./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 735b3cc8 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-chromosome-trans.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 f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 --- Real Ultimate output --- This is Ultimate 0.3.0-?-735b3cc-m [2025-03-14 01:00:45,448 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-14 01:00:45,507 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-14 01:00:45,513 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-14 01:00:45,514 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-14 01:00:45,533 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-14 01:00:45,534 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-14 01:00:45,534 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-14 01:00:45,534 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-14 01:00:45,534 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-14 01:00:45,535 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-14 01:00:45,535 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-14 01:00:45,536 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-14 01:00:45,536 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-14 01:00:45,536 INFO L153 SettingsManager]: * Use SBE=true [2025-03-14 01:00:45,536 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-14 01:00:45,536 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-14 01:00:45,536 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-14 01:00:45,536 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-14 01:00:45,537 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-14 01:00:45,537 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-14 01:00:45,537 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-14 01:00:45,537 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-14 01:00:45,537 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-14 01:00:45,537 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-14 01:00:45,537 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-14 01:00:45,537 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-14 01:00:45,537 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-14 01:00:45,537 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-14 01:00:45,537 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-14 01:00:45,538 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-14 01:00:45,538 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-14 01:00:45,538 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-14 01:00:45,538 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-14 01:00:45,538 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-14 01:00:45,538 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-14 01:00:45,538 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-14 01:00:45,538 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-14 01:00:45,538 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-14 01:00:45,538 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-14 01:00:45,539 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-14 01:00:45,539 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-14 01:00:45,539 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-14 01:00:45,539 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 -> f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 [2025-03-14 01:00:45,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-14 01:00:45,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-14 01:00:45,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-14 01:00:45,777 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-14 01:00:45,777 INFO L274 PluginConnector]: CDTParser initialized [2025-03-14 01:00:45,778 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2025-03-14 01:00:46,921 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09d31a9be/8435337be74d4e3d8cffab634b4be805/FLAG0dd58c2aa [2025-03-14 01:00:47,183 INFO L384 CDTParser]: Found 1 translation units. [2025-03-14 01:00:47,184 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2025-03-14 01:00:47,191 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09d31a9be/8435337be74d4e3d8cffab634b4be805/FLAG0dd58c2aa [2025-03-14 01:00:47,212 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09d31a9be/8435337be74d4e3d8cffab634b4be805 [2025-03-14 01:00:47,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-14 01:00:47,215 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-14 01:00:47,216 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-14 01:00:47,216 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-14 01:00:47,220 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-14 01:00:47,221 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.03 01:00:47" (1/1) ... [2025-03-14 01:00:47,222 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b8d8ad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:00:47, skipping insertion in model container [2025-03-14 01:00:47,222 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.03 01:00:47" (1/1) ... [2025-03-14 01:00:47,245 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-14 01:00:47,382 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-chromosome-trans.wvr.c[3073,3086] [2025-03-14 01:00:47,393 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-14 01:00:47,403 INFO L200 MainTranslator]: Completed pre-run [2025-03-14 01:00:47,424 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-chromosome-trans.wvr.c[3073,3086] [2025-03-14 01:00:47,429 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-14 01:00:47,442 INFO L204 MainTranslator]: Completed translation [2025-03-14 01:00:47,443 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:00:47 WrapperNode [2025-03-14 01:00:47,443 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-14 01:00:47,444 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-14 01:00:47,444 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-14 01:00:47,444 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-14 01:00:47,448 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:00:47" (1/1) ... [2025-03-14 01:00:47,457 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:00:47" (1/1) ... [2025-03-14 01:00:47,479 INFO L138 Inliner]: procedures = 25, calls = 31, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 249 [2025-03-14 01:00:47,479 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-14 01:00:47,480 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-14 01:00:47,480 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-14 01:00:47,480 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-14 01:00:47,485 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:00:47" (1/1) ... [2025-03-14 01:00:47,485 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:00:47" (1/1) ... [2025-03-14 01:00:47,488 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:00:47" (1/1) ... [2025-03-14 01:00:47,504 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-03-14 01:00:47,509 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:00:47" (1/1) ... [2025-03-14 01:00:47,509 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:00:47" (1/1) ... [2025-03-14 01:00:47,517 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:00:47" (1/1) ... [2025-03-14 01:00:47,518 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:00:47" (1/1) ... [2025-03-14 01:00:47,519 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:00:47" (1/1) ... [2025-03-14 01:00:47,520 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:00:47" (1/1) ... [2025-03-14 01:00:47,521 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-14 01:00:47,522 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-14 01:00:47,522 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-14 01:00:47,522 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-14 01:00:47,523 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:00:47" (1/1) ... [2025-03-14 01:00:47,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-14 01:00:47,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:00:47,549 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) [2025-03-14 01:00:47,551 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 [2025-03-14 01:00:47,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-14 01:00:47,569 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-14 01:00:47,569 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-14 01:00:47,569 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-14 01:00:47,569 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-14 01:00:47,569 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-14 01:00:47,569 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-14 01:00:47,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-14 01:00:47,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-14 01:00:47,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-14 01:00:47,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-14 01:00:47,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-14 01:00:47,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-14 01:00:47,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-14 01:00:47,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-14 01:00:47,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-14 01:00:47,570 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-14 01:00:47,652 INFO L256 CfgBuilder]: Building ICFG [2025-03-14 01:00:47,653 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-14 01:00:47,956 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-14 01:00:47,957 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-14 01:00:47,958 INFO L318 CfgBuilder]: Performing block encoding [2025-03-14 01:00:48,246 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-14 01:00:48,246 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.03 01:00:48 BoogieIcfgContainer [2025-03-14 01:00:48,246 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-14 01:00:48,248 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-14 01:00:48,248 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-14 01:00:48,251 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-14 01:00:48,252 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.03 01:00:47" (1/3) ... [2025-03-14 01:00:48,252 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5177f4e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.03 01:00:48, skipping insertion in model container [2025-03-14 01:00:48,253 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:00:47" (2/3) ... [2025-03-14 01:00:48,253 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5177f4e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.03 01:00:48, skipping insertion in model container [2025-03-14 01:00:48,253 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.03 01:00:48" (3/3) ... [2025-03-14 01:00:48,254 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2025-03-14 01:00:48,264 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-14 01:00:48,265 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-chromosome-trans.wvr.c that has 4 procedures, 26 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2025-03-14 01:00:48,265 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-14 01:00:48,308 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-14 01:00:48,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 31 transitions, 83 flow [2025-03-14 01:00:48,357 INFO L124 PetriNetUnfolderBase]: 6/28 cut-off events. [2025-03-14 01:00:48,361 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-14 01:00:48,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 28 events. 6/28 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2025-03-14 01:00:48,365 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 31 transitions, 83 flow [2025-03-14 01:00:48,369 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 27 transitions, 72 flow [2025-03-14 01:00:48,375 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-14 01:00:48,385 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;@2600ac82, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-14 01:00:48,386 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-14 01:00:48,395 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-14 01:00:48,395 INFO L124 PetriNetUnfolderBase]: 6/26 cut-off events. [2025-03-14 01:00:48,395 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-14 01:00:48,395 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:00:48,395 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:00:48,396 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:00:48,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:00:48,399 INFO L85 PathProgramCache]: Analyzing trace with hash 2043801596, now seen corresponding path program 1 times [2025-03-14 01:00:48,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:00:48,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866644137] [2025-03-14 01:00:48,404 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:00:48,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:00:48,478 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-14 01:00:48,527 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-14 01:00:48,528 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:00:48,529 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:00:48,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:00:48,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:00:48,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866644137] [2025-03-14 01:00:48,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866644137] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:00:48,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:00:48,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-14 01:00:48,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276438859] [2025-03-14 01:00:48,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:00:48,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-14 01:00:48,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:00:48,866 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-14 01:00:48,866 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-14 01:00:48,868 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:00:48,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 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) [2025-03-14 01:00:48,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:00:48,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:00:48,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:00:49,066 INFO L124 PetriNetUnfolderBase]: 306/448 cut-off events. [2025-03-14 01:00:49,067 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2025-03-14 01:00:49,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 448 events. 306/448 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1204 event pairs, 124 based on Foata normal form. 1/323 useless extension candidates. Maximal degree in co-relation 786. Up to 299 conditions per place. [2025-03-14 01:00:49,070 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 34 selfloop transitions, 2 changer transitions 2/39 dead transitions. [2025-03-14 01:00:49,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 39 transitions, 181 flow [2025-03-14 01:00:49,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-14 01:00:49,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-14 01:00:49,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2025-03-14 01:00:49,078 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5483870967741935 [2025-03-14 01:00:49,079 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 72 flow. Second operand 3 states and 51 transitions. [2025-03-14 01:00:49,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 39 transitions, 181 flow [2025-03-14 01:00:49,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 39 transitions, 163 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-14 01:00:49,087 INFO L231 Difference]: Finished difference. Result has 28 places, 28 transitions, 72 flow [2025-03-14 01:00:49,088 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=28, PETRI_TRANSITIONS=28} [2025-03-14 01:00:49,090 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2025-03-14 01:00:49,090 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 28 transitions, 72 flow [2025-03-14 01:00:49,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 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) [2025-03-14 01:00:49,090 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:00:49,090 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:00:49,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-14 01:00:49,091 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:00:49,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:00:49,091 INFO L85 PathProgramCache]: Analyzing trace with hash 996305737, now seen corresponding path program 1 times [2025-03-14 01:00:49,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:00:49,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628496218] [2025-03-14 01:00:49,091 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:00:49,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:00:49,105 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-14 01:00:49,120 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-14 01:00:49,120 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:00:49,120 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:00:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:00:49,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:00:49,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628496218] [2025-03-14 01:00:49,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628496218] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:00:49,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:00:49,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-14 01:00:49,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287910574] [2025-03-14 01:00:49,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:00:49,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-14 01:00:49,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:00:49,220 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-14 01:00:49,221 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-14 01:00:49,221 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:00:49,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 28 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2025-03-14 01:00:49,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:00:49,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:00:49,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:00:49,334 INFO L124 PetriNetUnfolderBase]: 306/451 cut-off events. [2025-03-14 01:00:49,335 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2025-03-14 01:00:49,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1007 conditions, 451 events. 306/451 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1193 event pairs, 202 based on Foata normal form. 0/369 useless extension candidates. Maximal degree in co-relation 271. Up to 448 conditions per place. [2025-03-14 01:00:49,339 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 24 selfloop transitions, 6 changer transitions 0/31 dead transitions. [2025-03-14 01:00:49,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 31 transitions, 138 flow [2025-03-14 01:00:49,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-14 01:00:49,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-14 01:00:49,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2025-03-14 01:00:49,341 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4731182795698925 [2025-03-14 01:00:49,341 INFO L175 Difference]: Start difference. First operand has 28 places, 28 transitions, 72 flow. Second operand 3 states and 44 transitions. [2025-03-14 01:00:49,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 31 transitions, 138 flow [2025-03-14 01:00:49,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 31 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-14 01:00:49,344 INFO L231 Difference]: Finished difference. Result has 30 places, 31 transitions, 102 flow [2025-03-14 01:00:49,344 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=30, PETRI_TRANSITIONS=31} [2025-03-14 01:00:49,345 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2025-03-14 01:00:49,345 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 31 transitions, 102 flow [2025-03-14 01:00:49,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2025-03-14 01:00:49,345 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:00:49,345 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:00:49,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-14 01:00:49,346 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:00:49,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:00:49,347 INFO L85 PathProgramCache]: Analyzing trace with hash -2078689962, now seen corresponding path program 1 times [2025-03-14 01:00:49,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:00:49,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728237726] [2025-03-14 01:00:49,347 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:00:49,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:00:49,364 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-14 01:00:49,386 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-14 01:00:49,388 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:00:49,388 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:00:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-14 01:00:49,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:00:49,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728237726] [2025-03-14 01:00:49,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728237726] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:00:49,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124037179] [2025-03-14 01:00:49,490 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:00:49,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:00:49,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:00:49,492 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) [2025-03-14 01:00:49,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-14 01:00:49,559 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-14 01:00:49,596 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-14 01:00:49,597 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:00:49,597 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:00:49,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-14 01:00:49,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:00:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-14 01:00:49,650 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:00:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-14 01:00:49,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124037179] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:00:49,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:00:49,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2025-03-14 01:00:49,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35725462] [2025-03-14 01:00:49,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:00:49,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-14 01:00:49,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:00:49,670 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-14 01:00:49,670 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2025-03-14 01:00:49,671 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:00:49,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 31 transitions, 102 flow. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:00:49,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:00:49,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:00:49,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:00:49,796 INFO L124 PetriNetUnfolderBase]: 306/460 cut-off events. [2025-03-14 01:00:49,796 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2025-03-14 01:00:49,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1026 conditions, 460 events. 306/460 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1193 event pairs, 202 based on Foata normal form. 6/386 useless extension candidates. Maximal degree in co-relation 976. Up to 448 conditions per place. [2025-03-14 01:00:49,799 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 24 selfloop transitions, 15 changer transitions 0/40 dead transitions. [2025-03-14 01:00:49,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 216 flow [2025-03-14 01:00:49,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-14 01:00:49,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-14 01:00:49,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 71 transitions. [2025-03-14 01:00:49,800 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2025-03-14 01:00:49,800 INFO L175 Difference]: Start difference. First operand has 30 places, 31 transitions, 102 flow. Second operand 6 states and 71 transitions. [2025-03-14 01:00:49,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 216 flow [2025-03-14 01:00:49,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-14 01:00:49,802 INFO L231 Difference]: Finished difference. Result has 37 places, 40 transitions, 192 flow [2025-03-14 01:00:49,802 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=37, PETRI_TRANSITIONS=40} [2025-03-14 01:00:49,802 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2025-03-14 01:00:49,802 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 40 transitions, 192 flow [2025-03-14 01:00:49,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:00:49,803 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:00:49,803 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:00:49,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-14 01:00:50,007 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 [2025-03-14 01:00:50,007 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:00:50,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:00:50,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1240161033, now seen corresponding path program 2 times [2025-03-14 01:00:50,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:00:50,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744746118] [2025-03-14 01:00:50,008 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:00:50,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:00:50,028 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-03-14 01:00:50,052 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 21 of 34 statements. [2025-03-14 01:00:50,052 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-14 01:00:50,053 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:00:50,210 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-14 01:00:50,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:00:50,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744746118] [2025-03-14 01:00:50,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744746118] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:00:50,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:00:50,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-14 01:00:50,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751346775] [2025-03-14 01:00:50,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:00:50,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-14 01:00:50,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:00:50,211 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-14 01:00:50,211 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-14 01:00:50,211 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:00:50,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 40 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:00:50,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:00:50,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:00:50,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:00:50,393 INFO L124 PetriNetUnfolderBase]: 502/756 cut-off events. [2025-03-14 01:00:50,393 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2025-03-14 01:00:50,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1704 conditions, 756 events. 502/756 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2561 event pairs, 202 based on Foata normal form. 17/625 useless extension candidates. Maximal degree in co-relation 1615. Up to 460 conditions per place. [2025-03-14 01:00:50,399 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 63 selfloop transitions, 3 changer transitions 2/69 dead transitions. [2025-03-14 01:00:50,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 69 transitions, 407 flow [2025-03-14 01:00:50,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-14 01:00:50,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-14 01:00:50,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2025-03-14 01:00:50,400 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5645161290322581 [2025-03-14 01:00:50,400 INFO L175 Difference]: Start difference. First operand has 37 places, 40 transitions, 192 flow. Second operand 4 states and 70 transitions. [2025-03-14 01:00:50,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 69 transitions, 407 flow [2025-03-14 01:00:50,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 69 transitions, 383 flow, removed 9 selfloop flow, removed 1 redundant places. [2025-03-14 01:00:50,404 INFO L231 Difference]: Finished difference. Result has 41 places, 42 transitions, 188 flow [2025-03-14 01:00:50,404 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=41, PETRI_TRANSITIONS=42} [2025-03-14 01:00:50,405 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 10 predicate places. [2025-03-14 01:00:50,405 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 42 transitions, 188 flow [2025-03-14 01:00:50,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:00:50,405 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:00:50,405 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:00:50,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-14 01:00:50,405 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:00:50,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:00:50,405 INFO L85 PathProgramCache]: Analyzing trace with hash 666430253, now seen corresponding path program 3 times [2025-03-14 01:00:50,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:00:50,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046346026] [2025-03-14 01:00:50,406 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:00:50,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:00:50,418 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 34 statements into 3 equivalence classes. [2025-03-14 01:00:50,429 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 21 of 34 statements. [2025-03-14 01:00:50,429 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-14 01:00:50,429 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:00:50,531 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-14 01:00:50,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:00:50,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046346026] [2025-03-14 01:00:50,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046346026] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:00:50,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:00:50,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-14 01:00:50,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979782499] [2025-03-14 01:00:50,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:00:50,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-14 01:00:50,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:00:50,534 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-14 01:00:50,534 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-14 01:00:50,534 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:00:50,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 42 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:00:50,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:00:50,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:00:50,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:00:50,700 INFO L124 PetriNetUnfolderBase]: 560/838 cut-off events. [2025-03-14 01:00:50,700 INFO L125 PetriNetUnfolderBase]: For 440/440 co-relation queries the response was YES. [2025-03-14 01:00:50,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2240 conditions, 838 events. 560/838 cut-off events. For 440/440 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2945 event pairs, 97 based on Foata normal form. 24/740 useless extension candidates. Maximal degree in co-relation 2160. Up to 567 conditions per place. [2025-03-14 01:00:50,704 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 58 selfloop transitions, 5 changer transitions 1/65 dead transitions. [2025-03-14 01:00:50,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 65 transitions, 394 flow [2025-03-14 01:00:50,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-14 01:00:50,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-14 01:00:50,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2025-03-14 01:00:50,706 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-03-14 01:00:50,706 INFO L175 Difference]: Start difference. First operand has 41 places, 42 transitions, 188 flow. Second operand 4 states and 62 transitions. [2025-03-14 01:00:50,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 65 transitions, 394 flow [2025-03-14 01:00:50,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 65 transitions, 383 flow, removed 3 selfloop flow, removed 1 redundant places. [2025-03-14 01:00:50,709 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 213 flow [2025-03-14 01:00:50,710 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=213, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2025-03-14 01:00:50,710 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 14 predicate places. [2025-03-14 01:00:50,711 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 213 flow [2025-03-14 01:00:50,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:00:50,711 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:00:50,711 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:00:50,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-14 01:00:50,712 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:00:50,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:00:50,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1625277359, now seen corresponding path program 4 times [2025-03-14 01:00:50,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:00:50,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075076429] [2025-03-14 01:00:50,712 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 01:00:50,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:00:50,726 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 34 statements into 2 equivalence classes. [2025-03-14 01:00:50,744 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-14 01:00:50,744 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 01:00:50,744 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:00:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-14 01:00:50,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:00:50,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075076429] [2025-03-14 01:00:50,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075076429] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:00:50,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945363722] [2025-03-14 01:00:50,857 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 01:00:50,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:00:50,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:00:50,859 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) [2025-03-14 01:00:50,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-14 01:00:50,937 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 34 statements into 2 equivalence classes. [2025-03-14 01:00:50,971 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-14 01:00:50,971 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 01:00:50,971 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:00:50,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-14 01:00:50,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:00:51,023 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-14 01:00:51,023 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:00:51,056 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-14 01:00:51,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945363722] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:00:51,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:00:51,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-03-14 01:00:51,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110217311] [2025-03-14 01:00:51,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:00:51,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-14 01:00:51,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:00:51,057 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-14 01:00:51,057 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2025-03-14 01:00:51,057 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:00:51,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 213 flow. Second operand has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 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) [2025-03-14 01:00:51,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:00:51,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:00:51,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:00:51,192 INFO L124 PetriNetUnfolderBase]: 560/841 cut-off events. [2025-03-14 01:00:51,193 INFO L125 PetriNetUnfolderBase]: For 911/911 co-relation queries the response was YES. [2025-03-14 01:00:51,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2372 conditions, 841 events. 560/841 cut-off events. For 911/911 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2698 event pairs, 371 based on Foata normal form. 1/720 useless extension candidates. Maximal degree in co-relation 2277. Up to 825 conditions per place. [2025-03-14 01:00:51,199 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 28 selfloop transitions, 18 changer transitions 0/47 dead transitions. [2025-03-14 01:00:51,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 47 transitions, 323 flow [2025-03-14 01:00:51,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-14 01:00:51,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-14 01:00:51,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 72 transitions. [2025-03-14 01:00:51,201 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3317972350230415 [2025-03-14 01:00:51,201 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 213 flow. Second operand 7 states and 72 transitions. [2025-03-14 01:00:51,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 47 transitions, 323 flow [2025-03-14 01:00:51,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 47 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-14 01:00:51,203 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 278 flow [2025-03-14 01:00:51,203 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=278, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2025-03-14 01:00:51,204 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 20 predicate places. [2025-03-14 01:00:51,204 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 278 flow [2025-03-14 01:00:51,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 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) [2025-03-14 01:00:51,204 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:00:51,204 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:00:51,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-14 01:00:51,404 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,SelfDestructingSolverStorable5 [2025-03-14 01:00:51,405 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:00:51,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:00:51,405 INFO L85 PathProgramCache]: Analyzing trace with hash -48956378, now seen corresponding path program 5 times [2025-03-14 01:00:51,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:00:51,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867036636] [2025-03-14 01:00:51,406 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 01:00:51,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:00:51,423 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 37 statements into 4 equivalence classes. [2025-03-14 01:00:51,447 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 37 of 37 statements. [2025-03-14 01:00:51,448 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-14 01:00:51,448 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:00:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-14 01:00:51,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:00:51,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867036636] [2025-03-14 01:00:51,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867036636] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:00:51,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:00:51,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-14 01:00:51,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839931861] [2025-03-14 01:00:51,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:00:51,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-14 01:00:51,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:00:51,671 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-14 01:00:51,671 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-14 01:00:51,672 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:00:51,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 278 flow. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 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) [2025-03-14 01:00:51,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:00:51,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:00:51,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:00:51,916 INFO L124 PetriNetUnfolderBase]: 986/1483 cut-off events. [2025-03-14 01:00:51,918 INFO L125 PetriNetUnfolderBase]: For 1272/1272 co-relation queries the response was YES. [2025-03-14 01:00:51,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4091 conditions, 1483 events. 986/1483 cut-off events. For 1272/1272 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5996 event pairs, 359 based on Foata normal form. 16/1269 useless extension candidates. Maximal degree in co-relation 3976. Up to 869 conditions per place. [2025-03-14 01:00:51,925 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 73 selfloop transitions, 3 changer transitions 14/91 dead transitions. [2025-03-14 01:00:51,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 91 transitions, 635 flow [2025-03-14 01:00:51,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-14 01:00:51,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-14 01:00:51,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2025-03-14 01:00:51,928 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2025-03-14 01:00:51,928 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 278 flow. Second operand 5 states and 80 transitions. [2025-03-14 01:00:51,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 91 transitions, 635 flow [2025-03-14 01:00:51,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 91 transitions, 599 flow, removed 6 selfloop flow, removed 4 redundant places. [2025-03-14 01:00:51,933 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 264 flow [2025-03-14 01:00:51,933 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2025-03-14 01:00:51,934 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 23 predicate places. [2025-03-14 01:00:51,935 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 264 flow [2025-03-14 01:00:51,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 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) [2025-03-14 01:00:51,935 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:00:51,935 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:00:51,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-14 01:00:51,935 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:00:51,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:00:51,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1474570276, now seen corresponding path program 6 times [2025-03-14 01:00:51,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:00:51,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832608412] [2025-03-14 01:00:51,936 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-14 01:00:51,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:00:51,950 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 37 statements into 4 equivalence classes. [2025-03-14 01:00:51,959 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 21 of 37 statements. [2025-03-14 01:00:51,959 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-14 01:00:51,959 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:00:52,082 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-14 01:00:52,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:00:52,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832608412] [2025-03-14 01:00:52,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832608412] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:00:52,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:00:52,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-14 01:00:52,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801132826] [2025-03-14 01:00:52,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:00:52,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-14 01:00:52,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:00:52,084 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-14 01:00:52,085 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-14 01:00:52,085 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:00:52,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 264 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:00:52,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:00:52,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:00:52,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:00:52,279 INFO L124 PetriNetUnfolderBase]: 780/1157 cut-off events. [2025-03-14 01:00:52,280 INFO L125 PetriNetUnfolderBase]: For 1708/1708 co-relation queries the response was YES. [2025-03-14 01:00:52,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3726 conditions, 1157 events. 780/1157 cut-off events. For 1708/1708 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4271 event pairs, 306 based on Foata normal form. 48/1078 useless extension candidates. Maximal degree in co-relation 3625. Up to 792 conditions per place. [2025-03-14 01:00:52,284 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 67 selfloop transitions, 6 changer transitions 2/76 dead transitions. [2025-03-14 01:00:52,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 76 transitions, 523 flow [2025-03-14 01:00:52,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-14 01:00:52,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-14 01:00:52,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 66 transitions. [2025-03-14 01:00:52,285 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.532258064516129 [2025-03-14 01:00:52,285 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 264 flow. Second operand 4 states and 66 transitions. [2025-03-14 01:00:52,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 76 transitions, 523 flow [2025-03-14 01:00:52,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 76 transitions, 506 flow, removed 6 selfloop flow, removed 2 redundant places. [2025-03-14 01:00:52,287 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 281 flow [2025-03-14 01:00:52,288 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=281, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2025-03-14 01:00:52,288 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 24 predicate places. [2025-03-14 01:00:52,288 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 281 flow [2025-03-14 01:00:52,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:00:52,288 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:00:52,288 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:00:52,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-14 01:00:52,289 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:00:52,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:00:52,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1660430671, now seen corresponding path program 1 times [2025-03-14 01:00:52,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:00:52,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27780553] [2025-03-14 01:00:52,289 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:00:52,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:00:52,303 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-14 01:00:52,322 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-14 01:00:52,322 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:00:52,322 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:00:52,535 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-14 01:00:52,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:00:52,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27780553] [2025-03-14 01:00:52,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27780553] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:00:52,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:00:52,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-14 01:00:52,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23756214] [2025-03-14 01:00:52,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:00:52,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-14 01:00:52,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:00:52,536 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-14 01:00:52,536 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-14 01:00:52,536 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:00:52,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 281 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 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) [2025-03-14 01:00:52,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:00:52,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:00:52,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:00:52,797 INFO L124 PetriNetUnfolderBase]: 952/1406 cut-off events. [2025-03-14 01:00:52,797 INFO L125 PetriNetUnfolderBase]: For 2473/2473 co-relation queries the response was YES. [2025-03-14 01:00:52,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4581 conditions, 1406 events. 952/1406 cut-off events. For 2473/2473 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5481 event pairs, 267 based on Foata normal form. 24/1287 useless extension candidates. Maximal degree in co-relation 4480. Up to 728 conditions per place. [2025-03-14 01:00:52,805 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 82 selfloop transitions, 6 changer transitions 0/89 dead transitions. [2025-03-14 01:00:52,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 89 transitions, 635 flow [2025-03-14 01:00:52,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-14 01:00:52,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-14 01:00:52,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2025-03-14 01:00:52,806 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2025-03-14 01:00:52,806 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 281 flow. Second operand 5 states and 80 transitions. [2025-03-14 01:00:52,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 89 transitions, 635 flow [2025-03-14 01:00:52,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 89 transitions, 595 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-03-14 01:00:52,811 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 307 flow [2025-03-14 01:00:52,811 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=307, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2025-03-14 01:00:52,812 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 27 predicate places. [2025-03-14 01:00:52,812 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 307 flow [2025-03-14 01:00:52,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 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) [2025-03-14 01:00:52,812 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:00:52,812 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:00:52,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-14 01:00:52,813 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:00:52,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:00:52,813 INFO L85 PathProgramCache]: Analyzing trace with hash -31495155, now seen corresponding path program 2 times [2025-03-14 01:00:52,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:00:52,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581272690] [2025-03-14 01:00:52,813 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:00:52,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:00:52,829 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-03-14 01:00:52,850 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-03-14 01:00:52,850 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:00:52,850 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:00:53,016 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-14 01:00:53,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:00:53,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581272690] [2025-03-14 01:00:53,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581272690] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:00:53,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717717514] [2025-03-14 01:00:53,017 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:00:53,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:00:53,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:00:53,019 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) [2025-03-14 01:00:53,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-14 01:00:53,094 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-03-14 01:00:53,136 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-03-14 01:00:53,136 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:00:53,136 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:00:53,137 INFO L256 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-14 01:00:53,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:00:53,183 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-14 01:00:53,184 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:00:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-14 01:00:53,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717717514] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-14 01:00:53,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-14 01:00:53,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2025-03-14 01:00:53,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232495942] [2025-03-14 01:00:53,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:00:53,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-14 01:00:53,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:00:53,230 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-14 01:00:53,230 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-14 01:00:53,230 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:00:53,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 307 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 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) [2025-03-14 01:00:53,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:00:53,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:00:53,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:00:53,493 INFO L124 PetriNetUnfolderBase]: 1006/1482 cut-off events. [2025-03-14 01:00:53,493 INFO L125 PetriNetUnfolderBase]: For 2848/2848 co-relation queries the response was YES. [2025-03-14 01:00:53,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5106 conditions, 1482 events. 1006/1482 cut-off events. For 2848/2848 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5654 event pairs, 158 based on Foata normal form. 22/1357 useless extension candidates. Maximal degree in co-relation 5003. Up to 615 conditions per place. [2025-03-14 01:00:53,500 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 86 selfloop transitions, 8 changer transitions 4/99 dead transitions. [2025-03-14 01:00:53,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 99 transitions, 747 flow [2025-03-14 01:00:53,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-14 01:00:53,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-14 01:00:53,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2025-03-14 01:00:53,501 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49032258064516127 [2025-03-14 01:00:53,501 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 307 flow. Second operand 5 states and 76 transitions. [2025-03-14 01:00:53,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 99 transitions, 747 flow [2025-03-14 01:00:53,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 99 transitions, 735 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-14 01:00:53,507 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 361 flow [2025-03-14 01:00:53,508 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=361, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2025-03-14 01:00:53,509 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 32 predicate places. [2025-03-14 01:00:53,509 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 361 flow [2025-03-14 01:00:53,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 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) [2025-03-14 01:00:53,509 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:00:53,509 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:00:53,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-14 01:00:53,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:00:53,709 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:00:53,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:00:53,710 INFO L85 PathProgramCache]: Analyzing trace with hash -310279693, now seen corresponding path program 3 times [2025-03-14 01:00:53,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:00:53,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142294757] [2025-03-14 01:00:53,710 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:00:53,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:00:53,722 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 38 statements into 4 equivalence classes. [2025-03-14 01:00:53,752 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 29 of 38 statements. [2025-03-14 01:00:53,752 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:00:53,752 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:00:53,876 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-14 01:00:53,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:00:53,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142294757] [2025-03-14 01:00:53,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142294757] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:00:53,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:00:53,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-14 01:00:53,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274526863] [2025-03-14 01:00:53,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:00:53,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-14 01:00:53,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:00:53,876 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-14 01:00:53,876 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-14 01:00:53,877 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:00:53,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 361 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 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) [2025-03-14 01:00:53,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:00:53,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:00:53,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:00:54,125 INFO L124 PetriNetUnfolderBase]: 962/1411 cut-off events. [2025-03-14 01:00:54,125 INFO L125 PetriNetUnfolderBase]: For 3453/3453 co-relation queries the response was YES. [2025-03-14 01:00:54,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5072 conditions, 1411 events. 962/1411 cut-off events. For 3453/3453 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5330 event pairs, 285 based on Foata normal form. 22/1290 useless extension candidates. Maximal degree in co-relation 4966. Up to 750 conditions per place. [2025-03-14 01:00:54,132 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 77 selfloop transitions, 10 changer transitions 4/92 dead transitions. [2025-03-14 01:00:54,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 92 transitions, 697 flow [2025-03-14 01:00:54,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-14 01:00:54,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-14 01:00:54,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2025-03-14 01:00:54,133 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5225806451612903 [2025-03-14 01:00:54,133 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 361 flow. Second operand 5 states and 81 transitions. [2025-03-14 01:00:54,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 92 transitions, 697 flow [2025-03-14 01:00:54,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 92 transitions, 682 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-03-14 01:00:54,139 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 379 flow [2025-03-14 01:00:54,139 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=379, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2025-03-14 01:00:54,140 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 35 predicate places. [2025-03-14 01:00:54,140 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 379 flow [2025-03-14 01:00:54,140 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 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) [2025-03-14 01:00:54,140 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:00:54,141 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:00:54,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-14 01:00:54,141 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:00:54,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:00:54,141 INFO L85 PathProgramCache]: Analyzing trace with hash -301719829, now seen corresponding path program 4 times [2025-03-14 01:00:54,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:00:54,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632124213] [2025-03-14 01:00:54,142 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 01:00:54,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:00:54,155 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 38 statements into 2 equivalence classes. [2025-03-14 01:00:54,183 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-03-14 01:00:54,183 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 01:00:54,183 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:00:54,370 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-14 01:00:54,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:00:54,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632124213] [2025-03-14 01:00:54,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632124213] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:00:54,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:00:54,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-14 01:00:54,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034894651] [2025-03-14 01:00:54,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:00:54,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-14 01:00:54,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:00:54,371 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-14 01:00:54,371 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-14 01:00:54,372 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:00:54,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 379 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 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) [2025-03-14 01:00:54,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:00:54,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:00:54,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:00:54,627 INFO L124 PetriNetUnfolderBase]: 906/1330 cut-off events. [2025-03-14 01:00:54,627 INFO L125 PetriNetUnfolderBase]: For 3688/3688 co-relation queries the response was YES. [2025-03-14 01:00:54,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4916 conditions, 1330 events. 906/1330 cut-off events. For 3688/3688 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4883 event pairs, 290 based on Foata normal form. 12/1203 useless extension candidates. Maximal degree in co-relation 4809. Up to 900 conditions per place. [2025-03-14 01:00:54,634 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 71 selfloop transitions, 8 changer transitions 14/94 dead transitions. [2025-03-14 01:00:54,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 94 transitions, 753 flow [2025-03-14 01:00:54,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-14 01:00:54,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-14 01:00:54,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2025-03-14 01:00:54,634 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49032258064516127 [2025-03-14 01:00:54,634 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 379 flow. Second operand 5 states and 76 transitions. [2025-03-14 01:00:54,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 94 transitions, 753 flow [2025-03-14 01:00:54,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 94 transitions, 721 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-03-14 01:00:54,640 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 429 flow [2025-03-14 01:00:54,640 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=429, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2025-03-14 01:00:54,642 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 36 predicate places. [2025-03-14 01:00:54,642 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 429 flow [2025-03-14 01:00:54,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 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) [2025-03-14 01:00:54,643 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:00:54,643 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:00:54,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-14 01:00:54,643 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:00:54,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:00:54,643 INFO L85 PathProgramCache]: Analyzing trace with hash -662437981, now seen corresponding path program 5 times [2025-03-14 01:00:54,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:00:54,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550362179] [2025-03-14 01:00:54,644 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 01:00:54,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:00:54,655 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 38 statements into 4 equivalence classes. [2025-03-14 01:00:54,679 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 38 of 38 statements. [2025-03-14 01:00:54,679 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-14 01:00:54,679 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:00:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-14 01:00:54,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:00:54,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550362179] [2025-03-14 01:00:54,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550362179] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:00:54,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194140907] [2025-03-14 01:00:54,835 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 01:00:54,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:00:54,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:00:54,837 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) [2025-03-14 01:00:54,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-14 01:00:54,917 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 38 statements into 4 equivalence classes. [2025-03-14 01:00:55,143 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 38 of 38 statements. [2025-03-14 01:00:55,144 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-14 01:00:55,144 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:00:55,146 INFO L256 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-14 01:00:55,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:00:55,369 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-14 01:00:55,370 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:00:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-14 01:00:55,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194140907] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-14 01:00:55,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-14 01:00:55,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 8] total 15 [2025-03-14 01:00:55,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667089672] [2025-03-14 01:00:55,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:00:55,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-14 01:00:55,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:00:55,468 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-14 01:00:55,468 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2025-03-14 01:00:55,468 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:00:55,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 429 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:00:55,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:00:55,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:00:55,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:00:55,775 INFO L124 PetriNetUnfolderBase]: 1350/1958 cut-off events. [2025-03-14 01:00:55,775 INFO L125 PetriNetUnfolderBase]: For 4542/4542 co-relation queries the response was YES. [2025-03-14 01:00:55,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7123 conditions, 1958 events. 1350/1958 cut-off events. For 4542/4542 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8006 event pairs, 154 based on Foata normal form. 1/1736 useless extension candidates. Maximal degree in co-relation 7015. Up to 1137 conditions per place. [2025-03-14 01:00:55,784 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 101 selfloop transitions, 26 changer transitions 4/132 dead transitions. [2025-03-14 01:00:55,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 132 transitions, 1128 flow [2025-03-14 01:00:55,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-14 01:00:55,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-14 01:00:55,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 94 transitions. [2025-03-14 01:00:55,785 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5053763440860215 [2025-03-14 01:00:55,785 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 429 flow. Second operand 6 states and 94 transitions. [2025-03-14 01:00:55,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 132 transitions, 1128 flow [2025-03-14 01:00:55,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 132 transitions, 1080 flow, removed 11 selfloop flow, removed 2 redundant places. [2025-03-14 01:00:55,792 INFO L231 Difference]: Finished difference. Result has 74 places, 84 transitions, 719 flow [2025-03-14 01:00:55,792 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=719, PETRI_PLACES=74, PETRI_TRANSITIONS=84} [2025-03-14 01:00:55,793 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 43 predicate places. [2025-03-14 01:00:55,793 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 84 transitions, 719 flow [2025-03-14 01:00:55,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:00:55,793 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:00:55,793 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:00:55,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-14 01:00:55,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:00:55,994 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:00:55,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:00:55,994 INFO L85 PathProgramCache]: Analyzing trace with hash -804752757, now seen corresponding path program 6 times [2025-03-14 01:00:55,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:00:55,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347508090] [2025-03-14 01:00:55,994 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-14 01:00:55,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:00:56,005 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 38 statements into 4 equivalence classes. [2025-03-14 01:00:56,034 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 32 of 38 statements. [2025-03-14 01:00:56,034 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-14 01:00:56,034 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:00:56,195 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-14 01:00:56,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:00:56,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347508090] [2025-03-14 01:00:56,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347508090] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:00:56,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838265674] [2025-03-14 01:00:56,195 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-14 01:00:56,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:00:56,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:00:56,197 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) [2025-03-14 01:00:56,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-14 01:00:56,293 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 38 statements into 4 equivalence classes. [2025-03-14 01:00:56,330 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 32 of 38 statements. [2025-03-14 01:00:56,331 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-14 01:00:56,331 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:00:56,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-14 01:00:56,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:00:56,399 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-14 01:00:56,399 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:00:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-14 01:00:56,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838265674] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-14 01:00:56,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-14 01:00:56,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2025-03-14 01:00:56,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763419467] [2025-03-14 01:00:56,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:00:56,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-14 01:00:56,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:00:56,465 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-14 01:00:56,465 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-03-14 01:00:56,465 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:00:56,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 84 transitions, 719 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 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) [2025-03-14 01:00:56,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:00:56,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:00:56,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:00:56,740 INFO L124 PetriNetUnfolderBase]: 1312/1898 cut-off events. [2025-03-14 01:00:56,741 INFO L125 PetriNetUnfolderBase]: For 7595/7595 co-relation queries the response was YES. [2025-03-14 01:00:56,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7843 conditions, 1898 events. 1312/1898 cut-off events. For 7595/7595 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7451 event pairs, 202 based on Foata normal form. 36/1833 useless extension candidates. Maximal degree in co-relation 7729. Up to 1186 conditions per place. [2025-03-14 01:00:56,756 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 85 selfloop transitions, 26 changer transitions 1/113 dead transitions. [2025-03-14 01:00:56,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 113 transitions, 1103 flow [2025-03-14 01:00:56,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-14 01:00:56,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-14 01:00:56,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 72 transitions. [2025-03-14 01:00:56,758 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4645161290322581 [2025-03-14 01:00:56,758 INFO L175 Difference]: Start difference. First operand has 74 places, 84 transitions, 719 flow. Second operand 5 states and 72 transitions. [2025-03-14 01:00:56,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 113 transitions, 1103 flow [2025-03-14 01:00:56,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 113 transitions, 1085 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-03-14 01:00:56,771 INFO L231 Difference]: Finished difference. Result has 78 places, 83 transitions, 773 flow [2025-03-14 01:00:56,771 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=773, PETRI_PLACES=78, PETRI_TRANSITIONS=83} [2025-03-14 01:00:56,771 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 47 predicate places. [2025-03-14 01:00:56,771 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 83 transitions, 773 flow [2025-03-14 01:00:56,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 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) [2025-03-14 01:00:56,772 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:00:56,772 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:00:56,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-14 01:00:56,972 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,SelfDestructingSolverStorable13 [2025-03-14 01:00:56,972 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:00:56,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:00:56,973 INFO L85 PathProgramCache]: Analyzing trace with hash -59669837, now seen corresponding path program 1 times [2025-03-14 01:00:56,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:00:56,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865527193] [2025-03-14 01:00:56,973 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:00:56,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:00:56,985 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-14 01:00:57,020 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-14 01:00:57,020 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:00:57,020 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:00:57,735 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-14 01:00:57,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:00:57,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865527193] [2025-03-14 01:00:57,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865527193] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:00:57,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101621103] [2025-03-14 01:00:57,735 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:00:57,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:00:57,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:00:57,737 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) [2025-03-14 01:00:57,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-14 01:00:57,822 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-14 01:00:57,860 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-14 01:00:57,861 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:00:57,861 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:00:57,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-14 01:00:57,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:00:58,078 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-14 01:00:58,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2025-03-14 01:00:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-14 01:00:58,105 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:00:58,435 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2025-03-14 01:00:58,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2025-03-14 01:00:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-14 01:00:58,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101621103] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:00:58,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:00:58,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 28 [2025-03-14 01:00:58,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267114661] [2025-03-14 01:00:58,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:00:58,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-14 01:00:58,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:00:58,586 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-14 01:00:58,586 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2025-03-14 01:00:58,586 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:00:58,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 83 transitions, 773 flow. Second operand has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 28 states have internal predecessors, (176), 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) [2025-03-14 01:00:58,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:00:58,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:00:58,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:00:59,987 INFO L124 PetriNetUnfolderBase]: 2610/3771 cut-off events. [2025-03-14 01:00:59,987 INFO L125 PetriNetUnfolderBase]: For 14321/14321 co-relation queries the response was YES. [2025-03-14 01:00:59,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15607 conditions, 3771 events. 2610/3771 cut-off events. For 14321/14321 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 17480 event pairs, 296 based on Foata normal form. 1/3521 useless extension candidates. Maximal degree in co-relation 15491. Up to 1293 conditions per place. [2025-03-14 01:01:00,003 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 167 selfloop transitions, 84 changer transitions 9/261 dead transitions. [2025-03-14 01:01:00,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 261 transitions, 2594 flow [2025-03-14 01:01:00,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-14 01:01:00,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-14 01:01:00,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 216 transitions. [2025-03-14 01:01:00,005 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4098671726755218 [2025-03-14 01:01:00,005 INFO L175 Difference]: Start difference. First operand has 78 places, 83 transitions, 773 flow. Second operand 17 states and 216 transitions. [2025-03-14 01:01:00,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 261 transitions, 2594 flow [2025-03-14 01:01:00,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 261 transitions, 2478 flow, removed 13 selfloop flow, removed 4 redundant places. [2025-03-14 01:01:00,030 INFO L231 Difference]: Finished difference. Result has 97 places, 154 transitions, 1716 flow [2025-03-14 01:01:00,031 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1716, PETRI_PLACES=97, PETRI_TRANSITIONS=154} [2025-03-14 01:01:00,031 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 66 predicate places. [2025-03-14 01:01:00,031 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 154 transitions, 1716 flow [2025-03-14 01:01:00,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 28 states have internal predecessors, (176), 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) [2025-03-14 01:01:00,031 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:01:00,031 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:01:00,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-14 01:01:00,232 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,SelfDestructingSolverStorable14 [2025-03-14 01:01:00,232 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:01:00,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:01:00,233 INFO L85 PathProgramCache]: Analyzing trace with hash -426979597, now seen corresponding path program 2 times [2025-03-14 01:01:00,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:01:00,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202274931] [2025-03-14 01:01:00,233 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:01:00,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:01:00,243 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 39 statements into 2 equivalence classes. [2025-03-14 01:01:00,285 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-14 01:01:00,285 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:01:00,285 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:01:00,917 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-14 01:01:00,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:01:00,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202274931] [2025-03-14 01:01:00,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202274931] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:01:00,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752980110] [2025-03-14 01:01:00,917 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:01:00,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:01:00,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:01:00,920 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) [2025-03-14 01:01:00,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-14 01:01:01,010 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 39 statements into 2 equivalence classes. [2025-03-14 01:01:01,047 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-14 01:01:01,048 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:01:01,048 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:01:01,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-14 01:01:01,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:01:01,288 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-14 01:01:01,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 75 [2025-03-14 01:01:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-14 01:01:01,339 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:01:01,639 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2025-03-14 01:01:01,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2025-03-14 01:01:01,774 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-14 01:01:01,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752980110] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:01:01,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:01:01,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 25 [2025-03-14 01:01:01,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143414832] [2025-03-14 01:01:01,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:01:01,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-14 01:01:01,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:01:01,775 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-14 01:01:01,776 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2025-03-14 01:01:01,776 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:01:01,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 154 transitions, 1716 flow. Second operand has 25 states, 25 states have (on average 6.36) internal successors, (159), 25 states have internal predecessors, (159), 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) [2025-03-14 01:01:01,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:01:01,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:01:01,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:01:03,208 INFO L124 PetriNetUnfolderBase]: 2894/4181 cut-off events. [2025-03-14 01:01:03,208 INFO L125 PetriNetUnfolderBase]: For 23183/23183 co-relation queries the response was YES. [2025-03-14 01:01:03,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19788 conditions, 4181 events. 2894/4181 cut-off events. For 23183/23183 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 19940 event pairs, 249 based on Foata normal form. 1/4182 useless extension candidates. Maximal degree in co-relation 19664. Up to 1345 conditions per place. [2025-03-14 01:01:03,227 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 202 selfloop transitions, 143 changer transitions 52/398 dead transitions. [2025-03-14 01:01:03,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 398 transitions, 4417 flow [2025-03-14 01:01:03,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-14 01:01:03,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-03-14 01:01:03,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 340 transitions. [2025-03-14 01:01:03,229 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3781979977753059 [2025-03-14 01:01:03,229 INFO L175 Difference]: Start difference. First operand has 97 places, 154 transitions, 1716 flow. Second operand 29 states and 340 transitions. [2025-03-14 01:01:03,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 398 transitions, 4417 flow [2025-03-14 01:01:03,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 398 transitions, 4328 flow, removed 43 selfloop flow, removed 2 redundant places. [2025-03-14 01:01:03,285 INFO L231 Difference]: Finished difference. Result has 136 places, 220 transitions, 2831 flow [2025-03-14 01:01:03,285 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1663, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2831, PETRI_PLACES=136, PETRI_TRANSITIONS=220} [2025-03-14 01:01:03,285 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 105 predicate places. [2025-03-14 01:01:03,285 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 220 transitions, 2831 flow [2025-03-14 01:01:03,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 25 states have internal predecessors, (159), 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) [2025-03-14 01:01:03,285 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:01:03,286 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:01:03,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-14 01:01:03,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:01:03,486 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:01:03,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:01:03,487 INFO L85 PathProgramCache]: Analyzing trace with hash -73971909, now seen corresponding path program 3 times [2025-03-14 01:01:03,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:01:03,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001535716] [2025-03-14 01:01:03,487 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:01:03,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:01:03,496 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 4 equivalence classes. [2025-03-14 01:01:03,532 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 30 of 39 statements. [2025-03-14 01:01:03,532 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:01:03,532 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:01:03,998 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-14 01:01:03,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:01:03,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001535716] [2025-03-14 01:01:03,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001535716] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:01:03,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910177578] [2025-03-14 01:01:03,998 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:01:03,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:01:03,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:01:04,000 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) [2025-03-14 01:01:04,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-14 01:01:04,090 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 4 equivalence classes. [2025-03-14 01:01:04,124 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 30 of 39 statements. [2025-03-14 01:01:04,124 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:01:04,124 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:01:04,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-14 01:01:04,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:01:04,262 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-14 01:01:04,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2025-03-14 01:01:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-14 01:01:04,322 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:01:04,593 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2025-03-14 01:01:04,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2025-03-14 01:01:04,714 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-14 01:01:04,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910177578] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:01:04,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:01:04,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 26 [2025-03-14 01:01:04,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816050676] [2025-03-14 01:01:04,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:01:04,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-14 01:01:04,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:01:04,715 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-14 01:01:04,716 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2025-03-14 01:01:04,716 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:01:04,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 220 transitions, 2831 flow. Second operand has 26 states, 26 states have (on average 6.346153846153846) internal successors, (165), 26 states have internal predecessors, (165), 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) [2025-03-14 01:01:04,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:01:04,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:01:04,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:01:06,139 INFO L124 PetriNetUnfolderBase]: 2703/3923 cut-off events. [2025-03-14 01:01:06,139 INFO L125 PetriNetUnfolderBase]: For 54526/54526 co-relation queries the response was YES. [2025-03-14 01:01:06,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26285 conditions, 3923 events. 2703/3923 cut-off events. For 54526/54526 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 18512 event pairs, 306 based on Foata normal form. 3/3926 useless extension candidates. Maximal degree in co-relation 26148. Up to 1330 conditions per place. [2025-03-14 01:01:06,159 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 212 selfloop transitions, 140 changer transitions 7/360 dead transitions. [2025-03-14 01:01:06,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 360 transitions, 4826 flow [2025-03-14 01:01:06,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-14 01:01:06,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-03-14 01:01:06,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 266 transitions. [2025-03-14 01:01:06,161 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37307152875175315 [2025-03-14 01:01:06,161 INFO L175 Difference]: Start difference. First operand has 136 places, 220 transitions, 2831 flow. Second operand 23 states and 266 transitions. [2025-03-14 01:01:06,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 360 transitions, 4826 flow [2025-03-14 01:01:06,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 360 transitions, 4539 flow, removed 102 selfloop flow, removed 8 redundant places. [2025-03-14 01:01:06,287 INFO L231 Difference]: Finished difference. Result has 152 places, 234 transitions, 3081 flow [2025-03-14 01:01:06,287 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2570, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3081, PETRI_PLACES=152, PETRI_TRANSITIONS=234} [2025-03-14 01:01:06,288 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 121 predicate places. [2025-03-14 01:01:06,288 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 234 transitions, 3081 flow [2025-03-14 01:01:06,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.346153846153846) internal successors, (165), 26 states have internal predecessors, (165), 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) [2025-03-14 01:01:06,288 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:01:06,288 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:01:06,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-14 01:01:06,488 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,SelfDestructingSolverStorable16 [2025-03-14 01:01:06,489 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:01:06,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:01:06,489 INFO L85 PathProgramCache]: Analyzing trace with hash 463883669, now seen corresponding path program 4 times [2025-03-14 01:01:06,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:01:06,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828080269] [2025-03-14 01:01:06,489 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 01:01:06,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:01:06,499 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 39 statements into 2 equivalence classes. [2025-03-14 01:01:06,526 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-14 01:01:06,527 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 01:01:06,527 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:01:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2025-03-14 01:01:07,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:01:07,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828080269] [2025-03-14 01:01:07,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828080269] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:01:07,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903730948] [2025-03-14 01:01:07,817 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 01:01:07,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:01:07,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:01:07,819 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) [2025-03-14 01:01:07,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-14 01:01:07,911 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 39 statements into 2 equivalence classes. [2025-03-14 01:01:07,946 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-14 01:01:07,946 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 01:01:07,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:01:07,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-14 01:01:07,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:01:08,088 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-14 01:01:08,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2025-03-14 01:01:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-14 01:01:08,158 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:01:12,457 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2025-03-14 01:01:12,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2025-03-14 01:01:12,561 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-14 01:01:12,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903730948] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:01:12,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:01:12,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11, 9] total 34 [2025-03-14 01:01:12,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506812651] [2025-03-14 01:01:12,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:01:12,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-03-14 01:01:12,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:01:12,563 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-03-14 01:01:12,563 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=992, Unknown=1, NotChecked=0, Total=1122 [2025-03-14 01:01:12,563 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:01:12,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 234 transitions, 3081 flow. Second operand has 34 states, 34 states have (on average 5.882352941176471) internal successors, (200), 34 states have internal predecessors, (200), 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) [2025-03-14 01:01:12,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:01:12,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:01:12,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:01:17,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-14 01:01:21,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-14 01:01:25,342 INFO L124 PetriNetUnfolderBase]: 2713/3945 cut-off events. [2025-03-14 01:01:25,342 INFO L125 PetriNetUnfolderBase]: For 72239/72239 co-relation queries the response was YES. [2025-03-14 01:01:25,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28632 conditions, 3945 events. 2713/3945 cut-off events. For 72239/72239 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 18615 event pairs, 434 based on Foata normal form. 1/3935 useless extension candidates. Maximal degree in co-relation 28489. Up to 1477 conditions per place. [2025-03-14 01:01:25,371 INFO L140 encePairwiseOnDemand]: 15/31 looper letters, 166 selfloop transitions, 157 changer transitions 3/327 dead transitions. [2025-03-14 01:01:25,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 327 transitions, 4531 flow [2025-03-14 01:01:25,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-14 01:01:25,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-03-14 01:01:25,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 263 transitions. [2025-03-14 01:01:25,375 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3393548387096774 [2025-03-14 01:01:25,375 INFO L175 Difference]: Start difference. First operand has 152 places, 234 transitions, 3081 flow. Second operand 25 states and 263 transitions. [2025-03-14 01:01:25,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 327 transitions, 4531 flow [2025-03-14 01:01:25,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 327 transitions, 4283 flow, removed 48 selfloop flow, removed 13 redundant places. [2025-03-14 01:01:25,525 INFO L231 Difference]: Finished difference. Result has 164 places, 237 transitions, 3197 flow [2025-03-14 01:01:25,525 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2836, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3197, PETRI_PLACES=164, PETRI_TRANSITIONS=237} [2025-03-14 01:01:25,525 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 133 predicate places. [2025-03-14 01:01:25,525 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 237 transitions, 3197 flow [2025-03-14 01:01:25,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.882352941176471) internal successors, (200), 34 states have internal predecessors, (200), 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) [2025-03-14 01:01:25,526 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:01:25,526 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:01:25,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-14 01:01:25,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-14 01:01:25,726 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:01:25,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:01:25,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1867294537, now seen corresponding path program 5 times [2025-03-14 01:01:25,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:01:25,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365371331] [2025-03-14 01:01:25,727 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 01:01:25,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:01:25,740 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 39 statements into 4 equivalence classes. [2025-03-14 01:01:25,778 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 39 of 39 statements. [2025-03-14 01:01:25,779 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-14 01:01:25,779 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:01:26,769 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2025-03-14 01:01:26,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:01:26,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365371331] [2025-03-14 01:01:26,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365371331] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:01:26,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709428807] [2025-03-14 01:01:26,769 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 01:01:26,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:01:26,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:01:26,772 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) [2025-03-14 01:01:26,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-14 01:01:26,861 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 39 statements into 4 equivalence classes. [2025-03-14 01:01:27,202 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 39 of 39 statements. [2025-03-14 01:01:27,202 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-14 01:01:27,202 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:01:27,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-14 01:01:27,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:01:27,462 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-14 01:01:27,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2025-03-14 01:01:27,498 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-14 01:01:27,498 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:01:27,854 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2025-03-14 01:01:27,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2025-03-14 01:01:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-14 01:01:27,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709428807] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:01:27,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:01:27,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 9] total 28 [2025-03-14 01:01:27,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3912654] [2025-03-14 01:01:27,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:01:27,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-14 01:01:27,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:01:27,997 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-14 01:01:27,998 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2025-03-14 01:01:27,998 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:01:27,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 237 transitions, 3197 flow. Second operand has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 28 states have internal predecessors, (180), 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) [2025-03-14 01:01:27,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:01:27,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:01:27,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:01:30,025 INFO L124 PetriNetUnfolderBase]: 3023/4387 cut-off events. [2025-03-14 01:01:30,025 INFO L125 PetriNetUnfolderBase]: For 81312/81312 co-relation queries the response was YES. [2025-03-14 01:01:30,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32320 conditions, 4387 events. 3023/4387 cut-off events. For 81312/81312 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 20956 event pairs, 372 based on Foata normal form. 1/4388 useless extension candidates. Maximal degree in co-relation 32160. Up to 1380 conditions per place. [2025-03-14 01:01:30,055 INFO L140 encePairwiseOnDemand]: 16/31 looper letters, 233 selfloop transitions, 160 changer transitions 19/413 dead transitions. [2025-03-14 01:01:30,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 413 transitions, 5931 flow [2025-03-14 01:01:30,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-14 01:01:30,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-14 01:01:30,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 291 transitions. [2025-03-14 01:01:30,056 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3911290322580645 [2025-03-14 01:01:30,056 INFO L175 Difference]: Start difference. First operand has 164 places, 237 transitions, 3197 flow. Second operand 24 states and 291 transitions. [2025-03-14 01:01:30,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 413 transitions, 5931 flow [2025-03-14 01:01:30,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 413 transitions, 5644 flow, removed 4 selfloop flow, removed 25 redundant places. [2025-03-14 01:01:30,231 INFO L231 Difference]: Finished difference. Result has 171 places, 281 transitions, 4131 flow [2025-03-14 01:01:30,231 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2938, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4131, PETRI_PLACES=171, PETRI_TRANSITIONS=281} [2025-03-14 01:01:30,231 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 140 predicate places. [2025-03-14 01:01:30,231 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 281 transitions, 4131 flow [2025-03-14 01:01:30,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 28 states have internal predecessors, (180), 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) [2025-03-14 01:01:30,232 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:01:30,232 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:01:30,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-14 01:01:30,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:01:30,432 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:01:30,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:01:30,433 INFO L85 PathProgramCache]: Analyzing trace with hash 110875981, now seen corresponding path program 6 times [2025-03-14 01:01:30,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:01:30,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718959856] [2025-03-14 01:01:30,433 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-14 01:01:30,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:01:30,444 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 39 statements into 4 equivalence classes. [2025-03-14 01:01:30,480 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 33 of 39 statements. [2025-03-14 01:01:30,480 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-14 01:01:30,480 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:01:31,143 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-14 01:01:31,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:01:31,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718959856] [2025-03-14 01:01:31,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718959856] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:01:31,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404636433] [2025-03-14 01:01:31,144 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-14 01:01:31,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:01:31,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:01:31,147 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) [2025-03-14 01:01:31,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-14 01:01:31,238 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 39 statements into 4 equivalence classes. [2025-03-14 01:01:31,272 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 33 of 39 statements. [2025-03-14 01:01:31,272 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-14 01:01:31,272 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:01:31,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-14 01:01:31,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:01:31,528 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-14 01:01:31,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 75 [2025-03-14 01:01:31,598 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-14 01:01:31,598 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:01:32,014 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2025-03-14 01:01:32,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2025-03-14 01:01:32,174 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-14 01:01:32,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404636433] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:01:32,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:01:32,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 9] total 25 [2025-03-14 01:01:32,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71162376] [2025-03-14 01:01:32,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:01:32,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-14 01:01:32,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:01:32,175 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-14 01:01:32,175 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2025-03-14 01:01:32,175 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:01:32,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 281 transitions, 4131 flow. Second operand has 25 states, 25 states have (on average 6.36) internal successors, (159), 25 states have internal predecessors, (159), 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) [2025-03-14 01:01:32,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:01:32,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:01:32,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:01:33,941 INFO L124 PetriNetUnfolderBase]: 3032/4410 cut-off events. [2025-03-14 01:01:33,941 INFO L125 PetriNetUnfolderBase]: For 117225/117225 co-relation queries the response was YES. [2025-03-14 01:01:33,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35907 conditions, 4410 events. 3032/4410 cut-off events. For 117225/117225 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 21374 event pairs, 334 based on Foata normal form. 1/4411 useless extension candidates. Maximal degree in co-relation 35763. Up to 1372 conditions per place. [2025-03-14 01:01:33,968 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 265 selfloop transitions, 149 changer transitions 9/424 dead transitions. [2025-03-14 01:01:33,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 424 transitions, 6584 flow [2025-03-14 01:01:33,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-14 01:01:33,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-03-14 01:01:33,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 287 transitions. [2025-03-14 01:01:33,969 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37032258064516127 [2025-03-14 01:01:33,969 INFO L175 Difference]: Start difference. First operand has 171 places, 281 transitions, 4131 flow. Second operand 25 states and 287 transitions. [2025-03-14 01:01:33,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 424 transitions, 6584 flow [2025-03-14 01:01:34,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 424 transitions, 6239 flow, removed 111 selfloop flow, removed 13 redundant places. [2025-03-14 01:01:34,188 INFO L231 Difference]: Finished difference. Result has 186 places, 300 transitions, 4540 flow [2025-03-14 01:01:34,188 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3852, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4540, PETRI_PLACES=186, PETRI_TRANSITIONS=300} [2025-03-14 01:01:34,189 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 155 predicate places. [2025-03-14 01:01:34,189 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 300 transitions, 4540 flow [2025-03-14 01:01:34,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 25 states have internal predecessors, (159), 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) [2025-03-14 01:01:34,189 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:01:34,189 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:01:34,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-14 01:01:34,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:01:34,390 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:01:34,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:01:34,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1409163029, now seen corresponding path program 7 times [2025-03-14 01:01:34,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:01:34,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170555332] [2025-03-14 01:01:34,390 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-14 01:01:34,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:01:34,400 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-14 01:01:34,416 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-14 01:01:34,417 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:01:34,417 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:01:35,311 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-14 01:01:35,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:01:35,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170555332] [2025-03-14 01:01:35,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170555332] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:01:35,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020675048] [2025-03-14 01:01:35,312 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-14 01:01:35,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:01:35,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:01:35,315 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) [2025-03-14 01:01:35,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-14 01:01:35,432 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-14 01:01:35,475 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-14 01:01:35,475 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:01:35,475 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:01:35,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-14 01:01:35,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:01:35,696 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-14 01:01:35,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2025-03-14 01:01:35,734 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-14 01:01:35,734 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:01:36,133 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2025-03-14 01:01:36,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2025-03-14 01:01:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-14 01:01:36,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020675048] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:01:36,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:01:36,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 26 [2025-03-14 01:01:36,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875567867] [2025-03-14 01:01:36,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:01:36,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-14 01:01:36,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:01:36,287 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-14 01:01:36,291 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2025-03-14 01:01:36,292 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:01:36,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 300 transitions, 4540 flow. Second operand has 26 states, 26 states have (on average 6.1923076923076925) internal successors, (161), 26 states have internal predecessors, (161), 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) [2025-03-14 01:01:36,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:01:36,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:01:36,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:01:40,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-14 01:01:42,246 INFO L124 PetriNetUnfolderBase]: 3046/4436 cut-off events. [2025-03-14 01:01:42,246 INFO L125 PetriNetUnfolderBase]: For 127672/127672 co-relation queries the response was YES. [2025-03-14 01:01:42,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37207 conditions, 4436 events. 3046/4436 cut-off events. For 127672/127672 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 21465 event pairs, 475 based on Foata normal form. 1/4437 useless extension candidates. Maximal degree in co-relation 37068. Up to 2006 conditions per place. [2025-03-14 01:01:42,273 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 252 selfloop transitions, 124 changer transitions 7/384 dead transitions. [2025-03-14 01:01:42,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 384 transitions, 6187 flow [2025-03-14 01:01:42,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-14 01:01:42,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-14 01:01:42,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 194 transitions. [2025-03-14 01:01:42,275 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3911290322580645 [2025-03-14 01:01:42,275 INFO L175 Difference]: Start difference. First operand has 186 places, 300 transitions, 4540 flow. Second operand 16 states and 194 transitions. [2025-03-14 01:01:42,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 384 transitions, 6187 flow [2025-03-14 01:01:42,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 384 transitions, 5846 flow, removed 78 selfloop flow, removed 15 redundant places. [2025-03-14 01:01:42,525 INFO L231 Difference]: Finished difference. Result has 187 places, 305 transitions, 4579 flow [2025-03-14 01:01:42,525 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4208, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4579, PETRI_PLACES=187, PETRI_TRANSITIONS=305} [2025-03-14 01:01:42,526 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 156 predicate places. [2025-03-14 01:01:42,526 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 305 transitions, 4579 flow [2025-03-14 01:01:42,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.1923076923076925) internal successors, (161), 26 states have internal predecessors, (161), 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) [2025-03-14 01:01:42,526 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:01:42,526 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:01:42,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-14 01:01:42,726 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,SelfDestructingSolverStorable20 [2025-03-14 01:01:42,727 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:01:42,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:01:42,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1947018607, now seen corresponding path program 8 times [2025-03-14 01:01:42,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:01:42,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039508220] [2025-03-14 01:01:42,728 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:01:42,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:01:42,739 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 39 statements into 2 equivalence classes. [2025-03-14 01:01:42,756 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-14 01:01:42,756 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:01:42,756 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:01:43,576 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-14 01:01:43,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:01:43,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039508220] [2025-03-14 01:01:43,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039508220] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:01:43,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727500643] [2025-03-14 01:01:43,577 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:01:43,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:01:43,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:01:43,579 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) [2025-03-14 01:01:43,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-14 01:01:43,686 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 39 statements into 2 equivalence classes. [2025-03-14 01:01:43,722 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-14 01:01:43,722 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:01:43,723 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:01:43,728 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-14 01:01:43,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:01:43,867 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-14 01:01:43,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2025-03-14 01:01:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-14 01:01:43,963 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:01:44,373 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2025-03-14 01:01:44,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2025-03-14 01:01:44,544 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-14 01:01:44,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727500643] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:01:44,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:01:44,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 29 [2025-03-14 01:01:44,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574756954] [2025-03-14 01:01:44,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:01:44,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-14 01:01:44,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:01:44,545 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-14 01:01:44,545 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2025-03-14 01:01:44,545 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:01:44,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 305 transitions, 4579 flow. Second operand has 29 states, 29 states have (on average 6.206896551724138) internal successors, (180), 29 states have internal predecessors, (180), 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) [2025-03-14 01:01:44,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:01:44,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:01:44,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:01:47,225 INFO L124 PetriNetUnfolderBase]: 3077/4502 cut-off events. [2025-03-14 01:01:47,225 INFO L125 PetriNetUnfolderBase]: For 125056/125056 co-relation queries the response was YES. [2025-03-14 01:01:47,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37067 conditions, 4502 events. 3077/4502 cut-off events. For 125056/125056 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 22111 event pairs, 331 based on Foata normal form. 3/4505 useless extension candidates. Maximal degree in co-relation 36927. Up to 1376 conditions per place. [2025-03-14 01:01:47,254 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 277 selfloop transitions, 157 changer transitions 12/447 dead transitions. [2025-03-14 01:01:47,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 447 transitions, 6834 flow [2025-03-14 01:01:47,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-14 01:01:47,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-03-14 01:01:47,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 317 transitions. [2025-03-14 01:01:47,258 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3652073732718894 [2025-03-14 01:01:47,258 INFO L175 Difference]: Start difference. First operand has 187 places, 305 transitions, 4579 flow. Second operand 28 states and 317 transitions. [2025-03-14 01:01:47,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 447 transitions, 6834 flow [2025-03-14 01:01:47,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 447 transitions, 6597 flow, removed 21 selfloop flow, removed 13 redundant places. [2025-03-14 01:01:47,443 INFO L231 Difference]: Finished difference. Result has 205 places, 314 transitions, 4809 flow [2025-03-14 01:01:47,443 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4342, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=4809, PETRI_PLACES=205, PETRI_TRANSITIONS=314} [2025-03-14 01:01:47,443 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 174 predicate places. [2025-03-14 01:01:47,444 INFO L471 AbstractCegarLoop]: Abstraction has has 205 places, 314 transitions, 4809 flow [2025-03-14 01:01:47,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.206896551724138) internal successors, (180), 29 states have internal predecessors, (180), 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) [2025-03-14 01:01:47,444 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:01:47,444 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:01:47,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-14 01:01:47,644 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,SelfDestructingSolverStorable21 [2025-03-14 01:01:47,645 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:01:47,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:01:47,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1940862887, now seen corresponding path program 9 times [2025-03-14 01:01:47,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:01:47,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001212983] [2025-03-14 01:01:47,645 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:01:47,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:01:47,655 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 5 equivalence classes. [2025-03-14 01:01:47,669 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 39 statements. [2025-03-14 01:01:47,670 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:01:47,670 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:01:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-14 01:01:48,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:01:48,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001212983] [2025-03-14 01:01:48,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001212983] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:01:48,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062152717] [2025-03-14 01:01:48,168 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:01:48,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:01:48,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:01:48,170 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) [2025-03-14 01:01:48,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-14 01:01:48,272 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 5 equivalence classes. [2025-03-14 01:01:48,293 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 39 statements. [2025-03-14 01:01:48,293 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:01:48,293 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:01:48,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-14 01:01:48,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:01:48,436 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-14 01:01:48,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2025-03-14 01:01:48,518 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-14 01:01:48,518 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:01:48,935 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2025-03-14 01:01:48,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 210 [2025-03-14 01:01:57,753 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-14 01:01:57,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062152717] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:01:57,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:01:57,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 29 [2025-03-14 01:01:57,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46306114] [2025-03-14 01:01:57,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:01:57,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-14 01:01:57,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:01:57,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-14 01:01:57,754 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2025-03-14 01:01:57,754 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:01:57,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 314 transitions, 4809 flow. Second operand has 29 states, 29 states have (on average 6.206896551724138) internal successors, (180), 29 states have internal predecessors, (180), 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) [2025-03-14 01:01:57,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:01:57,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:01:57,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:01:59,814 INFO L124 PetriNetUnfolderBase]: 3519/5156 cut-off events. [2025-03-14 01:01:59,814 INFO L125 PetriNetUnfolderBase]: For 147699/147699 co-relation queries the response was YES. [2025-03-14 01:01:59,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43646 conditions, 5156 events. 3519/5156 cut-off events. For 147699/147699 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 26036 event pairs, 632 based on Foata normal form. 3/5159 useless extension candidates. Maximal degree in co-relation 43502. Up to 3883 conditions per place. [2025-03-14 01:01:59,852 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 315 selfloop transitions, 148 changer transitions 5/469 dead transitions. [2025-03-14 01:01:59,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 469 transitions, 7769 flow [2025-03-14 01:01:59,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-14 01:01:59,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-03-14 01:01:59,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 275 transitions. [2025-03-14 01:01:59,853 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2025-03-14 01:01:59,854 INFO L175 Difference]: Start difference. First operand has 205 places, 314 transitions, 4809 flow. Second operand 25 states and 275 transitions. [2025-03-14 01:01:59,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 469 transitions, 7769 flow [2025-03-14 01:02:00,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 469 transitions, 7458 flow, removed 26 selfloop flow, removed 21 redundant places. [2025-03-14 01:02:00,187 INFO L231 Difference]: Finished difference. Result has 216 places, 375 transitions, 5921 flow [2025-03-14 01:02:00,187 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4545, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5921, PETRI_PLACES=216, PETRI_TRANSITIONS=375} [2025-03-14 01:02:00,188 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 185 predicate places. [2025-03-14 01:02:00,188 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 375 transitions, 5921 flow [2025-03-14 01:02:00,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.206896551724138) internal successors, (180), 29 states have internal predecessors, (180), 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) [2025-03-14 01:02:00,188 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:02:00,188 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:02:00,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-14 01:02:00,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:02:00,389 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:02:00,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:02:00,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1660024277, now seen corresponding path program 10 times [2025-03-14 01:02:00,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:02:00,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309407288] [2025-03-14 01:02:00,390 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 01:02:00,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:02:00,401 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 39 statements into 2 equivalence classes. [2025-03-14 01:02:00,419 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-14 01:02:00,420 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 01:02:00,420 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:02:02,025 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-14 01:02:02,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:02:02,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309407288] [2025-03-14 01:02:02,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309407288] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:02:02,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458641940] [2025-03-14 01:02:02,030 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 01:02:02,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:02:02,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:02:02,032 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) [2025-03-14 01:02:02,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-14 01:02:02,138 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 39 statements into 2 equivalence classes. [2025-03-14 01:02:02,172 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 39 of 39 statements. [2025-03-14 01:02:02,173 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-14 01:02:02,173 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:02:02,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-14 01:02:02,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:02:02,388 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-14 01:02:02,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 52 [2025-03-14 01:02:02,470 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-14 01:02:02,470 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:02:02,895 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2025-03-14 01:02:02,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 210 [2025-03-14 01:02:07,861 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-14 01:02:07,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458641940] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:02:07,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:02:07,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 11, 9] total 38 [2025-03-14 01:02:07,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078073948] [2025-03-14 01:02:07,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:02:07,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-14 01:02:07,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:02:07,862 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-14 01:02:07,862 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1257, Unknown=0, NotChecked=0, Total=1406 [2025-03-14 01:02:07,862 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 31 [2025-03-14 01:02:07,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 375 transitions, 5921 flow. Second operand has 38 states, 38 states have (on average 5.7631578947368425) internal successors, (219), 38 states have internal predecessors, (219), 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) [2025-03-14 01:02:07,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:02:07,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 31 [2025-03-14 01:02:07,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:02:12,279 INFO L124 PetriNetUnfolderBase]: 4083/5984 cut-off events. [2025-03-14 01:02:12,280 INFO L125 PetriNetUnfolderBase]: For 205581/205581 co-relation queries the response was YES. [2025-03-14 01:02:12,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54746 conditions, 5984 events. 4083/5984 cut-off events. For 205581/205581 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 30993 event pairs, 740 based on Foata normal form. 1/5985 useless extension candidates. Maximal degree in co-relation 54548. Up to 4406 conditions per place. [2025-03-14 01:02:12,348 INFO L140 encePairwiseOnDemand]: 15/31 looper letters, 317 selfloop transitions, 181 changer transitions 2/501 dead transitions. [2025-03-14 01:02:12,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 501 transitions, 8641 flow [2025-03-14 01:02:12,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-14 01:02:12,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-03-14 01:02:12,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 268 transitions. [2025-03-14 01:02:12,349 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.29810901001112344 [2025-03-14 01:02:12,349 INFO L175 Difference]: Start difference. First operand has 216 places, 375 transitions, 5921 flow. Second operand 29 states and 268 transitions. [2025-03-14 01:02:12,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 501 transitions, 8641 flow [2025-03-14 01:02:12,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 501 transitions, 8390 flow, removed 100 selfloop flow, removed 7 redundant places. [2025-03-14 01:02:12,840 INFO L231 Difference]: Finished difference. Result has 241 places, 421 transitions, 6836 flow [2025-03-14 01:02:12,841 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5672, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=6836, PETRI_PLACES=241, PETRI_TRANSITIONS=421} [2025-03-14 01:02:12,842 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 210 predicate places. [2025-03-14 01:02:12,842 INFO L471 AbstractCegarLoop]: Abstraction has has 241 places, 421 transitions, 6836 flow [2025-03-14 01:02:12,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.7631578947368425) internal successors, (219), 38 states have internal predecessors, (219), 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) [2025-03-14 01:02:12,842 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:02:12,842 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:02:12,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-14 01:02:13,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:02:13,043 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:02:13,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:02:13,044 INFO L85 PathProgramCache]: Analyzing trace with hash 545778065, now seen corresponding path program 11 times [2025-03-14 01:02:13,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:02:13,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648990165] [2025-03-14 01:02:13,044 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 01:02:13,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:02:13,053 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 39 statements into 5 equivalence classes. [2025-03-14 01:02:13,095 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 39 of 39 statements. [2025-03-14 01:02:13,095 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-03-14 01:02:13,095 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat