./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-buffer-series2.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 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 17:35:21,342 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 17:35:21,397 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 17:35:21,403 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 17:35:21,403 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 17:35:21,424 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 17:35:21,425 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 17:35:21,425 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 17:35:21,426 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 17:35:21,426 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 17:35:21,427 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 17:35:21,427 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 17:35:21,427 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 17:35:21,427 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 17:35:21,427 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 17:35:21,427 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 17:35:21,427 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 17:35:21,427 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 17:35:21,427 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 17:35:21,427 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 17:35:21,427 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 17:35:21,427 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 17:35:21,427 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 17:35:21,427 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 17:35:21,427 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 17:35:21,427 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 17:35:21,428 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 17:35:21,428 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 17:35:21,428 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 17:35:21,428 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 17:35:21,428 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 17:35:21,428 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 17:35:21,428 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:35:21,428 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 17:35:21,428 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 17:35:21,428 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 17:35:21,428 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 17:35:21,428 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 17:35:21,428 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 17:35:21,428 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 17:35:21,428 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 17:35:21,428 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 17:35:21,428 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 17:35:21,428 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 -> 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 [2025-03-08 17:35:21,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 17:35:21,662 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 17:35:21,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 17:35:21,664 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 17:35:21,665 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 17:35:21,665 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2025-03-08 17:35:22,771 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8441cb56/c8d2fcfd224040eea777d1dd3666df8b/FLAGe48100a2b [2025-03-08 17:35:22,999 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 17:35:23,000 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2025-03-08 17:35:23,010 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8441cb56/c8d2fcfd224040eea777d1dd3666df8b/FLAGe48100a2b [2025-03-08 17:35:23,332 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8441cb56/c8d2fcfd224040eea777d1dd3666df8b [2025-03-08 17:35:23,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 17:35:23,336 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 17:35:23,337 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 17:35:23,337 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 17:35:23,340 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 17:35:23,341 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:35:23" (1/1) ... [2025-03-08 17:35:23,344 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38ef1198 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:23, skipping insertion in model container [2025-03-08 17:35:23,344 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:35:23" (1/1) ... [2025-03-08 17:35:23,358 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 17:35:23,468 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/popl20-more-buffer-series2.wvr.c[4284,4297] [2025-03-08 17:35:23,475 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:35:23,484 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 17:35:23,512 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/popl20-more-buffer-series2.wvr.c[4284,4297] [2025-03-08 17:35:23,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:35:23,527 INFO L204 MainTranslator]: Completed translation [2025-03-08 17:35:23,528 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:23 WrapperNode [2025-03-08 17:35:23,528 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 17:35:23,529 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 17:35:23,529 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 17:35:23,529 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 17:35:23,533 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:23" (1/1) ... [2025-03-08 17:35:23,539 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:23" (1/1) ... [2025-03-08 17:35:23,557 INFO L138 Inliner]: procedures = 26, calls = 63, calls flagged for inlining = 22, calls inlined = 28, statements flattened = 315 [2025-03-08 17:35:23,557 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 17:35:23,558 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 17:35:23,558 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 17:35:23,558 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 17:35:23,564 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:23" (1/1) ... [2025-03-08 17:35:23,564 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:23" (1/1) ... [2025-03-08 17:35:23,569 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:23" (1/1) ... [2025-03-08 17:35:23,594 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 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]. [2025-03-08 17:35:23,597 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:23" (1/1) ... [2025-03-08 17:35:23,598 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:23" (1/1) ... [2025-03-08 17:35:23,608 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:23" (1/1) ... [2025-03-08 17:35:23,609 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:23" (1/1) ... [2025-03-08 17:35:23,610 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:23" (1/1) ... [2025-03-08 17:35:23,611 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:23" (1/1) ... [2025-03-08 17:35:23,618 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 17:35:23,619 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 17:35:23,619 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 17:35:23,619 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 17:35:23,620 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:23" (1/1) ... [2025-03-08 17:35:23,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:35:23,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:35:23,643 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 17:35:23,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 17:35:23,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 17:35:23,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 17:35:23,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 17:35:23,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 17:35:23,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 17:35:23,667 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-08 17:35:23,667 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-08 17:35:23,667 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-08 17:35:23,668 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-08 17:35:23,668 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-08 17:35:23,668 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-08 17:35:23,668 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-03-08 17:35:23,668 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-03-08 17:35:23,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 17:35:23,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 17:35:23,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-08 17:35:23,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-08 17:35:23,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-08 17:35:23,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 17:35:23,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 17:35:23,670 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-08 17:35:23,770 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 17:35:23,771 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 17:35:24,156 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 17:35:24,156 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 17:35:24,401 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 17:35:24,402 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 17:35:24,402 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:35:24 BoogieIcfgContainer [2025-03-08 17:35:24,402 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 17:35:24,404 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 17:35:24,404 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 17:35:24,407 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 17:35:24,407 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:35:23" (1/3) ... [2025-03-08 17:35:24,408 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ba8b8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:35:24, skipping insertion in model container [2025-03-08 17:35:24,408 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:23" (2/3) ... [2025-03-08 17:35:24,408 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ba8b8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:35:24, skipping insertion in model container [2025-03-08 17:35:24,408 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:35:24" (3/3) ... [2025-03-08 17:35:24,409 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series2.wvr.c [2025-03-08 17:35:24,424 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 17:35:24,425 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-buffer-series2.wvr.c that has 5 procedures, 44 locations, 1 initial locations, 7 loop locations, and 1 error locations. [2025-03-08 17:35:24,426 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 17:35:24,481 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-08 17:35:24,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 50 transitions, 128 flow [2025-03-08 17:35:24,533 INFO L124 PetriNetUnfolderBase]: 7/46 cut-off events. [2025-03-08 17:35:24,535 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-08 17:35:24,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 46 events. 7/46 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 71 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2025-03-08 17:35:24,538 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 50 transitions, 128 flow [2025-03-08 17:35:24,541 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 45 transitions, 114 flow [2025-03-08 17:35:24,546 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:35:24,557 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;@12d7ad61, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:35:24,557 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-03-08 17:35:24,571 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:35:24,571 INFO L124 PetriNetUnfolderBase]: 7/44 cut-off events. [2025-03-08 17:35:24,571 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-08 17:35:24,571 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:24,572 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, 1, 1, 1, 1, 1] [2025-03-08 17:35:24,572 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 2 more)] === [2025-03-08 17:35:24,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:24,577 INFO L85 PathProgramCache]: Analyzing trace with hash 685516359, now seen corresponding path program 1 times [2025-03-08 17:35:24,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:24,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871207304] [2025-03-08 17:35:24,582 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:35:24,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:24,647 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-08 17:35:24,703 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 17:35:24,703 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:35:24,703 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:35:24,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:24,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871207304] [2025-03-08 17:35:24,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871207304] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:24,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:24,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 17:35:24,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114038928] [2025-03-08 17:35:24,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:24,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:35:24,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:24,928 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:35:24,929 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:35:24,930 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-03-08 17:35:24,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:24,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:24,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-03-08 17:35:24,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:25,508 INFO L124 PetriNetUnfolderBase]: 3683/5094 cut-off events. [2025-03-08 17:35:25,509 INFO L125 PetriNetUnfolderBase]: For 374/374 co-relation queries the response was YES. [2025-03-08 17:35:25,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10280 conditions, 5094 events. 3683/5094 cut-off events. For 374/374 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 24720 event pairs, 1024 based on Foata normal form. 1/4970 useless extension candidates. Maximal degree in co-relation 9160. Up to 3095 conditions per place. [2025-03-08 17:35:25,551 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 53 selfloop transitions, 3 changer transitions 1/66 dead transitions. [2025-03-08 17:35:25,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 66 transitions, 285 flow [2025-03-08 17:35:25,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:35:25,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:35:25,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 97 transitions. [2025-03-08 17:35:25,563 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6466666666666666 [2025-03-08 17:35:25,564 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 114 flow. Second operand 3 states and 97 transitions. [2025-03-08 17:35:25,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 66 transitions, 285 flow [2025-03-08 17:35:25,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 66 transitions, 259 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-08 17:35:25,583 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 117 flow [2025-03-08 17:35:25,585 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2025-03-08 17:35:25,587 INFO L279 CegarLoopForPetriNet]: 51 programPoint places, -5 predicate places. [2025-03-08 17:35:25,589 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 117 flow [2025-03-08 17:35:25,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:25,590 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:25,590 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, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:25,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 17:35:25,591 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 2 more)] === [2025-03-08 17:35:25,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:25,592 INFO L85 PathProgramCache]: Analyzing trace with hash -820236404, now seen corresponding path program 1 times [2025-03-08 17:35:25,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:25,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841877659] [2025-03-08 17:35:25,592 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:35:25,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:25,610 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-08 17:35:25,636 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-08 17:35:25,637 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:35:25,637 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:35:25,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:25,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841877659] [2025-03-08 17:35:25,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841877659] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:25,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:25,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 17:35:25,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225326699] [2025-03-08 17:35:25,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:25,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:35:25,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:25,793 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:35:25,793 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:35:25,793 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-03-08 17:35:25,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:25,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:25,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-03-08 17:35:25,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:26,267 INFO L124 PetriNetUnfolderBase]: 4691/6608 cut-off events. [2025-03-08 17:35:26,267 INFO L125 PetriNetUnfolderBase]: For 877/877 co-relation queries the response was YES. [2025-03-08 17:35:26,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13881 conditions, 6608 events. 4691/6608 cut-off events. For 877/877 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 34892 event pairs, 1685 based on Foata normal form. 186/6711 useless extension candidates. Maximal degree in co-relation 5587. Up to 3904 conditions per place. [2025-03-08 17:35:26,298 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 61 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2025-03-08 17:35:26,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 72 transitions, 307 flow [2025-03-08 17:35:26,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:35:26,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:35:26,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2025-03-08 17:35:26,300 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2025-03-08 17:35:26,301 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 117 flow. Second operand 3 states and 100 transitions. [2025-03-08 17:35:26,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 72 transitions, 307 flow [2025-03-08 17:35:26,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 72 transitions, 303 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-08 17:35:26,302 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 128 flow [2025-03-08 17:35:26,302 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2025-03-08 17:35:26,303 INFO L279 CegarLoopForPetriNet]: 51 programPoint places, -3 predicate places. [2025-03-08 17:35:26,303 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 128 flow [2025-03-08 17:35:26,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:26,303 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:26,303 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, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:26,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 17:35:26,304 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 2 more)] === [2025-03-08 17:35:26,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:26,305 INFO L85 PathProgramCache]: Analyzing trace with hash -195990480, now seen corresponding path program 1 times [2025-03-08 17:35:26,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:26,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200472973] [2025-03-08 17:35:26,306 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:35:26,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:26,320 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-08 17:35:26,329 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-08 17:35:26,330 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:35:26,330 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:35:26,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:26,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200472973] [2025-03-08 17:35:26,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200472973] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:26,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:26,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 17:35:26,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167582918] [2025-03-08 17:35:26,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:26,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:35:26,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:26,414 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:35:26,414 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:35:26,414 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-03-08 17:35:26,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:26,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:26,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-03-08 17:35:26,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:26,952 INFO L124 PetriNetUnfolderBase]: 5825/8336 cut-off events. [2025-03-08 17:35:26,952 INFO L125 PetriNetUnfolderBase]: For 2259/2259 co-relation queries the response was YES. [2025-03-08 17:35:26,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18106 conditions, 8336 events. 5825/8336 cut-off events. For 2259/2259 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 45473 event pairs, 2031 based on Foata normal form. 138/8390 useless extension candidates. Maximal degree in co-relation 11513. Up to 4926 conditions per place. [2025-03-08 17:35:26,990 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 61 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2025-03-08 17:35:26,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 72 transitions, 323 flow [2025-03-08 17:35:26,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:35:26,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:35:26,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2025-03-08 17:35:26,992 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2025-03-08 17:35:26,992 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 128 flow. Second operand 3 states and 98 transitions. [2025-03-08 17:35:26,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 72 transitions, 323 flow [2025-03-08 17:35:26,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 72 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-08 17:35:26,994 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 140 flow [2025-03-08 17:35:26,995 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2025-03-08 17:35:26,995 INFO L279 CegarLoopForPetriNet]: 51 programPoint places, -1 predicate places. [2025-03-08 17:35:26,995 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 140 flow [2025-03-08 17:35:26,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:26,995 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:26,995 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:26,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 17:35:26,996 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 2 more)] === [2025-03-08 17:35:26,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:26,997 INFO L85 PathProgramCache]: Analyzing trace with hash -311527695, now seen corresponding path program 1 times [2025-03-08 17:35:26,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:26,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457388248] [2025-03-08 17:35:26,997 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:35:26,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:27,009 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-08 17:35:27,021 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-08 17:35:27,022 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:35:27,023 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:35:27,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:27,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457388248] [2025-03-08 17:35:27,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457388248] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:27,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:27,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:35:27,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095734943] [2025-03-08 17:35:27,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:27,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:35:27,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:27,158 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:35:27,158 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:35:27,158 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-03-08 17:35:27,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 140 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:27,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:27,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-03-08 17:35:27,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:28,027 INFO L124 PetriNetUnfolderBase]: 7724/11131 cut-off events. [2025-03-08 17:35:28,027 INFO L125 PetriNetUnfolderBase]: For 4122/4122 co-relation queries the response was YES. [2025-03-08 17:35:28,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25180 conditions, 11131 events. 7724/11131 cut-off events. For 4122/4122 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 64502 event pairs, 6327 based on Foata normal form. 211/11224 useless extension candidates. Maximal degree in co-relation 13294. Up to 7788 conditions per place. [2025-03-08 17:35:28,065 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 70 selfloop transitions, 3 changer transitions 0/82 dead transitions. [2025-03-08 17:35:28,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 82 transitions, 375 flow [2025-03-08 17:35:28,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:35:28,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:35:28,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2025-03-08 17:35:28,067 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2025-03-08 17:35:28,067 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 140 flow. Second operand 4 states and 120 transitions. [2025-03-08 17:35:28,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 82 transitions, 375 flow [2025-03-08 17:35:28,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 82 transitions, 372 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-08 17:35:28,069 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 158 flow [2025-03-08 17:35:28,069 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2025-03-08 17:35:28,071 INFO L279 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2025-03-08 17:35:28,071 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 158 flow [2025-03-08 17:35:28,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:28,072 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:28,072 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:28,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 17:35:28,072 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 2 more)] === [2025-03-08 17:35:28,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:28,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1759052763, now seen corresponding path program 1 times [2025-03-08 17:35:28,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:28,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181642257] [2025-03-08 17:35:28,073 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:35:28,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:28,083 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-08 17:35:28,096 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-08 17:35:28,096 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:35:28,098 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:35:28,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:28,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181642257] [2025-03-08 17:35:28,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181642257] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:28,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:28,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:35:28,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119124518] [2025-03-08 17:35:28,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:28,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:35:28,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:28,212 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:35:28,212 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:35:28,212 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-03-08 17:35:28,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:28,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:28,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-03-08 17:35:28,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:29,016 INFO L124 PetriNetUnfolderBase]: 10320/15084 cut-off events. [2025-03-08 17:35:29,017 INFO L125 PetriNetUnfolderBase]: For 5630/5630 co-relation queries the response was YES. [2025-03-08 17:35:29,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33506 conditions, 15084 events. 10320/15084 cut-off events. For 5630/5630 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 93289 event pairs, 8685 based on Foata normal form. 335/15268 useless extension candidates. Maximal degree in co-relation 25637. Up to 10448 conditions per place. [2025-03-08 17:35:29,068 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 69 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2025-03-08 17:35:29,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 82 transitions, 390 flow [2025-03-08 17:35:29,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:35:29,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:35:29,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2025-03-08 17:35:29,069 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.59 [2025-03-08 17:35:29,069 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 158 flow. Second operand 4 states and 118 transitions. [2025-03-08 17:35:29,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 82 transitions, 390 flow [2025-03-08 17:35:29,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 82 transitions, 386 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-08 17:35:29,071 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 177 flow [2025-03-08 17:35:29,072 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2025-03-08 17:35:29,073 INFO L279 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2025-03-08 17:35:29,074 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 177 flow [2025-03-08 17:35:29,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:29,074 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:29,074 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:29,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-08 17:35:29,074 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 2 more)] === [2025-03-08 17:35:29,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:29,075 INFO L85 PathProgramCache]: Analyzing trace with hash 585961973, now seen corresponding path program 1 times [2025-03-08 17:35:29,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:29,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737118866] [2025-03-08 17:35:29,078 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:35:29,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:29,091 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-08 17:35:29,107 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 17:35:29,107 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:35:29,107 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:35:29,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:29,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737118866] [2025-03-08 17:35:29,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737118866] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:29,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:29,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:35:29,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122154469] [2025-03-08 17:35:29,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:29,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:35:29,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:29,324 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:35:29,324 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-08 17:35:29,326 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-03-08 17:35:29,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 177 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:29,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:29,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-03-08 17:35:29,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:30,952 INFO L124 PetriNetUnfolderBase]: 18964/27287 cut-off events. [2025-03-08 17:35:30,953 INFO L125 PetriNetUnfolderBase]: For 8840/8891 co-relation queries the response was YES. [2025-03-08 17:35:30,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60788 conditions, 27287 events. 18964/27287 cut-off events. For 8840/8891 co-relation queries the response was YES. Maximal size of possible extension queue 956. Compared 177821 event pairs, 8099 based on Foata normal form. 21/26020 useless extension candidates. Maximal degree in co-relation 46946. Up to 9991 conditions per place. [2025-03-08 17:35:31,039 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 109 selfloop transitions, 7 changer transitions 0/124 dead transitions. [2025-03-08 17:35:31,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 124 transitions, 614 flow [2025-03-08 17:35:31,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:35:31,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:35:31,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2025-03-08 17:35:31,040 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2025-03-08 17:35:31,040 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 177 flow. Second operand 6 states and 176 transitions. [2025-03-08 17:35:31,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 124 transitions, 614 flow [2025-03-08 17:35:31,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 124 transitions, 609 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-08 17:35:31,044 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 207 flow [2025-03-08 17:35:31,044 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2025-03-08 17:35:31,044 INFO L279 CegarLoopForPetriNet]: 51 programPoint places, 14 predicate places. [2025-03-08 17:35:31,045 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 207 flow [2025-03-08 17:35:31,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:31,045 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:31,045 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:31,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-08 17:35:31,045 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 2 more)] === [2025-03-08 17:35:31,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:31,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1137195063, now seen corresponding path program 1 times [2025-03-08 17:35:31,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:31,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611648072] [2025-03-08 17:35:31,046 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:35:31,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:31,055 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-08 17:35:31,071 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 17:35:31,071 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:35:31,071 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:31,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:35:31,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:31,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611648072] [2025-03-08 17:35:31,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611648072] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:31,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:31,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:35:31,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288414437] [2025-03-08 17:35:31,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:31,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:35:31,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:31,270 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:35:31,270 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-08 17:35:31,270 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-03-08 17:35:31,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 207 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:31,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:31,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-03-08 17:35:31,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:32,448 INFO L124 PetriNetUnfolderBase]: 15658/23022 cut-off events. [2025-03-08 17:35:32,448 INFO L125 PetriNetUnfolderBase]: For 10390/10402 co-relation queries the response was YES. [2025-03-08 17:35:32,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52899 conditions, 23022 events. 15658/23022 cut-off events. For 10390/10402 co-relation queries the response was YES. Maximal size of possible extension queue 778. Compared 152136 event pairs, 11917 based on Foata normal form. 0/21860 useless extension candidates. Maximal degree in co-relation 38126. Up to 18334 conditions per place. [2025-03-08 17:35:32,547 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 42 selfloop transitions, 4 changer transitions 34/88 dead transitions. [2025-03-08 17:35:32,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 88 transitions, 446 flow [2025-03-08 17:35:32,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:35:32,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:35:32,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2025-03-08 17:35:32,549 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2025-03-08 17:35:32,549 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 207 flow. Second operand 6 states and 145 transitions. [2025-03-08 17:35:32,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 88 transitions, 446 flow [2025-03-08 17:35:32,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 88 transitions, 440 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-03-08 17:35:32,557 INFO L231 Difference]: Finished difference. Result has 70 places, 54 transitions, 201 flow [2025-03-08 17:35:32,557 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=201, PETRI_PLACES=70, PETRI_TRANSITIONS=54} [2025-03-08 17:35:32,558 INFO L279 CegarLoopForPetriNet]: 51 programPoint places, 19 predicate places. [2025-03-08 17:35:32,559 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 54 transitions, 201 flow [2025-03-08 17:35:32,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:32,559 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:32,559 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:32,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-08 17:35:32,559 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 2 more)] === [2025-03-08 17:35:32,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:32,560 INFO L85 PathProgramCache]: Analyzing trace with hash -583007327, now seen corresponding path program 1 times [2025-03-08 17:35:32,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:32,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790465448] [2025-03-08 17:35:32,560 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:35:32,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:32,574 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-08 17:35:32,591 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-08 17:35:32,591 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:35:32,591 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:35:32,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:32,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790465448] [2025-03-08 17:35:32,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790465448] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:32,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:32,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:35:32,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117300130] [2025-03-08 17:35:32,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:32,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:35:32,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:32,846 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:35:32,846 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-03-08 17:35:32,850 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-03-08 17:35:32,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 54 transitions, 201 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:32,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:32,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-03-08 17:35:32,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:33,485 INFO L124 PetriNetUnfolderBase]: 8292/12712 cut-off events. [2025-03-08 17:35:33,486 INFO L125 PetriNetUnfolderBase]: For 6354/6354 co-relation queries the response was YES. [2025-03-08 17:35:33,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30380 conditions, 12712 events. 8292/12712 cut-off events. For 6354/6354 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 81138 event pairs, 1465 based on Foata normal form. 684/13322 useless extension candidates. Maximal degree in co-relation 22885. Up to 6744 conditions per place. [2025-03-08 17:35:33,542 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 75 selfloop transitions, 5 changer transitions 1/90 dead transitions. [2025-03-08 17:35:33,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 90 transitions, 473 flow [2025-03-08 17:35:33,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:35:33,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:35:33,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2025-03-08 17:35:33,543 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49666666666666665 [2025-03-08 17:35:33,543 INFO L175 Difference]: Start difference. First operand has 70 places, 54 transitions, 201 flow. Second operand 6 states and 149 transitions. [2025-03-08 17:35:33,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 90 transitions, 473 flow [2025-03-08 17:35:33,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 90 transitions, 453 flow, removed 6 selfloop flow, removed 7 redundant places. [2025-03-08 17:35:33,628 INFO L231 Difference]: Finished difference. Result has 65 places, 53 transitions, 190 flow [2025-03-08 17:35:33,628 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=190, PETRI_PLACES=65, PETRI_TRANSITIONS=53} [2025-03-08 17:35:33,628 INFO L279 CegarLoopForPetriNet]: 51 programPoint places, 14 predicate places. [2025-03-08 17:35:33,628 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 53 transitions, 190 flow [2025-03-08 17:35:33,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:33,629 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:33,629 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:33,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-08 17:35:33,629 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 2 more)] === [2025-03-08 17:35:33,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:33,629 INFO L85 PathProgramCache]: Analyzing trace with hash -2022438789, now seen corresponding path program 1 times [2025-03-08 17:35:33,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:33,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229597847] [2025-03-08 17:35:33,629 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:35:33,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:33,641 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-08 17:35:33,651 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-08 17:35:33,651 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:35:33,651 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:35:33,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:33,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229597847] [2025-03-08 17:35:33,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229597847] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:33,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:33,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:35:33,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010981711] [2025-03-08 17:35:33,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:33,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:35:33,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:33,835 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:35:33,836 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-03-08 17:35:33,839 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-03-08 17:35:33,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 53 transitions, 190 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:33,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:33,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-03-08 17:35:33,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:34,443 INFO L124 PetriNetUnfolderBase]: 5174/7693 cut-off events. [2025-03-08 17:35:34,444 INFO L125 PetriNetUnfolderBase]: For 5724/5724 co-relation queries the response was YES. [2025-03-08 17:35:34,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18851 conditions, 7693 events. 5174/7693 cut-off events. For 5724/5724 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 43788 event pairs, 908 based on Foata normal form. 372/8029 useless extension candidates. Maximal degree in co-relation 15380. Up to 4362 conditions per place. [2025-03-08 17:35:34,477 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 76 selfloop transitions, 5 changer transitions 1/91 dead transitions. [2025-03-08 17:35:34,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 91 transitions, 480 flow [2025-03-08 17:35:34,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:35:34,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:35:34,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2025-03-08 17:35:34,478 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5033333333333333 [2025-03-08 17:35:34,478 INFO L175 Difference]: Start difference. First operand has 65 places, 53 transitions, 190 flow. Second operand 6 states and 151 transitions. [2025-03-08 17:35:34,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 91 transitions, 480 flow [2025-03-08 17:35:34,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 91 transitions, 456 flow, removed 3 selfloop flow, removed 6 redundant places. [2025-03-08 17:35:34,483 INFO L231 Difference]: Finished difference. Result has 64 places, 52 transitions, 182 flow [2025-03-08 17:35:34,483 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=64, PETRI_TRANSITIONS=52} [2025-03-08 17:35:34,484 INFO L279 CegarLoopForPetriNet]: 51 programPoint places, 13 predicate places. [2025-03-08 17:35:34,484 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 52 transitions, 182 flow [2025-03-08 17:35:34,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:34,484 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:34,484 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:34,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-08 17:35:34,484 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 2 more)] === [2025-03-08 17:35:34,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:34,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1234297168, now seen corresponding path program 1 times [2025-03-08 17:35:34,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:34,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782728628] [2025-03-08 17:35:34,485 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:35:34,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:34,495 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-08 17:35:34,511 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-08 17:35:34,513 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:35:34,513 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:34,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 17:35:34,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:34,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782728628] [2025-03-08 17:35:34,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782728628] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:34,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:34,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:35:34,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466655750] [2025-03-08 17:35:34,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:34,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:35:34,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:34,669 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:35:34,669 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 17:35:34,672 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-03-08 17:35:34,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 52 transitions, 182 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:34,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:34,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-03-08 17:35:34,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:35,546 INFO L124 PetriNetUnfolderBase]: 7068/10133 cut-off events. [2025-03-08 17:35:35,547 INFO L125 PetriNetUnfolderBase]: For 7966/7966 co-relation queries the response was YES. [2025-03-08 17:35:35,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25948 conditions, 10133 events. 7068/10133 cut-off events. For 7966/7966 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 56017 event pairs, 1593 based on Foata normal form. 228/10313 useless extension candidates. Maximal degree in co-relation 25921. Up to 3692 conditions per place. [2025-03-08 17:35:35,599 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 96 selfloop transitions, 11 changer transitions 0/116 dead transitions. [2025-03-08 17:35:35,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 116 transitions, 624 flow [2025-03-08 17:35:35,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:35:35,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:35:35,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2025-03-08 17:35:35,600 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5766666666666667 [2025-03-08 17:35:35,600 INFO L175 Difference]: Start difference. First operand has 64 places, 52 transitions, 182 flow. Second operand 6 states and 173 transitions. [2025-03-08 17:35:35,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 116 transitions, 624 flow [2025-03-08 17:35:35,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 116 transitions, 597 flow, removed 4 selfloop flow, removed 6 redundant places. [2025-03-08 17:35:35,606 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 259 flow [2025-03-08 17:35:35,606 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=259, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2025-03-08 17:35:35,606 INFO L279 CegarLoopForPetriNet]: 51 programPoint places, 15 predicate places. [2025-03-08 17:35:35,606 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 259 flow [2025-03-08 17:35:35,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:35,607 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:35,607 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:35,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-08 17:35:35,607 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 2 more)] === [2025-03-08 17:35:35,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:35,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1517245342, now seen corresponding path program 2 times [2025-03-08 17:35:35,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:35,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023327886] [2025-03-08 17:35:35,608 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:35:35,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:35,622 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-03-08 17:35:35,638 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 36 of 42 statements. [2025-03-08 17:35:35,638 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-08 17:35:35,638 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 17:35:35,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:35,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023327886] [2025-03-08 17:35:35,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023327886] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:35,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:35,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-08 17:35:35,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166392612] [2025-03-08 17:35:35,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:35,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 17:35:35,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:35,930 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 17:35:35,930 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-08 17:35:35,935 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-03-08 17:35:35,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 259 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:35,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:35,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-03-08 17:35:35,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:37,120 INFO L124 PetriNetUnfolderBase]: 11309/16101 cut-off events. [2025-03-08 17:35:37,120 INFO L125 PetriNetUnfolderBase]: For 21111/21111 co-relation queries the response was YES. [2025-03-08 17:35:37,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47076 conditions, 16101 events. 11309/16101 cut-off events. For 21111/21111 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 93779 event pairs, 1057 based on Foata normal form. 308/16401 useless extension candidates. Maximal degree in co-relation 47047. Up to 10690 conditions per place. [2025-03-08 17:35:37,187 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 136 selfloop transitions, 15 changer transitions 0/159 dead transitions. [2025-03-08 17:35:37,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 159 transitions, 919 flow [2025-03-08 17:35:37,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 17:35:37,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-08 17:35:37,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2025-03-08 17:35:37,188 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5377777777777778 [2025-03-08 17:35:37,188 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 259 flow. Second operand 9 states and 242 transitions. [2025-03-08 17:35:37,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 159 transitions, 919 flow [2025-03-08 17:35:37,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 159 transitions, 916 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-08 17:35:37,204 INFO L231 Difference]: Finished difference. Result has 80 places, 73 transitions, 412 flow [2025-03-08 17:35:37,204 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=412, PETRI_PLACES=80, PETRI_TRANSITIONS=73} [2025-03-08 17:35:37,205 INFO L279 CegarLoopForPetriNet]: 51 programPoint places, 29 predicate places. [2025-03-08 17:35:37,205 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 73 transitions, 412 flow [2025-03-08 17:35:37,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:37,205 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:37,205 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:37,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-08 17:35:37,205 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 2 more)] === [2025-03-08 17:35:37,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:37,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1398538068, now seen corresponding path program 3 times [2025-03-08 17:35:37,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:37,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309444970] [2025-03-08 17:35:37,206 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:35:37,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:37,216 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 42 statements into 2 equivalence classes. [2025-03-08 17:35:37,234 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-03-08 17:35:37,234 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:35:37,234 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:37,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-08 17:35:37,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:37,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309444970] [2025-03-08 17:35:37,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309444970] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:37,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:37,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:35:37,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114925347] [2025-03-08 17:35:37,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:37,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:35:37,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:37,466 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:35:37,466 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-03-08 17:35:37,472 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-03-08 17:35:37,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 73 transitions, 412 flow. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:37,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:37,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-03-08 17:35:37,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:38,743 INFO L124 PetriNetUnfolderBase]: 15441/21158 cut-off events. [2025-03-08 17:35:38,743 INFO L125 PetriNetUnfolderBase]: For 44553/44641 co-relation queries the response was YES. [2025-03-08 17:35:38,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70204 conditions, 21158 events. 15441/21158 cut-off events. For 44553/44641 co-relation queries the response was YES. Maximal size of possible extension queue 823. Compared 121912 event pairs, 1912 based on Foata normal form. 273/21354 useless extension candidates. Maximal degree in co-relation 70167. Up to 7788 conditions per place. [2025-03-08 17:35:39,031 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 135 selfloop transitions, 32 changer transitions 0/176 dead transitions. [2025-03-08 17:35:39,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 176 transitions, 1427 flow [2025-03-08 17:35:39,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:35:39,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:35:39,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2025-03-08 17:35:39,033 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.612 [2025-03-08 17:35:39,033 INFO L175 Difference]: Start difference. First operand has 80 places, 73 transitions, 412 flow. Second operand 5 states and 153 transitions. [2025-03-08 17:35:39,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 176 transitions, 1427 flow [2025-03-08 17:35:39,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 176 transitions, 1400 flow, removed 4 selfloop flow, removed 1 redundant places. [2025-03-08 17:35:39,105 INFO L231 Difference]: Finished difference. Result has 87 places, 100 transitions, 793 flow [2025-03-08 17:35:39,105 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=793, PETRI_PLACES=87, PETRI_TRANSITIONS=100} [2025-03-08 17:35:39,105 INFO L279 CegarLoopForPetriNet]: 51 programPoint places, 36 predicate places. [2025-03-08 17:35:39,106 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 100 transitions, 793 flow [2025-03-08 17:35:39,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:39,106 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:39,106 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:39,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-08 17:35:39,106 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 2 more)] === [2025-03-08 17:35:39,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:39,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1069479332, now seen corresponding path program 4 times [2025-03-08 17:35:39,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:39,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963335608] [2025-03-08 17:35:39,107 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:35:39,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:39,114 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 42 statements into 2 equivalence classes. [2025-03-08 17:35:39,125 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-03-08 17:35:39,126 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:35:39,126 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:35:39,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:39,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963335608] [2025-03-08 17:35:39,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963335608] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:35:39,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22960858] [2025-03-08 17:35:39,256 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:35:39,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:35:39,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:35:39,258 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:35:39,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 17:35:39,323 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 42 statements into 2 equivalence classes. [2025-03-08 17:35:39,357 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-03-08 17:35:39,357 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:35:39,357 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:39,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-08 17:35:39,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:35:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:35:39,574 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:35:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:35:39,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22960858] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 17:35:39,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-08 17:35:39,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 7] total 17 [2025-03-08 17:35:39,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886175736] [2025-03-08 17:35:39,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:39,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-08 17:35:39,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:39,757 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-08 17:35:39,758 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2025-03-08 17:35:39,762 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2025-03-08 17:35:39,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 100 transitions, 793 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:39,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:39,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2025-03-08 17:35:39,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:42,652 INFO L124 PetriNetUnfolderBase]: 28607/39243 cut-off events. [2025-03-08 17:35:42,652 INFO L125 PetriNetUnfolderBase]: For 133593/135053 co-relation queries the response was YES. [2025-03-08 17:35:42,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145819 conditions, 39243 events. 28607/39243 cut-off events. For 133593/135053 co-relation queries the response was YES. Maximal size of possible extension queue 1559. Compared 240519 event pairs, 969 based on Foata normal form. 430/39521 useless extension candidates. Maximal degree in co-relation 145779. Up to 13051 conditions per place. [2025-03-08 17:35:42,942 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 247 selfloop transitions, 104 changer transitions 0/358 dead transitions. [2025-03-08 17:35:42,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 358 transitions, 3108 flow [2025-03-08 17:35:42,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-08 17:35:42,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-08 17:35:42,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 366 transitions. [2025-03-08 17:35:42,947 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.563076923076923 [2025-03-08 17:35:42,947 INFO L175 Difference]: Start difference. First operand has 87 places, 100 transitions, 793 flow. Second operand 13 states and 366 transitions. [2025-03-08 17:35:42,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 358 transitions, 3108 flow [2025-03-08 17:35:43,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 358 transitions, 3108 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-08 17:35:43,174 INFO L231 Difference]: Finished difference. Result has 107 places, 180 transitions, 2026 flow [2025-03-08 17:35:43,174 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2026, PETRI_PLACES=107, PETRI_TRANSITIONS=180} [2025-03-08 17:35:43,175 INFO L279 CegarLoopForPetriNet]: 51 programPoint places, 56 predicate places. [2025-03-08 17:35:43,175 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 180 transitions, 2026 flow [2025-03-08 17:35:43,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:43,175 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:43,175 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:43,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 17:35:43,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-08 17:35:43,380 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 2 more)] === [2025-03-08 17:35:43,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:43,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1711098292, now seen corresponding path program 1 times [2025-03-08 17:35:43,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:43,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128403343] [2025-03-08 17:35:43,381 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:35:43,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:43,389 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-08 17:35:43,400 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-08 17:35:43,400 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:35:43,400 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:43,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-08 17:35:43,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:43,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128403343] [2025-03-08 17:35:43,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128403343] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:43,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:43,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:35:43,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751673604] [2025-03-08 17:35:43,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:43,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:35:43,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:43,560 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:35:43,560 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-08 17:35:43,563 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-03-08 17:35:43,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 180 transitions, 2026 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:43,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:43,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-03-08 17:35:43,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:47,113 INFO L124 PetriNetUnfolderBase]: 28712/41412 cut-off events. [2025-03-08 17:35:47,113 INFO L125 PetriNetUnfolderBase]: For 259051/261390 co-relation queries the response was YES. [2025-03-08 17:35:47,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185347 conditions, 41412 events. 28712/41412 cut-off events. For 259051/261390 co-relation queries the response was YES. Maximal size of possible extension queue 1820. Compared 283164 event pairs, 8399 based on Foata normal form. 1907/42475 useless extension candidates. Maximal degree in co-relation 185297. Up to 25616 conditions per place. [2025-03-08 17:35:47,466 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 370 selfloop transitions, 11 changer transitions 0/403 dead transitions. [2025-03-08 17:35:47,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 403 transitions, 5583 flow [2025-03-08 17:35:47,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 17:35:47,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-08 17:35:47,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2025-03-08 17:35:47,467 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5085714285714286 [2025-03-08 17:35:47,467 INFO L175 Difference]: Start difference. First operand has 107 places, 180 transitions, 2026 flow. Second operand 7 states and 178 transitions. [2025-03-08 17:35:47,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 403 transitions, 5583 flow [2025-03-08 17:35:48,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 403 transitions, 5444 flow, removed 62 selfloop flow, removed 1 redundant places. [2025-03-08 17:35:48,358 INFO L231 Difference]: Finished difference. Result has 115 places, 185 transitions, 2048 flow [2025-03-08 17:35:48,358 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1974, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2048, PETRI_PLACES=115, PETRI_TRANSITIONS=185} [2025-03-08 17:35:48,359 INFO L279 CegarLoopForPetriNet]: 51 programPoint places, 64 predicate places. [2025-03-08 17:35:48,359 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 185 transitions, 2048 flow [2025-03-08 17:35:48,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:48,359 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:48,359 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:48,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-03-08 17:35:48,359 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 2 more)] === [2025-03-08 17:35:48,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:48,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1864552124, now seen corresponding path program 5 times [2025-03-08 17:35:48,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:48,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516078104] [2025-03-08 17:35:48,360 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:35:48,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:48,369 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-03-08 17:35:48,384 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-03-08 17:35:48,384 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:35:48,384 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:35:48,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:48,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516078104] [2025-03-08 17:35:48,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516078104] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:48,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:48,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:35:48,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154203221] [2025-03-08 17:35:48,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:48,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:35:48,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:48,525 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:35:48,525 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-08 17:35:48,528 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-03-08 17:35:48,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 185 transitions, 2048 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:48,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:48,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-03-08 17:35:48,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:52,683 INFO L124 PetriNetUnfolderBase]: 26484/37926 cut-off events. [2025-03-08 17:35:52,683 INFO L125 PetriNetUnfolderBase]: For 246741/248596 co-relation queries the response was YES. [2025-03-08 17:35:52,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177914 conditions, 37926 events. 26484/37926 cut-off events. For 246741/248596 co-relation queries the response was YES. Maximal size of possible extension queue 1480. Compared 252104 event pairs, 4198 based on Foata normal form. 573/37726 useless extension candidates. Maximal degree in co-relation 177860. Up to 19344 conditions per place. [2025-03-08 17:35:53,040 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 161 selfloop transitions, 64 changer transitions 0/246 dead transitions. [2025-03-08 17:35:53,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 246 transitions, 2948 flow [2025-03-08 17:35:53,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 17:35:53,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-08 17:35:53,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2025-03-08 17:35:53,042 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-03-08 17:35:53,042 INFO L175 Difference]: Start difference. First operand has 115 places, 185 transitions, 2048 flow. Second operand 7 states and 175 transitions. [2025-03-08 17:35:53,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 246 transitions, 2948 flow [2025-03-08 17:35:53,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 246 transitions, 2930 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-03-08 17:35:53,651 INFO L231 Difference]: Finished difference. Result has 119 places, 187 transitions, 2328 flow [2025-03-08 17:35:53,652 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1885, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2328, PETRI_PLACES=119, PETRI_TRANSITIONS=187} [2025-03-08 17:35:53,652 INFO L279 CegarLoopForPetriNet]: 51 programPoint places, 68 predicate places. [2025-03-08 17:35:53,652 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 187 transitions, 2328 flow [2025-03-08 17:35:53,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:53,653 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:53,653 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:53,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-03-08 17:35:53,653 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 2 more)] === [2025-03-08 17:35:53,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:53,653 INFO L85 PathProgramCache]: Analyzing trace with hash -295292308, now seen corresponding path program 2 times [2025-03-08 17:35:53,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:53,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644634065] [2025-03-08 17:35:53,653 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:35:53,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:53,661 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-03-08 17:35:53,801 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-03-08 17:35:53,801 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:35:53,801 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:53,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 17:35:53,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:53,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644634065] [2025-03-08 17:35:53,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644634065] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:35:53,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761073934] [2025-03-08 17:35:53,919 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:35:53,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:35:53,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:35:53,921 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:35:53,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 17:35:53,984 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-03-08 17:35:54,019 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-03-08 17:35:54,019 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:35:54,019 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:54,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-08 17:35:54,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:35:54,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 17:35:54,070 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 17:35:54,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761073934] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:54,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 17:35:54,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2025-03-08 17:35:54,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6909806] [2025-03-08 17:35:54,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:54,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:35:54,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:54,071 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:35:54,071 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-08 17:35:54,074 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-03-08 17:35:54,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 187 transitions, 2328 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:54,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:54,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-03-08 17:35:54,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:36:01,819 INFO L124 PetriNetUnfolderBase]: 48490/69470 cut-off events. [2025-03-08 17:36:01,819 INFO L125 PetriNetUnfolderBase]: For 519209/523304 co-relation queries the response was YES. [2025-03-08 17:36:02,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335605 conditions, 69470 events. 48490/69470 cut-off events. For 519209/523304 co-relation queries the response was YES. Maximal size of possible extension queue 2303. Compared 485053 event pairs, 8702 based on Foata normal form. 1896/70251 useless extension candidates. Maximal degree in co-relation 335549. Up to 23857 conditions per place. [2025-03-08 17:36:02,540 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 477 selfloop transitions, 17 changer transitions 0/515 dead transitions. [2025-03-08 17:36:02,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 515 transitions, 7713 flow [2025-03-08 17:36:02,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:36:02,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:36:02,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2025-03-08 17:36:02,541 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.59 [2025-03-08 17:36:02,541 INFO L175 Difference]: Start difference. First operand has 119 places, 187 transitions, 2328 flow. Second operand 6 states and 177 transitions. [2025-03-08 17:36:02,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 515 transitions, 7713 flow [2025-03-08 17:36:04,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 515 transitions, 7528 flow, removed 18 selfloop flow, removed 5 redundant places. [2025-03-08 17:36:04,245 INFO L231 Difference]: Finished difference. Result has 123 places, 195 transitions, 2382 flow [2025-03-08 17:36:04,245 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2263, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2382, PETRI_PLACES=123, PETRI_TRANSITIONS=195} [2025-03-08 17:36:04,245 INFO L279 CegarLoopForPetriNet]: 51 programPoint places, 72 predicate places. [2025-03-08 17:36:04,245 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 195 transitions, 2382 flow [2025-03-08 17:36:04,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:36:04,246 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:36:04,246 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:36:04,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-08 17:36:04,446 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,SelfDestructingSolverStorable15 [2025-03-08 17:36:04,446 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 2 more)] === [2025-03-08 17:36:04,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:36:04,447 INFO L85 PathProgramCache]: Analyzing trace with hash 49637401, now seen corresponding path program 1 times [2025-03-08 17:36:04,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:36:04,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125024551] [2025-03-08 17:36:04,447 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:36:04,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:36:04,453 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-08 17:36:04,502 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-08 17:36:04,503 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:36:04,503 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:06,161 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:36:06,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:36:06,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125024551] [2025-03-08 17:36:06,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125024551] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:36:06,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145865979] [2025-03-08 17:36:06,162 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:36:06,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:36:06,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:36:06,164 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:36:06,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 17:36:06,225 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-08 17:36:06,261 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-08 17:36:06,261 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:36:06,261 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:36:06,263 INFO L256 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-08 17:36:06,267 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:36:06,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-08 17:36:06,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-03-08 17:36:06,394 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-03-08 17:36:06,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-03-08 17:36:06,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-08 17:36:06,492 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-08 17:36:06,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-08 17:36:06,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-08 17:36:07,045 INFO L349 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2025-03-08 17:36:07,046 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 46 treesize of output 46 [2025-03-08 17:36:07,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:36:07,055 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:36:07,994 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:36:07,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 113 [2025-03-08 17:36:08,089 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:36:08,089 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 2258 treesize of output 2190 [2025-03-08 17:36:08,219 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:36:08,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1138 treesize of output 1210 [2025-03-08 17:36:08,359 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:36:08,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 994 treesize of output 922