 transitions, 6319 flow [2025-03-08 17:30:19,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-08 17:30:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-03-08 17:30:19,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 264 transitions. [2025-03-08 17:30:19,085 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40615384615384614 [2025-03-08 17:30:19,085 INFO L175 Difference]: Start difference. First operand has 200 places, 290 transitions, 4106 flow. Second operand 25 states and 264 transitions. [2025-03-08 17:30:19,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 454 transitions, 6319 flow [2025-03-08 17:30:19,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 454 transitions, 5628 flow, removed 322 selfloop flow, removed 7 redundant places. [2025-03-08 17:30:19,432 INFO L231 Difference]: Finished difference. Result has 229 places, 323 transitions, 4469 flow [2025-03-08 17:30:19,432 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3592, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4469, PETRI_PLACES=229, PETRI_TRANSITIONS=323} [2025-03-08 17:30:19,432 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 204 predicate places. [2025-03-08 17:30:19,432 INFO L471 AbstractCegarLoop]: Abstraction has has 229 places, 323 transitions, 4469 flow [2025-03-08 17:30:19,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.666666666666667) internal successors, (119), 21 states have internal predecessors, (119), 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) [2025-03-08 17:30:19,432 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:19,432 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:19,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-08 17:30:19,633 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,SelfDestructingSolverStorable23 [2025-03-08 17:30:19,633 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:19,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:19,634 INFO L85 PathProgramCache]: Analyzing trace with hash 150025174, now seen corresponding path program 9 times [2025-03-08 17:30:19,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:19,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83918319] [2025-03-08 17:30:19,634 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:30:19,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:19,639 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 3 equivalence classes. [2025-03-08 17:30:19,648 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 27 statements. [2025-03-08 17:30:19,648 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:30:19,648 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:19,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:19,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83918319] [2025-03-08 17:30:19,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83918319] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:19,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219149586] [2025-03-08 17:30:19,959 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:30:19,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:19,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:19,961 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) [2025-03-08 17:30:19,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 17:30:20,024 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 3 equivalence classes. [2025-03-08 17:30:20,046 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 27 statements. [2025-03-08 17:30:20,046 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:30:20,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:20,051 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-08 17:30:20,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:20,235 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:20,343 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-08 17:30:20,343 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 40 treesize of output 19 [2025-03-08 17:30:20,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:20,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219149586] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:20,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:20,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2025-03-08 17:30:20,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051041327] [2025-03-08 17:30:20,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:20,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:30:20,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:20,367 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:30:20,367 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:30:20,367 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:30:20,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 323 transitions, 4469 flow. Second operand has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 19 states have internal predecessors, (117), 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) [2025-03-08 17:30:20,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:20,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:30:20,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:21,453 INFO L124 PetriNetUnfolderBase]: 2930/5511 cut-off events. [2025-03-08 17:30:21,453 INFO L125 PetriNetUnfolderBase]: For 38289/38289 co-relation queries the response was YES. [2025-03-08 17:30:21,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24517 conditions, 5511 events. 2930/5511 cut-off events. For 38289/38289 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 38289 event pairs, 403 based on Foata normal form. 21/5532 useless extension candidates. Maximal degree in co-relation 24448. Up to 1154 conditions per place. [2025-03-08 17:30:21,489 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 230 selfloop transitions, 193 changer transitions 11/435 dead transitions. [2025-03-08 17:30:21,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 435 transitions, 6153 flow [2025-03-08 17:30:21,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-08 17:30:21,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-08 17:30:21,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 194 transitions. [2025-03-08 17:30:21,491 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3553113553113553 [2025-03-08 17:30:21,491 INFO L175 Difference]: Start difference. First operand has 229 places, 323 transitions, 4469 flow. Second operand 21 states and 194 transitions. [2025-03-08 17:30:21,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 435 transitions, 6153 flow [2025-03-08 17:30:21,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 435 transitions, 5945 flow, removed 98 selfloop flow, removed 8 redundant places. [2025-03-08 17:30:21,745 INFO L231 Difference]: Finished difference. Result has 240 places, 351 transitions, 5153 flow [2025-03-08 17:30:21,745 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4267, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5153, PETRI_PLACES=240, PETRI_TRANSITIONS=351} [2025-03-08 17:30:21,745 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 215 predicate places. [2025-03-08 17:30:21,745 INFO L471 AbstractCegarLoop]: Abstraction has has 240 places, 351 transitions, 5153 flow [2025-03-08 17:30:21,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 19 states have internal predecessors, (117), 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) [2025-03-08 17:30:21,746 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:21,746 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:21,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-08 17:30:21,946 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,SelfDestructingSolverStorable24 [2025-03-08 17:30:21,946 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:21,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:21,947 INFO L85 PathProgramCache]: Analyzing trace with hash -589990366, now seen corresponding path program 10 times [2025-03-08 17:30:21,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:21,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063487250] [2025-03-08 17:30:21,947 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:30:21,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:21,951 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-03-08 17:30:21,958 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:30:21,958 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:30:21,958 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:22,204 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:22,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:22,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063487250] [2025-03-08 17:30:22,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063487250] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:22,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8826070] [2025-03-08 17:30:22,204 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:30:22,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:22,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:22,207 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) [2025-03-08 17:30:22,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 17:30:22,262 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-03-08 17:30:22,284 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:30:22,284 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:30:22,284 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:22,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-08 17:30:22,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:22,397 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 91 treesize of output 59 [2025-03-08 17:30:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:22,432 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:22,530 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-08 17:30:22,531 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 79 treesize of output 42 [2025-03-08 17:30:22,556 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:22,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8826070] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:22,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:22,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2025-03-08 17:30:22,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308736431] [2025-03-08 17:30:22,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:22,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-08 17:30:22,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:22,557 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-08 17:30:22,557 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2025-03-08 17:30:22,557 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:30:22,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 351 transitions, 5153 flow. Second operand has 20 states, 20 states have (on average 6.1) internal successors, (122), 20 states have internal predecessors, (122), 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) [2025-03-08 17:30:22,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:22,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:30:22,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:23,639 INFO L124 PetriNetUnfolderBase]: 2918/5466 cut-off events. [2025-03-08 17:30:23,639 INFO L125 PetriNetUnfolderBase]: For 40074/40074 co-relation queries the response was YES. [2025-03-08 17:30:23,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24816 conditions, 5466 events. 2918/5466 cut-off events. For 40074/40074 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 37966 event pairs, 1328 based on Foata normal form. 32/5498 useless extension candidates. Maximal degree in co-relation 24748. Up to 2825 conditions per place. [2025-03-08 17:30:23,672 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 306 selfloop transitions, 92 changer transitions 9/408 dead transitions. [2025-03-08 17:30:23,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 408 transitions, 6212 flow [2025-03-08 17:30:23,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 17:30:23,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-08 17:30:23,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 138 transitions. [2025-03-08 17:30:23,673 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2025-03-08 17:30:23,673 INFO L175 Difference]: Start difference. First operand has 240 places, 351 transitions, 5153 flow. Second operand 12 states and 138 transitions. [2025-03-08 17:30:23,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 408 transitions, 6212 flow [2025-03-08 17:30:23,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 408 transitions, 5859 flow, removed 83 selfloop flow, removed 15 redundant places. [2025-03-08 17:30:23,922 INFO L231 Difference]: Finished difference. Result has 234 places, 344 transitions, 4934 flow [2025-03-08 17:30:23,922 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4688, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4934, PETRI_PLACES=234, PETRI_TRANSITIONS=344} [2025-03-08 17:30:23,922 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 209 predicate places. [2025-03-08 17:30:23,923 INFO L471 AbstractCegarLoop]: Abstraction has has 234 places, 344 transitions, 4934 flow [2025-03-08 17:30:23,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.1) internal successors, (122), 20 states have internal predecessors, (122), 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) [2025-03-08 17:30:23,923 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:23,923 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:23,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-08 17:30:24,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:24,123 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:24,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:24,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1274068642, now seen corresponding path program 11 times [2025-03-08 17:30:24,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:24,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705944713] [2025-03-08 17:30:24,124 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:30:24,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:24,129 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 3 equivalence classes. [2025-03-08 17:30:24,139 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:30:24,139 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-08 17:30:24,139 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:30:24,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:24,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705944713] [2025-03-08 17:30:24,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705944713] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:24,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111113882] [2025-03-08 17:30:24,357 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:30:24,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:24,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:24,359 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) [2025-03-08 17:30:24,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 17:30:24,419 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 3 equivalence classes. [2025-03-08 17:30:24,438 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:30:24,438 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-08 17:30:24,438 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:24,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-08 17:30:24,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:24,540 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:24,635 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-08 17:30:24,635 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 40 treesize of output 19 [2025-03-08 17:30:24,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:24,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111113882] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:24,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:24,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2025-03-08 17:30:24,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126502390] [2025-03-08 17:30:24,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:24,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 17:30:24,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:24,667 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 17:30:24,667 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2025-03-08 17:30:24,667 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:30:24,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 344 transitions, 4934 flow. Second operand has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:24,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:24,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:30:24,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:25,573 INFO L124 PetriNetUnfolderBase]: 3007/5633 cut-off events. [2025-03-08 17:30:25,573 INFO L125 PetriNetUnfolderBase]: For 36891/36891 co-relation queries the response was YES. [2025-03-08 17:30:25,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24637 conditions, 5633 events. 3007/5633 cut-off events. For 36891/36891 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 39390 event pairs, 659 based on Foata normal form. 21/5654 useless extension candidates. Maximal degree in co-relation 24578. Up to 2374 conditions per place. [2025-03-08 17:30:25,610 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 322 selfloop transitions, 106 changer transitions 6/435 dead transitions. [2025-03-08 17:30:25,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 435 transitions, 6389 flow [2025-03-08 17:30:25,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 17:30:25,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-08 17:30:25,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 145 transitions. [2025-03-08 17:30:25,611 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46474358974358976 [2025-03-08 17:30:25,611 INFO L175 Difference]: Start difference. First operand has 234 places, 344 transitions, 4934 flow. Second operand 12 states and 145 transitions. [2025-03-08 17:30:25,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 435 transitions, 6389 flow [2025-03-08 17:30:25,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 435 transitions, 6185 flow, removed 17 selfloop flow, removed 10 redundant places. [2025-03-08 17:30:25,822 INFO L231 Difference]: Finished difference. Result has 238 places, 351 transitions, 5125 flow [2025-03-08 17:30:25,822 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4714, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5125, PETRI_PLACES=238, PETRI_TRANSITIONS=351} [2025-03-08 17:30:25,822 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 213 predicate places. [2025-03-08 17:30:25,823 INFO L471 AbstractCegarLoop]: Abstraction has has 238 places, 351 transitions, 5125 flow [2025-03-08 17:30:25,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:25,823 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:25,823 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:25,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-08 17:30:26,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-08 17:30:26,023 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:26,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:26,024 INFO L85 PathProgramCache]: Analyzing trace with hash 809098876, now seen corresponding path program 12 times [2025-03-08 17:30:26,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:26,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194362683] [2025-03-08 17:30:26,024 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:30:26,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:26,029 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 3 equivalence classes. [2025-03-08 17:30:26,039 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:30:26,039 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 17:30:26,039 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:26,337 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:26,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:26,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194362683] [2025-03-08 17:30:26,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194362683] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:26,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475507573] [2025-03-08 17:30:26,338 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:30:26,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:26,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:26,339 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) [2025-03-08 17:30:26,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 17:30:26,395 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 3 equivalence classes. [2025-03-08 17:30:26,414 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:30:26,414 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 17:30:26,414 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:26,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-08 17:30:26,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:26,583 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 61 treesize of output 37 [2025-03-08 17:30:26,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:26,592 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:26,689 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-08 17:30:26,689 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 109 treesize of output 56 [2025-03-08 17:30:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:26,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475507573] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:26,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:26,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2025-03-08 17:30:26,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355264695] [2025-03-08 17:30:26,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:26,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:30:26,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:26,711 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:30:26,712 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:30:26,712 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:30:26,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 351 transitions, 5125 flow. Second operand has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 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) [2025-03-08 17:30:26,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:26,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:30:26,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:27,865 INFO L124 PetriNetUnfolderBase]: 2842/5347 cut-off events. [2025-03-08 17:30:27,865 INFO L125 PetriNetUnfolderBase]: For 36723/36723 co-relation queries the response was YES. [2025-03-08 17:30:27,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24824 conditions, 5347 events. 2842/5347 cut-off events. For 36723/36723 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 37128 event pairs, 754 based on Foata normal form. 12/5359 useless extension candidates. Maximal degree in co-relation 24762. Up to 1452 conditions per place. [2025-03-08 17:30:27,901 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 246 selfloop transitions, 175 changer transitions 19/441 dead transitions. [2025-03-08 17:30:27,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 441 transitions, 6399 flow [2025-03-08 17:30:27,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-08 17:30:27,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-03-08 17:30:27,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 218 transitions. [2025-03-08 17:30:27,902 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36454849498327757 [2025-03-08 17:30:27,902 INFO L175 Difference]: Start difference. First operand has 238 places, 351 transitions, 5125 flow. Second operand 23 states and 218 transitions. [2025-03-08 17:30:27,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 441 transitions, 6399 flow [2025-03-08 17:30:28,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 441 transitions, 6289 flow, removed 2 selfloop flow, removed 5 redundant places. [2025-03-08 17:30:28,101 INFO L231 Difference]: Finished difference. Result has 257 places, 349 transitions, 5330 flow [2025-03-08 17:30:28,101 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4982, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=5330, PETRI_PLACES=257, PETRI_TRANSITIONS=349} [2025-03-08 17:30:28,101 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 232 predicate places. [2025-03-08 17:30:28,101 INFO L471 AbstractCegarLoop]: Abstraction has has 257 places, 349 transitions, 5330 flow [2025-03-08 17:30:28,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 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) [2025-03-08 17:30:28,101 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:28,101 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:28,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-08 17:30:28,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-03-08 17:30:28,302 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:28,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:28,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1464330334, now seen corresponding path program 13 times [2025-03-08 17:30:28,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:28,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025979376] [2025-03-08 17:30:28,303 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:30:28,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:28,308 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-08 17:30:28,316 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:30:28,316 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:30:28,316 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:28,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:28,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:28,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025979376] [2025-03-08 17:30:28,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025979376] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:28,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580534678] [2025-03-08 17:30:28,578 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:30:28,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:28,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:28,580 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:30:28,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-08 17:30:28,650 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-08 17:30:28,672 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:30:28,672 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:30:28,672 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:28,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-08 17:30:28,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:28,798 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 112 treesize of output 72 [2025-03-08 17:30:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:28,885 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:29,066 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-08 17:30:29,066 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 40 treesize of output 19 [2025-03-08 17:30:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:29,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580534678] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:29,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:29,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 21 [2025-03-08 17:30:29,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074356867] [2025-03-08 17:30:29,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:29,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 17:30:29,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:29,086 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 17:30:29,086 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2025-03-08 17:30:29,086 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:30:29,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 349 transitions, 5330 flow. Second operand has 21 states, 21 states have (on average 5.809523809523809) internal successors, (122), 21 states have internal predecessors, (122), 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) [2025-03-08 17:30:29,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:29,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:30:29,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:30,470 INFO L124 PetriNetUnfolderBase]: 3002/5606 cut-off events. [2025-03-08 17:30:30,471 INFO L125 PetriNetUnfolderBase]: For 43447/43447 co-relation queries the response was YES. [2025-03-08 17:30:30,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26897 conditions, 5606 events. 3002/5606 cut-off events. For 43447/43447 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 38956 event pairs, 357 based on Foata normal form. 15/5621 useless extension candidates. Maximal degree in co-relation 26833. Up to 1386 conditions per place. [2025-03-08 17:30:30,506 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 264 selfloop transitions, 220 changer transitions 14/499 dead transitions. [2025-03-08 17:30:30,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 499 transitions, 7237 flow [2025-03-08 17:30:30,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-08 17:30:30,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-03-08 17:30:30,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 277 transitions. [2025-03-08 17:30:30,507 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42615384615384616 [2025-03-08 17:30:30,508 INFO L175 Difference]: Start difference. First operand has 257 places, 349 transitions, 5330 flow. Second operand 25 states and 277 transitions. [2025-03-08 17:30:30,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 499 transitions, 7237 flow [2025-03-08 17:30:30,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 499 transitions, 6858 flow, removed 20 selfloop flow, removed 14 redundant places. [2025-03-08 17:30:30,733 INFO L231 Difference]: Finished difference. Result has 268 places, 370 transitions, 5875 flow [2025-03-08 17:30:30,734 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4941, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5875, PETRI_PLACES=268, PETRI_TRANSITIONS=370} [2025-03-08 17:30:30,734 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 243 predicate places. [2025-03-08 17:30:30,734 INFO L471 AbstractCegarLoop]: Abstraction has has 268 places, 370 transitions, 5875 flow [2025-03-08 17:30:30,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.809523809523809) internal successors, (122), 21 states have internal predecessors, (122), 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) [2025-03-08 17:30:30,734 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:30,734 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:30,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-08 17:30:30,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-03-08 17:30:30,935 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:30,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:30,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1583081118, now seen corresponding path program 14 times [2025-03-08 17:30:30,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:30,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829370817] [2025-03-08 17:30:30,936 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:30:30,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:30,943 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-08 17:30:30,954 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:30:30,955 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:30:30,955 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:31,168 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:31,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:31,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829370817] [2025-03-08 17:30:31,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829370817] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:31,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623108958] [2025-03-08 17:30:31,169 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:30:31,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:31,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:31,170 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:30:31,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-08 17:30:31,229 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-08 17:30:31,246 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:30:31,246 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:30:31,246 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:31,247 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-08 17:30:31,248 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:31,437 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 61 treesize of output 37 [2025-03-08 17:30:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:31,445 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:31,576 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:31,576 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 117 treesize of output 69 [2025-03-08 17:30:31,614 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:31,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623108958] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:31,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:31,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2025-03-08 17:30:31,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201844417] [2025-03-08 17:30:31,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:31,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 17:30:31,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:31,615 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 17:30:31,615 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2025-03-08 17:30:31,615 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:30:31,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 370 transitions, 5875 flow. Second operand has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:31,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:31,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:30:31,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:32,842 INFO L124 PetriNetUnfolderBase]: 2983/5557 cut-off events. [2025-03-08 17:30:32,843 INFO L125 PetriNetUnfolderBase]: For 43756/43756 co-relation queries the response was YES. [2025-03-08 17:30:32,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27221 conditions, 5557 events. 2983/5557 cut-off events. For 43756/43756 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 38537 event pairs, 1318 based on Foata normal form. 3/5560 useless extension candidates. Maximal degree in co-relation 27152. Up to 2596 conditions per place. [2025-03-08 17:30:32,918 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 246 selfloop transitions, 146 changer transitions 12/405 dead transitions. [2025-03-08 17:30:32,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 405 transitions, 6772 flow [2025-03-08 17:30:32,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 17:30:32,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-08 17:30:32,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 119 transitions. [2025-03-08 17:30:32,919 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3520710059171598 [2025-03-08 17:30:32,919 INFO L175 Difference]: Start difference. First operand has 268 places, 370 transitions, 5875 flow. Second operand 13 states and 119 transitions. [2025-03-08 17:30:32,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 405 transitions, 6772 flow [2025-03-08 17:30:33,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 405 transitions, 6507 flow, removed 47 selfloop flow, removed 14 redundant places. [2025-03-08 17:30:33,170 INFO L231 Difference]: Finished difference. Result has 265 places, 363 transitions, 5796 flow [2025-03-08 17:30:33,170 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5550, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5796, PETRI_PLACES=265, PETRI_TRANSITIONS=363} [2025-03-08 17:30:33,171 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 240 predicate places. [2025-03-08 17:30:33,171 INFO L471 AbstractCegarLoop]: Abstraction has has 265 places, 363 transitions, 5796 flow [2025-03-08 17:30:33,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:33,171 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:33,171 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:33,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-08 17:30:33,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:33,372 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:33,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:33,372 INFO L85 PathProgramCache]: Analyzing trace with hash 948281940, now seen corresponding path program 15 times [2025-03-08 17:30:33,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:33,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885861094] [2025-03-08 17:30:33,372 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:30:33,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:33,378 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 3 equivalence classes. [2025-03-08 17:30:33,387 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 27 statements. [2025-03-08 17:30:33,387 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:30:33,387 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:33,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:33,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:33,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885861094] [2025-03-08 17:30:33,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885861094] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:33,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58011615] [2025-03-08 17:30:33,658 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:30:33,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:33,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:33,660 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:30:33,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-08 17:30:33,727 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 3 equivalence classes. [2025-03-08 17:30:33,745 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 27 statements. [2025-03-08 17:30:33,745 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:30:33,745 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:33,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-08 17:30:33,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:33,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:33,978 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:34,096 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:34,097 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 51 treesize of output 27 [2025-03-08 17:30:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:34,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58011615] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:34,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:34,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 18 [2025-03-08 17:30:34,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227614896] [2025-03-08 17:30:34,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:34,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 17:30:34,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:34,136 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 17:30:34,136 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2025-03-08 17:30:34,136 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:30:34,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 363 transitions, 5796 flow. Second operand has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 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) [2025-03-08 17:30:34,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:34,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:30:34,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:35,465 INFO L124 PetriNetUnfolderBase]: 3053/5666 cut-off events. [2025-03-08 17:30:35,465 INFO L125 PetriNetUnfolderBase]: For 46661/46661 co-relation queries the response was YES. [2025-03-08 17:30:35,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27699 conditions, 5666 events. 3053/5666 cut-off events. For 46661/46661 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 39257 event pairs, 1136 based on Foata normal form. 24/5690 useless extension candidates. Maximal degree in co-relation 27631. Up to 2513 conditions per place. [2025-03-08 17:30:35,506 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 214 selfloop transitions, 217 changer transitions 7/439 dead transitions. [2025-03-08 17:30:35,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 439 transitions, 7068 flow [2025-03-08 17:30:35,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-08 17:30:35,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-03-08 17:30:35,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 192 transitions. [2025-03-08 17:30:35,507 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3356643356643357 [2025-03-08 17:30:35,507 INFO L175 Difference]: Start difference. First operand has 265 places, 363 transitions, 5796 flow. Second operand 22 states and 192 transitions. [2025-03-08 17:30:35,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 439 transitions, 7068 flow [2025-03-08 17:30:35,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 439 transitions, 6751 flow, removed 16 selfloop flow, removed 10 redundant places. [2025-03-08 17:30:35,811 INFO L231 Difference]: Finished difference. Result has 273 places, 369 transitions, 6022 flow [2025-03-08 17:30:35,811 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5461, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6022, PETRI_PLACES=273, PETRI_TRANSITIONS=369} [2025-03-08 17:30:35,812 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 248 predicate places. [2025-03-08 17:30:35,812 INFO L471 AbstractCegarLoop]: Abstraction has has 273 places, 369 transitions, 6022 flow [2025-03-08 17:30:35,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.222222222222222) internal successors, (112), 18 states have internal predecessors, (112), 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) [2025-03-08 17:30:35,812 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:35,812 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:35,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-08 17:30:36,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:36,013 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:36,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:36,014 INFO L85 PathProgramCache]: Analyzing trace with hash 413409454, now seen corresponding path program 16 times [2025-03-08 17:30:36,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:36,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438692480] [2025-03-08 17:30:36,014 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:30:36,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:36,020 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-03-08 17:30:36,030 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:30:36,030 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:30:36,030 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:36,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:36,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:36,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438692480] [2025-03-08 17:30:36,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438692480] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:30:36,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:30:36,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-08 17:30:36,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434547571] [2025-03-08 17:30:36,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:30:36,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 17:30:36,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:36,288 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 17:30:36,288 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2025-03-08 17:30:36,288 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:30:36,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 369 transitions, 6022 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 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) [2025-03-08 17:30:36,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:36,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:30:36,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:37,210 INFO L124 PetriNetUnfolderBase]: 3178/5896 cut-off events. [2025-03-08 17:30:37,211 INFO L125 PetriNetUnfolderBase]: For 49679/49679 co-relation queries the response was YES. [2025-03-08 17:30:37,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29077 conditions, 5896 events. 3178/5896 cut-off events. For 49679/49679 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 41411 event pairs, 1994 based on Foata normal form. 18/5914 useless extension candidates. Maximal degree in co-relation 29008. Up to 4718 conditions per place. [2025-03-08 17:30:37,250 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 346 selfloop transitions, 65 changer transitions 5/417 dead transitions. [2025-03-08 17:30:37,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 417 transitions, 7300 flow [2025-03-08 17:30:37,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 17:30:37,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-08 17:30:37,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2025-03-08 17:30:37,251 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.405982905982906 [2025-03-08 17:30:37,251 INFO L175 Difference]: Start difference. First operand has 273 places, 369 transitions, 6022 flow. Second operand 9 states and 95 transitions. [2025-03-08 17:30:37,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 417 transitions, 7300 flow [2025-03-08 17:30:37,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 417 transitions, 7159 flow, removed 20 selfloop flow, removed 11 redundant places. [2025-03-08 17:30:37,522 INFO L231 Difference]: Finished difference. Result has 272 places, 377 transitions, 6214 flow [2025-03-08 17:30:37,523 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5896, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6214, PETRI_PLACES=272, PETRI_TRANSITIONS=377} [2025-03-08 17:30:37,523 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 247 predicate places. [2025-03-08 17:30:37,523 INFO L471 AbstractCegarLoop]: Abstraction has has 272 places, 377 transitions, 6214 flow [2025-03-08 17:30:37,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 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) [2025-03-08 17:30:37,523 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:37,523 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:37,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2025-03-08 17:30:37,524 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:37,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:37,524 INFO L85 PathProgramCache]: Analyzing trace with hash -392829830, now seen corresponding path program 17 times [2025-03-08 17:30:37,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:37,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806962712] [2025-03-08 17:30:37,524 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:30:37,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:37,531 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 3 equivalence classes. [2025-03-08 17:30:37,540 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:30:37,540 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-08 17:30:37,540 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:37,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:30:37,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:37,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806962712] [2025-03-08 17:30:37,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806962712] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:37,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729117551] [2025-03-08 17:30:37,786 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:30:37,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:37,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:37,788 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:30:37,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-08 17:30:37,858 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 3 equivalence classes. [2025-03-08 17:30:37,880 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:30:37,880 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-08 17:30:37,880 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:37,881 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-08 17:30:37,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:37,938 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 91 treesize of output 59 [2025-03-08 17:30:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:38,024 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:38,156 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:38,157 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 87 treesize of output 47 [2025-03-08 17:30:38,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:38,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729117551] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:38,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:38,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2025-03-08 17:30:38,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502123403] [2025-03-08 17:30:38,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:38,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 17:30:38,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:38,206 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 17:30:38,206 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2025-03-08 17:30:38,206 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:30:38,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 377 transitions, 6214 flow. Second operand has 18 states, 18 states have (on average 5.944444444444445) internal successors, (107), 18 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:38,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:38,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:30:38,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:39,355 INFO L124 PetriNetUnfolderBase]: 3194/5909 cut-off events. [2025-03-08 17:30:39,355 INFO L125 PetriNetUnfolderBase]: For 52121/52121 co-relation queries the response was YES. [2025-03-08 17:30:39,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29407 conditions, 5909 events. 3194/5909 cut-off events. For 52121/52121 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 41530 event pairs, 1598 based on Foata normal form. 27/5936 useless extension candidates. Maximal degree in co-relation 29336. Up to 4059 conditions per place. [2025-03-08 17:30:39,400 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 276 selfloop transitions, 139 changer transitions 6/422 dead transitions. [2025-03-08 17:30:39,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 422 transitions, 7218 flow [2025-03-08 17:30:39,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 17:30:39,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-08 17:30:39,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 131 transitions. [2025-03-08 17:30:39,401 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4198717948717949 [2025-03-08 17:30:39,401 INFO L175 Difference]: Start difference. First operand has 272 places, 377 transitions, 6214 flow. Second operand 12 states and 131 transitions. [2025-03-08 17:30:39,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 422 transitions, 7218 flow [2025-03-08 17:30:39,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 422 transitions, 7092 flow, removed 15 selfloop flow, removed 6 redundant places. [2025-03-08 17:30:39,769 INFO L231 Difference]: Finished difference. Result has 279 places, 374 transitions, 6490 flow [2025-03-08 17:30:39,770 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5979, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6490, PETRI_PLACES=279, PETRI_TRANSITIONS=374} [2025-03-08 17:30:39,770 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 254 predicate places. [2025-03-08 17:30:39,770 INFO L471 AbstractCegarLoop]: Abstraction has has 279 places, 374 transitions, 6490 flow [2025-03-08 17:30:39,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.944444444444445) internal successors, (107), 18 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:39,770 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:39,770 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:39,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-08 17:30:39,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2025-03-08 17:30:39,971 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:39,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:39,971 INFO L85 PathProgramCache]: Analyzing trace with hash -839570062, now seen corresponding path program 18 times [2025-03-08 17:30:39,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:39,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514145597] [2025-03-08 17:30:39,971 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:30:39,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:39,977 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 3 equivalence classes. [2025-03-08 17:30:39,987 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:30:39,987 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 17:30:39,987 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:40,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:40,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:40,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514145597] [2025-03-08 17:30:40,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514145597] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:40,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568999888] [2025-03-08 17:30:40,226 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:30:40,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:40,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:40,228 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:30:40,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-08 17:30:40,290 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 3 equivalence classes. [2025-03-08 17:30:40,307 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:30:40,307 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 17:30:40,307 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:40,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-03-08 17:30:40,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:40,321 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 15 treesize of output 1 [2025-03-08 17:30:40,335 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 19 treesize of output 1 [2025-03-08 17:30:40,347 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 19 treesize of output 1 [2025-03-08 17:30:40,489 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 91 treesize of output 59 [2025-03-08 17:30:40,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:30:40,524 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:40,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:40,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568999888] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:40,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:40,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 7] total 23 [2025-03-08 17:30:40,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917198820] [2025-03-08 17:30:40,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:40,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 17:30:40,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:40,657 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 17:30:40,657 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2025-03-08 17:30:40,657 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:30:40,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 374 transitions, 6490 flow. Second operand has 23 states, 23 states have (on average 5.608695652173913) internal successors, (129), 23 states have internal predecessors, (129), 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) [2025-03-08 17:30:40,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:40,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:30:40,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:41,709 INFO L124 PetriNetUnfolderBase]: 3183/5883 cut-off events. [2025-03-08 17:30:41,709 INFO L125 PetriNetUnfolderBase]: For 56109/56109 co-relation queries the response was YES. [2025-03-08 17:30:41,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30117 conditions, 5883 events. 3183/5883 cut-off events. For 56109/56109 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 41216 event pairs, 2122 based on Foata normal form. 6/5889 useless extension candidates. Maximal degree in co-relation 30044. Up to 5090 conditions per place. [2025-03-08 17:30:41,755 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 345 selfloop transitions, 51 changer transitions 12/409 dead transitions. [2025-03-08 17:30:41,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 409 transitions, 7437 flow [2025-03-08 17:30:41,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 17:30:41,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-08 17:30:41,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 114 transitions. [2025-03-08 17:30:41,756 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33727810650887574 [2025-03-08 17:30:41,756 INFO L175 Difference]: Start difference. First operand has 279 places, 374 transitions, 6490 flow. Second operand 13 states and 114 transitions. [2025-03-08 17:30:41,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 409 transitions, 7437 flow [2025-03-08 17:30:42,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 409 transitions, 7373 flow, removed 9 selfloop flow, removed 7 redundant places. [2025-03-08 17:30:42,108 INFO L231 Difference]: Finished difference. Result has 284 places, 370 transitions, 6440 flow [2025-03-08 17:30:42,108 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6350, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6440, PETRI_PLACES=284, PETRI_TRANSITIONS=370} [2025-03-08 17:30:42,108 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 259 predicate places. [2025-03-08 17:30:42,108 INFO L471 AbstractCegarLoop]: Abstraction has has 284 places, 370 transitions, 6440 flow [2025-03-08 17:30:42,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.608695652173913) internal successors, (129), 23 states have internal predecessors, (129), 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) [2025-03-08 17:30:42,108 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:42,108 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:42,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-08 17:30:42,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2025-03-08 17:30:42,309 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:42,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:42,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1753170578, now seen corresponding path program 19 times [2025-03-08 17:30:42,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:42,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208791508] [2025-03-08 17:30:42,310 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:30:42,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:42,315 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-08 17:30:42,321 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:30:42,321 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:30:42,322 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:42,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:42,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208791508] [2025-03-08 17:30:42,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208791508] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:42,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310293470] [2025-03-08 17:30:42,530 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:30:42,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:42,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:42,532 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:30:42,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-08 17:30:42,601 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-08 17:30:42,618 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:30:42,618 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:30:42,618 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:42,619 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-08 17:30:42,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:42,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:42,741 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:42,862 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:42,862 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 51 treesize of output 27 [2025-03-08 17:30:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:42,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310293470] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:42,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:42,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 20 [2025-03-08 17:30:42,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381170583] [2025-03-08 17:30:42,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:42,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-08 17:30:42,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:42,894 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-08 17:30:42,894 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2025-03-08 17:30:42,894 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:30:42,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 370 transitions, 6440 flow. Second operand has 20 states, 20 states have (on average 6.0) internal successors, (120), 20 states have internal predecessors, (120), 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) [2025-03-08 17:30:42,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:42,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:30:42,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:43,976 INFO L124 PetriNetUnfolderBase]: 3189/5882 cut-off events. [2025-03-08 17:30:43,976 INFO L125 PetriNetUnfolderBase]: For 57136/57136 co-relation queries the response was YES. [2025-03-08 17:30:44,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30157 conditions, 5882 events. 3189/5882 cut-off events. For 57136/57136 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 41089 event pairs, 1884 based on Foata normal form. 16/5898 useless extension candidates. Maximal degree in co-relation 30083. Up to 4542 conditions per place. [2025-03-08 17:30:44,014 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 297 selfloop transitions, 121 changer transitions 7/426 dead transitions. [2025-03-08 17:30:44,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 426 transitions, 7542 flow [2025-03-08 17:30:44,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-08 17:30:44,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-08 17:30:44,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 152 transitions. [2025-03-08 17:30:44,015 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36538461538461536 [2025-03-08 17:30:44,015 INFO L175 Difference]: Start difference. First operand has 284 places, 370 transitions, 6440 flow. Second operand 16 states and 152 transitions. [2025-03-08 17:30:44,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 426 transitions, 7542 flow [2025-03-08 17:30:44,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 426 transitions, 7313 flow, removed 12 selfloop flow, removed 14 redundant places. [2025-03-08 17:30:44,318 INFO L231 Difference]: Finished difference. Result has 284 places, 371 transitions, 6490 flow [2025-03-08 17:30:44,318 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6150, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6490, PETRI_PLACES=284, PETRI_TRANSITIONS=371} [2025-03-08 17:30:44,319 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 259 predicate places. [2025-03-08 17:30:44,319 INFO L471 AbstractCegarLoop]: Abstraction has has 284 places, 371 transitions, 6490 flow [2025-03-08 17:30:44,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.0) internal successors, (120), 20 states have internal predecessors, (120), 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) [2025-03-08 17:30:44,319 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:44,319 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:44,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-03-08 17:30:44,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:44,520 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:44,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:44,520 INFO L85 PathProgramCache]: Analyzing trace with hash 947920726, now seen corresponding path program 20 times [2025-03-08 17:30:44,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:44,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597184336] [2025-03-08 17:30:44,520 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:30:44,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:44,525 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-08 17:30:44,532 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:30:44,532 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:30:44,532 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:44,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:44,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:44,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597184336] [2025-03-08 17:30:44,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597184336] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:30:44,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:30:44,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-08 17:30:44,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420931571] [2025-03-08 17:30:44,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:30:44,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 17:30:44,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:44,770 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 17:30:44,770 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-08 17:30:44,770 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:30:44,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 371 transitions, 6490 flow. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:44,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:44,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:30:44,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:45,858 INFO L124 PetriNetUnfolderBase]: 3446/6328 cut-off events. [2025-03-08 17:30:45,859 INFO L125 PetriNetUnfolderBase]: For 61909/61909 co-relation queries the response was YES. [2025-03-08 17:30:45,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32384 conditions, 6328 events. 3446/6328 cut-off events. For 61909/61909 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 44842 event pairs, 2240 based on Foata normal form. 2/6330 useless extension candidates. Maximal degree in co-relation 32311. Up to 5218 conditions per place. [2025-03-08 17:30:45,906 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 352 selfloop transitions, 62 changer transitions 7/422 dead transitions. [2025-03-08 17:30:45,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 422 transitions, 7940 flow [2025-03-08 17:30:45,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 17:30:45,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-08 17:30:45,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2025-03-08 17:30:45,906 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36752136752136755 [2025-03-08 17:30:45,907 INFO L175 Difference]: Start difference. First operand has 284 places, 371 transitions, 6490 flow. Second operand 9 states and 86 transitions. [2025-03-08 17:30:45,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 422 transitions, 7940 flow [2025-03-08 17:30:46,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 422 transitions, 7854 flow, removed 10 selfloop flow, removed 10 redundant places. [2025-03-08 17:30:46,281 INFO L231 Difference]: Finished difference. Result has 284 places, 386 transitions, 6874 flow [2025-03-08 17:30:46,281 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6383, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6874, PETRI_PLACES=284, PETRI_TRANSITIONS=386} [2025-03-08 17:30:46,282 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 259 predicate places. [2025-03-08 17:30:46,282 INFO L471 AbstractCegarLoop]: Abstraction has has 284 places, 386 transitions, 6874 flow [2025-03-08 17:30:46,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:46,282 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:46,282 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:46,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2025-03-08 17:30:46,282 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:46,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:46,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1587755908, now seen corresponding path program 21 times [2025-03-08 17:30:46,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:46,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579573894] [2025-03-08 17:30:46,283 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:30:46,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:46,288 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 3 equivalence classes. [2025-03-08 17:30:46,297 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 27 statements. [2025-03-08 17:30:46,297 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:30:46,297 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:46,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:46,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579573894] [2025-03-08 17:30:46,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579573894] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:46,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046564485] [2025-03-08 17:30:46,527 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:30:46,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:46,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:46,529 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:30:46,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-08 17:30:46,594 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 3 equivalence classes. [2025-03-08 17:30:46,611 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 27 statements. [2025-03-08 17:30:46,611 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:30:46,611 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:46,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-08 17:30:46,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:46,720 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 91 treesize of output 59 [2025-03-08 17:30:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:46,776 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:46,869 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:46,869 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 54 treesize of output 30 [2025-03-08 17:30:46,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:46,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046564485] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:46,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:46,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 22 [2025-03-08 17:30:46,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728474383] [2025-03-08 17:30:46,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:46,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 17:30:46,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:46,920 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 17:30:46,920 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2025-03-08 17:30:46,920 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:30:46,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 386 transitions, 6874 flow. Second operand has 22 states, 22 states have (on average 5.363636363636363) internal successors, (118), 22 states have internal predecessors, (118), 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) [2025-03-08 17:30:46,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:46,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:30:46,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:47,940 INFO L124 PetriNetUnfolderBase]: 3411/6263 cut-off events. [2025-03-08 17:30:47,940 INFO L125 PetriNetUnfolderBase]: For 63953/63953 co-relation queries the response was YES. [2025-03-08 17:30:47,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33771 conditions, 6263 events. 3411/6263 cut-off events. For 63953/63953 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 44014 event pairs, 1446 based on Foata normal form. 2/6265 useless extension candidates. Maximal degree in co-relation 33697. Up to 3185 conditions per place. [2025-03-08 17:30:47,992 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 268 selfloop transitions, 167 changer transitions 15/451 dead transitions. [2025-03-08 17:30:47,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 451 transitions, 8142 flow [2025-03-08 17:30:47,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-08 17:30:47,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-08 17:30:47,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 163 transitions. [2025-03-08 17:30:47,993 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3482905982905983 [2025-03-08 17:30:47,993 INFO L175 Difference]: Start difference. First operand has 284 places, 386 transitions, 6874 flow. Second operand 18 states and 163 transitions. [2025-03-08 17:30:47,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 451 transitions, 8142 flow [2025-03-08 17:30:48,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 451 transitions, 8008 flow, removed 21 selfloop flow, removed 5 redundant places. [2025-03-08 17:30:48,400 INFO L231 Difference]: Finished difference. Result has 298 places, 391 transitions, 7192 flow [2025-03-08 17:30:48,400 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6754, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7192, PETRI_PLACES=298, PETRI_TRANSITIONS=391} [2025-03-08 17:30:48,400 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 273 predicate places. [2025-03-08 17:30:48,400 INFO L471 AbstractCegarLoop]: Abstraction has has 298 places, 391 transitions, 7192 flow [2025-03-08 17:30:48,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.363636363636363) internal successors, (118), 22 states have internal predecessors, (118), 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) [2025-03-08 17:30:48,400 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:48,401 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:48,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-08 17:30:48,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:48,601 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:48,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:48,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1384210962, now seen corresponding path program 22 times [2025-03-08 17:30:48,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:48,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369552656] [2025-03-08 17:30:48,602 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:30:48,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:48,607 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-03-08 17:30:48,620 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:30:48,620 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:30:48,620 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:48,869 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:48,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:48,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369552656] [2025-03-08 17:30:48,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369552656] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:48,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103616248] [2025-03-08 17:30:48,869 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:30:48,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:48,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:48,871 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:30:48,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-08 17:30:48,938 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-03-08 17:30:48,954 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:30:48,955 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:30:48,955 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:48,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-08 17:30:48,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:49,044 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:49,044 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:49,138 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:49,138 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 51 treesize of output 27 [2025-03-08 17:30:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:49,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103616248] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:49,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:49,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2025-03-08 17:30:49,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848710829] [2025-03-08 17:30:49,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:49,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:30:49,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:49,183 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:30:49,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:30:49,184 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:30:49,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 391 transitions, 7192 flow. Second operand has 19 states, 19 states have (on average 6.2631578947368425) internal successors, (119), 19 states have internal predecessors, (119), 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) [2025-03-08 17:30:49,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:49,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:30:49,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:50,203 INFO L124 PetriNetUnfolderBase]: 3443/6291 cut-off events. [2025-03-08 17:30:50,203 INFO L125 PetriNetUnfolderBase]: For 76448/76448 co-relation queries the response was YES. [2025-03-08 17:30:50,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36032 conditions, 6291 events. 3443/6291 cut-off events. For 76448/76448 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 44173 event pairs, 2224 based on Foata normal form. 24/6315 useless extension candidates. Maximal degree in co-relation 35954. Up to 5289 conditions per place. [2025-03-08 17:30:50,258 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 373 selfloop transitions, 50 changer transitions 5/429 dead transitions. [2025-03-08 17:30:50,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 429 transitions, 8393 flow [2025-03-08 17:30:50,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 17:30:50,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-08 17:30:50,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 91 transitions. [2025-03-08 17:30:50,259 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2025-03-08 17:30:50,259 INFO L175 Difference]: Start difference. First operand has 298 places, 391 transitions, 7192 flow. Second operand 9 states and 91 transitions. [2025-03-08 17:30:50,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 429 transitions, 8393 flow [2025-03-08 17:30:50,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 429 transitions, 8292 flow, removed 8 selfloop flow, removed 10 redundant places. [2025-03-08 17:30:50,777 INFO L231 Difference]: Finished difference. Result has 295 places, 394 transitions, 7286 flow [2025-03-08 17:30:50,777 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=7072, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7286, PETRI_PLACES=295, PETRI_TRANSITIONS=394} [2025-03-08 17:30:50,777 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 270 predicate places. [2025-03-08 17:30:50,778 INFO L471 AbstractCegarLoop]: Abstraction has has 295 places, 394 transitions, 7286 flow [2025-03-08 17:30:50,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.2631578947368425) internal successors, (119), 19 states have internal predecessors, (119), 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) [2025-03-08 17:30:50,778 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:50,778 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:50,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-03-08 17:30:50,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2025-03-08 17:30:50,979 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:50,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:50,979 INFO L85 PathProgramCache]: Analyzing trace with hash 345252636, now seen corresponding path program 23 times [2025-03-08 17:30:50,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:50,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286485428] [2025-03-08 17:30:50,979 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:30:50,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:50,985 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 3 equivalence classes. [2025-03-08 17:30:50,990 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:30:50,990 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-08 17:30:50,990 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:51,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:51,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:51,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286485428] [2025-03-08 17:30:51,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286485428] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:51,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403770788] [2025-03-08 17:30:51,115 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:30:51,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:51,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:51,118 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:30:51,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-08 17:30:51,194 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 3 equivalence classes. [2025-03-08 17:30:51,215 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:30:51,215 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-08 17:30:51,215 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:51,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-08 17:30:51,217 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:51,308 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 112 treesize of output 72 [2025-03-08 17:30:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:51,333 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:51,419 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:51,419 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 87 treesize of output 47 [2025-03-08 17:30:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:51,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403770788] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:51,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:51,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-03-08 17:30:51,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219164133] [2025-03-08 17:30:51,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:51,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 17:30:51,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:51,454 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 17:30:51,454 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2025-03-08 17:30:51,454 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:30:51,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 394 transitions, 7286 flow. Second operand has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 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) [2025-03-08 17:30:51,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:51,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:30:51,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:52,429 INFO L124 PetriNetUnfolderBase]: 3456/6295 cut-off events. [2025-03-08 17:30:52,430 INFO L125 PetriNetUnfolderBase]: For 77468/77468 co-relation queries the response was YES. [2025-03-08 17:30:52,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36241 conditions, 6295 events. 3456/6295 cut-off events. For 77468/77468 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 44018 event pairs, 2190 based on Foata normal form. 27/6322 useless extension candidates. Maximal degree in co-relation 36163. Up to 5154 conditions per place. [2025-03-08 17:30:52,475 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 365 selfloop transitions, 53 changer transitions 4/423 dead transitions. [2025-03-08 17:30:52,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 423 transitions, 8345 flow [2025-03-08 17:30:52,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 17:30:52,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-08 17:30:52,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2025-03-08 17:30:52,476 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45604395604395603 [2025-03-08 17:30:52,476 INFO L175 Difference]: Start difference. First operand has 295 places, 394 transitions, 7286 flow. Second operand 7 states and 83 transitions. [2025-03-08 17:30:52,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 423 transitions, 8345 flow [2025-03-08 17:30:52,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 423 transitions, 8207 flow, removed 17 selfloop flow, removed 10 redundant places. [2025-03-08 17:30:52,885 INFO L231 Difference]: Finished difference. Result has 292 places, 389 transitions, 7208 flow [2025-03-08 17:30:52,885 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=7031, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7208, PETRI_PLACES=292, PETRI_TRANSITIONS=389} [2025-03-08 17:30:52,885 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 267 predicate places. [2025-03-08 17:30:52,885 INFO L471 AbstractCegarLoop]: Abstraction has has 292 places, 389 transitions, 7208 flow [2025-03-08 17:30:52,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 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) [2025-03-08 17:30:52,885 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:52,885 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:52,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2025-03-08 17:30:53,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2025-03-08 17:30:53,086 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:53,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:53,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1772454774, now seen corresponding path program 24 times [2025-03-08 17:30:53,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:53,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041968485] [2025-03-08 17:30:53,086 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:30:53,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:53,092 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 3 equivalence classes. [2025-03-08 17:30:53,104 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:30:53,104 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 17:30:53,104 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:53,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:53,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:53,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041968485] [2025-03-08 17:30:53,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041968485] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:53,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702621845] [2025-03-08 17:30:53,373 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:30:53,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:53,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:53,374 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:30:53,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-08 17:30:53,450 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 3 equivalence classes. [2025-03-08 17:30:53,471 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:30:53,471 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-08 17:30:53,471 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:53,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-08 17:30:53,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:53,785 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 91 treesize of output 59 [2025-03-08 17:30:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:53,814 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:53,992 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:53,993 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 117 treesize of output 69 [2025-03-08 17:30:54,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:54,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702621845] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:54,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:54,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 22 [2025-03-08 17:30:54,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502235414] [2025-03-08 17:30:54,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:54,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-08 17:30:54,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:54,030 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-08 17:30:54,032 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2025-03-08 17:30:54,033 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:30:54,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 389 transitions, 7208 flow. Second operand has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 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) [2025-03-08 17:30:54,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:54,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:30:54,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:55,298 INFO L124 PetriNetUnfolderBase]: 3471/6301 cut-off events. [2025-03-08 17:30:55,298 INFO L125 PetriNetUnfolderBase]: For 76977/76977 co-relation queries the response was YES. [2025-03-08 17:30:55,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36337 conditions, 6301 events. 3471/6301 cut-off events. For 76977/76977 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 43927 event pairs, 907 based on Foata normal form. 21/6322 useless extension candidates. Maximal degree in co-relation 36261. Up to 2361 conditions per place. [2025-03-08 17:30:55,351 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 283 selfloop transitions, 231 changer transitions 6/521 dead transitions. [2025-03-08 17:30:55,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 521 transitions, 9718 flow [2025-03-08 17:30:55,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 17:30:55,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-08 17:30:55,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 185 transitions. [2025-03-08 17:30:55,352 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37449392712550605 [2025-03-08 17:30:55,352 INFO L175 Difference]: Start difference. First operand has 292 places, 389 transitions, 7208 flow. Second operand 19 states and 185 transitions. [2025-03-08 17:30:55,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 521 transitions, 9718 flow [2025-03-08 17:30:55,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 521 transitions, 9559 flow, removed 29 selfloop flow, removed 9 redundant places. [2025-03-08 17:30:55,796 INFO L231 Difference]: Finished difference. Result has 303 places, 426 transitions, 8570 flow [2025-03-08 17:30:55,796 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6939, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8570, PETRI_PLACES=303, PETRI_TRANSITIONS=426} [2025-03-08 17:30:55,797 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 278 predicate places. [2025-03-08 17:30:55,797 INFO L471 AbstractCegarLoop]: Abstraction has has 303 places, 426 transitions, 8570 flow [2025-03-08 17:30:55,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.545454545454546) internal successors, (122), 22 states have internal predecessors, (122), 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) [2025-03-08 17:30:55,797 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:55,797 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:55,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2025-03-08 17:30:55,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2025-03-08 17:30:55,998 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:55,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:55,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1542192074, now seen corresponding path program 25 times [2025-03-08 17:30:55,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:55,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244950155] [2025-03-08 17:30:55,998 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:30:55,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:56,003 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-08 17:30:56,010 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:30:56,010 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:30:56,010 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:56,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:56,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:56,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244950155] [2025-03-08 17:30:56,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244950155] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:56,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278004253] [2025-03-08 17:30:56,239 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:30:56,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:56,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:56,247 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:30:56,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-08 17:30:56,323 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-08 17:30:56,340 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:30:56,340 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:30:56,340 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:56,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-08 17:30:56,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:56,475 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:56,633 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:56,634 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 51 treesize of output 27 [2025-03-08 17:30:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:56,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278004253] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:56,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:56,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 21 [2025-03-08 17:30:56,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244908536] [2025-03-08 17:30:56,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:56,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-08 17:30:56,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:56,668 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-08 17:30:56,668 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2025-03-08 17:30:56,668 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:30:56,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 426 transitions, 8570 flow. Second operand has 21 states, 21 states have (on average 5.857142857142857) internal successors, (123), 21 states have internal predecessors, (123), 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) [2025-03-08 17:30:56,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:56,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:30:56,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:30:57,758 INFO L124 PetriNetUnfolderBase]: 3270/6007 cut-off events. [2025-03-08 17:30:57,758 INFO L125 PetriNetUnfolderBase]: For 97001/97001 co-relation queries the response was YES. [2025-03-08 17:30:57,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38601 conditions, 6007 events. 3270/6007 cut-off events. For 97001/97001 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 42146 event pairs, 1605 based on Foata normal form. 18/6025 useless extension candidates. Maximal degree in co-relation 38523. Up to 4711 conditions per place. [2025-03-08 17:30:57,811 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 354 selfloop transitions, 123 changer transitions 4/482 dead transitions. [2025-03-08 17:30:57,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 482 transitions, 9975 flow [2025-03-08 17:30:57,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 17:30:57,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-08 17:30:57,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 144 transitions. [2025-03-08 17:30:57,812 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36923076923076925 [2025-03-08 17:30:57,812 INFO L175 Difference]: Start difference. First operand has 303 places, 426 transitions, 8570 flow. Second operand 15 states and 144 transitions. [2025-03-08 17:30:57,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 482 transitions, 9975 flow [2025-03-08 17:30:58,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 482 transitions, 9761 flow, removed 79 selfloop flow, removed 8 redundant places. [2025-03-08 17:30:58,387 INFO L231 Difference]: Finished difference. Result has 312 places, 429 transitions, 8721 flow [2025-03-08 17:30:58,387 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=8340, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8721, PETRI_PLACES=312, PETRI_TRANSITIONS=429} [2025-03-08 17:30:58,388 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 287 predicate places. [2025-03-08 17:30:58,388 INFO L471 AbstractCegarLoop]: Abstraction has has 312 places, 429 transitions, 8721 flow [2025-03-08 17:30:58,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.857142857142857) internal successors, (123), 21 states have internal predecessors, (123), 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) [2025-03-08 17:30:58,388 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:30:58,388 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:30:58,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2025-03-08 17:30:58,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:58,588 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:30:58,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:30:58,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1521275408, now seen corresponding path program 26 times [2025-03-08 17:30:58,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:30:58,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752224793] [2025-03-08 17:30:58,589 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:30:58,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:30:58,595 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-08 17:30:58,602 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:30:58,602 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:30:58,602 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:58,816 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:58,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:30:58,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752224793] [2025-03-08 17:30:58,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752224793] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:30:58,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337251763] [2025-03-08 17:30:58,816 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:30:58,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:30:58,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:30:58,819 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:30:58,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-03-08 17:30:58,895 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-08 17:30:58,917 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:30:58,917 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:30:58,917 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:30:58,919 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-08 17:30:58,920 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:30:59,236 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 82 treesize of output 50 [2025-03-08 17:30:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:59,248 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:30:59,362 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:30:59,363 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 87 treesize of output 55 [2025-03-08 17:30:59,390 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:30:59,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337251763] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:30:59,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:30:59,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2025-03-08 17:30:59,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781086977] [2025-03-08 17:30:59,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:30:59,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:30:59,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:30:59,391 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:30:59,391 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:30:59,391 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:30:59,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 429 transitions, 8721 flow. Second operand has 19 states, 19 states have (on average 5.631578947368421) internal successors, (107), 19 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:30:59,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:30:59,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:30:59,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:00,809 INFO L124 PetriNetUnfolderBase]: 3271/6014 cut-off events. [2025-03-08 17:31:00,809 INFO L125 PetriNetUnfolderBase]: For 88546/88546 co-relation queries the response was YES. [2025-03-08 17:31:00,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36888 conditions, 6014 events. 3271/6014 cut-off events. For 88546/88546 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 42136 event pairs, 902 based on Foata normal form. 2/6016 useless extension candidates. Maximal degree in co-relation 36810. Up to 1938 conditions per place. [2025-03-08 17:31:00,866 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 280 selfloop transitions, 230 changer transitions 9/520 dead transitions. [2025-03-08 17:31:00,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 520 transitions, 10590 flow [2025-03-08 17:31:00,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 17:31:00,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-08 17:31:00,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 164 transitions. [2025-03-08 17:31:00,867 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3319838056680162 [2025-03-08 17:31:00,867 INFO L175 Difference]: Start difference. First operand has 312 places, 429 transitions, 8721 flow. Second operand 19 states and 164 transitions. [2025-03-08 17:31:00,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 520 transitions, 10590 flow [2025-03-08 17:31:01,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 520 transitions, 10469 flow, removed 27 selfloop flow, removed 9 redundant places. [2025-03-08 17:31:01,356 INFO L231 Difference]: Finished difference. Result has 322 places, 438 transitions, 9189 flow [2025-03-08 17:31:01,356 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=8610, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=9189, PETRI_PLACES=322, PETRI_TRANSITIONS=438} [2025-03-08 17:31:01,357 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 297 predicate places. [2025-03-08 17:31:01,357 INFO L471 AbstractCegarLoop]: Abstraction has has 322 places, 438 transitions, 9189 flow [2025-03-08 17:31:01,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.631578947368421) internal successors, (107), 19 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:31:01,357 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:01,357 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:01,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2025-03-08 17:31:01,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:01,557 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:31:01,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:01,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1939305296, now seen corresponding path program 27 times [2025-03-08 17:31:01,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:01,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254369768] [2025-03-08 17:31:01,558 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:31:01,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:01,563 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 3 equivalence classes. [2025-03-08 17:31:01,570 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 27 statements. [2025-03-08 17:31:01,570 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:31:01,570 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:31:01,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:01,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254369768] [2025-03-08 17:31:01,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254369768] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:01,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533723417] [2025-03-08 17:31:01,784 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:31:01,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:01,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:01,786 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:01,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-03-08 17:31:01,857 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 3 equivalence classes. [2025-03-08 17:31:01,873 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 27 statements. [2025-03-08 17:31:01,873 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:31:01,873 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:01,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-08 17:31:01,875 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:31:02,006 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:02,110 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:31:02,110 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 44 treesize of output 28 [2025-03-08 17:31:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:31:02,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533723417] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:02,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:02,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2025-03-08 17:31:02,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948256431] [2025-03-08 17:31:02,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:02,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:31:02,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:02,133 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:31:02,133 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:31:02,133 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:31:02,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 438 transitions, 9189 flow. Second operand has 19 states, 19 states have (on average 6.105263157894737) internal successors, (116), 19 states have internal predecessors, (116), 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) [2025-03-08 17:31:02,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:02,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:31:02,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:03,376 INFO L124 PetriNetUnfolderBase]: 3338/6111 cut-off events. [2025-03-08 17:31:03,377 INFO L125 PetriNetUnfolderBase]: For 96494/96494 co-relation queries the response was YES. [2025-03-08 17:31:03,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38776 conditions, 6111 events. 3338/6111 cut-off events. For 96494/96494 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 42584 event pairs, 407 based on Foata normal form. 20/6131 useless extension candidates. Maximal degree in co-relation 38698. Up to 2367 conditions per place. [2025-03-08 17:31:03,425 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 315 selfloop transitions, 208 changer transitions 3/527 dead transitions. [2025-03-08 17:31:03,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 527 transitions, 11105 flow [2025-03-08 17:31:03,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-08 17:31:03,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-08 17:31:03,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 167 transitions. [2025-03-08 17:31:03,426 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35683760683760685 [2025-03-08 17:31:03,426 INFO L175 Difference]: Start difference. First operand has 322 places, 438 transitions, 9189 flow. Second operand 18 states and 167 transitions. [2025-03-08 17:31:03,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 527 transitions, 11105 flow [2025-03-08 17:31:03,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 527 transitions, 10645 flow, removed 13 selfloop flow, removed 10 redundant places. [2025-03-08 17:31:03,915 INFO L231 Difference]: Finished difference. Result has 331 places, 452 transitions, 9502 flow [2025-03-08 17:31:03,916 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=8744, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=9502, PETRI_PLACES=331, PETRI_TRANSITIONS=452} [2025-03-08 17:31:03,916 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 306 predicate places. [2025-03-08 17:31:03,916 INFO L471 AbstractCegarLoop]: Abstraction has has 331 places, 452 transitions, 9502 flow [2025-03-08 17:31:03,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.105263157894737) internal successors, (116), 19 states have internal predecessors, (116), 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) [2025-03-08 17:31:03,917 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:03,917 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:03,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-03-08 17:31:04,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:04,117 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:31:04,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:31:04,118 INFO L85 PathProgramCache]: Analyzing trace with hash -378453768, now seen corresponding path program 28 times [2025-03-08 17:31:04,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:31:04,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847075138] [2025-03-08 17:31:04,118 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:31:04,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:31:04,123 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-03-08 17:31:04,129 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:31:04,129 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:31:04,129 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:04,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:31:04,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:31:04,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847075138] [2025-03-08 17:31:04,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847075138] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:31:04,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796764469] [2025-03-08 17:31:04,371 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:31:04,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:31:04,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:31:04,373 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:31:04,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-03-08 17:31:04,443 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-03-08 17:31:04,461 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-08 17:31:04,461 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:31:04,461 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:31:04,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-08 17:31:04,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:31:04,610 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 82 treesize of output 50 [2025-03-08 17:31:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:31:04,623 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:31:04,712 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:31:04,712 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 117 treesize of output 61 [2025-03-08 17:31:04,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-08 17:31:04,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796764469] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:31:04,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:31:04,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2025-03-08 17:31:04,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788461256] [2025-03-08 17:31:04,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:31:04,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:31:04,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:31:04,767 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:31:04,767 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:31:04,767 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2025-03-08 17:31:04,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 452 transitions, 9502 flow. Second operand has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 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) [2025-03-08 17:31:04,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:31:04,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2025-03-08 17:31:04,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:31:06,087 INFO L124 PetriNetUnfolderBase]: 3368/6153 cut-off events. [2025-03-08 17:31:06,088 INFO L125 PetriNetUnfolderBase]: For 95959/95959 co-relation queries the response was YES. [2025-03-08 17:31:06,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39248 conditions, 6153 events. 3368/6153 cut-off events. For 95959/95959 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 43026 event pairs, 1316 based on Foata normal form. 2/6155 useless extension candidates. Maximal degree in co-relation 39170. Up to 3062 conditions per place. [2025-03-08 17:31:06,141 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 294 selfloop transitions, 204 changer transitions 8/507 dead transitions. [2025-03-08 17:31:06,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 507 transitions, 10897 flow [2025-03-08 17:31:06,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-08 17:31:06,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-08 17:31:06,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 150 transitions. [2025-03-08 17:31:06,142 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32051282051282054 [2025-03-08 17:31:06,142 INFO L175 Difference]: Start difference. First operand has 331 places, 452 transitions, 9502 flow. Second operand 18 states and 150 transitions. [2025-03-08 17:31:06,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 507 transitions, 10897 flow [2025-03-08 17:31:06,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 507 transitions, 10575 flow, removed 22 selfloop flow, removed 13 redundant places. [2025-03-08 17:31:06,548 INFO L231 Difference]: Finished difference. Result has 335 places, 446 transitions, 9504 flow [2025-03-08 17:31:06,549 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=9100, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=9504, PETRI_PLACES=335, PETRI_TRANSITIONS=446} [2025-03-08 17:31:06,549 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 310 predicate places. [2025-03-08 17:31:06,549 INFO L471 AbstractCegarLoop]: Abstraction has has 335 places, 446 transitions, 9504 flow [2025-03-08 17:31:06,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 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) [2025-03-08 17:31:06,549 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:31:06,549 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:31:06,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0