./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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 faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 16:41:28,332 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 16:41:28,413 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 16:41:28,421 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 16:41:28,422 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 16:41:28,443 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 16:41:28,443 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 16:41:28,444 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 16:41:28,444 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 16:41:28,444 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 16:41:28,444 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 16:41:28,444 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 16:41:28,445 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 16:41:28,445 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 16:41:28,445 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 16:41:28,445 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 16:41:28,445 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 16:41:28,445 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 16:41:28,445 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 16:41:28,446 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 16:41:28,446 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 16:41:28,446 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 16:41:28,446 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 16:41:28,446 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 16:41:28,446 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 16:41:28,446 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 16:41:28,446 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 16:41:28,446 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 16:41:28,447 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 16:41:28,447 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 16:41:28,447 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 16:41:28,447 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 16:41:28,447 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:41:28,447 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 16:41:28,447 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 16:41:28,447 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 16:41:28,447 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 16:41:28,448 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:41:28,448 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 16:41:28,448 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 16:41:28,448 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 16:41:28,448 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 16:41:28,448 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 16:41:28,448 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 16:41:28,448 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 16:41:28,448 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 16:41:28,449 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 16:41:28,449 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 16:41:28,449 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-jdk21/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 -> faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 [2025-01-09 16:41:28,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 16:41:28,726 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 16:41:28,728 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 16:41:28,729 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 16:41:28,729 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 16:41:28,730 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2025-01-09 16:41:30,035 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b013a2331/1f01b40bf1de4a95b0db78af9d00aac5/FLAGa76d046f2 [2025-01-09 16:41:30,301 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 16:41:30,302 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2025-01-09 16:41:30,309 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b013a2331/1f01b40bf1de4a95b0db78af9d00aac5/FLAGa76d046f2 [2025-01-09 16:41:30,603 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b013a2331/1f01b40bf1de4a95b0db78af9d00aac5 [2025-01-09 16:41:30,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 16:41:30,607 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 16:41:30,608 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 16:41:30,608 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 16:41:30,613 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 16:41:30,613 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:41:30" (1/1) ... [2025-01-09 16:41:30,614 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@82b2baf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:41:30, skipping insertion in model container [2025-01-09 16:41:30,614 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:41:30" (1/1) ... [2025-01-09 16:41:30,628 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 16:41:30,797 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c[2781,2794] [2025-01-09 16:41:30,813 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 16:41:30,826 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 16:41:30,852 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c[2781,2794] [2025-01-09 16:41:30,860 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 16:41:30,877 INFO L204 MainTranslator]: Completed translation [2025-01-09 16:41:30,878 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:41:30 WrapperNode [2025-01-09 16:41:30,878 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 16:41:30,879 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 16:41:30,879 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 16:41:30,879 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 16:41:30,886 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:41:30" (1/1) ... [2025-01-09 16:41:30,895 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:41:30" (1/1) ... [2025-01-09 16:41:30,930 INFO L138 Inliner]: procedures = 22, calls = 31, calls flagged for inlining = 17, calls inlined = 31, statements flattened = 268 [2025-01-09 16:41:30,931 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 16:41:30,931 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 16:41:30,932 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 16:41:30,932 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 16:41:30,940 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:41:30" (1/1) ... [2025-01-09 16:41:30,941 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:41:30" (1/1) ... [2025-01-09 16:41:30,948 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:41:30" (1/1) ... [2025-01-09 16:41:30,968 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 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]. [2025-01-09 16:41:30,973 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:41:30" (1/1) ... [2025-01-09 16:41:30,973 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:41:30" (1/1) ... [2025-01-09 16:41:30,983 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:41:30" (1/1) ... [2025-01-09 16:41:30,987 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:41:30" (1/1) ... [2025-01-09 16:41:30,991 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:41:30" (1/1) ... [2025-01-09 16:41:30,999 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:41:30" (1/1) ... [2025-01-09 16:41:31,001 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:41:30" (1/1) ... [2025-01-09 16:41:31,007 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 16:41:31,007 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 16:41:31,008 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 16:41:31,008 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 16:41:31,009 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:41:30" (1/1) ... [2025-01-09 16:41:31,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:41:31,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:41:31,039 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-09 16:41:31,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-09 16:41:31,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 16:41:31,065 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-01-09 16:41:31,065 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-01-09 16:41:31,065 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-01-09 16:41:31,066 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-01-09 16:41:31,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 16:41:31,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-09 16:41:31,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-09 16:41:31,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-09 16:41:31,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-09 16:41:31,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 16:41:31,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 16:41:31,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-09 16:41:31,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-09 16:41:31,068 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-01-09 16:41:31,170 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 16:41:31,171 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 16:41:31,635 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-09 16:41:31,635 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 16:41:32,041 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 16:41:32,041 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-09 16:41:32,042 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:41:32 BoogieIcfgContainer [2025-01-09 16:41:32,043 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 16:41:32,045 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 16:41:32,045 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 16:41:32,049 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 16:41:32,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 04:41:30" (1/3) ... [2025-01-09 16:41:32,051 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4363ad3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:41:32, skipping insertion in model container [2025-01-09 16:41:32,051 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:41:30" (2/3) ... [2025-01-09 16:41:32,051 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4363ad3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:41:32, skipping insertion in model container [2025-01-09 16:41:32,052 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:41:32" (3/3) ... [2025-01-09 16:41:32,053 INFO L128 eAbstractionObserver]: Analyzing ICFG parallel-misc-1.wvr.c [2025-01-09 16:41:32,069 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 16:41:32,072 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG parallel-misc-1.wvr.c that has 3 procedures, 18 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-01-09 16:41:32,072 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-09 16:41:32,131 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-01-09 16:41:32,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2025-01-09 16:41:32,205 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2025-01-09 16:41:32,208 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-09 16:41:32,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2025-01-09 16:41:32,212 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2025-01-09 16:41:32,215 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2025-01-09 16:41:32,225 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 16:41:32,241 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;@55242022, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 16:41:32,242 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-01-09 16:41:32,298 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-09 16:41:32,299 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2025-01-09 16:41:32,299 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-09 16:41:32,299 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:41:32,300 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:41:32,300 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:41:32,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:41:32,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1506903863, now seen corresponding path program 1 times [2025-01-09 16:41:32,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:41:32,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124336456] [2025-01-09 16:41:32,314 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:41:32,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:41:32,388 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-09 16:41:32,452 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-09 16:41:32,453 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:41:32,454 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:41:32,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:41:32,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124336456] [2025-01-09 16:41:32,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124336456] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:41:32,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:41:32,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 16:41:32,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526156550] [2025-01-09 16:41:32,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:41:32,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 16:41:32,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:41:32,882 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 16:41:32,883 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 16:41:32,885 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:41:32,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 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) [2025-01-09 16:41:32,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:41:32,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:41:32,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:41:33,061 INFO L124 PetriNetUnfolderBase]: 93/152 cut-off events. [2025-01-09 16:41:33,061 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-01-09 16:41:33,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 152 events. 93/152 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 423 event pairs, 8 based on Foata normal form. 1/97 useless extension candidates. Maximal degree in co-relation 267. Up to 102 conditions per place. [2025-01-09 16:41:33,065 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 25 selfloop transitions, 10 changer transitions 1/39 dead transitions. [2025-01-09 16:41:33,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 39 transitions, 177 flow [2025-01-09 16:41:33,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 16:41:33,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-09 16:41:33,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2025-01-09 16:41:33,080 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.62 [2025-01-09 16:41:33,083 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 5 states and 62 transitions. [2025-01-09 16:41:33,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 39 transitions, 177 flow [2025-01-09 16:41:33,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 39 transitions, 159 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-09 16:41:33,093 INFO L231 Difference]: Finished difference. Result has 24 places, 26 transitions, 101 flow [2025-01-09 16:41:33,095 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=101, PETRI_PLACES=24, PETRI_TRANSITIONS=26} [2025-01-09 16:41:33,098 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2025-01-09 16:41:33,099 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 26 transitions, 101 flow [2025-01-09 16:41:33,100 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) [2025-01-09 16:41:33,100 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:41:33,100 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:41:33,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 16:41:33,100 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:41:33,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:41:33,102 INFO L85 PathProgramCache]: Analyzing trace with hash -695733883, now seen corresponding path program 1 times [2025-01-09 16:41:33,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:41:33,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365814351] [2025-01-09 16:41:33,102 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:41:33,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:41:33,122 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-09 16:41:33,162 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-09 16:41:33,162 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:41:33,162 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:33,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:41:33,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:41:33,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365814351] [2025-01-09 16:41:33,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365814351] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:41:33,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:41:33,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-09 16:41:33,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503869154] [2025-01-09 16:41:33,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:41:33,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 16:41:33,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:41:33,348 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 16:41:33,348 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 16:41:33,349 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:41:33,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 26 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:33,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:41:33,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:41:33,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:41:33,473 INFO L124 PetriNetUnfolderBase]: 125/213 cut-off events. [2025-01-09 16:41:33,473 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2025-01-09 16:41:33,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 667 conditions, 213 events. 125/213 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 714 event pairs, 46 based on Foata normal form. 12/202 useless extension candidates. Maximal degree in co-relation 219. Up to 108 conditions per place. [2025-01-09 16:41:33,478 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 31 selfloop transitions, 5 changer transitions 0/39 dead transitions. [2025-01-09 16:41:33,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 39 transitions, 223 flow [2025-01-09 16:41:33,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 16:41:33,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-09 16:41:33,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2025-01-09 16:41:33,482 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5625 [2025-01-09 16:41:33,482 INFO L175 Difference]: Start difference. First operand has 24 places, 26 transitions, 101 flow. Second operand 4 states and 45 transitions. [2025-01-09 16:41:33,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 39 transitions, 223 flow [2025-01-09 16:41:33,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 39 transitions, 217 flow, removed 3 selfloop flow, removed 0 redundant places. [2025-01-09 16:41:33,487 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 140 flow [2025-01-09 16:41:33,487 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2025-01-09 16:41:33,488 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2025-01-09 16:41:33,488 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 140 flow [2025-01-09 16:41:33,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:33,490 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:41:33,490 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:41:33,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-09 16:41:33,490 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:41:33,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:41:33,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1578230838, now seen corresponding path program 1 times [2025-01-09 16:41:33,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:41:33,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303254859] [2025-01-09 16:41:33,492 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:41:33,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:41:33,504 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-09 16:41:33,523 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-09 16:41:33,523 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:41:33,523 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:33,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:41:33,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:41:33,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303254859] [2025-01-09 16:41:33,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303254859] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:41:33,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:41:33,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-09 16:41:33,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740614157] [2025-01-09 16:41:33,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:41:33,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 16:41:33,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:41:33,667 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 16:41:33,668 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 16:41:33,668 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:41:33,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 140 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:33,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:41:33,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:41:33,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:41:33,748 INFO L124 PetriNetUnfolderBase]: 100/176 cut-off events. [2025-01-09 16:41:33,748 INFO L125 PetriNetUnfolderBase]: For 290/290 co-relation queries the response was YES. [2025-01-09 16:41:33,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 176 events. 100/176 cut-off events. For 290/290 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 568 event pairs, 30 based on Foata normal form. 5/176 useless extension candidates. Maximal degree in co-relation 517. Up to 89 conditions per place. [2025-01-09 16:41:33,751 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 27 selfloop transitions, 5 changer transitions 4/39 dead transitions. [2025-01-09 16:41:33,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 39 transitions, 262 flow [2025-01-09 16:41:33,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 16:41:33,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-09 16:41:33,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2025-01-09 16:41:33,752 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.55 [2025-01-09 16:41:33,752 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 140 flow. Second operand 4 states and 44 transitions. [2025-01-09 16:41:33,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 39 transitions, 262 flow [2025-01-09 16:41:33,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 39 transitions, 260 flow, removed 1 selfloop flow, removed 0 redundant places. [2025-01-09 16:41:33,755 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 138 flow [2025-01-09 16:41:33,755 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2025-01-09 16:41:33,755 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2025-01-09 16:41:33,756 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 138 flow [2025-01-09 16:41:33,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:33,756 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:41:33,756 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:41:33,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-09 16:41:33,756 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:41:33,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:41:33,757 INFO L85 PathProgramCache]: Analyzing trace with hash 371285816, now seen corresponding path program 1 times [2025-01-09 16:41:33,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:41:33,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055022847] [2025-01-09 16:41:33,757 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:41:33,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:41:33,765 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-09 16:41:33,774 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:41:33,775 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:41:33,775 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:33,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:41:33,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:41:33,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055022847] [2025-01-09 16:41:33,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055022847] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:41:33,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427601321] [2025-01-09 16:41:33,901 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:41:33,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:41:33,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:41:33,905 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:41:33,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-09 16:41:33,968 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-09 16:41:33,997 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:41:33,998 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:41:33,998 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:34,002 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-09 16:41:34,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:41:34,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:41:34,117 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:41:34,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:41:34,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427601321] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-09 16:41:34,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-09 16:41:34,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2025-01-09 16:41:34,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787318866] [2025-01-09 16:41:34,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:41:34,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 16:41:34,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:41:34,194 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 16:41:34,195 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2025-01-09 16:41:34,195 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:41:34,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:34,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:41:34,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:41:34,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:41:34,290 INFO L124 PetriNetUnfolderBase]: 76/129 cut-off events. [2025-01-09 16:41:34,290 INFO L125 PetriNetUnfolderBase]: For 319/319 co-relation queries the response was YES. [2025-01-09 16:41:34,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 129 events. 76/129 cut-off events. For 319/319 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 338 event pairs, 12 based on Foata normal form. 12/139 useless extension candidates. Maximal degree in co-relation 461. Up to 80 conditions per place. [2025-01-09 16:41:34,294 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 23 selfloop transitions, 6 changer transitions 0/32 dead transitions. [2025-01-09 16:41:34,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 32 transitions, 220 flow [2025-01-09 16:41:34,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 16:41:34,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-09 16:41:34,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 46 transitions. [2025-01-09 16:41:34,295 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46 [2025-01-09 16:41:34,296 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 138 flow. Second operand 5 states and 46 transitions. [2025-01-09 16:41:34,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 32 transitions, 220 flow [2025-01-09 16:41:34,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 32 transitions, 183 flow, removed 6 selfloop flow, removed 7 redundant places. [2025-01-09 16:41:34,301 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 129 flow [2025-01-09 16:41:34,301 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2025-01-09 16:41:34,302 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2025-01-09 16:41:34,302 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 129 flow [2025-01-09 16:41:34,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:34,302 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:41:34,302 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:41:34,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-01-09 16:41:34,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:41:34,503 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:41:34,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:41:34,504 INFO L85 PathProgramCache]: Analyzing trace with hash 520566835, now seen corresponding path program 1 times [2025-01-09 16:41:34,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:41:34,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91654662] [2025-01-09 16:41:34,504 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:41:34,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:41:34,517 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-09 16:41:34,533 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:41:34,533 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:41:34,534 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:34,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:41:34,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:41:34,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91654662] [2025-01-09 16:41:34,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91654662] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:41:34,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202032667] [2025-01-09 16:41:34,664 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:41:34,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:41:34,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:41:34,667 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:41:34,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-09 16:41:34,729 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-09 16:41:34,755 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:41:34,755 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:41:34,755 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:34,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-09 16:41:34,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:41:34,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:41:34,819 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:41:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:41:34,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202032667] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-09 16:41:34,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-09 16:41:34,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2025-01-09 16:41:34,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558976169] [2025-01-09 16:41:34,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:41:34,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 16:41:34,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:41:34,871 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 16:41:34,872 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2025-01-09 16:41:34,873 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:41:34,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 129 flow. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:34,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:41:34,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:41:34,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:41:34,953 INFO L124 PetriNetUnfolderBase]: 59/102 cut-off events. [2025-01-09 16:41:34,954 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2025-01-09 16:41:34,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 102 events. 59/102 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 218 event pairs, 5 based on Foata normal form. 7/106 useless extension candidates. Maximal degree in co-relation 348. Up to 80 conditions per place. [2025-01-09 16:41:34,956 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 28 selfloop transitions, 6 changer transitions 0/37 dead transitions. [2025-01-09 16:41:34,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 37 transitions, 235 flow [2025-01-09 16:41:34,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 16:41:34,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-09 16:41:34,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2025-01-09 16:41:34,959 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47 [2025-01-09 16:41:34,959 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 129 flow. Second operand 5 states and 47 transitions. [2025-01-09 16:41:34,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 37 transitions, 235 flow [2025-01-09 16:41:34,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 37 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-09 16:41:34,961 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 159 flow [2025-01-09 16:41:34,962 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=159, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2025-01-09 16:41:34,963 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2025-01-09 16:41:34,963 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 159 flow [2025-01-09 16:41:34,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:34,963 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:41:34,963 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:41:34,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-01-09 16:41:35,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:41:35,164 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:41:35,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:41:35,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1964567606, now seen corresponding path program 1 times [2025-01-09 16:41:35,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:41:35,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559987854] [2025-01-09 16:41:35,166 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:41:35,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:41:35,178 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-01-09 16:41:35,238 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 16:41:35,238 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:41:35,238 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:36,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:41:36,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:41:36,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559987854] [2025-01-09 16:41:36,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559987854] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:41:36,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823929544] [2025-01-09 16:41:36,282 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:41:36,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:41:36,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:41:36,284 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:41:36,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-09 16:41:36,349 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-01-09 16:41:36,375 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 16:41:36,375 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:41:36,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:36,382 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-01-09 16:41:36,385 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:41:36,421 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 [2025-01-09 16:41:36,696 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 87 treesize of output 59 [2025-01-09 16:41:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:41:36,733 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:41:37,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:41:37,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823929544] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:41:37,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:41:37,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-01-09 16:41:37,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585778359] [2025-01-09 16:41:37,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:41:37,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-09 16:41:37,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:41:37,643 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-09 16:41:37,643 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2025-01-09 16:41:37,643 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:41:37,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 159 flow. Second operand has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 17 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:37,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:41:37,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:41:37,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:41:38,030 INFO L124 PetriNetUnfolderBase]: 82/154 cut-off events. [2025-01-09 16:41:38,030 INFO L125 PetriNetUnfolderBase]: For 173/173 co-relation queries the response was YES. [2025-01-09 16:41:38,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 154 events. 82/154 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 423 event pairs, 0 based on Foata normal form. 1/152 useless extension candidates. Maximal degree in co-relation 449. Up to 84 conditions per place. [2025-01-09 16:41:38,035 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 38 selfloop transitions, 23 changer transitions 3/67 dead transitions. [2025-01-09 16:41:38,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 67 transitions, 428 flow [2025-01-09 16:41:38,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-09 16:41:38,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-01-09 16:41:38,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 122 transitions. [2025-01-09 16:41:38,036 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2025-01-09 16:41:38,036 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 159 flow. Second operand 12 states and 122 transitions. [2025-01-09 16:41:38,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 67 transitions, 428 flow [2025-01-09 16:41:38,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 67 transitions, 425 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-09 16:41:38,040 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 297 flow [2025-01-09 16:41:38,040 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=297, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2025-01-09 16:41:38,041 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 26 predicate places. [2025-01-09 16:41:38,041 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 297 flow [2025-01-09 16:41:38,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.117647058823529) internal successors, (121), 17 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:38,042 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:41:38,042 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:41:38,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-09 16:41:38,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:41:38,246 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:41:38,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:41:38,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1035668964, now seen corresponding path program 2 times [2025-01-09 16:41:38,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:41:38,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809702794] [2025-01-09 16:41:38,247 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:41:38,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:41:38,261 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-01-09 16:41:38,315 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 16:41:38,316 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:41:38,316 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:39,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:41:39,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:41:39,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809702794] [2025-01-09 16:41:39,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809702794] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:41:39,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764537535] [2025-01-09 16:41:39,268 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:41:39,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:41:39,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:41:39,272 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:41:39,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-09 16:41:39,330 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-01-09 16:41:39,355 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 16:41:39,355 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:41:39,355 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:39,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-01-09 16:41:39,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:41:39,657 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 87 treesize of output 59 [2025-01-09 16:41:39,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:41:39,731 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:41:40,036 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 16:41:40,038 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 214 treesize of output 142 [2025-01-09 16:41:40,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:41:40,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764537535] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:41:40,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:41:40,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2025-01-09 16:41:40,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866224302] [2025-01-09 16:41:40,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:41:40,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-09 16:41:40,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:41:40,406 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-09 16:41:40,406 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2025-01-09 16:41:40,407 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:41:40,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 297 flow. Second operand has 18 states, 18 states have (on average 6.944444444444445) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:40,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:41:40,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:41:40,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:41:40,706 INFO L124 PetriNetUnfolderBase]: 98/178 cut-off events. [2025-01-09 16:41:40,706 INFO L125 PetriNetUnfolderBase]: For 352/352 co-relation queries the response was YES. [2025-01-09 16:41:40,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 813 conditions, 178 events. 98/178 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 512 event pairs, 1 based on Foata normal form. 1/175 useless extension candidates. Maximal degree in co-relation 632. Up to 98 conditions per place. [2025-01-09 16:41:40,708 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 29 selfloop transitions, 32 changer transitions 3/67 dead transitions. [2025-01-09 16:41:40,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 67 transitions, 549 flow [2025-01-09 16:41:40,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-09 16:41:40,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-01-09 16:41:40,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 115 transitions. [2025-01-09 16:41:40,709 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2025-01-09 16:41:40,709 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 297 flow. Second operand 12 states and 115 transitions. [2025-01-09 16:41:40,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 67 transitions, 549 flow [2025-01-09 16:41:40,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 67 transitions, 493 flow, removed 9 selfloop flow, removed 5 redundant places. [2025-01-09 16:41:40,713 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 408 flow [2025-01-09 16:41:40,713 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=408, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2025-01-09 16:41:40,714 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 34 predicate places. [2025-01-09 16:41:40,714 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 408 flow [2025-01-09 16:41:40,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.944444444444445) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:40,714 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:41:40,715 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:41:40,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-01-09 16:41:40,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-01-09 16:41:40,919 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:41:40,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:41:40,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1118785854, now seen corresponding path program 3 times [2025-01-09 16:41:40,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:41:40,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211581933] [2025-01-09 16:41:40,920 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:41:40,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:41:40,929 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 2 equivalence classes. [2025-01-09 16:41:40,969 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 16:41:40,969 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:41:40,969 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:41:41,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:41:41,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211581933] [2025-01-09 16:41:41,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211581933] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:41:41,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554402449] [2025-01-09 16:41:41,859 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:41:41,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:41:41,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:41:41,861 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:41:41,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-09 16:41:41,914 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 2 equivalence classes. [2025-01-09 16:41:41,942 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 16:41:41,942 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:41:41,942 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:41,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-01-09 16:41:41,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:41:42,213 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 87 treesize of output 59 [2025-01-09 16:41:42,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:41:42,286 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:41:42,553 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 16:41:42,554 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 214 treesize of output 142 [2025-01-09 16:41:42,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:41:42,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554402449] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:41:42,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:41:42,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2025-01-09 16:41:42,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719017894] [2025-01-09 16:41:42,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:41:42,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-01-09 16:41:42,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:41:42,855 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-01-09 16:41:42,855 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2025-01-09 16:41:42,855 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:41:42,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 408 flow. Second operand has 19 states, 19 states have (on average 6.894736842105263) internal successors, (131), 19 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:42,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:41:42,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:41:42,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:41:43,177 INFO L124 PetriNetUnfolderBase]: 112/204 cut-off events. [2025-01-09 16:41:43,177 INFO L125 PetriNetUnfolderBase]: For 450/450 co-relation queries the response was YES. [2025-01-09 16:41:43,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1030 conditions, 204 events. 112/204 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 628 event pairs, 0 based on Foata normal form. 1/201 useless extension candidates. Maximal degree in co-relation 848. Up to 110 conditions per place. [2025-01-09 16:41:43,179 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 38 selfloop transitions, 31 changer transitions 3/75 dead transitions. [2025-01-09 16:41:43,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 75 transitions, 660 flow [2025-01-09 16:41:43,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-09 16:41:43,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-01-09 16:41:43,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 117 transitions. [2025-01-09 16:41:43,181 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4875 [2025-01-09 16:41:43,181 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 408 flow. Second operand 12 states and 117 transitions. [2025-01-09 16:41:43,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 75 transitions, 660 flow [2025-01-09 16:41:43,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 75 transitions, 546 flow, removed 28 selfloop flow, removed 8 redundant places. [2025-01-09 16:41:43,186 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 430 flow [2025-01-09 16:41:43,186 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=430, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2025-01-09 16:41:43,187 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 40 predicate places. [2025-01-09 16:41:43,188 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 430 flow [2025-01-09 16:41:43,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.894736842105263) internal successors, (131), 19 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:43,189 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:41:43,189 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:41:43,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-01-09 16:41:43,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:41:43,393 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:41:43,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:41:43,393 INFO L85 PathProgramCache]: Analyzing trace with hash -540460270, now seen corresponding path program 4 times [2025-01-09 16:41:43,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:41:43,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336349853] [2025-01-09 16:41:43,393 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:41:43,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:41:43,400 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 17 statements into 2 equivalence classes. [2025-01-09 16:41:43,432 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 16:41:43,432 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:41:43,432 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:44,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:41:44,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:41:44,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336349853] [2025-01-09 16:41:44,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336349853] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:41:44,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595090555] [2025-01-09 16:41:44,162 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:41:44,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:41:44,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:41:44,164 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:41:44,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-09 16:41:44,220 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 17 statements into 2 equivalence classes. [2025-01-09 16:41:44,245 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 16:41:44,245 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:41:44,245 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:44,247 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-01-09 16:41:44,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:41:44,264 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 [2025-01-09 16:41:44,455 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 87 treesize of output 59 [2025-01-09 16:41:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:41:44,471 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:41:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:41:45,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595090555] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:41:45,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:41:45,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2025-01-09 16:41:45,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848630081] [2025-01-09 16:41:45,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:41:45,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-09 16:41:45,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:41:45,117 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-09 16:41:45,118 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2025-01-09 16:41:45,119 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:41:45,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 430 flow. Second operand has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:45,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:41:45,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:41:45,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:41:45,397 INFO L124 PetriNetUnfolderBase]: 120/227 cut-off events. [2025-01-09 16:41:45,397 INFO L125 PetriNetUnfolderBase]: For 605/605 co-relation queries the response was YES. [2025-01-09 16:41:45,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1116 conditions, 227 events. 120/227 cut-off events. For 605/605 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 741 event pairs, 2 based on Foata normal form. 1/222 useless extension candidates. Maximal degree in co-relation 943. Up to 143 conditions per place. [2025-01-09 16:41:45,399 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 46 selfloop transitions, 27 changer transitions 3/79 dead transitions. [2025-01-09 16:41:45,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 79 transitions, 698 flow [2025-01-09 16:41:45,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 16:41:45,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-01-09 16:41:45,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 94 transitions. [2025-01-09 16:41:45,401 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2025-01-09 16:41:45,401 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 430 flow. Second operand 9 states and 94 transitions. [2025-01-09 16:41:45,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 79 transitions, 698 flow [2025-01-09 16:41:45,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 79 transitions, 623 flow, removed 19 selfloop flow, removed 8 redundant places. [2025-01-09 16:41:45,406 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 487 flow [2025-01-09 16:41:45,406 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=487, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2025-01-09 16:41:45,407 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 44 predicate places. [2025-01-09 16:41:45,407 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 487 flow [2025-01-09 16:41:45,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.0588235294117645) internal successors, (120), 17 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:45,407 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:41:45,407 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:41:45,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-01-09 16:41:45,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-01-09 16:41:45,612 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:41:45,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:41:45,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1954050426, now seen corresponding path program 5 times [2025-01-09 16:41:45,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:41:45,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923062601] [2025-01-09 16:41:45,613 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:41:45,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:41:45,619 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-01-09 16:41:45,642 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 16:41:45,642 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:41:45,642 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:41:46,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:41:46,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923062601] [2025-01-09 16:41:46,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923062601] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:41:46,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381781048] [2025-01-09 16:41:46,139 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:41:46,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:41:46,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:41:46,142 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:41:46,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-01-09 16:41:46,201 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-01-09 16:41:46,225 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 16:41:46,225 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:41:46,225 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:46,227 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-01-09 16:41:46,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:41:46,242 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 [2025-01-09 16:41:46,417 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 87 treesize of output 59 [2025-01-09 16:41:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:41:46,468 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:41:47,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:41:47,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381781048] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:41:47,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:41:47,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2025-01-09 16:41:47,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628374262] [2025-01-09 16:41:47,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:41:47,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-09 16:41:47,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:41:47,128 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-09 16:41:47,128 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2025-01-09 16:41:47,129 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:41:47,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 487 flow. Second operand has 16 states, 16 states have (on average 7.125) internal successors, (114), 16 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:47,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:41:47,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:41:47,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:41:47,330 INFO L124 PetriNetUnfolderBase]: 118/225 cut-off events. [2025-01-09 16:41:47,330 INFO L125 PetriNetUnfolderBase]: For 735/735 co-relation queries the response was YES. [2025-01-09 16:41:47,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1161 conditions, 225 events. 118/225 cut-off events. For 735/735 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 742 event pairs, 1 based on Foata normal form. 1/220 useless extension candidates. Maximal degree in co-relation 1070. Up to 113 conditions per place. [2025-01-09 16:41:47,334 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 40 selfloop transitions, 29 changer transitions 4/76 dead transitions. [2025-01-09 16:41:47,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 76 transitions, 704 flow [2025-01-09 16:41:47,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-09 16:41:47,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-01-09 16:41:47,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 104 transitions. [2025-01-09 16:41:47,335 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2025-01-09 16:41:47,335 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 487 flow. Second operand 11 states and 104 transitions. [2025-01-09 16:41:47,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 76 transitions, 704 flow [2025-01-09 16:41:47,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 76 transitions, 647 flow, removed 9 selfloop flow, removed 5 redundant places. [2025-01-09 16:41:47,343 INFO L231 Difference]: Finished difference. Result has 72 places, 59 transitions, 494 flow [2025-01-09 16:41:47,344 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=494, PETRI_PLACES=72, PETRI_TRANSITIONS=59} [2025-01-09 16:41:47,345 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 51 predicate places. [2025-01-09 16:41:47,345 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 59 transitions, 494 flow [2025-01-09 16:41:47,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.125) internal successors, (114), 16 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:47,345 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:41:47,345 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:41:47,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-01-09 16:41:47,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:41:47,546 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:41:47,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:41:47,547 INFO L85 PathProgramCache]: Analyzing trace with hash -2136729918, now seen corresponding path program 6 times [2025-01-09 16:41:47,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:41:47,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270131163] [2025-01-09 16:41:47,547 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:41:47,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:41:47,553 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 17 statements into 2 equivalence classes. [2025-01-09 16:41:47,573 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 16:41:47,573 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-01-09 16:41:47,573 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:48,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:41:48,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:41:48,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270131163] [2025-01-09 16:41:48,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270131163] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:41:48,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490951196] [2025-01-09 16:41:48,075 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:41:48,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:41:48,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:41:48,077 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:41:48,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-01-09 16:41:48,131 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 17 statements into 2 equivalence classes. [2025-01-09 16:41:48,153 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 16:41:48,153 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-01-09 16:41:48,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:48,155 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-01-09 16:41:48,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:41:48,180 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 [2025-01-09 16:41:48,373 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 87 treesize of output 59 [2025-01-09 16:41:48,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:41:48,431 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:41:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:41:49,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490951196] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:41:49,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:41:49,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2025-01-09 16:41:49,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250774633] [2025-01-09 16:41:49,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:41:49,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-01-09 16:41:49,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:41:49,011 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-01-09 16:41:49,011 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2025-01-09 16:41:49,012 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:41:49,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 59 transitions, 494 flow. Second operand has 19 states, 19 states have (on average 6.894736842105263) internal successors, (131), 19 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:49,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:41:49,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:41:49,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:41:49,474 INFO L124 PetriNetUnfolderBase]: 123/228 cut-off events. [2025-01-09 16:41:49,474 INFO L125 PetriNetUnfolderBase]: For 763/763 co-relation queries the response was YES. [2025-01-09 16:41:49,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1224 conditions, 228 events. 123/228 cut-off events. For 763/763 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 761 event pairs, 0 based on Foata normal form. 1/224 useless extension candidates. Maximal degree in co-relation 1197. Up to 126 conditions per place. [2025-01-09 16:41:49,477 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 49 selfloop transitions, 39 changer transitions 3/94 dead transitions. [2025-01-09 16:41:49,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 94 transitions, 804 flow [2025-01-09 16:41:49,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-01-09 16:41:49,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-01-09 16:41:49,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 164 transitions. [2025-01-09 16:41:49,479 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4823529411764706 [2025-01-09 16:41:49,479 INFO L175 Difference]: Start difference. First operand has 72 places, 59 transitions, 494 flow. Second operand 17 states and 164 transitions. [2025-01-09 16:41:49,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 94 transitions, 804 flow [2025-01-09 16:41:49,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 94 transitions, 730 flow, removed 5 selfloop flow, removed 9 redundant places. [2025-01-09 16:41:49,484 INFO L231 Difference]: Finished difference. Result has 81 places, 63 transitions, 557 flow [2025-01-09 16:41:49,484 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=557, PETRI_PLACES=81, PETRI_TRANSITIONS=63} [2025-01-09 16:41:49,485 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 60 predicate places. [2025-01-09 16:41:49,485 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 63 transitions, 557 flow [2025-01-09 16:41:49,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.894736842105263) internal successors, (131), 19 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:49,485 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:41:49,486 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:41:49,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-01-09 16:41:49,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:41:49,686 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:41:49,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:41:49,687 INFO L85 PathProgramCache]: Analyzing trace with hash -715878165, now seen corresponding path program 7 times [2025-01-09 16:41:49,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:41:49,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217347784] [2025-01-09 16:41:49,687 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 16:41:49,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:41:49,693 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-01-09 16:41:49,698 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:41:49,699 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:41:49,699 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:49,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:41:49,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:41:49,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217347784] [2025-01-09 16:41:49,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217347784] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:41:49,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471515054] [2025-01-09 16:41:49,780 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 16:41:49,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:41:49,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:41:49,782 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:41:49,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-01-09 16:41:49,834 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-01-09 16:41:49,857 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:41:49,857 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:41:49,857 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:49,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-09 16:41:49,861 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:41:49,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:41:49,943 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:41:49,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:41:49,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471515054] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:41:49,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:41:49,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-01-09 16:41:49,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698950319] [2025-01-09 16:41:49,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:41:49,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 16:41:49,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:41:49,993 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 16:41:49,994 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-01-09 16:41:49,994 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:41:49,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 63 transitions, 557 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:49,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:41:49,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:41:49,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:41:50,151 INFO L124 PetriNetUnfolderBase]: 146/284 cut-off events. [2025-01-09 16:41:50,151 INFO L125 PetriNetUnfolderBase]: For 1227/1227 co-relation queries the response was YES. [2025-01-09 16:41:50,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1576 conditions, 284 events. 146/284 cut-off events. For 1227/1227 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1114 event pairs, 33 based on Foata normal form. 14/293 useless extension candidates. Maximal degree in co-relation 1493. Up to 103 conditions per place. [2025-01-09 16:41:50,154 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 73 selfloop transitions, 13 changer transitions 4/93 dead transitions. [2025-01-09 16:41:50,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 93 transitions, 966 flow [2025-01-09 16:41:50,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-09 16:41:50,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-09 16:41:50,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 74 transitions. [2025-01-09 16:41:50,156 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2025-01-09 16:41:50,156 INFO L175 Difference]: Start difference. First operand has 81 places, 63 transitions, 557 flow. Second operand 7 states and 74 transitions. [2025-01-09 16:41:50,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 93 transitions, 966 flow [2025-01-09 16:41:50,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 93 transitions, 827 flow, removed 14 selfloop flow, removed 15 redundant places. [2025-01-09 16:41:50,161 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 518 flow [2025-01-09 16:41:50,161 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=518, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2025-01-09 16:41:50,162 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 54 predicate places. [2025-01-09 16:41:50,162 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 518 flow [2025-01-09 16:41:50,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:50,162 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:41:50,162 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:41:50,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-01-09 16:41:50,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:41:50,367 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:41:50,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:41:50,367 INFO L85 PathProgramCache]: Analyzing trace with hash 604407514, now seen corresponding path program 8 times [2025-01-09 16:41:50,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:41:50,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051092981] [2025-01-09 16:41:50,368 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:41:50,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:41:50,374 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:41:50,380 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:41:50,380 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:41:50,380 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:41:50,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:41:50,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051092981] [2025-01-09 16:41:50,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051092981] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:41:50,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701671279] [2025-01-09 16:41:50,468 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:41:50,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:41:50,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:41:50,471 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:41:50,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-01-09 16:41:50,522 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:41:50,545 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:41:50,545 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:41:50,545 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:50,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-09 16:41:50,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:41:50,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:41:50,618 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:41:50,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:41:50,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701671279] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:41:50,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:41:50,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-01-09 16:41:50,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745063577] [2025-01-09 16:41:50,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:41:50,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 16:41:50,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:41:50,666 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 16:41:50,666 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-01-09 16:41:50,667 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:41:50,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 518 flow. Second operand has 12 states, 12 states have (on average 7.5) internal successors, (90), 12 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:50,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:41:50,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:41:50,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:41:50,803 INFO L124 PetriNetUnfolderBase]: 113/231 cut-off events. [2025-01-09 16:41:50,803 INFO L125 PetriNetUnfolderBase]: For 866/866 co-relation queries the response was YES. [2025-01-09 16:41:50,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1197 conditions, 231 events. 113/231 cut-off events. For 866/866 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 900 event pairs, 38 based on Foata normal form. 15/245 useless extension candidates. Maximal degree in co-relation 1149. Up to 138 conditions per place. [2025-01-09 16:41:50,805 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 47 selfloop transitions, 7 changer transitions 18/75 dead transitions. [2025-01-09 16:41:50,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 75 transitions, 709 flow [2025-01-09 16:41:50,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-09 16:41:50,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-09 16:41:50,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 70 transitions. [2025-01-09 16:41:50,807 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-01-09 16:41:50,807 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 518 flow. Second operand 7 states and 70 transitions. [2025-01-09 16:41:50,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 75 transitions, 709 flow [2025-01-09 16:41:50,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 75 transitions, 690 flow, removed 4 selfloop flow, removed 5 redundant places. [2025-01-09 16:41:50,812 INFO L231 Difference]: Finished difference. Result has 76 places, 52 transitions, 399 flow [2025-01-09 16:41:50,812 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=399, PETRI_PLACES=76, PETRI_TRANSITIONS=52} [2025-01-09 16:41:50,812 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 55 predicate places. [2025-01-09 16:41:50,814 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 52 transitions, 399 flow [2025-01-09 16:41:50,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.5) internal successors, (90), 12 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:50,814 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:41:50,814 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:41:50,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-01-09 16:41:51,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-01-09 16:41:51,015 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:41:51,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:41:51,015 INFO L85 PathProgramCache]: Analyzing trace with hash -256596648, now seen corresponding path program 9 times [2025-01-09 16:41:51,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:41:51,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572670512] [2025-01-09 16:41:51,015 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:41:51,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:41:51,022 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-01-09 16:41:51,028 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-01-09 16:41:51,029 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:41:51,029 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 16:41:51,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:41:51,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572670512] [2025-01-09 16:41:51,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572670512] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:41:51,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529043317] [2025-01-09 16:41:51,130 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:41:51,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:41:51,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:41:51,133 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:41:51,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-01-09 16:41:51,190 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-01-09 16:41:51,213 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-01-09 16:41:51,213 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:41:51,213 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:51,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-09 16:41:51,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:41:51,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 16:41:51,287 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:41:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 16:41:51,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529043317] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:41:51,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:41:51,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-01-09 16:41:51,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711018788] [2025-01-09 16:41:51,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:41:51,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-09 16:41:51,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:41:51,347 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-09 16:41:51,347 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2025-01-09 16:41:51,347 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:41:51,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 52 transitions, 399 flow. Second operand has 14 states, 14 states have (on average 7.0) internal successors, (98), 14 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:51,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:41:51,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:41:51,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:41:51,461 INFO L124 PetriNetUnfolderBase]: 88/159 cut-off events. [2025-01-09 16:41:51,461 INFO L125 PetriNetUnfolderBase]: For 893/893 co-relation queries the response was YES. [2025-01-09 16:41:51,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 893 conditions, 159 events. 88/159 cut-off events. For 893/893 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 452 event pairs, 6 based on Foata normal form. 12/170 useless extension candidates. Maximal degree in co-relation 848. Up to 97 conditions per place. [2025-01-09 16:41:51,465 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 38 selfloop transitions, 15 changer transitions 0/56 dead transitions. [2025-01-09 16:41:51,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 56 transitions, 528 flow [2025-01-09 16:41:51,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-09 16:41:51,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-01-09 16:41:51,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 69 transitions. [2025-01-09 16:41:51,467 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43125 [2025-01-09 16:41:51,467 INFO L175 Difference]: Start difference. First operand has 76 places, 52 transitions, 399 flow. Second operand 8 states and 69 transitions. [2025-01-09 16:41:51,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 56 transitions, 528 flow [2025-01-09 16:41:51,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 56 transitions, 440 flow, removed 26 selfloop flow, removed 11 redundant places. [2025-01-09 16:41:51,471 INFO L231 Difference]: Finished difference. Result has 62 places, 46 transitions, 329 flow [2025-01-09 16:41:51,471 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=329, PETRI_PLACES=62, PETRI_TRANSITIONS=46} [2025-01-09 16:41:51,471 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 41 predicate places. [2025-01-09 16:41:51,471 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 46 transitions, 329 flow [2025-01-09 16:41:51,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.0) internal successors, (98), 14 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:51,471 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:41:51,471 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:41:51,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-01-09 16:41:51,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-01-09 16:41:51,676 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:41:51,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:41:51,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1217737549, now seen corresponding path program 10 times [2025-01-09 16:41:51,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:41:51,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985276891] [2025-01-09 16:41:51,678 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:41:51,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:41:51,685 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-01-09 16:41:51,692 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-01-09 16:41:51,692 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:41:51,692 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:41:51,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:41:51,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985276891] [2025-01-09 16:41:51,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985276891] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:41:51,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614618528] [2025-01-09 16:41:51,819 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:41:51,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:41:51,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:41:51,821 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:41:51,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-01-09 16:41:51,875 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 19 statements into 2 equivalence classes. [2025-01-09 16:41:51,898 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-01-09 16:41:51,899 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:41:51,899 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:51,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-09 16:41:51,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:41:51,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:41:51,975 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:41:52,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:41:52,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614618528] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:41:52,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:41:52,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-01-09 16:41:52,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685644920] [2025-01-09 16:41:52,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:41:52,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-09 16:41:52,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:41:52,048 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-09 16:41:52,048 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2025-01-09 16:41:52,048 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:41:52,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 46 transitions, 329 flow. Second operand has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:52,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:41:52,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:41:52,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:41:52,187 INFO L124 PetriNetUnfolderBase]: 85/154 cut-off events. [2025-01-09 16:41:52,187 INFO L125 PetriNetUnfolderBase]: For 747/747 co-relation queries the response was YES. [2025-01-09 16:41:52,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 815 conditions, 154 events. 85/154 cut-off events. For 747/747 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 412 event pairs, 18 based on Foata normal form. 11/164 useless extension candidates. Maximal degree in co-relation 779. Up to 57 conditions per place. [2025-01-09 16:41:52,189 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 31 selfloop transitions, 14 changer transitions 0/48 dead transitions. [2025-01-09 16:41:52,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 48 transitions, 448 flow [2025-01-09 16:41:52,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-09 16:41:52,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-01-09 16:41:52,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 67 transitions. [2025-01-09 16:41:52,190 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41875 [2025-01-09 16:41:52,190 INFO L175 Difference]: Start difference. First operand has 62 places, 46 transitions, 329 flow. Second operand 8 states and 67 transitions. [2025-01-09 16:41:52,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 48 transitions, 448 flow [2025-01-09 16:41:52,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 48 transitions, 395 flow, removed 18 selfloop flow, removed 10 redundant places. [2025-01-09 16:41:52,193 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 285 flow [2025-01-09 16:41:52,193 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=285, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2025-01-09 16:41:52,193 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 35 predicate places. [2025-01-09 16:41:52,195 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 285 flow [2025-01-09 16:41:52,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 14 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:41:52,196 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:41:52,196 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:41:52,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-01-09 16:41:52,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:41:52,400 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:41:52,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:41:52,400 INFO L85 PathProgramCache]: Analyzing trace with hash 2124593125, now seen corresponding path program 11 times [2025-01-09 16:41:52,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:41:52,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671851790] [2025-01-09 16:41:52,401 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:41:52,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:41:52,410 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-01-09 16:41:52,468 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:41:52,469 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:41:52,469 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:54,201 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:41:54,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:41:54,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671851790] [2025-01-09 16:41:54,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671851790] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:41:54,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350500018] [2025-01-09 16:41:54,201 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:41:54,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:41:54,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:41:54,204 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:41:54,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-01-09 16:41:54,251 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-01-09 16:41:54,281 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:41:54,281 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:41:54,281 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:41:54,283 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-01-09 16:41:54,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:41:54,841 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 16:41:54,841 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 230 treesize of output 140 [2025-01-09 16:41:54,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:41:54,967 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:41:56,671 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2025-01-09 16:41:56,671 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 947 treesize of output 413 [2025-01-09 16:42:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:42:03,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350500018] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:42:03,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:42:03,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 24 [2025-01-09 16:42:03,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137220627] [2025-01-09 16:42:03,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:42:03,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-01-09 16:42:03,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:42:03,716 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-01-09 16:42:03,717 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2025-01-09 16:42:03,717 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:42:03,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 285 flow. Second operand has 24 states, 24 states have (on average 6.833333333333333) internal successors, (164), 24 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:42:03,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:42:03,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:42:03,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:42:05,403 INFO L124 PetriNetUnfolderBase]: 164/307 cut-off events. [2025-01-09 16:42:05,403 INFO L125 PetriNetUnfolderBase]: For 889/889 co-relation queries the response was YES. [2025-01-09 16:42:05,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1627 conditions, 307 events. 164/307 cut-off events. For 889/889 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1044 event pairs, 1 based on Foata normal form. 1/307 useless extension candidates. Maximal degree in co-relation 1585. Up to 110 conditions per place. [2025-01-09 16:42:05,407 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 68 selfloop transitions, 58 changer transitions 7/136 dead transitions. [2025-01-09 16:42:05,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 136 transitions, 1140 flow [2025-01-09 16:42:05,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-01-09 16:42:05,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-01-09 16:42:05,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 261 transitions. [2025-01-09 16:42:05,408 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45 [2025-01-09 16:42:05,408 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 285 flow. Second operand 29 states and 261 transitions. [2025-01-09 16:42:05,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 136 transitions, 1140 flow [2025-01-09 16:42:05,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 136 transitions, 1064 flow, removed 30 selfloop flow, removed 5 redundant places. [2025-01-09 16:42:05,413 INFO L231 Difference]: Finished difference. Result has 82 places, 79 transitions, 769 flow [2025-01-09 16:42:05,414 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=769, PETRI_PLACES=82, PETRI_TRANSITIONS=79} [2025-01-09 16:42:05,414 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 61 predicate places. [2025-01-09 16:42:05,414 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 79 transitions, 769 flow [2025-01-09 16:42:05,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.833333333333333) internal successors, (164), 24 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:42:05,415 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:42:05,415 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:42:05,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-01-09 16:42:05,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:42:05,616 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:42:05,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:42:05,617 INFO L85 PathProgramCache]: Analyzing trace with hash 387137091, now seen corresponding path program 12 times [2025-01-09 16:42:05,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:42:05,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534338122] [2025-01-09 16:42:05,617 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:42:05,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:42:05,625 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 2 equivalence classes. [2025-01-09 16:42:05,699 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:42:05,699 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-01-09 16:42:05,699 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:42:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:42:07,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:42:07,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534338122] [2025-01-09 16:42:07,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534338122] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:42:07,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183003326] [2025-01-09 16:42:07,406 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:42:07,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:42:07,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:42:07,410 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:42:07,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-01-09 16:42:07,465 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 2 equivalence classes. [2025-01-09 16:42:07,506 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:42:07,506 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-01-09 16:42:07,506 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:42:07,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-01-09 16:42:07,510 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:42:07,929 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 16:42:07,929 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 257 treesize of output 161 [2025-01-09 16:42:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:42:08,099 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:42:08,876 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 16:42:08,877 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 947 treesize of output 423 [2025-01-09 16:42:16,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:42:16,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183003326] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:42:16,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:42:16,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 25 [2025-01-09 16:42:16,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616603438] [2025-01-09 16:42:16,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:42:16,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-01-09 16:42:16,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:42:16,798 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-01-09 16:42:16,798 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2025-01-09 16:42:16,798 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:42:16,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 79 transitions, 769 flow. Second operand has 25 states, 25 states have (on average 6.8) internal successors, (170), 25 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:42:16,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:42:16,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:42:16,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:42:17,916 INFO L124 PetriNetUnfolderBase]: 292/523 cut-off events. [2025-01-09 16:42:17,916 INFO L125 PetriNetUnfolderBase]: For 1660/1660 co-relation queries the response was YES. [2025-01-09 16:42:17,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2991 conditions, 523 events. 292/523 cut-off events. For 1660/1660 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2107 event pairs, 0 based on Foata normal form. 1/523 useless extension candidates. Maximal degree in co-relation 2952. Up to 321 conditions per place. [2025-01-09 16:42:17,921 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 106 selfloop transitions, 80 changer transitions 5/194 dead transitions. [2025-01-09 16:42:17,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 194 transitions, 1995 flow [2025-01-09 16:42:17,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-01-09 16:42:17,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-01-09 16:42:17,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 275 transitions. [2025-01-09 16:42:17,923 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2025-01-09 16:42:17,923 INFO L175 Difference]: Start difference. First operand has 82 places, 79 transitions, 769 flow. Second operand 28 states and 275 transitions. [2025-01-09 16:42:17,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 194 transitions, 1995 flow [2025-01-09 16:42:17,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 194 transitions, 1504 flow, removed 214 selfloop flow, removed 11 redundant places. [2025-01-09 16:42:17,933 INFO L231 Difference]: Finished difference. Result has 100 places, 137 transitions, 1173 flow [2025-01-09 16:42:17,933 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1173, PETRI_PLACES=100, PETRI_TRANSITIONS=137} [2025-01-09 16:42:17,933 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 79 predicate places. [2025-01-09 16:42:17,933 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 137 transitions, 1173 flow [2025-01-09 16:42:17,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.8) internal successors, (170), 25 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:42:17,934 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:42:17,934 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:42:17,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-01-09 16:42:18,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-01-09 16:42:18,135 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:42:18,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:42:18,135 INFO L85 PathProgramCache]: Analyzing trace with hash 767237865, now seen corresponding path program 13 times [2025-01-09 16:42:18,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:42:18,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774195299] [2025-01-09 16:42:18,135 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 16:42:18,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:42:18,140 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-01-09 16:42:18,169 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:42:18,169 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:42:18,169 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:42:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:42:19,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:42:19,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774195299] [2025-01-09 16:42:19,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774195299] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:42:19,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662333025] [2025-01-09 16:42:19,127 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 16:42:19,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:42:19,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:42:19,129 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:42:19,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-01-09 16:42:19,186 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-01-09 16:42:19,211 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:42:19,211 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:42:19,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:42:19,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-01-09 16:42:19,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:42:19,659 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 16:42:19,660 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 220 treesize of output 142 [2025-01-09 16:42:19,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:42:19,831 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:42:20,764 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 16:42:20,764 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 947 treesize of output 423 [2025-01-09 16:42:29,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:42:29,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662333025] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:42:29,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:42:29,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2025-01-09 16:42:29,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199259939] [2025-01-09 16:42:29,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:42:29,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-01-09 16:42:29,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:42:29,528 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-01-09 16:42:29,528 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2025-01-09 16:42:29,528 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:42:29,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 137 transitions, 1173 flow. Second operand has 26 states, 26 states have (on average 6.653846153846154) internal successors, (173), 26 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:42:29,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:42:29,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:42:29,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:42:30,668 INFO L124 PetriNetUnfolderBase]: 301/543 cut-off events. [2025-01-09 16:42:30,668 INFO L125 PetriNetUnfolderBase]: For 1140/1140 co-relation queries the response was YES. [2025-01-09 16:42:30,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2727 conditions, 543 events. 301/543 cut-off events. For 1140/1140 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2243 event pairs, 3 based on Foata normal form. 1/536 useless extension candidates. Maximal degree in co-relation 2690. Up to 383 conditions per place. [2025-01-09 16:42:30,673 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 95 selfloop transitions, 75 changer transitions 4/177 dead transitions. [2025-01-09 16:42:30,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 177 transitions, 1703 flow [2025-01-09 16:42:30,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-01-09 16:42:30,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-01-09 16:42:30,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 190 transitions. [2025-01-09 16:42:30,675 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2025-01-09 16:42:30,676 INFO L175 Difference]: Start difference. First operand has 100 places, 137 transitions, 1173 flow. Second operand 21 states and 190 transitions. [2025-01-09 16:42:30,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 177 transitions, 1703 flow [2025-01-09 16:42:30,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 177 transitions, 1405 flow, removed 128 selfloop flow, removed 10 redundant places. [2025-01-09 16:42:30,686 INFO L231 Difference]: Finished difference. Result has 114 places, 148 transitions, 1191 flow [2025-01-09 16:42:30,687 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=899, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1191, PETRI_PLACES=114, PETRI_TRANSITIONS=148} [2025-01-09 16:42:30,688 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 93 predicate places. [2025-01-09 16:42:30,688 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 148 transitions, 1191 flow [2025-01-09 16:42:30,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.653846153846154) internal successors, (173), 26 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:42:30,688 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:42:30,688 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:42:30,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-01-09 16:42:30,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-01-09 16:42:30,889 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:42:30,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:42:30,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1548952531, now seen corresponding path program 14 times [2025-01-09 16:42:30,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:42:30,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506380770] [2025-01-09 16:42:30,890 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:42:30,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:42:30,897 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-01-09 16:42:30,924 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:42:30,924 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:42:30,924 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:42:31,910 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:42:31,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:42:31,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506380770] [2025-01-09 16:42:31,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506380770] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:42:31,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909648606] [2025-01-09 16:42:31,911 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:42:31,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:42:31,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:42:31,914 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:42:31,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-01-09 16:42:31,975 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-01-09 16:42:32,011 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:42:32,011 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:42:32,011 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:42:32,018 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-01-09 16:42:32,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:42:32,635 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 16:42:32,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 228 treesize of output 140 [2025-01-09 16:42:32,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:42:32,750 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:42:33,515 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 16:42:33,515 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 947 treesize of output 423 [2025-01-09 16:42:40,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:42:40,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909648606] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:42:40,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:42:40,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 24 [2025-01-09 16:42:40,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376823831] [2025-01-09 16:42:40,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:42:40,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-01-09 16:42:40,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:42:40,894 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-01-09 16:42:40,894 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2025-01-09 16:42:40,894 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2025-01-09 16:42:40,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 148 transitions, 1191 flow. Second operand has 24 states, 24 states have (on average 6.791666666666667) internal successors, (163), 24 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:42:40,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:42:40,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2025-01-09 16:42:40,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:42:42,317 INFO L124 PetriNetUnfolderBase]: 370/662 cut-off events. [2025-01-09 16:42:42,318 INFO L125 PetriNetUnfolderBase]: For 1253/1253 co-relation queries the response was YES. [2025-01-09 16:42:42,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3294 conditions, 662 events. 370/662 cut-off events. For 1253/1253 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2893 event pairs, 2 based on Foata normal form. 1/648 useless extension candidates. Maximal degree in co-relation 3254. Up to 410 conditions per place. [2025-01-09 16:42:42,323 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 144 selfloop transitions, 88 changer transitions 4/239 dead transitions. [2025-01-09 16:42:42,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 239 transitions, 2175 flow [2025-01-09 16:42:42,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-01-09 16:42:42,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-01-09 16:42:42,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 273 transitions. [2025-01-09 16:42:42,324 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4706896551724138 [2025-01-09 16:42:42,324 INFO L175 Difference]: Start difference. First operand has 114 places, 148 transitions, 1191 flow. Second operand 29 states and 273 transitions. [2025-01-09 16:42:42,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 239 transitions, 2175 flow [2025-01-09 16:42:42,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 239 transitions, 2055 flow, removed 12 selfloop flow, removed 17 redundant places. [2025-01-09 16:42:42,333 INFO L231 Difference]: Finished difference. Result has 132 places, 183 transitions, 1694 flow [2025-01-09 16:42:42,333 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1088, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1694, PETRI_PLACES=132, PETRI_TRANSITIONS=183} [2025-01-09 16:42:42,334 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 111 predicate places. [2025-01-09 16:42:42,334 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 183 transitions, 1694 flow [2025-01-09 16:42:42,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.791666666666667) internal successors, (163), 24 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:42:42,334 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:42:42,334 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:42:42,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-01-09 16:42:42,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:42:42,535 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:42:42,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:42:42,536 INFO L85 PathProgramCache]: Analyzing trace with hash 306020747, now seen corresponding path program 15 times [2025-01-09 16:42:42,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:42:42,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441544482] [2025-01-09 16:42:42,536 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:42:42,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:42:42,541 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-01-09 16:42:42,570 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:42:42,571 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:42:42,571 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:42:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:42:43,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:42:43,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441544482] [2025-01-09 16:42:43,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441544482] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:42:43,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587533189] [2025-01-09 16:42:43,499 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:42:43,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:42:43,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:42:43,501 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 16:42:43,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-01-09 16:42:43,551 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-01-09 16:42:43,577 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-01-09 16:42:43,577 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:42:43,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:42:43,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-01-09 16:42:43,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:42:44,168 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 16:42:44,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 223 treesize of output 143 [2025-01-09 16:42:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:42:44,262 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:42:45,370 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 16:42:45,370 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 940 treesize of output 442