./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.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 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 02:22:14,038 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 02:22:14,087 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-04 02:22:14,094 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 02:22:14,094 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 02:22:14,121 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 02:22:14,122 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 02:22:14,122 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 02:22:14,122 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 02:22:14,122 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 02:22:14,122 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 02:22:14,122 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 02:22:14,122 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 02:22:14,122 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 02:22:14,122 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 02:22:14,122 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 02:22:14,123 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-04 02:22:14,123 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 02:22:14,123 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 02:22:14,123 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 02:22:14,123 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 02:22:14,123 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-04 02:22:14,123 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 02:22:14,123 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-04 02:22:14,123 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 02:22:14,123 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-04 02:22:14,123 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 02:22:14,123 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 02:22:14,123 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 02:22:14,123 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 02:22:14,123 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 02:22:14,123 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 02:22:14,123 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 02:22:14,123 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 02:22:14,123 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 02:22:14,124 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-04 02:22:14,124 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-04 02:22:14,124 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-04 02:22:14,124 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-04 02:22:14,124 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 02:22:14,124 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 02:22:14,124 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 02:22:14,124 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 02:22:14,124 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 -> 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec [2025-03-04 02:22:14,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 02:22:14,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 02:22:14,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 02:22:14,388 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 02:22:14,388 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 02:22:14,390 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2025-03-04 02:22:15,552 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c56ea658/ed7bbe6aaa9e41dcb34a2a6071f70661/FLAGb436694e4 [2025-03-04 02:22:15,824 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 02:22:15,825 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2025-03-04 02:22:15,833 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c56ea658/ed7bbe6aaa9e41dcb34a2a6071f70661/FLAGb436694e4 [2025-03-04 02:22:16,119 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c56ea658/ed7bbe6aaa9e41dcb34a2a6071f70661 [2025-03-04 02:22:16,121 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 02:22:16,122 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 02:22:16,123 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 02:22:16,123 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 02:22:16,126 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 02:22:16,126 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 02:22:16" (1/1) ... [2025-03-04 02:22:16,126 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2da7c042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:16, skipping insertion in model container [2025-03-04 02:22:16,127 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 02:22:16" (1/1) ... [2025-03-04 02:22:16,136 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 02:22:16,265 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-bad-counter-queue2.wvr.c[2297,2310] [2025-03-04 02:22:16,277 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 02:22:16,285 INFO L200 MainTranslator]: Completed pre-run [2025-03-04 02:22:16,302 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-bad-counter-queue2.wvr.c[2297,2310] [2025-03-04 02:22:16,308 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 02:22:16,321 INFO L204 MainTranslator]: Completed translation [2025-03-04 02:22:16,322 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:16 WrapperNode [2025-03-04 02:22:16,323 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 02:22:16,323 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-04 02:22:16,324 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-04 02:22:16,324 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-04 02:22:16,328 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:16" (1/1) ... [2025-03-04 02:22:16,334 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:16" (1/1) ... [2025-03-04 02:22:16,356 INFO L138 Inliner]: procedures = 25, calls = 26, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 123 [2025-03-04 02:22:16,358 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-04 02:22:16,359 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-04 02:22:16,359 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-04 02:22:16,359 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-04 02:22:16,365 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:16" (1/1) ... [2025-03-04 02:22:16,365 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:16" (1/1) ... [2025-03-04 02:22:16,367 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:16" (1/1) ... [2025-03-04 02:22:16,382 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-04 02:22:16,382 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:16" (1/1) ... [2025-03-04 02:22:16,382 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:16" (1/1) ... [2025-03-04 02:22:16,387 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:16" (1/1) ... [2025-03-04 02:22:16,390 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:16" (1/1) ... [2025-03-04 02:22:16,391 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:16" (1/1) ... [2025-03-04 02:22:16,392 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:16" (1/1) ... [2025-03-04 02:22:16,393 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-04 02:22:16,393 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-04 02:22:16,393 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-04 02:22:16,394 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-04 02:22:16,397 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:16" (1/1) ... [2025-03-04 02:22:16,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 02:22:16,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:22:16,422 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-04 02:22:16,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-04 02:22:16,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-04 02:22:16,440 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-04 02:22:16,440 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-04 02:22:16,440 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-04 02:22:16,440 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-04 02:22:16,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-04 02:22:16,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-04 02:22:16,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-04 02:22:16,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-04 02:22:16,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-04 02:22:16,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-04 02:22:16,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-04 02:22:16,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-04 02:22:16,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-04 02:22:16,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-04 02:22:16,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-04 02:22:16,442 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-04 02:22:16,511 INFO L256 CfgBuilder]: Building ICFG [2025-03-04 02:22:16,513 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-04 02:22:16,737 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-04 02:22:16,737 INFO L307 CfgBuilder]: Performing block encoding [2025-03-04 02:22:16,920 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-04 02:22:16,920 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-04 02:22:16,920 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 02:22:16 BoogieIcfgContainer [2025-03-04 02:22:16,921 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-04 02:22:16,923 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-04 02:22:16,923 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-04 02:22:16,926 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-04 02:22:16,927 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.03 02:22:16" (1/3) ... [2025-03-04 02:22:16,928 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@351b75c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 02:22:16, skipping insertion in model container [2025-03-04 02:22:16,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:22:16" (2/3) ... [2025-03-04 02:22:16,928 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@351b75c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 02:22:16, skipping insertion in model container [2025-03-04 02:22:16,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 02:22:16" (3/3) ... [2025-03-04 02:22:16,929 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2025-03-04 02:22:16,940 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-04 02:22:16,942 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-counter-queue2.wvr.c that has 3 procedures, 22 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-04 02:22:16,942 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-04 02:22:16,983 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-04 02:22:17,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions, 62 flow [2025-03-04 02:22:17,033 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2025-03-04 02:22:17,036 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-04 02:22:17,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 22 events. 3/22 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2025-03-04 02:22:17,041 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 24 transitions, 62 flow [2025-03-04 02:22:17,043 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 21 transitions, 54 flow [2025-03-04 02:22:17,048 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 02:22:17,055 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;@384eeb5c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 02:22:17,056 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-04 02:22:17,061 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-04 02:22:17,061 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2025-03-04 02:22:17,061 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-04 02:22:17,062 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:17,062 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:22:17,062 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:22:17,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:17,070 INFO L85 PathProgramCache]: Analyzing trace with hash -470529137, now seen corresponding path program 1 times [2025-03-04 02:22:17,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:17,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314024080] [2025-03-04 02:22:17,076 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:22:17,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:17,140 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-04 02:22:17,159 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-04 02:22:17,160 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:22:17,160 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:22:17,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:17,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314024080] [2025-03-04 02:22:17,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314024080] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:22:17,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:22:17,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 02:22:17,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931653156] [2025-03-04 02:22:17,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:22:17,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 02:22:17,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:17,284 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 02:22:17,285 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 02:22:17,286 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-04 02:22:17,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:17,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:17,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-04 02:22:17,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:17,375 INFO L124 PetriNetUnfolderBase]: 93/181 cut-off events. [2025-03-04 02:22:17,375 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2025-03-04 02:22:17,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 181 events. 93/181 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 579 event pairs, 22 based on Foata normal form. 1/177 useless extension candidates. Maximal degree in co-relation 315. Up to 113 conditions per place. [2025-03-04 02:22:17,378 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 25 selfloop transitions, 3 changer transitions 1/32 dead transitions. [2025-03-04 02:22:17,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 32 transitions, 143 flow [2025-03-04 02:22:17,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 02:22:17,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 02:22:17,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2025-03-04 02:22:17,386 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2025-03-04 02:22:17,387 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 54 flow. Second operand 3 states and 45 transitions. [2025-03-04 02:22:17,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 32 transitions, 143 flow [2025-03-04 02:22:17,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 32 transitions, 129 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-04 02:22:17,392 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 65 flow [2025-03-04 02:22:17,394 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2025-03-04 02:22:17,396 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, -1 predicate places. [2025-03-04 02:22:17,396 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 65 flow [2025-03-04 02:22:17,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:17,396 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:17,396 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:22:17,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-04 02:22:17,397 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:22:17,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:17,397 INFO L85 PathProgramCache]: Analyzing trace with hash 705641639, now seen corresponding path program 1 times [2025-03-04 02:22:17,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:17,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514981817] [2025-03-04 02:22:17,397 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:22:17,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:17,404 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-04 02:22:17,417 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-04 02:22:17,417 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:22:17,417 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:17,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:22:17,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:17,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514981817] [2025-03-04 02:22:17,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514981817] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:22:17,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:22:17,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 02:22:17,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070465011] [2025-03-04 02:22:17,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:22:17,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 02:22:17,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:17,543 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 02:22:17,543 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-04 02:22:17,550 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-04 02:22:17,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:17,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:17,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-04 02:22:17,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:17,665 INFO L124 PetriNetUnfolderBase]: 171/329 cut-off events. [2025-03-04 02:22:17,665 INFO L125 PetriNetUnfolderBase]: For 43/46 co-relation queries the response was YES. [2025-03-04 02:22:17,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 329 events. 171/329 cut-off events. For 43/46 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1320 event pairs, 111 based on Foata normal form. 0/303 useless extension candidates. Maximal degree in co-relation 257. Up to 209 conditions per place. [2025-03-04 02:22:17,669 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 40 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2025-03-04 02:22:17,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 47 transitions, 220 flow [2025-03-04 02:22:17,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 02:22:17,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-04 02:22:17,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2025-03-04 02:22:17,671 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2025-03-04 02:22:17,671 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 65 flow. Second operand 5 states and 62 transitions. [2025-03-04 02:22:17,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 47 transitions, 220 flow [2025-03-04 02:22:17,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 47 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 02:22:17,673 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 98 flow [2025-03-04 02:22:17,673 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2025-03-04 02:22:17,674 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2025-03-04 02:22:17,674 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 98 flow [2025-03-04 02:22:17,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:17,674 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:17,674 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:22:17,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-04 02:22:17,674 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:22:17,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:17,675 INFO L85 PathProgramCache]: Analyzing trace with hash 488299972, now seen corresponding path program 1 times [2025-03-04 02:22:17,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:17,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118517996] [2025-03-04 02:22:17,675 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:22:17,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:17,683 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-04 02:22:17,695 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-04 02:22:17,696 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:22:17,696 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:22:17,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:17,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118517996] [2025-03-04 02:22:17,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118517996] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:22:17,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:22:17,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 02:22:17,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672246718] [2025-03-04 02:22:17,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:22:17,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 02:22:17,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:17,811 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 02:22:17,811 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-04 02:22:17,815 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-04 02:22:17,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:17,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:17,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-04 02:22:17,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:17,909 INFO L124 PetriNetUnfolderBase]: 138/264 cut-off events. [2025-03-04 02:22:17,909 INFO L125 PetriNetUnfolderBase]: For 100/114 co-relation queries the response was YES. [2025-03-04 02:22:17,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 664 conditions, 264 events. 138/264 cut-off events. For 100/114 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 969 event pairs, 95 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 509. Up to 205 conditions per place. [2025-03-04 02:22:17,912 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 20 selfloop transitions, 2 changer transitions 15/39 dead transitions. [2025-03-04 02:22:17,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 39 transitions, 209 flow [2025-03-04 02:22:17,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 02:22:17,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-04 02:22:17,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 56 transitions. [2025-03-04 02:22:17,915 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2025-03-04 02:22:17,915 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 98 flow. Second operand 5 states and 56 transitions. [2025-03-04 02:22:17,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 39 transitions, 209 flow [2025-03-04 02:22:17,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 39 transitions, 205 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-04 02:22:17,917 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 86 flow [2025-03-04 02:22:17,917 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=86, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2025-03-04 02:22:17,919 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 10 predicate places. [2025-03-04 02:22:17,919 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 86 flow [2025-03-04 02:22:17,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:17,919 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:17,919 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:22:17,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-04 02:22:17,919 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:22:17,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:17,920 INFO L85 PathProgramCache]: Analyzing trace with hash -535062555, now seen corresponding path program 1 times [2025-03-04 02:22:17,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:17,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129301122] [2025-03-04 02:22:17,920 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:22:17,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:17,929 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-04 02:22:17,939 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-04 02:22:17,939 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:22:17,939 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:22:18,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:18,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129301122] [2025-03-04 02:22:18,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129301122] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:22:18,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285802277] [2025-03-04 02:22:18,014 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:22:18,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:18,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:22:18,017 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:22:18,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-04 02:22:18,065 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-04 02:22:18,080 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-04 02:22:18,080 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:22:18,080 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:18,082 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-04 02:22:18,085 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:22:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:22:18,136 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:22:18,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:22:18,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285802277] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-04 02:22:18,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-04 02:22:18,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2025-03-04 02:22:18,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919818713] [2025-03-04 02:22:18,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:22:18,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 02:22:18,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:18,186 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 02:22:18,186 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-03-04 02:22:18,194 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-04 02:22:18,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:18,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:18,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-04 02:22:18,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:18,261 INFO L124 PetriNetUnfolderBase]: 116/210 cut-off events. [2025-03-04 02:22:18,262 INFO L125 PetriNetUnfolderBase]: For 73/89 co-relation queries the response was YES. [2025-03-04 02:22:18,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 564 conditions, 210 events. 116/210 cut-off events. For 73/89 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 687 event pairs, 33 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 547. Up to 109 conditions per place. [2025-03-04 02:22:18,265 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 25 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2025-03-04 02:22:18,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 32 transitions, 173 flow [2025-03-04 02:22:18,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 02:22:18,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-04 02:22:18,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2025-03-04 02:22:18,267 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4 [2025-03-04 02:22:18,268 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 86 flow. Second operand 5 states and 48 transitions. [2025-03-04 02:22:18,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 32 transitions, 173 flow [2025-03-04 02:22:18,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 149 flow, removed 10 selfloop flow, removed 6 redundant places. [2025-03-04 02:22:18,270 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 91 flow [2025-03-04 02:22:18,270 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2025-03-04 02:22:18,270 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 6 predicate places. [2025-03-04 02:22:18,270 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 91 flow [2025-03-04 02:22:18,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:18,270 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:18,272 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:22:18,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-04 02:22:18,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:18,477 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:22:18,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:18,478 INFO L85 PathProgramCache]: Analyzing trace with hash -2019467290, now seen corresponding path program 1 times [2025-03-04 02:22:18,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:18,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654774435] [2025-03-04 02:22:18,478 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:22:18,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:18,483 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-04 02:22:18,488 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-04 02:22:18,489 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:22:18,489 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:18,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:22:18,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:18,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654774435] [2025-03-04 02:22:18,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654774435] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:22:18,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782133755] [2025-03-04 02:22:18,562 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:22:18,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:18,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:22:18,565 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:22:18,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-04 02:22:18,605 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-04 02:22:18,619 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-04 02:22:18,619 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:22:18,619 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:18,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-04 02:22:18,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:22:18,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:22:18,647 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:22:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:22:18,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782133755] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-04 02:22:18,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-04 02:22:18,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2025-03-04 02:22:18,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786537178] [2025-03-04 02:22:18,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:22:18,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 02:22:18,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:18,673 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 02:22:18,673 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-03-04 02:22:18,678 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-04 02:22:18,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:18,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:18,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-04 02:22:18,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:18,734 INFO L124 PetriNetUnfolderBase]: 117/219 cut-off events. [2025-03-04 02:22:18,734 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2025-03-04 02:22:18,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 219 events. 117/219 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 684 event pairs, 35 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 563. Up to 113 conditions per place. [2025-03-04 02:22:18,735 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 26 selfloop transitions, 5 changer transitions 0/34 dead transitions. [2025-03-04 02:22:18,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 34 transitions, 186 flow [2025-03-04 02:22:18,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 02:22:18,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-04 02:22:18,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 49 transitions. [2025-03-04 02:22:18,736 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2025-03-04 02:22:18,736 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 91 flow. Second operand 5 states and 49 transitions. [2025-03-04 02:22:18,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 34 transitions, 186 flow [2025-03-04 02:22:18,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 34 transitions, 178 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 02:22:18,741 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 108 flow [2025-03-04 02:22:18,741 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2025-03-04 02:22:18,742 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 9 predicate places. [2025-03-04 02:22:18,742 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 108 flow [2025-03-04 02:22:18,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:18,742 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:18,742 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:22:18,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-04 02:22:18,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:18,943 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:22:18,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:18,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1519152560, now seen corresponding path program 1 times [2025-03-04 02:22:18,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:18,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290022445] [2025-03-04 02:22:18,943 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:22:18,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:18,949 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-04 02:22:18,965 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-04 02:22:18,966 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:22:18,966 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:19,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:22:19,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:19,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290022445] [2025-03-04 02:22:19,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290022445] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:22:19,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:22:19,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-04 02:22:19,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26244191] [2025-03-04 02:22:19,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:22:19,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 02:22:19,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:19,274 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 02:22:19,274 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-03-04 02:22:19,297 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-04 02:22:19,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 108 flow. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:19,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:19,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-04 02:22:19,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:19,415 INFO L124 PetriNetUnfolderBase]: 128/254 cut-off events. [2025-03-04 02:22:19,416 INFO L125 PetriNetUnfolderBase]: For 189/189 co-relation queries the response was YES. [2025-03-04 02:22:19,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 751 conditions, 254 events. 128/254 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 858 event pairs, 29 based on Foata normal form. 1/252 useless extension candidates. Maximal degree in co-relation 727. Up to 157 conditions per place. [2025-03-04 02:22:19,417 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 30 selfloop transitions, 17 changer transitions 1/53 dead transitions. [2025-03-04 02:22:19,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 53 transitions, 311 flow [2025-03-04 02:22:19,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-04 02:22:19,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-04 02:22:19,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2025-03-04 02:22:19,419 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2025-03-04 02:22:19,419 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 108 flow. Second operand 7 states and 81 transitions. [2025-03-04 02:22:19,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 53 transitions, 311 flow [2025-03-04 02:22:19,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 53 transitions, 300 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 02:22:19,421 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 233 flow [2025-03-04 02:22:19,421 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=233, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2025-03-04 02:22:19,422 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 16 predicate places. [2025-03-04 02:22:19,422 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 233 flow [2025-03-04 02:22:19,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:19,422 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:19,422 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:22:19,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-04 02:22:19,422 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:22:19,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:19,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1525632578, now seen corresponding path program 2 times [2025-03-04 02:22:19,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:19,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370925850] [2025-03-04 02:22:19,424 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:22:19,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:19,434 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-04 02:22:19,448 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-04 02:22:19,448 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:22:19,448 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:19,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:22:19,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:19,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370925850] [2025-03-04 02:22:19,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370925850] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:22:19,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653967459] [2025-03-04 02:22:19,850 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:22:19,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:19,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:22:19,852 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:22:19,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-04 02:22:19,897 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-04 02:22:19,915 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-04 02:22:19,915 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:22:19,915 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:19,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-04 02:22:19,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:22:20,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:22:20,011 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:22:20,056 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 02:22:20,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 14 [2025-03-04 02:22:20,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:22:20,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653967459] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:22:20,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:22:20,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 13 [2025-03-04 02:22:20,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685480657] [2025-03-04 02:22:20,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:22:20,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-04 02:22:20,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:20,121 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-04 02:22:20,121 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2025-03-04 02:22:20,158 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-04 02:22:20,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 233 flow. Second operand has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:20,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:20,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-04 02:22:20,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:20,428 INFO L124 PetriNetUnfolderBase]: 167/331 cut-off events. [2025-03-04 02:22:20,428 INFO L125 PetriNetUnfolderBase]: For 516/520 co-relation queries the response was YES. [2025-03-04 02:22:20,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1175 conditions, 331 events. 167/331 cut-off events. For 516/520 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1281 event pairs, 28 based on Foata normal form. 5/332 useless extension candidates. Maximal degree in co-relation 1146. Up to 161 conditions per place. [2025-03-04 02:22:20,431 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 34 selfloop transitions, 34 changer transitions 1/74 dead transitions. [2025-03-04 02:22:20,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 74 transitions, 538 flow [2025-03-04 02:22:20,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 02:22:20,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 02:22:20,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2025-03-04 02:22:20,432 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45416666666666666 [2025-03-04 02:22:20,432 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 233 flow. Second operand 10 states and 109 transitions. [2025-03-04 02:22:20,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 74 transitions, 538 flow [2025-03-04 02:22:20,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 74 transitions, 516 flow, removed 10 selfloop flow, removed 1 redundant places. [2025-03-04 02:22:20,435 INFO L231 Difference]: Finished difference. Result has 50 places, 55 transitions, 414 flow [2025-03-04 02:22:20,435 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=414, PETRI_PLACES=50, PETRI_TRANSITIONS=55} [2025-03-04 02:22:20,435 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 25 predicate places. [2025-03-04 02:22:20,435 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 55 transitions, 414 flow [2025-03-04 02:22:20,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:20,436 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:20,436 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:22:20,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-04 02:22:20,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:20,640 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:22:20,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:20,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1806342762, now seen corresponding path program 3 times [2025-03-04 02:22:20,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:20,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764259775] [2025-03-04 02:22:20,641 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 02:22:20,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:20,648 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-03-04 02:22:20,659 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-04 02:22:20,659 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 02:22:20,659 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:20,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:22:20,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:20,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764259775] [2025-03-04 02:22:20,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764259775] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:22:20,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770294576] [2025-03-04 02:22:20,972 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 02:22:20,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:20,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:22:20,976 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:22:20,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-04 02:22:21,016 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-03-04 02:22:21,033 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-04 02:22:21,033 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 02:22:21,033 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:21,037 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-04 02:22:21,038 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:22:21,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:22:21,094 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:22:21,125 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 02:22:21,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2025-03-04 02:22:21,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:22:21,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770294576] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:22:21,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:22:21,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 13 [2025-03-04 02:22:21,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729339343] [2025-03-04 02:22:21,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:22:21,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-04 02:22:21,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:21,144 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-04 02:22:21,144 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2025-03-04 02:22:21,170 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-04 02:22:21,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 55 transitions, 414 flow. Second operand has 14 states, 14 states have (on average 7.357142857142857) internal successors, (103), 14 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) [2025-03-04 02:22:21,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:21,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-04 02:22:21,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:21,379 INFO L124 PetriNetUnfolderBase]: 224/460 cut-off events. [2025-03-04 02:22:21,379 INFO L125 PetriNetUnfolderBase]: For 978/978 co-relation queries the response was YES. [2025-03-04 02:22:21,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1748 conditions, 460 events. 224/460 cut-off events. For 978/978 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2103 event pairs, 34 based on Foata normal form. 1/460 useless extension candidates. Maximal degree in co-relation 1715. Up to 270 conditions per place. [2025-03-04 02:22:21,383 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 57 selfloop transitions, 29 changer transitions 1/92 dead transitions. [2025-03-04 02:22:21,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 92 transitions, 759 flow [2025-03-04 02:22:21,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 02:22:21,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 02:22:21,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2025-03-04 02:22:21,384 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4708333333333333 [2025-03-04 02:22:21,384 INFO L175 Difference]: Start difference. First operand has 50 places, 55 transitions, 414 flow. Second operand 10 states and 113 transitions. [2025-03-04 02:22:21,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 92 transitions, 759 flow [2025-03-04 02:22:21,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 92 transitions, 703 flow, removed 27 selfloop flow, removed 1 redundant places. [2025-03-04 02:22:21,389 INFO L231 Difference]: Finished difference. Result has 59 places, 67 transitions, 527 flow [2025-03-04 02:22:21,389 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=527, PETRI_PLACES=59, PETRI_TRANSITIONS=67} [2025-03-04 02:22:21,389 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 34 predicate places. [2025-03-04 02:22:21,390 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 67 transitions, 527 flow [2025-03-04 02:22:21,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.357142857142857) internal successors, (103), 14 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) [2025-03-04 02:22:21,390 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:21,390 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:22:21,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-04 02:22:21,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:21,591 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:22:21,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:21,591 INFO L85 PathProgramCache]: Analyzing trace with hash -712065166, now seen corresponding path program 4 times [2025-03-04 02:22:21,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:21,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893260312] [2025-03-04 02:22:21,592 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 02:22:21,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:21,597 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-04 02:22:21,610 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-04 02:22:21,611 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 02:22:21,611 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:21,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:22:21,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:21,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893260312] [2025-03-04 02:22:21,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893260312] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:22:21,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796351413] [2025-03-04 02:22:21,805 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 02:22:21,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:21,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:22:21,807 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:22:21,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-04 02:22:21,847 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-04 02:22:21,861 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-04 02:22:21,861 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 02:22:21,862 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:21,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-04 02:22:21,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:22:21,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:22:21,932 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:22:21,962 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 02:22:21,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 14 [2025-03-04 02:22:21,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:22:21,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796351413] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:22:21,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:22:21,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2025-03-04 02:22:21,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943570974] [2025-03-04 02:22:21,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:22:21,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-04 02:22:21,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:21,990 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-04 02:22:21,990 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-03-04 02:22:22,014 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-04 02:22:22,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 67 transitions, 527 flow. Second operand has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:22,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:22,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-04 02:22:22,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:22,159 INFO L124 PetriNetUnfolderBase]: 263/528 cut-off events. [2025-03-04 02:22:22,159 INFO L125 PetriNetUnfolderBase]: For 997/1003 co-relation queries the response was YES. [2025-03-04 02:22:22,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1992 conditions, 528 events. 263/528 cut-off events. For 997/1003 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2486 event pairs, 53 based on Foata normal form. 5/529 useless extension candidates. Maximal degree in co-relation 1955. Up to 381 conditions per place. [2025-03-04 02:22:22,163 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 66 selfloop transitions, 21 changer transitions 1/93 dead transitions. [2025-03-04 02:22:22,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 93 transitions, 820 flow [2025-03-04 02:22:22,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-04 02:22:22,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-04 02:22:22,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 91 transitions. [2025-03-04 02:22:22,164 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4739583333333333 [2025-03-04 02:22:22,164 INFO L175 Difference]: Start difference. First operand has 59 places, 67 transitions, 527 flow. Second operand 8 states and 91 transitions. [2025-03-04 02:22:22,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 93 transitions, 820 flow [2025-03-04 02:22:22,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 93 transitions, 804 flow, removed 6 selfloop flow, removed 2 redundant places. [2025-03-04 02:22:22,168 INFO L231 Difference]: Finished difference. Result has 67 places, 77 transitions, 650 flow [2025-03-04 02:22:22,168 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=650, PETRI_PLACES=67, PETRI_TRANSITIONS=77} [2025-03-04 02:22:22,168 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 42 predicate places. [2025-03-04 02:22:22,168 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 77 transitions, 650 flow [2025-03-04 02:22:22,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:22,169 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:22,169 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:22:22,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-04 02:22:22,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:22,373 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:22:22,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:22,374 INFO L85 PathProgramCache]: Analyzing trace with hash -123130484, now seen corresponding path program 5 times [2025-03-04 02:22:22,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:22,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507577187] [2025-03-04 02:22:22,374 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 02:22:22,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:22,379 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-04 02:22:22,390 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-04 02:22:22,390 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:22:22,390 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:22:22,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:22,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507577187] [2025-03-04 02:22:22,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507577187] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:22:22,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259054827] [2025-03-04 02:22:22,667 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 02:22:22,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:22,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:22:22,669 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:22:22,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-04 02:22:22,722 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-04 02:22:22,735 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-04 02:22:22,735 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:22:22,735 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:22,736 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-04 02:22:22,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:22:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:22:22,808 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:22:22,832 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 02:22:22,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 14 [2025-03-04 02:22:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:22:22,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259054827] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:22:22,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:22:22,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 15 [2025-03-04 02:22:22,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834334138] [2025-03-04 02:22:22,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:22:22,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-04 02:22:22,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:22,867 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-04 02:22:22,867 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2025-03-04 02:22:22,908 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-04 02:22:22,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 77 transitions, 650 flow. Second operand has 16 states, 16 states have (on average 7.375) internal successors, (118), 16 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:22,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:22,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-04 02:22:22,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:23,132 INFO L124 PetriNetUnfolderBase]: 297/601 cut-off events. [2025-03-04 02:22:23,132 INFO L125 PetriNetUnfolderBase]: For 1566/1570 co-relation queries the response was YES. [2025-03-04 02:22:23,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2429 conditions, 601 events. 297/601 cut-off events. For 1566/1570 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3001 event pairs, 58 based on Foata normal form. 5/602 useless extension candidates. Maximal degree in co-relation 2388. Up to 385 conditions per place. [2025-03-04 02:22:23,136 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 66 selfloop transitions, 36 changer transitions 1/108 dead transitions. [2025-03-04 02:22:23,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 108 transitions, 1027 flow [2025-03-04 02:22:23,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 02:22:23,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 02:22:23,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2025-03-04 02:22:23,137 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45 [2025-03-04 02:22:23,137 INFO L175 Difference]: Start difference. First operand has 67 places, 77 transitions, 650 flow. Second operand 10 states and 108 transitions. [2025-03-04 02:22:23,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 108 transitions, 1027 flow [2025-03-04 02:22:23,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 108 transitions, 1011 flow, removed 7 selfloop flow, removed 1 redundant places. [2025-03-04 02:22:23,142 INFO L231 Difference]: Finished difference. Result has 76 places, 90 transitions, 846 flow [2025-03-04 02:22:23,142 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=846, PETRI_PLACES=76, PETRI_TRANSITIONS=90} [2025-03-04 02:22:23,142 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 51 predicate places. [2025-03-04 02:22:23,142 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 90 transitions, 846 flow [2025-03-04 02:22:23,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.375) internal successors, (118), 16 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:23,143 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:23,143 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:22:23,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-04 02:22:23,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:23,344 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:22:23,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:23,344 INFO L85 PathProgramCache]: Analyzing trace with hash 764438140, now seen corresponding path program 6 times [2025-03-04 02:22:23,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:23,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454169819] [2025-03-04 02:22:23,345 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-04 02:22:23,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:23,349 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-03-04 02:22:23,354 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 20 of 21 statements. [2025-03-04 02:22:23,357 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-04 02:22:23,357 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:23,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:22:23,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:23,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454169819] [2025-03-04 02:22:23,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454169819] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:22:23,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:22:23,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-04 02:22:23,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018529504] [2025-03-04 02:22:23,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:22:23,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 02:22:23,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:23,511 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 02:22:23,511 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-03-04 02:22:23,532 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-04 02:22:23,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 90 transitions, 846 flow. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:23,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:23,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-04 02:22:23,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:23,761 INFO L124 PetriNetUnfolderBase]: 378/756 cut-off events. [2025-03-04 02:22:23,761 INFO L125 PetriNetUnfolderBase]: For 2601/2605 co-relation queries the response was YES. [2025-03-04 02:22:23,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3305 conditions, 756 events. 378/756 cut-off events. For 2601/2605 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3995 event pairs, 70 based on Foata normal form. 5/755 useless extension candidates. Maximal degree in co-relation 3260. Up to 499 conditions per place. [2025-03-04 02:22:23,767 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 78 selfloop transitions, 43 changer transitions 1/127 dead transitions. [2025-03-04 02:22:23,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 127 transitions, 1369 flow [2025-03-04 02:22:23,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-04 02:22:23,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-04 02:22:23,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2025-03-04 02:22:23,769 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4675925925925926 [2025-03-04 02:22:23,769 INFO L175 Difference]: Start difference. First operand has 76 places, 90 transitions, 846 flow. Second operand 9 states and 101 transitions. [2025-03-04 02:22:23,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 127 transitions, 1369 flow [2025-03-04 02:22:23,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 127 transitions, 1303 flow, removed 31 selfloop flow, removed 2 redundant places. [2025-03-04 02:22:23,777 INFO L231 Difference]: Finished difference. Result has 85 places, 110 transitions, 1155 flow [2025-03-04 02:22:23,778 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1155, PETRI_PLACES=85, PETRI_TRANSITIONS=110} [2025-03-04 02:22:23,778 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 60 predicate places. [2025-03-04 02:22:23,778 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 110 transitions, 1155 flow [2025-03-04 02:22:23,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:23,778 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:23,778 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:22:23,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-04 02:22:23,779 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:22:23,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:23,779 INFO L85 PathProgramCache]: Analyzing trace with hash 63945152, now seen corresponding path program 7 times [2025-03-04 02:22:23,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:23,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763624427] [2025-03-04 02:22:23,779 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-04 02:22:23,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:23,786 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-04 02:22:23,793 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-04 02:22:23,794 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:22:23,794 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:23,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:22:23,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:23,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763624427] [2025-03-04 02:22:23,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763624427] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:22:23,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871849090] [2025-03-04 02:22:23,991 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-04 02:22:23,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:23,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:22:23,993 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:22:23,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-04 02:22:24,029 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-04 02:22:24,042 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-04 02:22:24,042 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:22:24,042 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:24,043 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-04 02:22:24,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:22:24,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:22:24,106 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 02:22:24,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871849090] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:22:24,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-04 02:22:24,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2025-03-04 02:22:24,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635331268] [2025-03-04 02:22:24,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:22:24,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 02:22:24,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:24,107 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 02:22:24,107 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2025-03-04 02:22:24,110 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-04 02:22:24,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 110 transitions, 1155 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:24,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:24,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-04 02:22:24,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:24,253 INFO L124 PetriNetUnfolderBase]: 410/819 cut-off events. [2025-03-04 02:22:24,253 INFO L125 PetriNetUnfolderBase]: For 3333/3337 co-relation queries the response was YES. [2025-03-04 02:22:24,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3651 conditions, 819 events. 410/819 cut-off events. For 3333/3337 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4395 event pairs, 83 based on Foata normal form. 1/819 useless extension candidates. Maximal degree in co-relation 3602. Up to 573 conditions per place. [2025-03-04 02:22:24,261 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 96 selfloop transitions, 27 changer transitions 1/129 dead transitions. [2025-03-04 02:22:24,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 129 transitions, 1512 flow [2025-03-04 02:22:24,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 02:22:24,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-04 02:22:24,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 77 transitions. [2025-03-04 02:22:24,263 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5347222222222222 [2025-03-04 02:22:24,263 INFO L175 Difference]: Start difference. First operand has 85 places, 110 transitions, 1155 flow. Second operand 6 states and 77 transitions. [2025-03-04 02:22:24,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 129 transitions, 1512 flow [2025-03-04 02:22:24,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 129 transitions, 1496 flow, removed 7 selfloop flow, removed 1 redundant places. [2025-03-04 02:22:24,306 INFO L231 Difference]: Finished difference. Result has 91 places, 116 transitions, 1286 flow [2025-03-04 02:22:24,307 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1286, PETRI_PLACES=91, PETRI_TRANSITIONS=116} [2025-03-04 02:22:24,308 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 66 predicate places. [2025-03-04 02:22:24,310 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 116 transitions, 1286 flow [2025-03-04 02:22:24,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:24,310 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:24,310 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:22:24,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-04 02:22:24,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:24,511 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:22:24,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:24,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1392774386, now seen corresponding path program 8 times [2025-03-04 02:22:24,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:24,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160028194] [2025-03-04 02:22:24,512 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:22:24,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:24,516 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-04 02:22:24,522 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-04 02:22:24,522 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:22:24,522 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:24,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:22:24,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:24,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160028194] [2025-03-04 02:22:24,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160028194] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:22:24,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370101311] [2025-03-04 02:22:24,576 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:22:24,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:24,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:22:24,578 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:22:24,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-04 02:22:24,620 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-04 02:22:24,636 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-04 02:22:24,637 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:22:24,637 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:24,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-04 02:22:24,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:22:24,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:22:24,686 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:22:24,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:22:24,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370101311] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:22:24,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:22:24,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-04 02:22:24,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204531344] [2025-03-04 02:22:24,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:22:24,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-04 02:22:24,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:24,731 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-04 02:22:24,731 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2025-03-04 02:22:24,746 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-04 02:22:24,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 116 transitions, 1286 flow. Second operand has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:24,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:24,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-04 02:22:24,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:24,989 INFO L124 PetriNetUnfolderBase]: 916/1776 cut-off events. [2025-03-04 02:22:24,989 INFO L125 PetriNetUnfolderBase]: For 8093/8096 co-relation queries the response was YES. [2025-03-04 02:22:24,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8038 conditions, 1776 events. 916/1776 cut-off events. For 8093/8096 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 11064 event pairs, 409 based on Foata normal form. 64/1838 useless extension candidates. Maximal degree in co-relation 6960. Up to 935 conditions per place. [2025-03-04 02:22:25,004 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 207 selfloop transitions, 27 changer transitions 0/237 dead transitions. [2025-03-04 02:22:25,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 237 transitions, 3070 flow [2025-03-04 02:22:25,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-04 02:22:25,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-04 02:22:25,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2025-03-04 02:22:25,005 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2025-03-04 02:22:25,005 INFO L175 Difference]: Start difference. First operand has 91 places, 116 transitions, 1286 flow. Second operand 7 states and 81 transitions. [2025-03-04 02:22:25,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 237 transitions, 3070 flow [2025-03-04 02:22:25,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 237 transitions, 3034 flow, removed 18 selfloop flow, removed 0 redundant places. [2025-03-04 02:22:25,025 INFO L231 Difference]: Finished difference. Result has 101 places, 141 transitions, 1743 flow [2025-03-04 02:22:25,025 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1268, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1743, PETRI_PLACES=101, PETRI_TRANSITIONS=141} [2025-03-04 02:22:25,026 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 76 predicate places. [2025-03-04 02:22:25,026 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 141 transitions, 1743 flow [2025-03-04 02:22:25,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:25,026 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:25,026 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:22:25,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-04 02:22:25,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-04 02:22:25,227 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:22:25,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:25,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1117359341, now seen corresponding path program 9 times [2025-03-04 02:22:25,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:25,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774451351] [2025-03-04 02:22:25,228 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 02:22:25,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:25,233 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 2 equivalence classes. [2025-03-04 02:22:25,237 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-04 02:22:25,237 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 02:22:25,237 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:22:25,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:25,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774451351] [2025-03-04 02:22:25,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774451351] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:22:25,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738563676] [2025-03-04 02:22:25,308 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 02:22:25,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:25,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:22:25,310 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:22:25,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-04 02:22:25,346 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 2 equivalence classes. [2025-03-04 02:22:25,361 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-04 02:22:25,361 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 02:22:25,361 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:25,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-04 02:22:25,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:22:25,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:22:25,428 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:22:25,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:22:25,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738563676] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:22:25,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:22:25,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-04 02:22:25,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561689757] [2025-03-04 02:22:25,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:22:25,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-04 02:22:25,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:25,481 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-04 02:22:25,481 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-03-04 02:22:25,497 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-04 02:22:25,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 141 transitions, 1743 flow. Second operand has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 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) [2025-03-04 02:22:25,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:25,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-04 02:22:25,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:25,733 INFO L124 PetriNetUnfolderBase]: 796/1549 cut-off events. [2025-03-04 02:22:25,733 INFO L125 PetriNetUnfolderBase]: For 8619/8655 co-relation queries the response was YES. [2025-03-04 02:22:25,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7515 conditions, 1549 events. 796/1549 cut-off events. For 8619/8655 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 9419 event pairs, 390 based on Foata normal form. 71/1619 useless extension candidates. Maximal degree in co-relation 6264. Up to 966 conditions per place. [2025-03-04 02:22:25,742 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 111 selfloop transitions, 3 changer transitions 85/202 dead transitions. [2025-03-04 02:22:25,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 202 transitions, 2814 flow [2025-03-04 02:22:25,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-04 02:22:25,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-04 02:22:25,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2025-03-04 02:22:25,743 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2025-03-04 02:22:25,744 INFO L175 Difference]: Start difference. First operand has 101 places, 141 transitions, 1743 flow. Second operand 7 states and 78 transitions. [2025-03-04 02:22:25,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 202 transitions, 2814 flow [2025-03-04 02:22:25,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 202 transitions, 2798 flow, removed 6 selfloop flow, removed 2 redundant places. [2025-03-04 02:22:25,764 INFO L231 Difference]: Finished difference. Result has 108 places, 117 transitions, 1370 flow [2025-03-04 02:22:25,765 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1716, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1370, PETRI_PLACES=108, PETRI_TRANSITIONS=117} [2025-03-04 02:22:25,766 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 83 predicate places. [2025-03-04 02:22:25,766 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 117 transitions, 1370 flow [2025-03-04 02:22:25,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 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) [2025-03-04 02:22:25,766 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:25,766 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:22:25,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-04 02:22:25,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-04 02:22:25,967 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:22:25,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:25,968 INFO L85 PathProgramCache]: Analyzing trace with hash 584211404, now seen corresponding path program 10 times [2025-03-04 02:22:25,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:25,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237905956] [2025-03-04 02:22:25,968 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 02:22:25,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:25,973 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-03-04 02:22:25,975 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 19 of 25 statements. [2025-03-04 02:22:25,975 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-04 02:22:25,975 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:26,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:22:26,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:26,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237905956] [2025-03-04 02:22:26,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237905956] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:22:26,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344154020] [2025-03-04 02:22:26,002 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 02:22:26,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:26,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:22:26,005 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:22:26,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-04 02:22:26,047 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-03-04 02:22:26,054 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 19 of 25 statements. [2025-03-04 02:22:26,054 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-04 02:22:26,054 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:26,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-04 02:22:26,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:22:26,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:22:26,088 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:22:26,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:22:26,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344154020] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:22:26,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:22:26,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2025-03-04 02:22:26,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355532994] [2025-03-04 02:22:26,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:22:26,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-04 02:22:26,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:26,124 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-04 02:22:26,124 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2025-03-04 02:22:26,134 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-04 02:22:26,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 117 transitions, 1370 flow. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:26,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:26,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-04 02:22:26,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:26,478 INFO L124 PetriNetUnfolderBase]: 894/1533 cut-off events. [2025-03-04 02:22:26,478 INFO L125 PetriNetUnfolderBase]: For 7602/7602 co-relation queries the response was YES. [2025-03-04 02:22:26,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7544 conditions, 1533 events. 894/1533 cut-off events. For 7602/7602 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7822 event pairs, 63 based on Foata normal form. 11/1544 useless extension candidates. Maximal degree in co-relation 7490. Up to 418 conditions per place. [2025-03-04 02:22:26,487 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 178 selfloop transitions, 87 changer transitions 0/266 dead transitions. [2025-03-04 02:22:26,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 266 transitions, 3275 flow [2025-03-04 02:22:26,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-04 02:22:26,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-04 02:22:26,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 150 transitions. [2025-03-04 02:22:26,490 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2025-03-04 02:22:26,490 INFO L175 Difference]: Start difference. First operand has 108 places, 117 transitions, 1370 flow. Second operand 15 states and 150 transitions. [2025-03-04 02:22:26,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 266 transitions, 3275 flow [2025-03-04 02:22:26,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 266 transitions, 3069 flow, removed 100 selfloop flow, removed 9 redundant places. [2025-03-04 02:22:26,508 INFO L231 Difference]: Finished difference. Result has 114 places, 169 transitions, 2077 flow [2025-03-04 02:22:26,508 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1276, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2077, PETRI_PLACES=114, PETRI_TRANSITIONS=169} [2025-03-04 02:22:26,509 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 89 predicate places. [2025-03-04 02:22:26,509 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 169 transitions, 2077 flow [2025-03-04 02:22:26,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:26,509 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:26,509 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:22:26,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-04 02:22:26,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-04 02:22:26,710 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:22:26,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:26,710 INFO L85 PathProgramCache]: Analyzing trace with hash -619168809, now seen corresponding path program 11 times [2025-03-04 02:22:26,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:26,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934490162] [2025-03-04 02:22:26,711 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 02:22:26,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:26,716 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 25 statements into 3 equivalence classes. [2025-03-04 02:22:26,722 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 25 of 25 statements. [2025-03-04 02:22:26,723 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-04 02:22:26,723 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:26,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:22:26,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:26,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934490162] [2025-03-04 02:22:26,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934490162] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:22:26,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288646985] [2025-03-04 02:22:26,759 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 02:22:26,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:26,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:22:26,761 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:22:26,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-04 02:22:26,803 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 25 statements into 3 equivalence classes. [2025-03-04 02:22:26,818 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 25 of 25 statements. [2025-03-04 02:22:26,818 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-04 02:22:26,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:26,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-04 02:22:26,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:22:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:22:26,860 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:22:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:22:26,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288646985] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:22:26,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:22:26,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2025-03-04 02:22:26,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443429017] [2025-03-04 02:22:26,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:22:26,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 02:22:26,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:26,893 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 02:22:26,893 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-03-04 02:22:26,901 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-04 02:22:26,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 169 transitions, 2077 flow. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:26,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:26,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-04 02:22:26,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:27,173 INFO L124 PetriNetUnfolderBase]: 1109/1893 cut-off events. [2025-03-04 02:22:27,174 INFO L125 PetriNetUnfolderBase]: For 9994/9994 co-relation queries the response was YES. [2025-03-04 02:22:27,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10120 conditions, 1893 events. 1109/1893 cut-off events. For 9994/9994 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 10041 event pairs, 211 based on Foata normal form. 12/1905 useless extension candidates. Maximal degree in co-relation 10054. Up to 643 conditions per place. [2025-03-04 02:22:27,187 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 197 selfloop transitions, 59 changer transitions 5/262 dead transitions. [2025-03-04 02:22:27,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 262 transitions, 3499 flow [2025-03-04 02:22:27,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-04 02:22:27,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-04 02:22:27,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 94 transitions. [2025-03-04 02:22:27,188 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2025-03-04 02:22:27,189 INFO L175 Difference]: Start difference. First operand has 114 places, 169 transitions, 2077 flow. Second operand 8 states and 94 transitions. [2025-03-04 02:22:27,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 262 transitions, 3499 flow [2025-03-04 02:22:27,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 262 transitions, 3481 flow, removed 9 selfloop flow, removed 0 redundant places. [2025-03-04 02:22:27,216 INFO L231 Difference]: Finished difference. Result has 124 places, 189 transitions, 2477 flow [2025-03-04 02:22:27,216 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2065, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2477, PETRI_PLACES=124, PETRI_TRANSITIONS=189} [2025-03-04 02:22:27,217 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 99 predicate places. [2025-03-04 02:22:27,217 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 189 transitions, 2477 flow [2025-03-04 02:22:27,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:27,217 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:27,217 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:22:27,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-04 02:22:27,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-04 02:22:27,418 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:22:27,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:27,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1588584597, now seen corresponding path program 12 times [2025-03-04 02:22:27,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:27,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045200293] [2025-03-04 02:22:27,419 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-04 02:22:27,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:27,423 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 25 statements into 2 equivalence classes. [2025-03-04 02:22:27,436 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-04 02:22:27,436 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-04 02:22:27,436 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:22:27,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:27,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045200293] [2025-03-04 02:22:27,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045200293] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:22:27,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955282270] [2025-03-04 02:22:27,497 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-04 02:22:27,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:27,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:22:27,499 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:22:27,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-04 02:22:27,541 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 25 statements into 2 equivalence classes. [2025-03-04 02:22:27,559 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-04 02:22:27,559 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-04 02:22:27,559 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:27,561 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-04 02:22:27,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:22:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:22:27,612 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:22:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:22:27,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955282270] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:22:27,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:22:27,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-04 02:22:27,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906122646] [2025-03-04 02:22:27,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:22:27,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-04 02:22:27,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:27,657 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-04 02:22:27,658 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-03-04 02:22:27,672 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-04 02:22:27,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 189 transitions, 2477 flow. Second operand has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:27,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:27,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-04 02:22:27,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:27,900 INFO L124 PetriNetUnfolderBase]: 755/1331 cut-off events. [2025-03-04 02:22:27,901 INFO L125 PetriNetUnfolderBase]: For 10222/10240 co-relation queries the response was YES. [2025-03-04 02:22:27,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7889 conditions, 1331 events. 755/1331 cut-off events. For 10222/10240 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 6955 event pairs, 78 based on Foata normal form. 106/1433 useless extension candidates. Maximal degree in co-relation 7819. Up to 572 conditions per place. [2025-03-04 02:22:27,915 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 134 selfloop transitions, 51 changer transitions 0/200 dead transitions. [2025-03-04 02:22:27,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 200 transitions, 2910 flow [2025-03-04 02:22:27,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-04 02:22:27,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-04 02:22:27,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 85 transitions. [2025-03-04 02:22:27,917 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39351851851851855 [2025-03-04 02:22:27,917 INFO L175 Difference]: Start difference. First operand has 124 places, 189 transitions, 2477 flow. Second operand 9 states and 85 transitions. [2025-03-04 02:22:27,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 200 transitions, 2910 flow [2025-03-04 02:22:27,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 200 transitions, 2718 flow, removed 26 selfloop flow, removed 10 redundant places. [2025-03-04 02:22:27,948 INFO L231 Difference]: Finished difference. Result has 120 places, 177 transitions, 2247 flow [2025-03-04 02:22:27,949 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2145, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2247, PETRI_PLACES=120, PETRI_TRANSITIONS=177} [2025-03-04 02:22:27,949 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 95 predicate places. [2025-03-04 02:22:27,949 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 177 transitions, 2247 flow [2025-03-04 02:22:27,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:27,950 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:27,950 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:22:27,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-04 02:22:28,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-04 02:22:28,154 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:22:28,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:28,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1736493832, now seen corresponding path program 13 times [2025-03-04 02:22:28,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:28,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757650382] [2025-03-04 02:22:28,154 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-04 02:22:28,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:28,159 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-04 02:22:28,163 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-04 02:22:28,163 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:22:28,163 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:28,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-04 02:22:28,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:28,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757650382] [2025-03-04 02:22:28,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757650382] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:22:28,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970082383] [2025-03-04 02:22:28,213 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-04 02:22:28,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:28,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:22:28,215 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:22:28,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-04 02:22:28,254 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-04 02:22:28,268 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-04 02:22:28,268 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:22:28,268 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:28,269 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-04 02:22:28,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:22:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-04 02:22:28,329 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:22:28,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-04 02:22:28,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970082383] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:22:28,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:22:28,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-04 02:22:28,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141196755] [2025-03-04 02:22:28,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:22:28,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-04 02:22:28,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:28,387 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-04 02:22:28,387 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-03-04 02:22:28,405 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-04 02:22:28,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 177 transitions, 2247 flow. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:28,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:28,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-04 02:22:28,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:28,640 INFO L124 PetriNetUnfolderBase]: 735/1281 cut-off events. [2025-03-04 02:22:28,640 INFO L125 PetriNetUnfolderBase]: For 8854/8860 co-relation queries the response was YES. [2025-03-04 02:22:28,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7549 conditions, 1281 events. 735/1281 cut-off events. For 8854/8860 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6234 event pairs, 76 based on Foata normal form. 63/1343 useless extension candidates. Maximal degree in co-relation 7484. Up to 549 conditions per place. [2025-03-04 02:22:28,648 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 161 selfloop transitions, 52 changer transitions 0/218 dead transitions. [2025-03-04 02:22:28,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 218 transitions, 3125 flow [2025-03-04 02:22:28,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-04 02:22:28,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-04 02:22:28,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 82 transitions. [2025-03-04 02:22:28,650 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37962962962962965 [2025-03-04 02:22:28,650 INFO L175 Difference]: Start difference. First operand has 120 places, 177 transitions, 2247 flow. Second operand 9 states and 82 transitions. [2025-03-04 02:22:28,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 218 transitions, 3125 flow [2025-03-04 02:22:28,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 218 transitions, 2904 flow, removed 3 selfloop flow, removed 9 redundant places. [2025-03-04 02:22:28,667 INFO L231 Difference]: Finished difference. Result has 121 places, 188 transitions, 2335 flow [2025-03-04 02:22:28,667 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2000, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2335, PETRI_PLACES=121, PETRI_TRANSITIONS=188} [2025-03-04 02:22:28,667 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 96 predicate places. [2025-03-04 02:22:28,668 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 188 transitions, 2335 flow [2025-03-04 02:22:28,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:28,668 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:28,668 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:22:28,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-04 02:22:28,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-04 02:22:28,869 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:22:28,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:28,870 INFO L85 PathProgramCache]: Analyzing trace with hash -410925041, now seen corresponding path program 14 times [2025-03-04 02:22:28,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:28,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492477762] [2025-03-04 02:22:28,870 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:22:28,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:28,875 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-04 02:22:28,892 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 02:22:28,893 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:22:28,893 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:29,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:22:29,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:29,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492477762] [2025-03-04 02:22:29,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492477762] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:22:29,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278883132] [2025-03-04 02:22:29,341 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:22:29,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:29,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:22:29,344 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:22:29,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-04 02:22:29,384 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-04 02:22:29,400 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 02:22:29,400 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:22:29,400 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:29,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-03-04 02:22:29,402 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:22:29,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 02:22:29,609 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:22:29,746 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 02:22:29,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2025-03-04 02:22:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:22:29,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278883132] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:22:29,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:22:29,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 32 [2025-03-04 02:22:29,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053513571] [2025-03-04 02:22:29,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:22:29,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-04 02:22:29,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:29,811 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-04 02:22:29,811 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2025-03-04 02:22:29,921 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-04 02:22:29,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 188 transitions, 2335 flow. Second operand has 33 states, 33 states have (on average 5.9393939393939394) internal successors, (196), 33 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:29,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:29,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-04 02:22:29,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:31,179 INFO L124 PetriNetUnfolderBase]: 1042/1861 cut-off events. [2025-03-04 02:22:31,179 INFO L125 PetriNetUnfolderBase]: For 12273/12283 co-relation queries the response was YES. [2025-03-04 02:22:31,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10570 conditions, 1861 events. 1042/1861 cut-off events. For 12273/12283 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10074 event pairs, 16 based on Foata normal form. 11/1865 useless extension candidates. Maximal degree in co-relation 10505. Up to 852 conditions per place. [2025-03-04 02:22:31,196 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 182 selfloop transitions, 137 changer transitions 1/340 dead transitions. [2025-03-04 02:22:31,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 340 transitions, 4313 flow [2025-03-04 02:22:31,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-04 02:22:31,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-03-04 02:22:31,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 245 transitions. [2025-03-04 02:22:31,198 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2025-03-04 02:22:31,198 INFO L175 Difference]: Start difference. First operand has 121 places, 188 transitions, 2335 flow. Second operand 25 states and 245 transitions. [2025-03-04 02:22:31,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 340 transitions, 4313 flow [2025-03-04 02:22:31,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 340 transitions, 4270 flow, removed 9 selfloop flow, removed 6 redundant places. [2025-03-04 02:22:31,229 INFO L231 Difference]: Finished difference. Result has 148 places, 243 transitions, 3391 flow [2025-03-04 02:22:31,229 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2316, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3391, PETRI_PLACES=148, PETRI_TRANSITIONS=243} [2025-03-04 02:22:31,230 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 123 predicate places. [2025-03-04 02:22:31,230 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 243 transitions, 3391 flow [2025-03-04 02:22:31,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.9393939393939394) internal successors, (196), 33 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:31,231 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:31,231 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:22:31,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-04 02:22:31,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:31,432 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:22:31,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:31,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1293084655, now seen corresponding path program 15 times [2025-03-04 02:22:31,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:31,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821099584] [2025-03-04 02:22:31,432 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 02:22:31,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:31,437 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 2 equivalence classes. [2025-03-04 02:22:31,450 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 02:22:31,450 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 02:22:31,450 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:31,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:22:31,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:31,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821099584] [2025-03-04 02:22:31,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821099584] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:22:31,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541825340] [2025-03-04 02:22:31,876 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 02:22:31,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:31,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:22:31,878 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:22:31,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-04 02:22:31,926 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 2 equivalence classes. [2025-03-04 02:22:31,943 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 02:22:31,943 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 02:22:31,943 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:31,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-04 02:22:31,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:22:31,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-04 02:22:32,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:22:32,248 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:22:32,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2025-03-04 02:22:32,714 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 02:22:32,714 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 68 treesize of output 56 [2025-03-04 02:22:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:22:32,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541825340] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:22:32,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:22:32,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 39 [2025-03-04 02:22:32,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890435360] [2025-03-04 02:22:32,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:22:32,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-03-04 02:22:32,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:32,805 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-03-04 02:22:32,806 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1369, Unknown=0, NotChecked=0, Total=1560 [2025-03-04 02:22:32,838 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-04 02:22:32,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 243 transitions, 3391 flow. Second operand has 40 states, 40 states have (on average 4.65) internal successors, (186), 40 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:32,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:32,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-04 02:22:32,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:34,444 INFO L124 PetriNetUnfolderBase]: 1796/3031 cut-off events. [2025-03-04 02:22:34,444 INFO L125 PetriNetUnfolderBase]: For 24204/24204 co-relation queries the response was YES. [2025-03-04 02:22:34,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18957 conditions, 3031 events. 1796/3031 cut-off events. For 24204/24204 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 16726 event pairs, 37 based on Foata normal form. 1/3032 useless extension candidates. Maximal degree in co-relation 18884. Up to 1524 conditions per place. [2025-03-04 02:22:34,464 INFO L140 encePairwiseOnDemand]: 9/24 looper letters, 215 selfloop transitions, 314 changer transitions 2/532 dead transitions. [2025-03-04 02:22:34,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 532 transitions, 7553 flow [2025-03-04 02:22:34,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-04 02:22:34,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2025-03-04 02:22:34,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 301 transitions. [2025-03-04 02:22:34,466 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34837962962962965 [2025-03-04 02:22:34,466 INFO L175 Difference]: Start difference. First operand has 148 places, 243 transitions, 3391 flow. Second operand 36 states and 301 transitions. [2025-03-04 02:22:34,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 532 transitions, 7553 flow [2025-03-04 02:22:34,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 532 transitions, 7169 flow, removed 167 selfloop flow, removed 8 redundant places. [2025-03-04 02:22:34,519 INFO L231 Difference]: Finished difference. Result has 189 places, 428 transitions, 6761 flow [2025-03-04 02:22:34,519 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=3204, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=6761, PETRI_PLACES=189, PETRI_TRANSITIONS=428} [2025-03-04 02:22:34,519 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 164 predicate places. [2025-03-04 02:22:34,519 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 428 transitions, 6761 flow [2025-03-04 02:22:34,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.65) internal successors, (186), 40 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:34,520 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:34,520 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:22:34,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-04 02:22:34,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:34,724 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:22:34,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:34,725 INFO L85 PathProgramCache]: Analyzing trace with hash 583432593, now seen corresponding path program 16 times [2025-03-04 02:22:34,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:34,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072705230] [2025-03-04 02:22:34,725 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 02:22:34,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:34,729 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-04 02:22:34,736 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 02:22:34,736 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 02:22:34,736 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:35,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:22:35,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:35,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072705230] [2025-03-04 02:22:35,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072705230] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:22:35,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215799662] [2025-03-04 02:22:35,165 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 02:22:35,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:35,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:22:35,167 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:22:35,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-04 02:22:35,208 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-04 02:22:35,224 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 02:22:35,224 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 02:22:35,224 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:35,225 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-04 02:22:35,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:22:35,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:22:35,370 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:22:35,524 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 02:22:35,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2025-03-04 02:22:35,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:22:35,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215799662] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:22:35,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:22:35,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 27 [2025-03-04 02:22:35,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403282983] [2025-03-04 02:22:35,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:22:35,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-04 02:22:35,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:35,564 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-04 02:22:35,564 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2025-03-04 02:22:35,706 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-04 02:22:35,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 428 transitions, 6761 flow. Second operand has 28 states, 28 states have (on average 5.785714285714286) internal successors, (162), 28 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:35,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:35,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-04 02:22:35,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:37,492 INFO L124 PetriNetUnfolderBase]: 3333/5749 cut-off events. [2025-03-04 02:22:37,493 INFO L125 PetriNetUnfolderBase]: For 65104/65346 co-relation queries the response was YES. [2025-03-04 02:22:37,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42498 conditions, 5749 events. 3333/5749 cut-off events. For 65104/65346 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 36960 event pairs, 55 based on Foata normal form. 51/5739 useless extension candidates. Maximal degree in co-relation 42053. Up to 2779 conditions per place. [2025-03-04 02:22:37,609 INFO L140 encePairwiseOnDemand]: 12/24 looper letters, 549 selfloop transitions, 387 changer transitions 1/979 dead transitions. [2025-03-04 02:22:37,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 979 transitions, 16562 flow [2025-03-04 02:22:37,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-03-04 02:22:37,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2025-03-04 02:22:37,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 406 transitions. [2025-03-04 02:22:37,617 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41260162601626016 [2025-03-04 02:22:37,618 INFO L175 Difference]: Start difference. First operand has 189 places, 428 transitions, 6761 flow. Second operand 41 states and 406 transitions. [2025-03-04 02:22:37,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 979 transitions, 16562 flow [2025-03-04 02:22:37,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 979 transitions, 15679 flow, removed 371 selfloop flow, removed 11 redundant places. [2025-03-04 02:22:37,868 INFO L231 Difference]: Finished difference. Result has 232 places, 795 transitions, 13255 flow [2025-03-04 02:22:37,868 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=6426, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=13255, PETRI_PLACES=232, PETRI_TRANSITIONS=795} [2025-03-04 02:22:37,868 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 207 predicate places. [2025-03-04 02:22:37,868 INFO L471 AbstractCegarLoop]: Abstraction has has 232 places, 795 transitions, 13255 flow [2025-03-04 02:22:37,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.785714285714286) internal successors, (162), 28 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:37,869 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:37,869 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:22:37,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-04 02:22:38,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:38,069 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:22:38,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:38,070 INFO L85 PathProgramCache]: Analyzing trace with hash 395697771, now seen corresponding path program 17 times [2025-03-04 02:22:38,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:38,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072033025] [2025-03-04 02:22:38,070 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 02:22:38,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:38,075 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-04 02:22:38,084 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 02:22:38,085 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:22:38,085 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:22:38,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:38,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072033025] [2025-03-04 02:22:38,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072033025] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:22:38,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938133611] [2025-03-04 02:22:38,562 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 02:22:38,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:38,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:22:38,564 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:22:38,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-04 02:22:38,602 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-04 02:22:38,614 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 02:22:38,615 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:22:38,615 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:38,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-04 02:22:38,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:22:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:22:38,734 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:22:38,845 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 02:22:38,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2025-03-04 02:22:38,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:22:38,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938133611] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:22:38,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:22:38,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 27 [2025-03-04 02:22:38,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319622626] [2025-03-04 02:22:38,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:22:38,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-04 02:22:38,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:38,885 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-04 02:22:38,885 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2025-03-04 02:22:38,953 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-04 02:22:38,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 795 transitions, 13255 flow. Second operand has 28 states, 28 states have (on average 5.142857142857143) internal successors, (144), 28 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:38,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:38,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-04 02:22:38,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:40,893 INFO L124 PetriNetUnfolderBase]: 4123/6849 cut-off events. [2025-03-04 02:22:40,893 INFO L125 PetriNetUnfolderBase]: For 82067/82067 co-relation queries the response was YES. [2025-03-04 02:22:40,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53038 conditions, 6849 events. 4123/6849 cut-off events. For 82067/82067 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 42721 event pairs, 137 based on Foata normal form. 1/6850 useless extension candidates. Maximal degree in co-relation 52647. Up to 4341 conditions per place. [2025-03-04 02:22:40,947 INFO L140 encePairwiseOnDemand]: 12/24 looper letters, 558 selfloop transitions, 450 changer transitions 1/1010 dead transitions. [2025-03-04 02:22:40,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 1010 transitions, 18216 flow [2025-03-04 02:22:40,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-04 02:22:40,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-03-04 02:22:40,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 218 transitions. [2025-03-04 02:22:40,949 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36333333333333334 [2025-03-04 02:22:40,949 INFO L175 Difference]: Start difference. First operand has 232 places, 795 transitions, 13255 flow. Second operand 25 states and 218 transitions. [2025-03-04 02:22:40,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 1010 transitions, 18216 flow [2025-03-04 02:22:41,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 1010 transitions, 17186 flow, removed 488 selfloop flow, removed 5 redundant places. [2025-03-04 02:22:41,455 INFO L231 Difference]: Finished difference. Result has 260 places, 880 transitions, 15441 flow [2025-03-04 02:22:41,455 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=12239, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=380, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=15441, PETRI_PLACES=260, PETRI_TRANSITIONS=880} [2025-03-04 02:22:41,456 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 235 predicate places. [2025-03-04 02:22:41,456 INFO L471 AbstractCegarLoop]: Abstraction has has 260 places, 880 transitions, 15441 flow [2025-03-04 02:22:41,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.142857142857143) internal successors, (144), 28 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:41,456 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:41,456 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:22:41,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-04 02:22:41,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:41,657 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:22:41,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:41,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1528996037, now seen corresponding path program 18 times [2025-03-04 02:22:41,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:41,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216453770] [2025-03-04 02:22:41,657 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-04 02:22:41,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:41,661 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 2 equivalence classes. [2025-03-04 02:22:41,672 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 02:22:41,672 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-04 02:22:41,672 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:22:42,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:42,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216453770] [2025-03-04 02:22:42,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216453770] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:22:42,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731790966] [2025-03-04 02:22:42,118 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-04 02:22:42,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:42,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:22:42,120 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:22:42,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-04 02:22:42,180 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 2 equivalence classes. [2025-03-04 02:22:42,195 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 02:22:42,196 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-04 02:22:42,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:42,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-04 02:22:42,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:22:42,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-04 02:22:42,443 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 02:22:42,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2025-03-04 02:22:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:22:42,502 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:22:42,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2025-03-04 02:22:42,859 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 02:22:42,859 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 68 treesize of output 56 [2025-03-04 02:22:42,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:22:42,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731790966] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:22:42,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:22:42,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 42 [2025-03-04 02:22:42,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825063658] [2025-03-04 02:22:42,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:22:42,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-03-04 02:22:42,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:42,944 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-03-04 02:22:42,944 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1521, Unknown=0, NotChecked=0, Total=1806 [2025-03-04 02:22:42,972 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-04 02:22:42,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 880 transitions, 15441 flow. Second operand has 43 states, 43 states have (on average 4.6976744186046515) internal successors, (202), 43 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:42,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:42,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-04 02:22:42,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:45,997 INFO L124 PetriNetUnfolderBase]: 5044/8370 cut-off events. [2025-03-04 02:22:45,997 INFO L125 PetriNetUnfolderBase]: For 117488/117488 co-relation queries the response was YES. [2025-03-04 02:22:46,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68012 conditions, 8370 events. 5044/8370 cut-off events. For 117488/117488 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 54616 event pairs, 75 based on Foata normal form. 1/8371 useless extension candidates. Maximal degree in co-relation 67611. Up to 4140 conditions per place. [2025-03-04 02:22:46,065 INFO L140 encePairwiseOnDemand]: 10/24 looper letters, 487 selfloop transitions, 882 changer transitions 2/1372 dead transitions. [2025-03-04 02:22:46,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 1372 transitions, 26087 flow [2025-03-04 02:22:46,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2025-03-04 02:22:46,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2025-03-04 02:22:46,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 357 transitions. [2025-03-04 02:22:46,066 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34593023255813954 [2025-03-04 02:22:46,066 INFO L175 Difference]: Start difference. First operand has 260 places, 880 transitions, 15441 flow. Second operand 43 states and 357 transitions. [2025-03-04 02:22:46,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 1372 transitions, 26087 flow [2025-03-04 02:22:46,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 1372 transitions, 25689 flow, removed 120 selfloop flow, removed 13 redundant places. [2025-03-04 02:22:46,820 INFO L231 Difference]: Finished difference. Result has 303 places, 1221 transitions, 24732 flow [2025-03-04 02:22:46,820 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=15094, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=880, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=572, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=24732, PETRI_PLACES=303, PETRI_TRANSITIONS=1221} [2025-03-04 02:22:46,821 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 278 predicate places. [2025-03-04 02:22:46,821 INFO L471 AbstractCegarLoop]: Abstraction has has 303 places, 1221 transitions, 24732 flow [2025-03-04 02:22:46,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.6976744186046515) internal successors, (202), 43 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:46,821 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:46,821 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:22:46,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-04 02:22:47,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:47,022 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:22:47,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:47,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1765790141, now seen corresponding path program 19 times [2025-03-04 02:22:47,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:47,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203451481] [2025-03-04 02:22:47,022 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-04 02:22:47,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:47,026 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-04 02:22:47,031 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 02:22:47,031 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:22:47,031 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:47,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:22:47,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:47,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203451481] [2025-03-04 02:22:47,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203451481] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:22:47,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631810847] [2025-03-04 02:22:47,412 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-04 02:22:47,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:47,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:22:47,414 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:22:47,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-04 02:22:47,453 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-04 02:22:47,465 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 02:22:47,465 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:22:47,465 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:47,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-04 02:22:47,466 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:22:47,568 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:22:47,568 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:22:47,681 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 02:22:47,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2025-03-04 02:22:47,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:22:47,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631810847] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:22:47,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:22:47,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2025-03-04 02:22:47,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055671186] [2025-03-04 02:22:47,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:22:47,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-04 02:22:47,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:47,712 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-04 02:22:47,712 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2025-03-04 02:22:47,810 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-04 02:22:47,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 1221 transitions, 24732 flow. Second operand has 29 states, 29 states have (on average 5.827586206896552) internal successors, (169), 29 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:47,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:47,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-04 02:22:47,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:50,403 INFO L124 PetriNetUnfolderBase]: 5026/8603 cut-off events. [2025-03-04 02:22:50,403 INFO L125 PetriNetUnfolderBase]: For 168997/169061 co-relation queries the response was YES. [2025-03-04 02:22:50,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80328 conditions, 8603 events. 5026/8603 cut-off events. For 168997/169061 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 59653 event pairs, 110 based on Foata normal form. 15/8590 useless extension candidates. Maximal degree in co-relation 79977. Up to 4976 conditions per place. [2025-03-04 02:22:50,485 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 618 selfloop transitions, 710 changer transitions 1/1410 dead transitions. [2025-03-04 02:22:50,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 1410 transitions, 30868 flow [2025-03-04 02:22:50,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-04 02:22:50,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-03-04 02:22:50,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 219 transitions. [2025-03-04 02:22:50,486 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3967391304347826 [2025-03-04 02:22:50,486 INFO L175 Difference]: Start difference. First operand has 303 places, 1221 transitions, 24732 flow. Second operand 23 states and 219 transitions. [2025-03-04 02:22:50,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 1410 transitions, 30868 flow [2025-03-04 02:22:51,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 1410 transitions, 28940 flow, removed 836 selfloop flow, removed 20 redundant places. [2025-03-04 02:22:51,763 INFO L231 Difference]: Finished difference. Result has 312 places, 1325 transitions, 28066 flow [2025-03-04 02:22:51,764 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=23084, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=615, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=28066, PETRI_PLACES=312, PETRI_TRANSITIONS=1325} [2025-03-04 02:22:51,764 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 287 predicate places. [2025-03-04 02:22:51,764 INFO L471 AbstractCegarLoop]: Abstraction has has 312 places, 1325 transitions, 28066 flow [2025-03-04 02:22:51,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.827586206896552) internal successors, (169), 29 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:51,764 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:51,765 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:22:51,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-04 02:22:51,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:51,965 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:22:51,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:51,966 INFO L85 PathProgramCache]: Analyzing trace with hash -995232573, now seen corresponding path program 20 times [2025-03-04 02:22:51,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:51,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076035493] [2025-03-04 02:22:51,966 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:22:51,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:51,971 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-04 02:22:51,978 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 02:22:51,978 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:22:51,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:52,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:22:52,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:52,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076035493] [2025-03-04 02:22:52,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076035493] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:22:52,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426403053] [2025-03-04 02:22:52,344 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 02:22:52,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:52,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:22:52,346 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:22:52,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-04 02:22:52,389 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-04 02:22:52,405 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 02:22:52,405 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 02:22:52,405 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:52,406 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-03-04 02:22:52,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:22:52,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-04 02:22:52,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:22:52,658 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:22:52,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:22:52,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426403053] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:22:52,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:22:52,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 12] total 37 [2025-03-04 02:22:52,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559293375] [2025-03-04 02:22:52,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:22:52,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-04 02:22:52,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:22:52,951 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-04 02:22:52,951 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2025-03-04 02:22:52,968 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-04 02:22:52,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 1325 transitions, 28066 flow. Second operand has 38 states, 38 states have (on average 4.684210526315789) internal successors, (178), 38 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:52,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:22:52,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-04 02:22:52,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:22:57,332 INFO L124 PetriNetUnfolderBase]: 6076/10076 cut-off events. [2025-03-04 02:22:57,332 INFO L125 PetriNetUnfolderBase]: For 191904/191904 co-relation queries the response was YES. [2025-03-04 02:22:57,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94069 conditions, 10076 events. 6076/10076 cut-off events. For 191904/191904 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 68152 event pairs, 105 based on Foata normal form. 2/10078 useless extension candidates. Maximal degree in co-relation 93698. Up to 5326 conditions per place. [2025-03-04 02:22:57,426 INFO L140 encePairwiseOnDemand]: 9/24 looper letters, 531 selfloop transitions, 1251 changer transitions 4/1787 dead transitions. [2025-03-04 02:22:57,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 1787 transitions, 39070 flow [2025-03-04 02:22:57,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2025-03-04 02:22:57,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2025-03-04 02:22:57,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 530 transitions. [2025-03-04 02:22:57,427 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31547619047619047 [2025-03-04 02:22:57,427 INFO L175 Difference]: Start difference. First operand has 312 places, 1325 transitions, 28066 flow. Second operand 70 states and 530 transitions. [2025-03-04 02:22:57,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 1787 transitions, 39070 flow [2025-03-04 02:22:58,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 1787 transitions, 38175 flow, removed 278 selfloop flow, removed 13 redundant places. [2025-03-04 02:22:58,763 INFO L231 Difference]: Finished difference. Result has 388 places, 1663 transitions, 38263 flow [2025-03-04 02:22:58,764 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=27268, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=944, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=38263, PETRI_PLACES=388, PETRI_TRANSITIONS=1663} [2025-03-04 02:22:58,764 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 363 predicate places. [2025-03-04 02:22:58,764 INFO L471 AbstractCegarLoop]: Abstraction has has 388 places, 1663 transitions, 38263 flow [2025-03-04 02:22:58,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.684210526315789) internal successors, (178), 38 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:22:58,765 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:22:58,765 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:22:58,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-04 02:22:58,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-03-04 02:22:58,965 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:22:58,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:22:58,966 INFO L85 PathProgramCache]: Analyzing trace with hash -882159925, now seen corresponding path program 21 times [2025-03-04 02:22:58,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:22:58,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298952402] [2025-03-04 02:22:58,966 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 02:22:58,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:22:58,970 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 2 equivalence classes. [2025-03-04 02:22:58,976 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 02:22:58,976 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 02:22:58,976 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:59,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:22:59,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:22:59,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298952402] [2025-03-04 02:22:59,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298952402] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:22:59,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029879856] [2025-03-04 02:22:59,498 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 02:22:59,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:22:59,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:22:59,500 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:22:59,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-04 02:22:59,545 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 2 equivalence classes. [2025-03-04 02:22:59,560 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 02:22:59,561 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-04 02:22:59,561 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:22:59,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-03-04 02:22:59,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:22:59,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-04 02:22:59,881 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 02:22:59,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2025-03-04 02:22:59,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:22:59,930 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:23:00,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2025-03-04 02:23:00,451 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 02:23:00,451 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 72 treesize of output 56 [2025-03-04 02:23:00,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:23:00,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029879856] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:23:00,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:23:00,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 46 [2025-03-04 02:23:00,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357184298] [2025-03-04 02:23:00,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:23:00,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-03-04 02:23:00,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:23:00,541 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-03-04 02:23:00,541 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1887, Unknown=0, NotChecked=0, Total=2162 [2025-03-04 02:23:00,562 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-04 02:23:00,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 1663 transitions, 38263 flow. Second operand has 47 states, 47 states have (on average 4.595744680851064) internal successors, (216), 47 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:23:00,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:23:00,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-04 02:23:00,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:23:05,055 INFO L124 PetriNetUnfolderBase]: 6314/10484 cut-off events. [2025-03-04 02:23:05,055 INFO L125 PetriNetUnfolderBase]: For 223470/223470 co-relation queries the response was YES. [2025-03-04 02:23:05,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106925 conditions, 10484 events. 6314/10484 cut-off events. For 223470/223470 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 71392 event pairs, 81 based on Foata normal form. 1/10485 useless extension candidates. Maximal degree in co-relation 106497. Up to 5541 conditions per place. [2025-03-04 02:23:05,306 INFO L140 encePairwiseOnDemand]: 9/24 looper letters, 630 selfloop transitions, 1206 changer transitions 4/1841 dead transitions. [2025-03-04 02:23:05,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 1841 transitions, 44524 flow [2025-03-04 02:23:05,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-03-04 02:23:05,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2025-03-04 02:23:05,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 332 transitions. [2025-03-04 02:23:05,308 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32936507936507936 [2025-03-04 02:23:05,308 INFO L175 Difference]: Start difference. First operand has 388 places, 1663 transitions, 38263 flow. Second operand 42 states and 332 transitions. [2025-03-04 02:23:05,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 1841 transitions, 44524 flow [2025-03-04 02:23:07,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 1841 transitions, 43057 flow, removed 602 selfloop flow, removed 15 redundant places. [2025-03-04 02:23:07,698 INFO L231 Difference]: Finished difference. Result has 422 places, 1743 transitions, 42790 flow [2025-03-04 02:23:07,700 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=36826, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=42790, PETRI_PLACES=422, PETRI_TRANSITIONS=1743} [2025-03-04 02:23:07,700 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 397 predicate places. [2025-03-04 02:23:07,700 INFO L471 AbstractCegarLoop]: Abstraction has has 422 places, 1743 transitions, 42790 flow [2025-03-04 02:23:07,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 4.595744680851064) internal successors, (216), 47 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:23:07,700 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:23:07,700 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:23:07,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-04 02:23:07,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-03-04 02:23:07,901 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:23:07,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:23:07,902 INFO L85 PathProgramCache]: Analyzing trace with hash 77852807, now seen corresponding path program 22 times [2025-03-04 02:23:07,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:23:07,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969066123] [2025-03-04 02:23:07,902 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 02:23:07,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:23:07,908 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-04 02:23:07,915 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 02:23:07,916 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 02:23:07,916 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:23:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:23:08,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:23:08,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969066123] [2025-03-04 02:23:08,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969066123] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:23:08,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47494498] [2025-03-04 02:23:08,316 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 02:23:08,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:23:08,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:23:08,318 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:23:08,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-04 02:23:08,360 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-04 02:23:08,375 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 02:23:08,376 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 02:23:08,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:23:08,376 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-04 02:23:08,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:23:08,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:23:08,512 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:23:08,649 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 02:23:08,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2025-03-04 02:23:08,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:23:08,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47494498] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:23:08,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:23:08,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 30 [2025-03-04 02:23:08,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215155862] [2025-03-04 02:23:08,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:23:08,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-04 02:23:08,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:23:08,691 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-04 02:23:08,691 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2025-03-04 02:23:08,709 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-04 02:23:08,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 1743 transitions, 42790 flow. Second operand has 31 states, 31 states have (on average 5.032258064516129) internal successors, (156), 31 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:23:08,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:23:08,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-04 02:23:08,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:23:13,397 INFO L124 PetriNetUnfolderBase]: 6763/11232 cut-off events. [2025-03-04 02:23:13,398 INFO L125 PetriNetUnfolderBase]: For 278024/278024 co-relation queries the response was YES. [2025-03-04 02:23:13,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120902 conditions, 11232 events. 6763/11232 cut-off events. For 278024/278024 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 77485 event pairs, 265 based on Foata normal form. 1/11233 useless extension candidates. Maximal degree in co-relation 120772. Up to 6976 conditions per place. [2025-03-04 02:23:13,534 INFO L140 encePairwiseOnDemand]: 12/24 looper letters, 1152 selfloop transitions, 914 changer transitions 1/2068 dead transitions. [2025-03-04 02:23:13,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 2068 transitions, 53336 flow [2025-03-04 02:23:13,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-04 02:23:13,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2025-03-04 02:23:13,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 240 transitions. [2025-03-04 02:23:13,535 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2025-03-04 02:23:13,535 INFO L175 Difference]: Start difference. First operand has 422 places, 1743 transitions, 42790 flow. Second operand 30 states and 240 transitions. [2025-03-04 02:23:13,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 2068 transitions, 53336 flow [2025-03-04 02:23:16,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 2068 transitions, 52210 flow, removed 183 selfloop flow, removed 31 redundant places. [2025-03-04 02:23:16,922 INFO L231 Difference]: Finished difference. Result has 428 places, 1904 transitions, 49249 flow [2025-03-04 02:23:16,923 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=41850, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=755, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=902, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=49249, PETRI_PLACES=428, PETRI_TRANSITIONS=1904} [2025-03-04 02:23:16,924 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 403 predicate places. [2025-03-04 02:23:16,924 INFO L471 AbstractCegarLoop]: Abstraction has has 428 places, 1904 transitions, 49249 flow [2025-03-04 02:23:16,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.032258064516129) internal successors, (156), 31 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:23:16,924 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:23:16,924 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:23:16,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-03-04 02:23:17,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-04 02:23:17,125 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:23:17,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:23:17,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1339522253, now seen corresponding path program 23 times [2025-03-04 02:23:17,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:23:17,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433595351] [2025-03-04 02:23:17,125 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 02:23:17,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:23:17,133 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-03-04 02:23:17,143 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 02:23:17,143 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-04 02:23:17,143 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:23:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:23:17,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:23:17,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433595351] [2025-03-04 02:23:17,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433595351] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:23:17,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487562828] [2025-03-04 02:23:17,479 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 02:23:17,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:23:17,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:23:17,481 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:23:17,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-04 02:23:17,527 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-03-04 02:23:17,542 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 02:23:17,542 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-04 02:23:17,542 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:23:17,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-04 02:23:17,543 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:23:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:23:17,625 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:23:17,678 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 02:23:17,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2025-03-04 02:23:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:23:17,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487562828] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:23:17,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:23:17,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 18 [2025-03-04 02:23:17,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603783285] [2025-03-04 02:23:17,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:23:17,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-04 02:23:17,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:23:17,707 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-04 02:23:17,707 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2025-03-04 02:23:17,772 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-04 02:23:17,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 1904 transitions, 49249 flow. Second operand has 19 states, 19 states have (on average 6.842105263157895) internal successors, (130), 19 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:23:17,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:23:17,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-04 02:23:17,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:23:21,493 INFO L124 PetriNetUnfolderBase]: 6089/10747 cut-off events. [2025-03-04 02:23:21,493 INFO L125 PetriNetUnfolderBase]: For 344357/344360 co-relation queries the response was YES. [2025-03-04 02:23:21,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127673 conditions, 10747 events. 6089/10747 cut-off events. For 344357/344360 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 80681 event pairs, 154 based on Foata normal form. 4/10708 useless extension candidates. Maximal degree in co-relation 127216. Up to 7844 conditions per place. [2025-03-04 02:23:21,619 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 1489 selfloop transitions, 191 changer transitions 1/2033 dead transitions. [2025-03-04 02:23:21,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 2033 transitions, 55608 flow [2025-03-04 02:23:21,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-04 02:23:21,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-04 02:23:21,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 132 transitions. [2025-03-04 02:23:21,619 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2025-03-04 02:23:21,619 INFO L175 Difference]: Start difference. First operand has 428 places, 1904 transitions, 49249 flow. Second operand 12 states and 132 transitions. [2025-03-04 02:23:21,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 2033 transitions, 55608 flow [2025-03-04 02:23:25,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 2033 transitions, 55446 flow, removed 52 selfloop flow, removed 5 redundant places. [2025-03-04 02:23:25,512 INFO L231 Difference]: Finished difference. Result has 438 places, 1984 transitions, 52239 flow [2025-03-04 02:23:25,513 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=49095, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1904, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1722, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=52239, PETRI_PLACES=438, PETRI_TRANSITIONS=1984} [2025-03-04 02:23:25,514 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 413 predicate places. [2025-03-04 02:23:25,514 INFO L471 AbstractCegarLoop]: Abstraction has has 438 places, 1984 transitions, 52239 flow [2025-03-04 02:23:25,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.842105263157895) internal successors, (130), 19 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:23:25,514 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:23:25,514 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:23:25,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2025-03-04 02:23:25,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:23:25,714 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:23:25,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:23:25,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1880198575, now seen corresponding path program 24 times [2025-03-04 02:23:25,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:23:25,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070675008] [2025-03-04 02:23:25,715 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-04 02:23:25,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:23:25,720 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 2 equivalence classes. [2025-03-04 02:23:25,727 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 02:23:25,728 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-04 02:23:25,728 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:23:26,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:23:26,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:23:26,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070675008] [2025-03-04 02:23:26,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070675008] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:23:26,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355471608] [2025-03-04 02:23:26,054 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-04 02:23:26,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:23:26,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:23:26,056 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:23:26,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-04 02:23:26,104 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 2 equivalence classes. [2025-03-04 02:23:26,121 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 02:23:26,121 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-04 02:23:26,121 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:23:26,122 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-03-04 02:23:26,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:23:26,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-04 02:23:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:23:26,272 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:23:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:23:26,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355471608] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:23:26,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:23:26,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 9] total 27 [2025-03-04 02:23:26,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173476248] [2025-03-04 02:23:26,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:23:26,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-04 02:23:26,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:23:26,399 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-04 02:23:26,399 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2025-03-04 02:23:26,408 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-04 02:23:26,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 1984 transitions, 52239 flow. Second operand has 28 states, 28 states have (on average 5.214285714285714) internal successors, (146), 28 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:23:26,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:23:26,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-04 02:23:26,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:23:32,519 INFO L124 PetriNetUnfolderBase]: 7753/12862 cut-off events. [2025-03-04 02:23:32,519 INFO L125 PetriNetUnfolderBase]: For 357696/357696 co-relation queries the response was YES. [2025-03-04 02:23:32,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146752 conditions, 12862 events. 7753/12862 cut-off events. For 357696/357696 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 89905 event pairs, 178 based on Foata normal form. 2/12864 useless extension candidates. Maximal degree in co-relation 146246. Up to 8663 conditions per place. [2025-03-04 02:23:32,681 INFO L140 encePairwiseOnDemand]: 10/24 looper letters, 1235 selfloop transitions, 1171 changer transitions 2/2409 dead transitions. [2025-03-04 02:23:32,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 2409 transitions, 66811 flow [2025-03-04 02:23:32,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-03-04 02:23:32,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2025-03-04 02:23:32,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 332 transitions. [2025-03-04 02:23:32,682 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33739837398373984 [2025-03-04 02:23:32,682 INFO L175 Difference]: Start difference. First operand has 438 places, 1984 transitions, 52239 flow. Second operand 41 states and 332 transitions. [2025-03-04 02:23:32,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 2409 transitions, 66811 flow [2025-03-04 02:23:37,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 2409 transitions, 66607 flow, removed 45 selfloop flow, removed 6 redundant places. [2025-03-04 02:23:37,213 INFO L231 Difference]: Finished difference. Result has 489 places, 2248 transitions, 64024 flow [2025-03-04 02:23:37,214 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=52053, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1984, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=933, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=955, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=64024, PETRI_PLACES=489, PETRI_TRANSITIONS=2248} [2025-03-04 02:23:37,214 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 464 predicate places. [2025-03-04 02:23:37,214 INFO L471 AbstractCegarLoop]: Abstraction has has 489 places, 2248 transitions, 64024 flow [2025-03-04 02:23:37,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.214285714285714) internal successors, (146), 28 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:23:37,215 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:23:37,215 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:23:37,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2025-03-04 02:23:37,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-03-04 02:23:37,415 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 02:23:37,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:23:37,416 INFO L85 PathProgramCache]: Analyzing trace with hash 305457045, now seen corresponding path program 25 times [2025-03-04 02:23:37,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:23:37,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849937431] [2025-03-04 02:23:37,416 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-04 02:23:37,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:23:37,420 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-04 02:23:37,427 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 02:23:37,427 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:23:37,427 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:23:37,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:23:37,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:23:37,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849937431] [2025-03-04 02:23:37,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849937431] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 02:23:37,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840320771] [2025-03-04 02:23:37,823 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-04 02:23:37,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 02:23:37,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:23:37,825 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 02:23:37,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-04 02:23:37,869 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-04 02:23:37,881 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 02:23:37,881 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:23:37,881 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:23:37,882 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-04 02:23:37,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 02:23:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:23:38,001 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 02:23:38,116 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 02:23:38,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2025-03-04 02:23:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 02:23:38,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840320771] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 02:23:38,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 02:23:38,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2025-03-04 02:23:38,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112672203] [2025-03-04 02:23:38,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 02:23:38,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-04 02:23:38,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:23:38,147 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-04 02:23:38,147 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2025-03-04 02:23:38,227 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-04 02:23:38,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 2248 transitions, 64024 flow. Second operand has 29 states, 29 states have (on average 5.931034482758621) internal successors, (172), 29 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 02:23:38,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:23:38,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-04 02:23:38,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 02:23:44,206 INFO L124 PetriNetUnfolderBase]: 7315/12497 cut-off events. [2025-03-04 02:23:44,206 INFO L125 PetriNetUnfolderBase]: For 441258/441272 co-relation queries the response was YES. [2025-03-04 02:23:44,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156612 conditions, 12497 events. 7315/12497 cut-off events. For 441258/441272 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 91280 event pairs, 138 based on Foata normal form. 1/12478 useless extension candidates. Maximal degree in co-relation 156043. Up to 9948 conditions per place. [2025-03-04 02:23:44,369 INFO L140 encePairwiseOnDemand]: 12/24 looper letters, 1794 selfloop transitions, 394 changer transitions 1/2397 dead transitions. [2025-03-04 02:23:44,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 2397 transitions, 71735 flow [2025-03-04 02:23:44,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-04 02:23:44,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-04 02:23:44,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 197 transitions. [2025-03-04 02:23:44,374 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39087301587301587 [2025-03-04 02:23:44,374 INFO L175 Difference]: Start difference. First operand has 489 places, 2248 transitions, 64024 flow. Second operand 21 states and 197 transitions. [2025-03-04 02:23:44,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 2397 transitions, 71735 flow