./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-cond-3.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/unroll-cond-3.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 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 16:50:00,405 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 16:50:00,459 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 16:50:00,463 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 16:50:00,464 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 16:50:00,482 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 16:50:00,483 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 16:50:00,483 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 16:50:00,484 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 16:50:00,484 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 16:50:00,484 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 16:50:00,484 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 16:50:00,484 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 16:50:00,484 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 16:50:00,485 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 16:50:00,485 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 16:50:00,485 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 16:50:00,485 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 16:50:00,485 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 16:50:00,485 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 16:50:00,485 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 16:50:00,485 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 16:50:00,486 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 16:50:00,486 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 16:50:00,486 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 16:50:00,486 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 16:50:00,486 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 16:50:00,486 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 16:50:00,486 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 16:50:00,486 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 16:50:00,487 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 16:50:00,487 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 16:50:00,487 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:50:00,487 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 16:50:00,487 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 16:50:00,487 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 16:50:00,487 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 16:50:00,487 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:50:00,488 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 16:50:00,488 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 16:50:00,488 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 16:50:00,488 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 16:50:00,488 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 16:50:00,488 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 16:50:00,488 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 16:50:00,489 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 16:50:00,489 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 16:50:00,489 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 16:50:00,489 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 -> 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 [2025-01-09 16:50:00,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 16:50:00,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 16:50:00,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 16:50:00,759 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 16:50:00,760 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 16:50:00,761 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2025-01-09 16:50:02,025 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b120ae43a/9f2a3e1fbf2a46a58fd9d3757f914c5c/FLAG23cb091f3 [2025-01-09 16:50:02,350 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 16:50:02,351 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2025-01-09 16:50:02,361 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b120ae43a/9f2a3e1fbf2a46a58fd9d3757f914c5c/FLAG23cb091f3 [2025-01-09 16:50:02,377 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b120ae43a/9f2a3e1fbf2a46a58fd9d3757f914c5c [2025-01-09 16:50:02,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 16:50:02,381 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 16:50:02,383 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 16:50:02,383 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 16:50:02,386 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 16:50:02,387 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:50:02" (1/1) ... [2025-01-09 16:50:02,388 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19211522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:50:02, skipping insertion in model container [2025-01-09 16:50:02,388 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:50:02" (1/1) ... [2025-01-09 16:50:02,405 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 16:50:02,563 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/unroll-cond-3.wvr.c[2667,2680] [2025-01-09 16:50:02,574 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 16:50:02,583 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 16:50:02,606 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/unroll-cond-3.wvr.c[2667,2680] [2025-01-09 16:50:02,612 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 16:50:02,627 INFO L204 MainTranslator]: Completed translation [2025-01-09 16:50:02,629 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:50:02 WrapperNode [2025-01-09 16:50:02,629 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 16:50:02,630 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 16:50:02,631 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 16:50:02,631 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 16:50:02,636 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:50:02" (1/1) ... [2025-01-09 16:50:02,647 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:50:02" (1/1) ... [2025-01-09 16:50:02,671 INFO L138 Inliner]: procedures = 23, calls = 27, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 146 [2025-01-09 16:50:02,672 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 16:50:02,672 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 16:50:02,672 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 16:50:02,673 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 16:50:02,681 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:50:02" (1/1) ... [2025-01-09 16:50:02,681 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:50:02" (1/1) ... [2025-01-09 16:50:02,684 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:50:02" (1/1) ... [2025-01-09 16:50:02,698 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 16:50:02,698 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:50:02" (1/1) ... [2025-01-09 16:50:02,698 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:50:02" (1/1) ... [2025-01-09 16:50:02,704 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:50:02" (1/1) ... [2025-01-09 16:50:02,705 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:50:02" (1/1) ... [2025-01-09 16:50:02,707 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:50:02" (1/1) ... [2025-01-09 16:50:02,708 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:50:02" (1/1) ... [2025-01-09 16:50:02,709 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:50:02" (1/1) ... [2025-01-09 16:50:02,711 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 16:50:02,716 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 16:50:02,716 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 16:50:02,717 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 16:50:02,717 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:50:02" (1/1) ... [2025-01-09 16:50:02,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:50:02,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:50:02,746 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 16:50:02,748 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 16:50:02,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 16:50:02,764 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-01-09 16:50:02,764 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-01-09 16:50:02,764 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-01-09 16:50:02,764 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-01-09 16:50:02,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 16:50:02,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-09 16:50:02,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-09 16:50:02,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-09 16:50:02,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-09 16:50:02,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 16:50:02,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 16:50:02,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-09 16:50:02,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-09 16:50:02,765 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 16:50:02,850 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 16:50:02,852 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 16:50:03,128 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-09 16:50:03,129 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 16:50:03,377 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 16:50:03,377 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-09 16:50:03,378 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:50:03 BoogieIcfgContainer [2025-01-09 16:50:03,378 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 16:50:03,380 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 16:50:03,380 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 16:50:03,384 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 16:50:03,385 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 04:50:02" (1/3) ... [2025-01-09 16:50:03,385 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4559032a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:50:03, skipping insertion in model container [2025-01-09 16:50:03,385 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:50:02" (2/3) ... [2025-01-09 16:50:03,386 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4559032a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:50:03, skipping insertion in model container [2025-01-09 16:50:03,387 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:50:03" (3/3) ... [2025-01-09 16:50:03,388 INFO L128 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2025-01-09 16:50:03,401 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 16:50:03,403 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-cond-3.wvr.c that has 3 procedures, 18 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-01-09 16:50:03,403 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-09 16:50:03,466 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-01-09 16:50:03,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2025-01-09 16:50:03,547 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2025-01-09 16:50:03,549 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-09 16:50:03,552 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 3. Compared 12 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 16:50:03,555 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2025-01-09 16:50:03,557 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2025-01-09 16:50:03,566 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 16:50:03,576 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;@1d1efc2a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 16:50:03,576 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-01-09 16:50:03,582 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-09 16:50:03,584 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2025-01-09 16:50:03,585 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-09 16:50:03,585 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:03,585 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:50:03,585 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 16:50:03,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:03,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1464823228, now seen corresponding path program 1 times [2025-01-09 16:50:03,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:03,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935458874] [2025-01-09 16:50:03,598 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:50:03,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:03,675 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-09 16:50:03,724 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-09 16:50:03,725 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:50:03,725 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:03,968 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 16:50:03,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:03,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935458874] [2025-01-09 16:50:03,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935458874] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:50:03,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:50:03,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 16:50:03,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794317043] [2025-01-09 16:50:03,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:50:03,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 16:50:03,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:04,002 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 16:50:04,002 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 16:50:04,003 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:04,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 16:50:04,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:04,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:04,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:04,080 INFO L124 PetriNetUnfolderBase]: 38/71 cut-off events. [2025-01-09 16:50:04,081 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-01-09 16:50:04,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 71 events. 38/71 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 121 event pairs, 22 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 120. Up to 70 conditions per place. [2025-01-09 16:50:04,083 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 15 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2025-01-09 16:50:04,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 82 flow [2025-01-09 16:50:04,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 16:50:04,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-09 16:50:04,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2025-01-09 16:50:04,099 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45 [2025-01-09 16:50:04,100 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 27 transitions. [2025-01-09 16:50:04,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 82 flow [2025-01-09 16:50:04,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 74 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-09 16:50:04,108 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2025-01-09 16:50:04,110 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=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2025-01-09 16:50:04,113 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2025-01-09 16:50:04,114 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2025-01-09 16:50:04,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 16:50:04,115 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:04,115 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:50:04,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 16:50:04,115 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 16:50:04,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:04,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1433227399, now seen corresponding path program 1 times [2025-01-09 16:50:04,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:04,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985356097] [2025-01-09 16:50:04,117 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:50:04,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:04,135 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-09 16:50:04,182 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-09 16:50:04,183 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:50:04,183 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:04,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:50:04,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:04,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985356097] [2025-01-09 16:50:04,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985356097] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:50:04,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:50:04,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 16:50:04,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108945168] [2025-01-09 16:50:04,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:50:04,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 16:50:04,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:04,597 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 16:50:04,597 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-01-09 16:50:04,597 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:04,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 16:50:04,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:04,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:04,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:04,803 INFO L124 PetriNetUnfolderBase]: 68/120 cut-off events. [2025-01-09 16:50:04,804 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-01-09 16:50:04,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 120 events. 68/120 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 308 event pairs, 1 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 243. Up to 80 conditions per place. [2025-01-09 16:50:04,807 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 30 selfloop transitions, 12 changer transitions 0/43 dead transitions. [2025-01-09 16:50:04,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 43 transitions, 189 flow [2025-01-09 16:50:04,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 16:50:04,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-09 16:50:04,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2025-01-09 16:50:04,809 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-01-09 16:50:04,809 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 6 states and 60 transitions. [2025-01-09 16:50:04,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 43 transitions, 189 flow [2025-01-09 16:50:04,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 43 transitions, 185 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-01-09 16:50:04,812 INFO L231 Difference]: Finished difference. Result has 27 places, 29 transitions, 117 flow [2025-01-09 16:50:04,813 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=27, PETRI_TRANSITIONS=29} [2025-01-09 16:50:04,813 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 6 predicate places. [2025-01-09 16:50:04,814 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 29 transitions, 117 flow [2025-01-09 16:50:04,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 16:50:04,815 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:04,815 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:50:04,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-09 16:50:04,815 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 16:50:04,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:04,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1899227775, now seen corresponding path program 2 times [2025-01-09 16:50:04,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:04,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071046473] [2025-01-09 16:50:04,817 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:50:04,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:04,831 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-01-09 16:50:04,863 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 14 of 15 statements. [2025-01-09 16:50:04,864 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-09 16:50:04,864 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:05,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:50:05,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:05,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071046473] [2025-01-09 16:50:05,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071046473] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:50:05,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:50:05,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 16:50:05,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865935891] [2025-01-09 16:50:05,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:50:05,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 16:50:05,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:05,137 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 16:50:05,137 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2025-01-09 16:50:05,138 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:05,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 29 transitions, 117 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 16:50:05,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:05,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:05,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:05,290 INFO L124 PetriNetUnfolderBase]: 77/134 cut-off events. [2025-01-09 16:50:05,290 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2025-01-09 16:50:05,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 134 events. 77/134 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 332 event pairs, 9 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 403. Up to 89 conditions per place. [2025-01-09 16:50:05,293 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 28 selfloop transitions, 18 changer transitions 0/47 dead transitions. [2025-01-09 16:50:05,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 47 transitions, 278 flow [2025-01-09 16:50:05,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 16:50:05,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-09 16:50:05,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 58 transitions. [2025-01-09 16:50:05,295 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2025-01-09 16:50:05,295 INFO L175 Difference]: Start difference. First operand has 27 places, 29 transitions, 117 flow. Second operand 6 states and 58 transitions. [2025-01-09 16:50:05,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 47 transitions, 278 flow [2025-01-09 16:50:05,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 47 transitions, 270 flow, removed 4 selfloop flow, removed 0 redundant places. [2025-01-09 16:50:05,296 INFO L231 Difference]: Finished difference. Result has 35 places, 37 transitions, 212 flow [2025-01-09 16:50:05,297 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=35, PETRI_TRANSITIONS=37} [2025-01-09 16:50:05,297 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2025-01-09 16:50:05,297 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 37 transitions, 212 flow [2025-01-09 16:50:05,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 16:50:05,297 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:05,299 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:50:05,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-09 16:50:05,300 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 16:50:05,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:05,301 INFO L85 PathProgramCache]: Analyzing trace with hash -113045249, now seen corresponding path program 3 times [2025-01-09 16:50:05,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:05,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396493627] [2025-01-09 16:50:05,301 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:50:05,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:05,311 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-01-09 16:50:05,337 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 14 of 15 statements. [2025-01-09 16:50:05,340 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-01-09 16:50:05,340 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:50:05,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:05,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396493627] [2025-01-09 16:50:05,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396493627] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:50:05,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:50:05,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 16:50:05,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363840971] [2025-01-09 16:50:05,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:50:05,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 16:50:05,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:05,516 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 16:50:05,516 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-01-09 16:50:05,516 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:05,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 37 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 16:50:05,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:05,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:05,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:05,647 INFO L124 PetriNetUnfolderBase]: 91/169 cut-off events. [2025-01-09 16:50:05,649 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2025-01-09 16:50:05,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 169 events. 91/169 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 479 event pairs, 20 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 578. Up to 82 conditions per place. [2025-01-09 16:50:05,653 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 40 selfloop transitions, 15 changer transitions 0/56 dead transitions. [2025-01-09 16:50:05,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 56 transitions, 388 flow [2025-01-09 16:50:05,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 16:50:05,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-09 16:50:05,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 54 transitions. [2025-01-09 16:50:05,655 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.54 [2025-01-09 16:50:05,655 INFO L175 Difference]: Start difference. First operand has 35 places, 37 transitions, 212 flow. Second operand 5 states and 54 transitions. [2025-01-09 16:50:05,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 56 transitions, 388 flow [2025-01-09 16:50:05,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 364 flow, removed 5 selfloop flow, removed 1 redundant places. [2025-01-09 16:50:05,658 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 254 flow [2025-01-09 16:50:05,658 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2025-01-09 16:50:05,659 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2025-01-09 16:50:05,659 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 254 flow [2025-01-09 16:50:05,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 16:50:05,659 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:05,660 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:50:05,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-01-09 16:50:05,660 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 16:50:05,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:05,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1186435263, now seen corresponding path program 4 times [2025-01-09 16:50:05,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:05,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392192894] [2025-01-09 16:50:05,661 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:50:05,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:05,670 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-01-09 16:50:05,694 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-01-09 16:50:05,694 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:50:05,694 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:50:06,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:06,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392192894] [2025-01-09 16:50:06,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392192894] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:50:06,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:50:06,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 16:50:06,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984470733] [2025-01-09 16:50:06,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:50:06,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 16:50:06,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:06,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 16:50:06,096 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-01-09 16:50:06,096 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:06,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 254 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 16:50:06,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:06,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:06,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:06,740 INFO L124 PetriNetUnfolderBase]: 89/161 cut-off events. [2025-01-09 16:50:06,740 INFO L125 PetriNetUnfolderBase]: For 241/241 co-relation queries the response was YES. [2025-01-09 16:50:06,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614 conditions, 161 events. 89/161 cut-off events. For 241/241 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 444 event pairs, 7 based on Foata normal form. 3/151 useless extension candidates. Maximal degree in co-relation 588. Up to 115 conditions per place. [2025-01-09 16:50:06,743 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 32 selfloop transitions, 18 changer transitions 0/51 dead transitions. [2025-01-09 16:50:06,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 51 transitions, 379 flow [2025-01-09 16:50:06,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 16:50:06,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-09 16:50:06,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2025-01-09 16:50:06,744 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-01-09 16:50:06,744 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 254 flow. Second operand 6 states and 60 transitions. [2025-01-09 16:50:06,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 51 transitions, 379 flow [2025-01-09 16:50:06,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 51 transitions, 375 flow, removed 2 selfloop flow, removed 0 redundant places. [2025-01-09 16:50:06,750 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 293 flow [2025-01-09 16:50:06,751 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=293, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2025-01-09 16:50:06,751 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2025-01-09 16:50:06,752 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 293 flow [2025-01-09 16:50:06,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 16:50:06,753 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:06,753 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:50:06,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-01-09 16:50:06,753 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 16:50:06,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:06,754 INFO L85 PathProgramCache]: Analyzing trace with hash 2004986999, now seen corresponding path program 5 times [2025-01-09 16:50:06,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:06,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334976414] [2025-01-09 16:50:06,755 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:50:06,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:06,766 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-01-09 16:50:06,782 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-01-09 16:50:06,783 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:50:06,783 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:06,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:50:06,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:06,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334976414] [2025-01-09 16:50:06,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334976414] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:50:06,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:50:06,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 16:50:06,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766264779] [2025-01-09 16:50:06,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:50:06,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 16:50:06,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:06,975 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 16:50:06,975 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-09 16:50:06,976 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:06,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 293 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 16:50:06,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:06,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:06,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:07,087 INFO L124 PetriNetUnfolderBase]: 107/204 cut-off events. [2025-01-09 16:50:07,087 INFO L125 PetriNetUnfolderBase]: For 408/408 co-relation queries the response was YES. [2025-01-09 16:50:07,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 204 events. 107/204 cut-off events. For 408/408 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 641 event pairs, 30 based on Foata normal form. 2/188 useless extension candidates. Maximal degree in co-relation 771. Up to 125 conditions per place. [2025-01-09 16:50:07,090 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 38 selfloop transitions, 17 changer transitions 0/56 dead transitions. [2025-01-09 16:50:07,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 56 transitions, 473 flow [2025-01-09 16:50:07,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 16:50:07,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-09 16:50:07,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2025-01-09 16:50:07,091 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48 [2025-01-09 16:50:07,091 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 293 flow. Second operand 5 states and 48 transitions. [2025-01-09 16:50:07,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 56 transitions, 473 flow [2025-01-09 16:50:07,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 56 transitions, 446 flow, removed 1 selfloop flow, removed 3 redundant places. [2025-01-09 16:50:07,095 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 355 flow [2025-01-09 16:50:07,095 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=355, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2025-01-09 16:50:07,097 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2025-01-09 16:50:07,098 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 355 flow [2025-01-09 16:50:07,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 16:50:07,098 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:07,099 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:50:07,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-01-09 16:50:07,099 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 16:50:07,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:07,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1485838569, now seen corresponding path program 6 times [2025-01-09 16:50:07,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:07,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852836769] [2025-01-09 16:50:07,101 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:50:07,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:07,110 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 2 equivalence classes. [2025-01-09 16:50:07,119 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 14 of 15 statements. [2025-01-09 16:50:07,119 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-01-09 16:50:07,119 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:07,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:50:07,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:07,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852836769] [2025-01-09 16:50:07,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852836769] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:50:07,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:50:07,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 16:50:07,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303818340] [2025-01-09 16:50:07,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:50:07,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 16:50:07,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:07,235 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 16:50:07,235 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-09 16:50:07,235 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:07,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 355 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 16:50:07,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:07,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:07,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:07,348 INFO L124 PetriNetUnfolderBase]: 106/197 cut-off events. [2025-01-09 16:50:07,348 INFO L125 PetriNetUnfolderBase]: For 604/604 co-relation queries the response was YES. [2025-01-09 16:50:07,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 881 conditions, 197 events. 106/197 cut-off events. For 604/604 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 593 event pairs, 38 based on Foata normal form. 2/186 useless extension candidates. Maximal degree in co-relation 850. Up to 154 conditions per place. [2025-01-09 16:50:07,352 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 33 selfloop transitions, 18 changer transitions 0/52 dead transitions. [2025-01-09 16:50:07,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 492 flow [2025-01-09 16:50:07,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 16:50:07,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-09 16:50:07,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2025-01-09 16:50:07,353 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47 [2025-01-09 16:50:07,354 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 355 flow. Second operand 5 states and 47 transitions. [2025-01-09 16:50:07,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 492 flow [2025-01-09 16:50:07,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 473 flow, removed 4 selfloop flow, removed 1 redundant places. [2025-01-09 16:50:07,362 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 387 flow [2025-01-09 16:50:07,362 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=387, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2025-01-09 16:50:07,362 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 33 predicate places. [2025-01-09 16:50:07,363 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 387 flow [2025-01-09 16:50:07,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 16:50:07,363 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:07,363 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:50:07,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-01-09 16:50:07,363 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 16:50:07,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:07,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1063500062, now seen corresponding path program 1 times [2025-01-09 16:50:07,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:07,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029213427] [2025-01-09 16:50:07,364 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:50:07,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:07,375 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-09 16:50:07,389 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:50:07,391 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:50:07,391 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:07,518 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 16:50:07,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:07,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029213427] [2025-01-09 16:50:07,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029213427] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:50:07,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106405340] [2025-01-09 16:50:07,521 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:50:07,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:07,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:50:07,524 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 16:50:07,529 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 16:50:07,587 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-09 16:50:07,614 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:50:07,614 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:50:07,614 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:07,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-01-09 16:50:07,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:50:07,734 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 16:50:08,096 INFO L349 Elim1Store]: treesize reduction 74, result has 14.9 percent of original size [2025-01-09 16:50:08,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 203 treesize of output 146 [2025-01-09 16:50:08,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:50:08,232 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:50:08,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 318 treesize of output 280 [2025-01-09 16:50:09,155 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 16:50:09,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 1183 treesize of output 873 [2025-01-09 16:50:28,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:50:28,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106405340] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:50:28,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:50:28,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-01-09 16:50:28,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574183062] [2025-01-09 16:50:28,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:50:28,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-09 16:50:28,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:28,503 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-09 16:50:28,503 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2025-01-09 16:50:28,503 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:28,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 387 flow. Second operand has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 0 states have call successors, (0), 0 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 16:50:28,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:28,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:28,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:29,222 INFO L124 PetriNetUnfolderBase]: 243/448 cut-off events. [2025-01-09 16:50:29,222 INFO L125 PetriNetUnfolderBase]: For 1249/1249 co-relation queries the response was YES. [2025-01-09 16:50:29,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2032 conditions, 448 events. 243/448 cut-off events. For 1249/1249 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1824 event pairs, 17 based on Foata normal form. 4/416 useless extension candidates. Maximal degree in co-relation 1647. Up to 153 conditions per place. [2025-01-09 16:50:29,225 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 61 selfloop transitions, 43 changer transitions 52/157 dead transitions. [2025-01-09 16:50:29,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 157 transitions, 1343 flow [2025-01-09 16:50:29,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-01-09 16:50:29,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-01-09 16:50:29,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 210 transitions. [2025-01-09 16:50:29,227 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4375 [2025-01-09 16:50:29,227 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 387 flow. Second operand 24 states and 210 transitions. [2025-01-09 16:50:29,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 157 transitions, 1343 flow [2025-01-09 16:50:29,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 157 transitions, 1261 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-01-09 16:50:29,234 INFO L231 Difference]: Finished difference. Result has 84 places, 62 transitions, 636 flow [2025-01-09 16:50:29,234 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=636, PETRI_PLACES=84, PETRI_TRANSITIONS=62} [2025-01-09 16:50:29,235 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 63 predicate places. [2025-01-09 16:50:29,235 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 62 transitions, 636 flow [2025-01-09 16:50:29,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 0 states have call successors, (0), 0 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 16:50:29,235 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:29,235 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:50:29,244 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 16:50:29,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:29,440 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 16:50:29,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:29,440 INFO L85 PathProgramCache]: Analyzing trace with hash -63545062, now seen corresponding path program 1 times [2025-01-09 16:50:29,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:29,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38459071] [2025-01-09 16:50:29,441 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:50:29,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:29,447 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-09 16:50:29,457 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:50:29,457 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:50:29,457 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:29,559 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 16:50:29,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:29,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38459071] [2025-01-09 16:50:29,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38459071] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:50:29,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353832246] [2025-01-09 16:50:29,559 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:50:29,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:29,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:50:29,561 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 16:50:29,563 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 16:50:29,614 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-09 16:50:29,634 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:50:29,635 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:50:29,635 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:29,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-01-09 16:50:29,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:50:29,842 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 15 treesize of output 7 [2025-01-09 16:50:29,855 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 16:50:29,855 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:50:30,278 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 16:50:30,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 63 [2025-01-09 16:50:30,405 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 16:50:30,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353832246] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:50:30,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:50:30,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2025-01-09 16:50:30,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43343860] [2025-01-09 16:50:30,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:50:30,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-09 16:50:30,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:30,407 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-09 16:50:30,408 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2025-01-09 16:50:30,408 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:30,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 62 transitions, 636 flow. Second operand has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:50:30,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:30,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:30,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:32,128 INFO L124 PetriNetUnfolderBase]: 275/536 cut-off events. [2025-01-09 16:50:32,128 INFO L125 PetriNetUnfolderBase]: For 2550/2550 co-relation queries the response was YES. [2025-01-09 16:50:32,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2728 conditions, 536 events. 275/536 cut-off events. For 2550/2550 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2439 event pairs, 7 based on Foata normal form. 7/541 useless extension candidates. Maximal degree in co-relation 2636. Up to 176 conditions per place. [2025-01-09 16:50:32,138 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 76 selfloop transitions, 57 changer transitions 3/137 dead transitions. [2025-01-09 16:50:32,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 137 transitions, 1377 flow [2025-01-09 16:50:32,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-01-09 16:50:32,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-01-09 16:50:32,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 148 transitions. [2025-01-09 16:50:32,145 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4625 [2025-01-09 16:50:32,145 INFO L175 Difference]: Start difference. First operand has 84 places, 62 transitions, 636 flow. Second operand 16 states and 148 transitions. [2025-01-09 16:50:32,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 137 transitions, 1377 flow [2025-01-09 16:50:32,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 137 transitions, 1232 flow, removed 50 selfloop flow, removed 11 redundant places. [2025-01-09 16:50:32,160 INFO L231 Difference]: Finished difference. Result has 86 places, 86 transitions, 936 flow [2025-01-09 16:50:32,161 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=936, PETRI_PLACES=86, PETRI_TRANSITIONS=86} [2025-01-09 16:50:32,162 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2025-01-09 16:50:32,162 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 86 transitions, 936 flow [2025-01-09 16:50:32,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:50:32,162 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:32,163 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:50:32,171 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 16:50:32,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:32,367 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 16:50:32,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:32,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1654203998, now seen corresponding path program 2 times [2025-01-09 16:50:32,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:32,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942802285] [2025-01-09 16:50:32,367 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:50:32,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:32,373 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:50:32,400 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:50:32,400 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:50:32,400 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:32,516 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 16:50:32,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:32,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942802285] [2025-01-09 16:50:32,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942802285] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:50:32,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192471879] [2025-01-09 16:50:32,517 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:50:32,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:32,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:50:32,520 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 16:50:32,527 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 16:50:32,570 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:50:32,606 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:50:32,606 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:50:32,606 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:32,607 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-09 16:50:32,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:50:32,658 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 16:50:32,658 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:50:32,755 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 16:50:32,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192471879] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:50:32,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:50:32,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-01-09 16:50:32,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361088907] [2025-01-09 16:50:32,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:50:32,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-09 16:50:32,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:32,756 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-09 16:50:32,756 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2025-01-09 16:50:32,756 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:32,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 86 transitions, 936 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 16:50:32,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:32,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:32,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:33,205 INFO L124 PetriNetUnfolderBase]: 317/614 cut-off events. [2025-01-09 16:50:33,206 INFO L125 PetriNetUnfolderBase]: For 3712/3712 co-relation queries the response was YES. [2025-01-09 16:50:33,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3435 conditions, 614 events. 317/614 cut-off events. For 3712/3712 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2897 event pairs, 80 based on Foata normal form. 15/629 useless extension candidates. Maximal degree in co-relation 3253. Up to 288 conditions per place. [2025-01-09 16:50:33,213 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 83 selfloop transitions, 53 changer transitions 0/137 dead transitions. [2025-01-09 16:50:33,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 137 transitions, 1557 flow [2025-01-09 16:50:33,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-09 16:50:33,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-01-09 16:50:33,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 104 transitions. [2025-01-09 16:50:33,215 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2025-01-09 16:50:33,215 INFO L175 Difference]: Start difference. First operand has 86 places, 86 transitions, 936 flow. Second operand 11 states and 104 transitions. [2025-01-09 16:50:33,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 137 transitions, 1557 flow [2025-01-09 16:50:33,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 137 transitions, 1322 flow, removed 87 selfloop flow, removed 4 redundant places. [2025-01-09 16:50:33,234 INFO L231 Difference]: Finished difference. Result has 96 places, 106 transitions, 1127 flow [2025-01-09 16:50:33,235 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1127, PETRI_PLACES=96, PETRI_TRANSITIONS=106} [2025-01-09 16:50:33,236 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 75 predicate places. [2025-01-09 16:50:33,237 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 106 transitions, 1127 flow [2025-01-09 16:50:33,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 16:50:33,237 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:33,237 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:50:33,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-01-09 16:50:33,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:33,442 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 16:50:33,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:33,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1760557868, now seen corresponding path program 3 times [2025-01-09 16:50:33,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:33,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184772477] [2025-01-09 16:50:33,443 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:50:33,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:33,451 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:50:33,470 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:50:33,470 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:50:33,470 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:33,633 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 16:50:33,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:33,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184772477] [2025-01-09 16:50:33,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184772477] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:50:33,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61191072] [2025-01-09 16:50:33,633 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:50:33,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:33,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:50:33,636 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 16:50:33,638 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 16:50:33,687 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:50:33,720 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:50:33,720 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:50:33,720 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:33,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-09 16:50:33,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:50:33,769 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 16:50:33,769 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:50:33,864 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 16:50:33,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61191072] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:50:33,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:50:33,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-01-09 16:50:33,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113835857] [2025-01-09 16:50:33,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:50:33,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-09 16:50:33,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:33,865 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-09 16:50:33,865 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-01-09 16:50:33,865 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:33,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 106 transitions, 1127 flow. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 16:50:33,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:33,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:33,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:34,472 INFO L124 PetriNetUnfolderBase]: 317/618 cut-off events. [2025-01-09 16:50:34,472 INFO L125 PetriNetUnfolderBase]: For 3365/3365 co-relation queries the response was YES. [2025-01-09 16:50:34,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3305 conditions, 618 events. 317/618 cut-off events. For 3365/3365 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2931 event pairs, 80 based on Foata normal form. 6/623 useless extension candidates. Maximal degree in co-relation 3133. Up to 292 conditions per place. [2025-01-09 16:50:34,478 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 84 selfloop transitions, 50 changer transitions 0/135 dead transitions. [2025-01-09 16:50:34,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 135 transitions, 1517 flow [2025-01-09 16:50:34,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-09 16:50:34,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-01-09 16:50:34,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 97 transitions. [2025-01-09 16:50:34,480 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.485 [2025-01-09 16:50:34,480 INFO L175 Difference]: Start difference. First operand has 96 places, 106 transitions, 1127 flow. Second operand 10 states and 97 transitions. [2025-01-09 16:50:34,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 135 transitions, 1517 flow [2025-01-09 16:50:34,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 135 transitions, 1439 flow, removed 13 selfloop flow, removed 5 redundant places. [2025-01-09 16:50:34,498 INFO L231 Difference]: Finished difference. Result has 101 places, 107 transitions, 1163 flow [2025-01-09 16:50:34,498 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1163, PETRI_PLACES=101, PETRI_TRANSITIONS=107} [2025-01-09 16:50:34,499 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 80 predicate places. [2025-01-09 16:50:34,499 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 107 transitions, 1163 flow [2025-01-09 16:50:34,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 16:50:34,499 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:34,499 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:50:34,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-09 16:50:34,700 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,SelfDestructingSolverStorable10 [2025-01-09 16:50:34,700 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 16:50:34,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:34,701 INFO L85 PathProgramCache]: Analyzing trace with hash 897520816, now seen corresponding path program 4 times [2025-01-09 16:50:34,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:34,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212595881] [2025-01-09 16:50:34,701 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:50:34,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:34,708 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:50:34,725 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:50:34,725 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:50:34,725 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:34,852 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 16:50:34,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:34,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212595881] [2025-01-09 16:50:34,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212595881] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:50:34,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495780625] [2025-01-09 16:50:34,852 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:50:34,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:34,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:50:34,854 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 16:50:34,857 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 16:50:34,909 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:50:34,928 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:50:34,928 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:50:34,928 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:34,929 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-01-09 16:50:34,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:50:35,173 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 16:50:35,173 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 39 [2025-01-09 16:50:35,226 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 16:50:35,227 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:50:35,337 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 16:50:35,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 154 treesize of output 154 [2025-01-09 16:50:36,756 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 16:50:36,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495780625] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:50:36,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:50:36,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2025-01-09 16:50:36,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180920378] [2025-01-09 16:50:36,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:50:36,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-09 16:50:36,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:36,758 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-09 16:50:36,758 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2025-01-09 16:50:36,758 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:36,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 107 transitions, 1163 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:50:36,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:36,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:36,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:37,310 INFO L124 PetriNetUnfolderBase]: 331/679 cut-off events. [2025-01-09 16:50:37,310 INFO L125 PetriNetUnfolderBase]: For 3714/3714 co-relation queries the response was YES. [2025-01-09 16:50:37,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3600 conditions, 679 events. 331/679 cut-off events. For 3714/3714 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3463 event pairs, 4 based on Foata normal form. 6/684 useless extension candidates. Maximal degree in co-relation 3433. Up to 339 conditions per place. [2025-01-09 16:50:37,318 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 85 selfloop transitions, 66 changer transitions 6/158 dead transitions. [2025-01-09 16:50:37,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 158 transitions, 1785 flow [2025-01-09 16:50:37,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-01-09 16:50:37,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-01-09 16:50:37,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 122 transitions. [2025-01-09 16:50:37,321 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4066666666666667 [2025-01-09 16:50:37,321 INFO L175 Difference]: Start difference. First operand has 101 places, 107 transitions, 1163 flow. Second operand 15 states and 122 transitions. [2025-01-09 16:50:37,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 158 transitions, 1785 flow [2025-01-09 16:50:37,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 158 transitions, 1722 flow, removed 2 selfloop flow, removed 5 redundant places. [2025-01-09 16:50:37,340 INFO L231 Difference]: Finished difference. Result has 114 places, 119 transitions, 1408 flow [2025-01-09 16:50:37,341 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1101, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1408, PETRI_PLACES=114, PETRI_TRANSITIONS=119} [2025-01-09 16:50:37,341 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 93 predicate places. [2025-01-09 16:50:37,341 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 119 transitions, 1408 flow [2025-01-09 16:50:37,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:50:37,342 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:37,342 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:50:37,350 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 16:50:37,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-01-09 16:50:37,544 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 16:50:37,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:37,544 INFO L85 PathProgramCache]: Analyzing trace with hash 448650850, now seen corresponding path program 5 times [2025-01-09 16:50:37,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:37,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211621101] [2025-01-09 16:50:37,544 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:50:37,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:37,550 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:50:37,562 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:50:37,562 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:50:37,562 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:37,677 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 16:50:37,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:37,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211621101] [2025-01-09 16:50:37,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211621101] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:50:37,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062076935] [2025-01-09 16:50:37,677 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:50:37,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:37,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:50:37,679 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 16:50:37,681 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 16:50:37,731 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:50:37,750 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:50:37,750 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:50:37,750 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:37,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-01-09 16:50:37,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:50:37,779 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 16:50:37,944 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 105 treesize of output 93 [2025-01-09 16:50:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:50:37,991 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:50:38,850 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 77 [2025-01-09 16:50:38,884 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 16:50:38,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 188 [2025-01-09 16:50:39,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2025-01-09 16:50:39,947 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-01-09 16:50:39,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 1 [2025-01-09 16:50:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:50:39,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062076935] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:50:39,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:50:39,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2025-01-09 16:50:39,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875240644] [2025-01-09 16:50:39,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:50:39,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-01-09 16:50:39,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:39,994 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-01-09 16:50:39,994 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2025-01-09 16:50:39,994 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:39,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 119 transitions, 1408 flow. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:50:39,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:39,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:39,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:41,616 INFO L124 PetriNetUnfolderBase]: 391/835 cut-off events. [2025-01-09 16:50:41,616 INFO L125 PetriNetUnfolderBase]: For 6593/6593 co-relation queries the response was YES. [2025-01-09 16:50:41,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4727 conditions, 835 events. 391/835 cut-off events. For 6593/6593 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4760 event pairs, 17 based on Foata normal form. 13/848 useless extension candidates. Maximal degree in co-relation 4613. Up to 343 conditions per place. [2025-01-09 16:50:41,623 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 118 selfloop transitions, 98 changer transitions 29/246 dead transitions. [2025-01-09 16:50:41,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 246 transitions, 2853 flow [2025-01-09 16:50:41,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-01-09 16:50:41,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-01-09 16:50:41,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 231 transitions. [2025-01-09 16:50:41,625 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2025-01-09 16:50:41,625 INFO L175 Difference]: Start difference. First operand has 114 places, 119 transitions, 1408 flow. Second operand 27 states and 231 transitions. [2025-01-09 16:50:41,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 246 transitions, 2853 flow [2025-01-09 16:50:41,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 246 transitions, 2604 flow, removed 74 selfloop flow, removed 13 redundant places. [2025-01-09 16:50:41,659 INFO L231 Difference]: Finished difference. Result has 135 places, 152 transitions, 1851 flow [2025-01-09 16:50:41,659 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1851, PETRI_PLACES=135, PETRI_TRANSITIONS=152} [2025-01-09 16:50:41,660 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 114 predicate places. [2025-01-09 16:50:41,660 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 152 transitions, 1851 flow [2025-01-09 16:50:41,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:50:41,661 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:41,661 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:50:41,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-01-09 16:50:41,861 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,SelfDestructingSolverStorable12 [2025-01-09 16:50:41,862 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 16:50:41,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:41,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1163338986, now seen corresponding path program 6 times [2025-01-09 16:50:41,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:41,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341383858] [2025-01-09 16:50:41,863 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:50:41,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:41,868 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:50:41,890 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:50:41,890 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-01-09 16:50:41,891 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:42,034 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 16:50:42,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:42,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341383858] [2025-01-09 16:50:42,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341383858] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:50:42,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655234827] [2025-01-09 16:50:42,034 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:50:42,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:42,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:50:42,037 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 16:50:42,038 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 16:50:42,087 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 16 statements into 2 equivalence classes. [2025-01-09 16:50:42,131 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:50:42,131 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-01-09 16:50:42,131 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:42,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-09 16:50:42,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:50:42,171 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 16:50:42,171 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:50:42,245 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 16:50:42,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655234827] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:50:42,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:50:42,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2025-01-09 16:50:42,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731826657] [2025-01-09 16:50:42,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:50:42,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-09 16:50:42,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:42,246 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-09 16:50:42,246 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-01-09 16:50:42,247 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:42,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 152 transitions, 1851 flow. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:50:42,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:42,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:42,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:42,990 INFO L124 PetriNetUnfolderBase]: 449/935 cut-off events. [2025-01-09 16:50:42,990 INFO L125 PetriNetUnfolderBase]: For 6030/6030 co-relation queries the response was YES. [2025-01-09 16:50:42,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5453 conditions, 935 events. 449/935 cut-off events. For 6030/6030 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5367 event pairs, 72 based on Foata normal form. 6/928 useless extension candidates. Maximal degree in co-relation 5190. Up to 347 conditions per place. [2025-01-09 16:50:43,000 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 114 selfloop transitions, 91 changer transitions 0/206 dead transitions. [2025-01-09 16:50:43,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 206 transitions, 2698 flow [2025-01-09 16:50:43,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-01-09 16:50:43,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-01-09 16:50:43,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 116 transitions. [2025-01-09 16:50:43,002 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2025-01-09 16:50:43,002 INFO L175 Difference]: Start difference. First operand has 135 places, 152 transitions, 1851 flow. Second operand 14 states and 116 transitions. [2025-01-09 16:50:43,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 206 transitions, 2698 flow [2025-01-09 16:50:43,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 206 transitions, 2464 flow, removed 50 selfloop flow, removed 8 redundant places. [2025-01-09 16:50:43,032 INFO L231 Difference]: Finished difference. Result has 144 places, 167 transitions, 2096 flow [2025-01-09 16:50:43,033 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2096, PETRI_PLACES=144, PETRI_TRANSITIONS=167} [2025-01-09 16:50:43,033 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 123 predicate places. [2025-01-09 16:50:43,033 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 167 transitions, 2096 flow [2025-01-09 16:50:43,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:50:43,033 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:43,033 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:50:43,040 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 16:50:43,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:43,234 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 16:50:43,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:43,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1181773012, now seen corresponding path program 7 times [2025-01-09 16:50:43,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:43,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627315461] [2025-01-09 16:50:43,235 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 16:50:43,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:43,240 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-09 16:50:43,247 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:50:43,247 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:50:43,247 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:43,348 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 16:50:43,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:43,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627315461] [2025-01-09 16:50:43,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627315461] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:50:43,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000384303] [2025-01-09 16:50:43,348 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 16:50:43,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:43,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:50:43,350 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 16:50:43,353 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 16:50:43,401 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-09 16:50:43,420 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 16:50:43,420 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:50:43,420 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:43,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-01-09 16:50:43,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:50:43,451 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 16:50:43,681 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 16:50:43,681 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 39 [2025-01-09 16:50:43,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:50:43,723 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:50:43,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2025-01-09 16:50:43,936 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-01-09 16:50:43,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2025-01-09 16:50:43,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:50:43,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000384303] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:50:43,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:50:43,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2025-01-09 16:50:43,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528811034] [2025-01-09 16:50:43,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:50:43,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-01-09 16:50:43,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:43,959 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-01-09 16:50:43,959 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2025-01-09 16:50:43,959 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:43,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 167 transitions, 2096 flow. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 16:50:43,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:43,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:43,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:44,594 INFO L124 PetriNetUnfolderBase]: 460/965 cut-off events. [2025-01-09 16:50:44,594 INFO L125 PetriNetUnfolderBase]: For 6851/6851 co-relation queries the response was YES. [2025-01-09 16:50:44,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5866 conditions, 965 events. 460/965 cut-off events. For 6851/6851 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5558 event pairs, 10 based on Foata normal form. 6/958 useless extension candidates. Maximal degree in co-relation 5532. Up to 338 conditions per place. [2025-01-09 16:50:44,603 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 99 selfloop transitions, 117 changer transitions 8/225 dead transitions. [2025-01-09 16:50:44,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 225 transitions, 3007 flow [2025-01-09 16:50:44,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-01-09 16:50:44,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-01-09 16:50:44,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 138 transitions. [2025-01-09 16:50:44,604 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2025-01-09 16:50:44,604 INFO L175 Difference]: Start difference. First operand has 144 places, 167 transitions, 2096 flow. Second operand 18 states and 138 transitions. [2025-01-09 16:50:44,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 225 transitions, 3007 flow [2025-01-09 16:50:44,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 225 transitions, 2775 flow, removed 75 selfloop flow, removed 4 redundant places. [2025-01-09 16:50:44,641 INFO L231 Difference]: Finished difference. Result has 161 places, 181 transitions, 2381 flow [2025-01-09 16:50:44,641 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1908, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2381, PETRI_PLACES=161, PETRI_TRANSITIONS=181} [2025-01-09 16:50:44,642 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 140 predicate places. [2025-01-09 16:50:44,642 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 181 transitions, 2381 flow [2025-01-09 16:50:44,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 16:50:44,642 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:44,642 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:50:44,650 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 16:50:44,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-01-09 16:50:44,846 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 16:50:44,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:44,846 INFO L85 PathProgramCache]: Analyzing trace with hash 371823139, now seen corresponding path program 8 times [2025-01-09 16:50:44,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:44,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335361870] [2025-01-09 16:50:44,846 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:50:44,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:44,852 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-01-09 16:50:44,870 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 16:50:44,870 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:50:44,870 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:45,185 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 16:50:45,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:45,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335361870] [2025-01-09 16:50:45,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335361870] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:50:45,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095308496] [2025-01-09 16:50:45,185 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:50:45,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:45,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:50:45,187 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 16:50:45,188 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 16:50:45,234 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-01-09 16:50:45,275 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 16:50:45,275 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:50:45,275 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:45,276 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-01-09 16:50:45,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:50:45,296 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 16:50:45,411 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 16:50:45,411 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:50:46,384 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 77 [2025-01-09 16:50:46,419 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 16:50:46,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 188 [2025-01-09 16:50:47,386 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 16:50:47,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095308496] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:50:47,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:50:47,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2025-01-09 16:50:47,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506386721] [2025-01-09 16:50:47,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:50:47,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-09 16:50:47,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:47,387 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-09 16:50:47,388 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2025-01-09 16:50:47,388 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:47,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 181 transitions, 2381 flow. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:50:47,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:47,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:47,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:47,831 INFO L124 PetriNetUnfolderBase]: 445/934 cut-off events. [2025-01-09 16:50:47,831 INFO L125 PetriNetUnfolderBase]: For 7653/7653 co-relation queries the response was YES. [2025-01-09 16:50:47,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5971 conditions, 934 events. 445/934 cut-off events. For 7653/7653 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5335 event pairs, 46 based on Foata normal form. 4/923 useless extension candidates. Maximal degree in co-relation 5714. Up to 567 conditions per place. [2025-01-09 16:50:47,838 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 119 selfloop transitions, 15 changer transitions 87/222 dead transitions. [2025-01-09 16:50:47,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 222 transitions, 3165 flow [2025-01-09 16:50:47,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-09 16:50:47,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-01-09 16:50:47,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 108 transitions. [2025-01-09 16:50:47,840 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45 [2025-01-09 16:50:47,840 INFO L175 Difference]: Start difference. First operand has 161 places, 181 transitions, 2381 flow. Second operand 12 states and 108 transitions. [2025-01-09 16:50:47,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 222 transitions, 3165 flow [2025-01-09 16:50:47,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 222 transitions, 2885 flow, removed 100 selfloop flow, removed 10 redundant places. [2025-01-09 16:50:47,874 INFO L231 Difference]: Finished difference. Result has 163 places, 131 transitions, 1542 flow [2025-01-09 16:50:47,875 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2169, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1542, PETRI_PLACES=163, PETRI_TRANSITIONS=131} [2025-01-09 16:50:47,875 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 142 predicate places. [2025-01-09 16:50:47,875 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 131 transitions, 1542 flow [2025-01-09 16:50:47,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:50:47,875 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:47,875 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:50:47,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-01-09 16:50:48,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:48,076 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 16:50:48,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:48,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1061853401, now seen corresponding path program 2 times [2025-01-09 16:50:48,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:48,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304126862] [2025-01-09 16:50:48,076 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:50:48,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:48,081 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-01-09 16:50:48,096 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 16:50:48,096 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:50:48,096 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:48,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:48,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:48,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304126862] [2025-01-09 16:50:48,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304126862] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:50:48,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480292711] [2025-01-09 16:50:48,201 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:50:48,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:48,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:50:48,203 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 16:50:48,206 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 16:50:48,262 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-01-09 16:50:48,327 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 16:50:48,327 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:50:48,327 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:48,329 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-09 16:50:48,330 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:50:48,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:48,399 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:50:48,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:48,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480292711] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:50:48,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:50:48,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2025-01-09 16:50:48,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765808804] [2025-01-09 16:50:48,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:50:48,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-09 16:50:48,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:48,532 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-09 16:50:48,533 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2025-01-09 16:50:48,533 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:48,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 131 transitions, 1542 flow. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 16:50:48,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:48,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:48,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:49,060 INFO L124 PetriNetUnfolderBase]: 339/668 cut-off events. [2025-01-09 16:50:49,061 INFO L125 PetriNetUnfolderBase]: For 4109/4109 co-relation queries the response was YES. [2025-01-09 16:50:49,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4116 conditions, 668 events. 339/668 cut-off events. For 4109/4109 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3368 event pairs, 39 based on Foata normal form. 12/656 useless extension candidates. Maximal degree in co-relation 4041. Up to 161 conditions per place. [2025-01-09 16:50:49,067 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 109 selfloop transitions, 93 changer transitions 0/203 dead transitions. [2025-01-09 16:50:49,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 203 transitions, 2575 flow [2025-01-09 16:50:49,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-01-09 16:50:49,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-01-09 16:50:49,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 151 transitions. [2025-01-09 16:50:49,068 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4441176470588235 [2025-01-09 16:50:49,068 INFO L175 Difference]: Start difference. First operand has 163 places, 131 transitions, 1542 flow. Second operand 17 states and 151 transitions. [2025-01-09 16:50:49,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 203 transitions, 2575 flow [2025-01-09 16:50:49,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 203 transitions, 2371 flow, removed 34 selfloop flow, removed 15 redundant places. [2025-01-09 16:50:49,082 INFO L231 Difference]: Finished difference. Result has 145 places, 156 transitions, 1982 flow [2025-01-09 16:50:49,082 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1386, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1982, PETRI_PLACES=145, PETRI_TRANSITIONS=156} [2025-01-09 16:50:49,083 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 124 predicate places. [2025-01-09 16:50:49,083 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 156 transitions, 1982 flow [2025-01-09 16:50:49,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 16:50:49,083 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:49,083 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:50:49,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-01-09 16:50:49,283 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,SelfDestructingSolverStorable16 [2025-01-09 16:50:49,283 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 16:50:49,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:49,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1541540887, now seen corresponding path program 3 times [2025-01-09 16:50:49,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:49,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620564866] [2025-01-09 16:50:49,284 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:50:49,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:49,290 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 2 equivalence classes. [2025-01-09 16:50:49,306 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 16:50:49,307 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:50:49,307 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:49,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:49,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620564866] [2025-01-09 16:50:49,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620564866] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:50:49,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517411611] [2025-01-09 16:50:49,411 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:50:49,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:49,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:50:49,414 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 16:50:49,415 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 16:50:49,474 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 2 equivalence classes. [2025-01-09 16:50:49,525 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 16:50:49,525 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:50:49,525 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:49,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-09 16:50:49,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:50:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:49,571 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:50:49,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:49,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517411611] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:50:49,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:50:49,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-01-09 16:50:49,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550475108] [2025-01-09 16:50:49,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:50:49,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 16:50:49,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:49,665 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 16:50:49,666 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2025-01-09 16:50:49,666 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:49,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 156 transitions, 1982 flow. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 16:50:49,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:49,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:49,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:50,988 INFO L124 PetriNetUnfolderBase]: 417/809 cut-off events. [2025-01-09 16:50:50,988 INFO L125 PetriNetUnfolderBase]: For 5534/5534 co-relation queries the response was YES. [2025-01-09 16:50:50,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5250 conditions, 809 events. 417/809 cut-off events. For 5534/5534 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 4244 event pairs, 60 based on Foata normal form. 8/817 useless extension candidates. Maximal degree in co-relation 5181. Up to 278 conditions per place. [2025-01-09 16:50:50,993 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 138 selfloop transitions, 96 changer transitions 0/235 dead transitions. [2025-01-09 16:50:50,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 235 transitions, 3196 flow [2025-01-09 16:50:50,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-01-09 16:50:50,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-01-09 16:50:50,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 157 transitions. [2025-01-09 16:50:50,995 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46176470588235297 [2025-01-09 16:50:50,995 INFO L175 Difference]: Start difference. First operand has 145 places, 156 transitions, 1982 flow. Second operand 17 states and 157 transitions. [2025-01-09 16:50:50,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 235 transitions, 3196 flow [2025-01-09 16:50:51,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 235 transitions, 2971 flow, removed 106 selfloop flow, removed 5 redundant places. [2025-01-09 16:50:51,023 INFO L231 Difference]: Finished difference. Result has 162 places, 187 transitions, 2575 flow [2025-01-09 16:50:51,023 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1809, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2575, PETRI_PLACES=162, PETRI_TRANSITIONS=187} [2025-01-09 16:50:51,024 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 141 predicate places. [2025-01-09 16:50:51,024 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 187 transitions, 2575 flow [2025-01-09 16:50:51,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 16:50:51,024 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:51,024 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:50:51,030 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 16:50:51,224 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,SelfDestructingSolverStorable17 [2025-01-09 16:50:51,225 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 16:50:51,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:51,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1435187017, now seen corresponding path program 4 times [2025-01-09 16:50:51,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:51,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224817692] [2025-01-09 16:50:51,225 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:50:51,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:51,231 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 17 statements into 2 equivalence classes. [2025-01-09 16:50:51,240 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 16:50:51,240 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:50:51,240 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:51,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:51,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:51,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224817692] [2025-01-09 16:50:51,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224817692] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:50:51,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767189468] [2025-01-09 16:50:51,417 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:50:51,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:51,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:50:51,421 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 16:50:51,422 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 16:50:51,480 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 17 statements into 2 equivalence classes. [2025-01-09 16:50:51,543 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 16:50:51,543 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:50:51,543 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:51,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-09 16:50:51,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:50:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:51,600 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:50:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:51,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767189468] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:50:51,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:50:51,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-01-09 16:50:51,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623786810] [2025-01-09 16:50:51,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:50:51,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 16:50:51,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:51,690 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 16:50:51,690 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-01-09 16:50:51,690 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:51,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 187 transitions, 2575 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 16:50:51,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:51,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:51,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:53,315 INFO L124 PetriNetUnfolderBase]: 400/786 cut-off events. [2025-01-09 16:50:53,316 INFO L125 PetriNetUnfolderBase]: For 6020/6020 co-relation queries the response was YES. [2025-01-09 16:50:53,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5213 conditions, 786 events. 400/786 cut-off events. For 6020/6020 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4136 event pairs, 60 based on Foata normal form. 18/804 useless extension candidates. Maximal degree in co-relation 5140. Up to 278 conditions per place. [2025-01-09 16:50:53,322 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 137 selfloop transitions, 93 changer transitions 0/231 dead transitions. [2025-01-09 16:50:53,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 231 transitions, 3166 flow [2025-01-09 16:50:53,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-01-09 16:50:53,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-01-09 16:50:53,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 168 transitions. [2025-01-09 16:50:53,324 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4421052631578947 [2025-01-09 16:50:53,324 INFO L175 Difference]: Start difference. First operand has 162 places, 187 transitions, 2575 flow. Second operand 19 states and 168 transitions. [2025-01-09 16:50:53,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 231 transitions, 3166 flow [2025-01-09 16:50:53,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 231 transitions, 2959 flow, removed 98 selfloop flow, removed 3 redundant places. [2025-01-09 16:50:53,353 INFO L231 Difference]: Finished difference. Result has 178 places, 184 transitions, 2526 flow [2025-01-09 16:50:53,353 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2267, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2526, PETRI_PLACES=178, PETRI_TRANSITIONS=184} [2025-01-09 16:50:53,354 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 157 predicate places. [2025-01-09 16:50:53,354 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 184 transitions, 2526 flow [2025-01-09 16:50:53,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 16:50:53,354 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:53,354 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:50:53,360 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 16:50:53,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:53,554 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 16:50:53,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:53,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1393059595, now seen corresponding path program 5 times [2025-01-09 16:50:53,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:53,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738825355] [2025-01-09 16:50:53,555 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:50:53,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:53,561 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-01-09 16:50:53,572 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 16:50:53,572 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:50:53,572 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:53,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:53,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:53,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738825355] [2025-01-09 16:50:53,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738825355] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:50:53,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565690111] [2025-01-09 16:50:53,723 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 16:50:53,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:53,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:50:53,725 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 16:50:53,727 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 16:50:53,788 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-01-09 16:50:53,836 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 16:50:53,836 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:50:53,836 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:53,837 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-09 16:50:53,838 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:50:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:53,899 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:50:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:53,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565690111] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:50:53,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:50:53,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-01-09 16:50:53,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972811850] [2025-01-09 16:50:53,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:50:53,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-09 16:50:53,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:53,987 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-09 16:50:53,987 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2025-01-09 16:50:53,988 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:53,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 184 transitions, 2526 flow. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 16:50:53,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:53,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:53,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:54,700 INFO L124 PetriNetUnfolderBase]: 584/1166 cut-off events. [2025-01-09 16:50:54,700 INFO L125 PetriNetUnfolderBase]: For 8898/8898 co-relation queries the response was YES. [2025-01-09 16:50:54,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7540 conditions, 1166 events. 584/1166 cut-off events. For 8898/8898 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6701 event pairs, 40 based on Foata normal form. 8/1174 useless extension candidates. Maximal degree in co-relation 7465. Up to 329 conditions per place. [2025-01-09 16:50:54,709 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 167 selfloop transitions, 153 changer transitions 0/321 dead transitions. [2025-01-09 16:50:54,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 321 transitions, 4727 flow [2025-01-09 16:50:54,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-01-09 16:50:54,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-01-09 16:50:54,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 174 transitions. [2025-01-09 16:50:54,711 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2025-01-09 16:50:54,711 INFO L175 Difference]: Start difference. First operand has 178 places, 184 transitions, 2526 flow. Second operand 18 states and 174 transitions. [2025-01-09 16:50:54,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 321 transitions, 4727 flow [2025-01-09 16:50:54,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 321 transitions, 4439 flow, removed 42 selfloop flow, removed 16 redundant places. [2025-01-09 16:50:54,743 INFO L231 Difference]: Finished difference. Result has 187 places, 238 transitions, 3620 flow [2025-01-09 16:50:54,743 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2314, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3620, PETRI_PLACES=187, PETRI_TRANSITIONS=238} [2025-01-09 16:50:54,743 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 166 predicate places. [2025-01-09 16:50:54,743 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 238 transitions, 3620 flow [2025-01-09 16:50:54,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 16:50:54,743 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:54,744 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:50:54,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-01-09 16:50:54,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:54,944 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:50:54,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:54,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1499413465, now seen corresponding path program 6 times [2025-01-09 16:50:54,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:54,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850443205] [2025-01-09 16:50:54,945 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:50:54,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:54,949 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 17 statements into 2 equivalence classes. [2025-01-09 16:50:54,958 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 16:50:54,958 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-01-09 16:50:54,958 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:55,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:55,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:55,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850443205] [2025-01-09 16:50:55,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850443205] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:50:55,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786358373] [2025-01-09 16:50:55,054 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 16:50:55,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:55,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:50:55,056 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 16:50:55,059 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 16:50:55,114 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 17 statements into 2 equivalence classes. [2025-01-09 16:50:55,209 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 16:50:55,210 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-01-09 16:50:55,210 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:55,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-09 16:50:55,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:50:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:55,266 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:50:55,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:55,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786358373] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:50:55,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:50:55,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-01-09 16:50:55,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028870557] [2025-01-09 16:50:55,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:50:55,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-09 16:50:55,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:55,348 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-09 16:50:55,348 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2025-01-09 16:50:55,348 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:55,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 238 transitions, 3620 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 16:50:55,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:55,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:55,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:55,924 INFO L124 PetriNetUnfolderBase]: 570/1128 cut-off events. [2025-01-09 16:50:55,925 INFO L125 PetriNetUnfolderBase]: For 10500/10500 co-relation queries the response was YES. [2025-01-09 16:50:55,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7894 conditions, 1128 events. 570/1128 cut-off events. For 10500/10500 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6360 event pairs, 40 based on Foata normal form. 18/1146 useless extension candidates. Maximal degree in co-relation 7813. Up to 301 conditions per place. [2025-01-09 16:50:55,933 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 158 selfloop transitions, 158 changer transitions 0/317 dead transitions. [2025-01-09 16:50:55,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 317 transitions, 4923 flow [2025-01-09 16:50:55,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-01-09 16:50:55,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-01-09 16:50:55,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 197 transitions. [2025-01-09 16:50:55,934 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4282608695652174 [2025-01-09 16:50:55,934 INFO L175 Difference]: Start difference. First operand has 187 places, 238 transitions, 3620 flow. Second operand 23 states and 197 transitions. [2025-01-09 16:50:55,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 317 transitions, 4923 flow [2025-01-09 16:50:55,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 317 transitions, 4649 flow, removed 107 selfloop flow, removed 6 redundant places. [2025-01-09 16:50:55,993 INFO L231 Difference]: Finished difference. Result has 205 places, 241 transitions, 3763 flow [2025-01-09 16:50:55,993 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3283, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3763, PETRI_PLACES=205, PETRI_TRANSITIONS=241} [2025-01-09 16:50:55,993 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 184 predicate places. [2025-01-09 16:50:55,993 INFO L471 AbstractCegarLoop]: Abstraction has has 205 places, 241 transitions, 3763 flow [2025-01-09 16:50:55,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 16:50:55,994 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:55,994 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:50:56,001 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 16:50:56,194 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,SelfDestructingSolverStorable20 [2025-01-09 16:50:56,194 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:50:56,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:56,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1393654241, now seen corresponding path program 7 times [2025-01-09 16:50:56,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:56,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772680247] [2025-01-09 16:50:56,195 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 16:50:56,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:56,202 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-01-09 16:50:56,213 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 16:50:56,213 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:50:56,213 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:56,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:56,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:56,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772680247] [2025-01-09 16:50:56,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772680247] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:50:56,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165159651] [2025-01-09 16:50:56,335 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-09 16:50:56,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:56,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:50:56,338 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 16:50:56,340 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 16:50:56,399 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-01-09 16:50:56,515 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 16:50:56,515 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:50:56,515 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:56,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-09 16:50:56,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:50:56,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:56,557 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:50:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:56,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165159651] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:50:56,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:50:56,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2025-01-09 16:50:56,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146258668] [2025-01-09 16:50:56,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:50:56,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 16:50:56,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:56,601 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 16:50:56,601 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-01-09 16:50:56,601 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:56,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 241 transitions, 3763 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:50:56,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:56,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:56,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:50:57,082 INFO L124 PetriNetUnfolderBase]: 569/1117 cut-off events. [2025-01-09 16:50:57,082 INFO L125 PetriNetUnfolderBase]: For 9935/9935 co-relation queries the response was YES. [2025-01-09 16:50:57,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7960 conditions, 1117 events. 569/1117 cut-off events. For 9935/9935 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6212 event pairs, 34 based on Foata normal form. 6/1123 useless extension candidates. Maximal degree in co-relation 7876. Up to 379 conditions per place. [2025-01-09 16:50:57,093 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 160 selfloop transitions, 142 changer transitions 0/303 dead transitions. [2025-01-09 16:50:57,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 303 transitions, 4988 flow [2025-01-09 16:50:57,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-01-09 16:50:57,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-01-09 16:50:57,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 147 transitions. [2025-01-09 16:50:57,094 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.459375 [2025-01-09 16:50:57,094 INFO L175 Difference]: Start difference. First operand has 205 places, 241 transitions, 3763 flow. Second operand 16 states and 147 transitions. [2025-01-09 16:50:57,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 303 transitions, 4988 flow [2025-01-09 16:50:57,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 303 transitions, 4694 flow, removed 36 selfloop flow, removed 17 redundant places. [2025-01-09 16:50:57,155 INFO L231 Difference]: Finished difference. Result has 205 places, 249 transitions, 3922 flow [2025-01-09 16:50:57,155 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3427, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3922, PETRI_PLACES=205, PETRI_TRANSITIONS=249} [2025-01-09 16:50:57,156 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 184 predicate places. [2025-01-09 16:50:57,156 INFO L471 AbstractCegarLoop]: Abstraction has has 205 places, 249 transitions, 3922 flow [2025-01-09 16:50:57,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:50:57,156 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:50:57,156 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 16:50:57,164 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 16:50:57,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:57,357 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:50:57,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:50:57,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1074943354, now seen corresponding path program 1 times [2025-01-09 16:50:57,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:50:57,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596458626] [2025-01-09 16:50:57,358 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:50:57,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:50:57,363 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-01-09 16:50:57,370 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:50:57,370 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:50:57,370 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:57,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:50:57,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596458626] [2025-01-09 16:50:57,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596458626] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:50:57,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606935029] [2025-01-09 16:50:57,489 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:50:57,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:50:57,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:50:57,492 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 16:50:57,494 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 16:50:57,558 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-01-09 16:50:57,615 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:50:57,616 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:50:57,616 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:50:57,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-01-09 16:50:57,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:50:57,656 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 16:50:57,677 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 16:50:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:50:57,941 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:50:59,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:50:59,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606935029] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:50:59,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:50:59,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8] total 22 [2025-01-09 16:50:59,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534609508] [2025-01-09 16:50:59,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:50:59,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-01-09 16:50:59,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:50:59,237 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-01-09 16:50:59,237 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2025-01-09 16:50:59,237 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:50:59,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 249 transitions, 3922 flow. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:50:59,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:50:59,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:50:59,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:51:07,354 INFO L124 PetriNetUnfolderBase]: 847/1629 cut-off events. [2025-01-09 16:51:07,354 INFO L125 PetriNetUnfolderBase]: For 14959/14959 co-relation queries the response was YES. [2025-01-09 16:51:07,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11951 conditions, 1629 events. 847/1629 cut-off events. For 14959/14959 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 9634 event pairs, 11 based on Foata normal form. 9/1638 useless extension candidates. Maximal degree in co-relation 11839. Up to 381 conditions per place. [2025-01-09 16:51:07,366 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 202 selfloop transitions, 283 changer transitions 11/497 dead transitions. [2025-01-09 16:51:07,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 497 transitions, 7684 flow [2025-01-09 16:51:07,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-01-09 16:51:07,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2025-01-09 16:51:07,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 345 transitions. [2025-01-09 16:51:07,368 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2025-01-09 16:51:07,368 INFO L175 Difference]: Start difference. First operand has 205 places, 249 transitions, 3922 flow. Second operand 42 states and 345 transitions. [2025-01-09 16:51:07,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 497 transitions, 7684 flow [2025-01-09 16:51:07,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 497 transitions, 7469 flow, removed 37 selfloop flow, removed 5 redundant places. [2025-01-09 16:51:07,466 INFO L231 Difference]: Finished difference. Result has 253 places, 367 transitions, 6512 flow [2025-01-09 16:51:07,466 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3776, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=6512, PETRI_PLACES=253, PETRI_TRANSITIONS=367} [2025-01-09 16:51:07,467 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 232 predicate places. [2025-01-09 16:51:07,467 INFO L471 AbstractCegarLoop]: Abstraction has has 253 places, 367 transitions, 6512 flow [2025-01-09 16:51:07,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:51:07,467 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:51:07,467 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:51:07,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-01-09 16:51:07,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:51:07,671 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:51:07,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:51:07,672 INFO L85 PathProgramCache]: Analyzing trace with hash 628077000, now seen corresponding path program 9 times [2025-01-09 16:51:07,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:51:07,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724819725] [2025-01-09 16:51:07,672 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:51:07,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:51:07,676 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:51:07,698 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:51:07,698 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:51:07,698 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:51:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:51:07,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:51:07,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724819725] [2025-01-09 16:51:07,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724819725] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:51:07,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23624267] [2025-01-09 16:51:07,966 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:51:07,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:51:07,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:51:07,969 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 16:51:07,971 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 16:51:08,031 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:51:08,081 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:51:08,081 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 16:51:08,081 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:51:08,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-01-09 16:51:08,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:51:08,340 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 16:51:08,341 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 23 [2025-01-09 16:51:08,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:51:08,365 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:51:09,393 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-01-09 16:51:09,393 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 77 [2025-01-09 16:51:09,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:51:09,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23624267] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:51:09,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:51:09,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 20 [2025-01-09 16:51:09,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488748842] [2025-01-09 16:51:09,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:51:09,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-01-09 16:51:09,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:51:09,471 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-01-09 16:51:09,471 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2025-01-09 16:51:09,471 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:51:09,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 367 transitions, 6512 flow. Second operand has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:51:09,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:51:09,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:51:09,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:51:12,268 INFO L124 PetriNetUnfolderBase]: 992/1903 cut-off events. [2025-01-09 16:51:12,269 INFO L125 PetriNetUnfolderBase]: For 22840/22840 co-relation queries the response was YES. [2025-01-09 16:51:12,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15334 conditions, 1903 events. 992/1903 cut-off events. For 22840/22840 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 11708 event pairs, 15 based on Foata normal form. 5/1908 useless extension candidates. Maximal degree in co-relation 15197. Up to 470 conditions per place. [2025-01-09 16:51:12,285 INFO L140 encePairwiseOnDemand]: 9/20 looper letters, 128 selfloop transitions, 357 changer transitions 11/497 dead transitions. [2025-01-09 16:51:12,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 497 transitions, 9276 flow [2025-01-09 16:51:12,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-01-09 16:51:12,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-01-09 16:51:12,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 213 transitions. [2025-01-09 16:51:12,287 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4096153846153846 [2025-01-09 16:51:12,287 INFO L175 Difference]: Start difference. First operand has 253 places, 367 transitions, 6512 flow. Second operand 26 states and 213 transitions. [2025-01-09 16:51:12,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 497 transitions, 9276 flow [2025-01-09 16:51:12,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 497 transitions, 8641 flow, removed 250 selfloop flow, removed 10 redundant places. [2025-01-09 16:51:12,460 INFO L231 Difference]: Finished difference. Result has 275 places, 444 transitions, 8638 flow [2025-01-09 16:51:12,460 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=6088, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=8638, PETRI_PLACES=275, PETRI_TRANSITIONS=444} [2025-01-09 16:51:12,461 INFO L279 CegarLoopForPetriNet]: 21 programPoint places, 254 predicate places. [2025-01-09 16:51:12,461 INFO L471 AbstractCegarLoop]: Abstraction has has 275 places, 444 transitions, 8638 flow [2025-01-09 16:51:12,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:51:12,461 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:51:12,461 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:51:12,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-01-09 16:51:12,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:51:12,666 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-09 16:51:12,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:51:12,666 INFO L85 PathProgramCache]: Analyzing trace with hash -2054900460, now seen corresponding path program 10 times [2025-01-09 16:51:12,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:51:12,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361650188] [2025-01-09 16:51:12,666 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:51:12,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:51:12,672 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:51:12,688 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:51:12,688 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:51:12,688 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:51:13,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:51:13,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:51:13,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361650188] [2025-01-09 16:51:13,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361650188] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:51:13,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689253620] [2025-01-09 16:51:13,375 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 16:51:13,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:51:13,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:51:13,378 INFO L229 MonitoredProcess]: Starting monitored process 19 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 16:51:13,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-01-09 16:51:13,444 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-01-09 16:51:13,483 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 16:51:13,484 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 16:51:13,484 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:51:13,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-01-09 16:51:13,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:51:13,694 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 16:51:13,697 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 25 [2025-01-09 16:51:13,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:51:13,701 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:51:14,598 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2025-01-09 16:51:14,598 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 77 [2025-01-09 16:51:14,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 16:51:14,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689253620] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:51:14,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:51:14,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 23 [2025-01-09 16:51:14,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132919648] [2025-01-09 16:51:14,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:51:14,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-01-09 16:51:14,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:51:14,697 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-01-09 16:51:14,697 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2025-01-09 16:51:14,697 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2025-01-09 16:51:14,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 444 transitions, 8638 flow. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:51:14,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:51:14,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2025-01-09 16:51:14,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand