./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/stack_longer-2.i --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/pthread/stack_longer-2.i -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 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 16:21:43,957 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 16:21:44,014 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 16:21:44,019 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 16:21:44,021 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 16:21:44,044 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 16:21:44,045 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 16:21:44,045 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 16:21:44,045 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 16:21:44,045 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 16:21:44,046 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 16:21:44,046 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 16:21:44,046 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 16:21:44,046 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 16:21:44,047 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 16:21:44,047 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 16:21:44,047 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 16:21:44,047 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 16:21:44,047 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 16:21:44,047 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 16:21:44,047 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 16:21:44,047 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 16:21:44,047 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 16:21:44,047 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 16:21:44,047 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 16:21:44,047 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 16:21:44,048 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 16:21:44,048 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 16:21:44,048 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 16:21:44,048 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 16:21:44,048 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 16:21:44,048 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 16:21:44,048 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:21:44,048 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 16:21:44,048 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 16:21:44,048 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 16:21:44,048 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 16:21:44,048 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:21:44,048 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 16:21:44,048 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 16:21:44,048 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 16:21:44,049 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 16:21:44,049 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 16:21:44,049 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 16:21:44,049 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 16:21:44,049 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 16:21:44,049 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 16:21:44,049 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 16:21:44,049 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 -> 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 [2025-01-09 16:21:44,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 16:21:44,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 16:21:44,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 16:21:44,284 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 16:21:44,284 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 16:21:44,286 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/stack_longer-2.i [2025-01-09 16:21:45,386 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9ead5bc97/5b5aae2af2ce4360966a8a3e01da51fc/FLAGd5a7c36a3 [2025-01-09 16:21:45,727 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 16:21:45,727 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread/stack_longer-2.i [2025-01-09 16:21:45,740 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9ead5bc97/5b5aae2af2ce4360966a8a3e01da51fc/FLAGd5a7c36a3 [2025-01-09 16:21:45,750 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9ead5bc97/5b5aae2af2ce4360966a8a3e01da51fc [2025-01-09 16:21:45,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 16:21:45,753 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 16:21:45,755 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 16:21:45,755 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 16:21:45,758 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 16:21:45,758 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:21:45" (1/1) ... [2025-01-09 16:21:45,759 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7abf173e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:45, skipping insertion in model container [2025-01-09 16:21:45,759 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 04:21:45" (1/1) ... [2025-01-09 16:21:45,795 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 16:21:46,001 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/pthread/stack_longer-2.i[41529,41542] [2025-01-09 16:21:46,021 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 16:21:46,045 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 16:21:46,086 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/pthread/stack_longer-2.i[41529,41542] [2025-01-09 16:21:46,093 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 16:21:46,149 INFO L204 MainTranslator]: Completed translation [2025-01-09 16:21:46,150 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:46 WrapperNode [2025-01-09 16:21:46,150 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 16:21:46,151 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 16:21:46,151 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 16:21:46,151 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 16:21:46,155 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:46" (1/1) ... [2025-01-09 16:21:46,176 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:46" (1/1) ... [2025-01-09 16:21:46,213 INFO L138 Inliner]: procedures = 277, calls = 430, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 539 [2025-01-09 16:21:46,213 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 16:21:46,214 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 16:21:46,214 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 16:21:46,214 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 16:21:46,220 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:46" (1/1) ... [2025-01-09 16:21:46,221 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:46" (1/1) ... [2025-01-09 16:21:46,230 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:46" (1/1) ... [2025-01-09 16:21:46,254 INFO L175 MemorySlicer]: Split 409 memory accesses to 3 slices as follows [2, 5, 402]. 98 percent of accesses are in the largest equivalence class. The 407 initializations are split as follows [2, 5, 400]. The 1 writes are split as follows [0, 0, 1]. [2025-01-09 16:21:46,254 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:46" (1/1) ... [2025-01-09 16:21:46,255 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:46" (1/1) ... [2025-01-09 16:21:46,277 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:46" (1/1) ... [2025-01-09 16:21:46,278 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:46" (1/1) ... [2025-01-09 16:21:46,281 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:46" (1/1) ... [2025-01-09 16:21:46,287 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:46" (1/1) ... [2025-01-09 16:21:46,288 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:46" (1/1) ... [2025-01-09 16:21:46,291 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 16:21:46,295 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 16:21:46,295 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 16:21:46,295 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 16:21:46,296 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:46" (1/1) ... [2025-01-09 16:21:46,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 16:21:46,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:21:46,320 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 16:21:46,323 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 16:21:46,339 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-01-09 16:21:46,339 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-01-09 16:21:46,340 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-01-09 16:21:46,340 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-01-09 16:21:46,340 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-01-09 16:21:46,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-09 16:21:46,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-09 16:21:46,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-01-09 16:21:46,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-09 16:21:46,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-09 16:21:46,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-01-09 16:21:46,340 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-01-09 16:21:46,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 16:21:46,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 16:21:46,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-09 16:21:46,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-01-09 16:21:46,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 16:21:46,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 16:21:46,342 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 16:21:46,451 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 16:21:46,453 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 16:21:47,117 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-09 16:21:47,118 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 16:21:49,928 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 16:21:49,929 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-09 16:21:49,929 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:21:49 BoogieIcfgContainer [2025-01-09 16:21:49,929 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 16:21:49,930 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 16:21:49,930 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 16:21:49,933 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 16:21:49,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 04:21:45" (1/3) ... [2025-01-09 16:21:49,934 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf8208e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:21:49, skipping insertion in model container [2025-01-09 16:21:49,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 04:21:46" (2/3) ... [2025-01-09 16:21:49,934 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf8208e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 04:21:49, skipping insertion in model container [2025-01-09 16:21:49,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 04:21:49" (3/3) ... [2025-01-09 16:21:49,935 INFO L128 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2025-01-09 16:21:49,945 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 16:21:49,946 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG stack_longer-2.i that has 3 procedures, 30 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2025-01-09 16:21:49,947 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-09 16:21:49,987 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-01-09 16:21:50,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 34 transitions, 82 flow [2025-01-09 16:21:50,119 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2025-01-09 16:21:50,120 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-09 16:21:50,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 5/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 61 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 29. Up to 3 conditions per place. [2025-01-09 16:21:50,122 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 34 transitions, 82 flow [2025-01-09 16:21:50,123 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 30 transitions, 69 flow [2025-01-09 16:21:50,130 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 16:21:50,141 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;@68952c3c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 16:21:50,141 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-01-09 16:21:50,160 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-09 16:21:50,160 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2025-01-09 16:21:50,160 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-01-09 16:21:50,160 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:21:50,161 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:21:50,161 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-01-09 16:21:50,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:21:50,165 INFO L85 PathProgramCache]: Analyzing trace with hash 417582979, now seen corresponding path program 1 times [2025-01-09 16:21:50,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:21:50,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811585318] [2025-01-09 16:21:50,172 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:21:50,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:21:50,254 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-01-09 16:21:50,348 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-01-09 16:21:50,348 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:21:50,348 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:21:50,736 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 16:21:50,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:21:50,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811585318] [2025-01-09 16:21:50,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811585318] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:21:50,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:21:50,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-09 16:21:50,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311050164] [2025-01-09 16:21:50,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:21:50,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 16:21:50,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:21:50,765 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 16:21:50,766 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 16:21:50,772 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-01-09 16:21:50,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 69 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:21:50,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:21:50,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-01-09 16:21:50,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:21:50,953 INFO L124 PetriNetUnfolderBase]: 307/576 cut-off events. [2025-01-09 16:21:50,954 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2025-01-09 16:21:50,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1132 conditions, 576 events. 307/576 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2575 event pairs, 53 based on Foata normal form. 43/582 useless extension candidates. Maximal degree in co-relation 1055. Up to 358 conditions per place. [2025-01-09 16:21:50,962 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 41 selfloop transitions, 3 changer transitions 2/52 dead transitions. [2025-01-09 16:21:50,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 52 transitions, 214 flow [2025-01-09 16:21:50,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 16:21:50,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-09 16:21:50,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2025-01-09 16:21:50,972 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6102941176470589 [2025-01-09 16:21:50,973 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 69 flow. Second operand 4 states and 83 transitions. [2025-01-09 16:21:50,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 52 transitions, 214 flow [2025-01-09 16:21:50,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 52 transitions, 205 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-09 16:21:50,981 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 82 flow [2025-01-09 16:21:50,983 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2025-01-09 16:21:50,985 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2025-01-09 16:21:50,986 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 82 flow [2025-01-09 16:21:50,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 16:21:50,986 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:21:50,987 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:21:50,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 16:21:50,988 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-01-09 16:21:50,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:21:50,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1156275874, now seen corresponding path program 1 times [2025-01-09 16:21:50,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:21:50,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64688963] [2025-01-09 16:21:50,989 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:21:50,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:21:51,007 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-09 16:21:51,029 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-09 16:21:51,029 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:21:51,029 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:21:51,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:21:51,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:21:51,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64688963] [2025-01-09 16:21:51,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64688963] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:21:51,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074073421] [2025-01-09 16:21:51,300 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:21:51,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:21:51,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:21:51,302 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 16:21:51,304 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 16:21:51,378 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-09 16:21:51,476 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-09 16:21:51,476 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:21:51,476 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:21:51,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-01-09 16:21:51,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:21:51,529 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 8 treesize of output 1 [2025-01-09 16:21:51,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:21:51,603 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:21:51,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:21:51,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074073421] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:21:51,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:21:51,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-01-09 16:21:51,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041999599] [2025-01-09 16:21:51,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:21:51,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-09 16:21:51,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:21:51,665 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-09 16:21:51,665 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2025-01-09 16:21:51,668 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-01-09 16:21:51,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 82 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 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 16:21:51,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:21:51,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-01-09 16:21:51,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:21:52,178 INFO L124 PetriNetUnfolderBase]: 1257/2340 cut-off events. [2025-01-09 16:21:52,179 INFO L125 PetriNetUnfolderBase]: For 301/303 co-relation queries the response was YES. [2025-01-09 16:21:52,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4928 conditions, 2340 events. 1257/2340 cut-off events. For 301/303 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 12444 event pairs, 153 based on Foata normal form. 49/2288 useless extension candidates. Maximal degree in co-relation 4364. Up to 365 conditions per place. [2025-01-09 16:21:52,197 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 163 selfloop transitions, 32 changer transitions 4/204 dead transitions. [2025-01-09 16:21:52,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 204 transitions, 900 flow [2025-01-09 16:21:52,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-01-09 16:21:52,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-01-09 16:21:52,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 313 transitions. [2025-01-09 16:21:52,199 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6137254901960785 [2025-01-09 16:21:52,199 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 82 flow. Second operand 15 states and 313 transitions. [2025-01-09 16:21:52,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 204 transitions, 900 flow [2025-01-09 16:21:52,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 204 transitions, 896 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-09 16:21:52,205 INFO L231 Difference]: Finished difference. Result has 54 places, 66 transitions, 329 flow [2025-01-09 16:21:52,206 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=329, PETRI_PLACES=54, PETRI_TRANSITIONS=66} [2025-01-09 16:21:52,206 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 22 predicate places. [2025-01-09 16:21:52,206 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 66 transitions, 329 flow [2025-01-09 16:21:52,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 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 16:21:52,207 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:21:52,207 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:21:52,215 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 16:21:52,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:21:52,408 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-01-09 16:21:52,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:21:52,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1858066851, now seen corresponding path program 1 times [2025-01-09 16:21:52,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:21:52,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610429573] [2025-01-09 16:21:52,409 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:21:52,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:21:52,435 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-09 16:21:52,516 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-09 16:21:52,517 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:21:52,517 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:21:52,688 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 16:21:52,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:21:52,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610429573] [2025-01-09 16:21:52,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610429573] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:21:52,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:21:52,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-09 16:21:52,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412054951] [2025-01-09 16:21:52,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:21:52,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 16:21:52,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:21:52,690 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 16:21:52,691 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 16:21:52,691 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-01-09 16:21:52,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 66 transitions, 329 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 16:21:52,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:21:52,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-01-09 16:21:52,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:21:52,886 INFO L124 PetriNetUnfolderBase]: 669/1355 cut-off events. [2025-01-09 16:21:52,886 INFO L125 PetriNetUnfolderBase]: For 603/603 co-relation queries the response was YES. [2025-01-09 16:21:52,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3066 conditions, 1355 events. 669/1355 cut-off events. For 603/603 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 6868 event pairs, 231 based on Foata normal form. 66/1406 useless extension candidates. Maximal degree in co-relation 2918. Up to 634 conditions per place. [2025-01-09 16:21:52,895 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 43 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2025-01-09 16:21:52,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 59 transitions, 339 flow [2025-01-09 16:21:52,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 16:21:52,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-09 16:21:52,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2025-01-09 16:21:52,897 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5686274509803921 [2025-01-09 16:21:52,897 INFO L175 Difference]: Start difference. First operand has 54 places, 66 transitions, 329 flow. Second operand 3 states and 58 transitions. [2025-01-09 16:21:52,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 59 transitions, 339 flow [2025-01-09 16:21:52,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 307 flow, removed 16 selfloop flow, removed 3 redundant places. [2025-01-09 16:21:52,904 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 198 flow [2025-01-09 16:21:52,904 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2025-01-09 16:21:52,904 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 18 predicate places. [2025-01-09 16:21:52,904 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 198 flow [2025-01-09 16:21:52,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 16:21:52,905 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:21:52,905 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:21:52,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-09 16:21:52,905 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-01-09 16:21:52,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:21:52,906 INFO L85 PathProgramCache]: Analyzing trace with hash 926635314, now seen corresponding path program 1 times [2025-01-09 16:21:52,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:21:52,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422072470] [2025-01-09 16:21:52,906 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:21:52,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:21:52,922 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-01-09 16:21:52,962 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 16:21:52,962 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:21:52,963 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:21:53,873 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 16:21:53,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:21:53,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422072470] [2025-01-09 16:21:53,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422072470] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 16:21:53,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 16:21:53,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-09 16:21:53,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227252573] [2025-01-09 16:21:53,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:21:53,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 16:21:53,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:21:53,875 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 16:21:53,875 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-09 16:21:53,880 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-01-09 16:21:53,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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 16:21:53,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:21:53,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-01-09 16:21:53,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:21:54,147 INFO L124 PetriNetUnfolderBase]: 840/1700 cut-off events. [2025-01-09 16:21:54,148 INFO L125 PetriNetUnfolderBase]: For 579/579 co-relation queries the response was YES. [2025-01-09 16:21:54,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3884 conditions, 1700 events. 840/1700 cut-off events. For 579/579 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8915 event pairs, 260 based on Foata normal form. 0/1681 useless extension candidates. Maximal degree in co-relation 3504. Up to 971 conditions per place. [2025-01-09 16:21:54,157 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 61 selfloop transitions, 7 changer transitions 4/84 dead transitions. [2025-01-09 16:21:54,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 84 transitions, 451 flow [2025-01-09 16:21:54,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 16:21:54,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-09 16:21:54,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2025-01-09 16:21:54,158 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5705882352941176 [2025-01-09 16:21:54,158 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 198 flow. Second operand 5 states and 97 transitions. [2025-01-09 16:21:54,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 84 transitions, 451 flow [2025-01-09 16:21:54,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 84 transitions, 440 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-09 16:21:54,162 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 254 flow [2025-01-09 16:21:54,162 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2025-01-09 16:21:54,163 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 24 predicate places. [2025-01-09 16:21:54,163 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 254 flow [2025-01-09 16:21:54,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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 16:21:54,163 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:21:54,163 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:21:54,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-01-09 16:21:54,164 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-01-09 16:21:54,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:21:54,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1732030135, now seen corresponding path program 1 times [2025-01-09 16:21:54,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:21:54,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735180326] [2025-01-09 16:21:54,164 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:21:54,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:21:54,181 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-01-09 16:21:54,215 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-01-09 16:21:54,217 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:21:54,217 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:21:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:21:54,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:21:54,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735180326] [2025-01-09 16:21:54,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735180326] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:21:54,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304642796] [2025-01-09 16:21:54,881 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:21:54,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:21:54,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:21:54,883 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 16:21:54,885 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 16:21:54,948 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-01-09 16:21:55,046 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-01-09 16:21:55,046 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:21:55,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:21:55,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-01-09 16:21:55,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:21:55,084 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 8 treesize of output 1 [2025-01-09 16:21:55,150 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 25 treesize of output 1 [2025-01-09 16:21:55,281 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 80 treesize of output 32 [2025-01-09 16:21:55,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:21:55,326 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:21:55,603 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 9 treesize of output 1 [2025-01-09 16:21:55,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:21:55,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304642796] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:21:55,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:21:55,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2025-01-09 16:21:55,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132690961] [2025-01-09 16:21:55,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:21:55,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-09 16:21:55,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:21:55,647 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-09 16:21:55,647 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-01-09 16:21:55,651 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-01-09 16:21:55,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 254 flow. Second operand has 14 states, 14 states have (on average 10.857142857142858) internal successors, (152), 14 states have internal predecessors, (152), 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 16:21:55,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:21:55,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-01-09 16:21:55,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:21:56,622 INFO L124 PetriNetUnfolderBase]: 1747/3464 cut-off events. [2025-01-09 16:21:56,622 INFO L125 PetriNetUnfolderBase]: For 1581/1581 co-relation queries the response was YES. [2025-01-09 16:21:56,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7901 conditions, 3464 events. 1747/3464 cut-off events. For 1581/1581 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 18907 event pairs, 341 based on Foata normal form. 14/3413 useless extension candidates. Maximal degree in co-relation 6810. Up to 566 conditions per place. [2025-01-09 16:21:56,642 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 201 selfloop transitions, 52 changer transitions 18/276 dead transitions. [2025-01-09 16:21:56,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 276 transitions, 1488 flow [2025-01-09 16:21:56,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-01-09 16:21:56,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-01-09 16:21:56,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 413 transitions. [2025-01-09 16:21:56,645 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5521390374331551 [2025-01-09 16:21:56,645 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 254 flow. Second operand 22 states and 413 transitions. [2025-01-09 16:21:56,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 276 transitions, 1488 flow [2025-01-09 16:21:56,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 276 transitions, 1480 flow, removed 3 selfloop flow, removed 1 redundant places. [2025-01-09 16:21:56,655 INFO L231 Difference]: Finished difference. Result has 81 places, 89 transitions, 542 flow [2025-01-09 16:21:56,655 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=542, PETRI_PLACES=81, PETRI_TRANSITIONS=89} [2025-01-09 16:21:56,655 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 49 predicate places. [2025-01-09 16:21:56,655 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 89 transitions, 542 flow [2025-01-09 16:21:56,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.857142857142858) internal successors, (152), 14 states have internal predecessors, (152), 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 16:21:56,656 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:21:56,656 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:21:56,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-09 16:21:56,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:21:56,857 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-01-09 16:21:56,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:21:56,857 INFO L85 PathProgramCache]: Analyzing trace with hash 839682202, now seen corresponding path program 1 times [2025-01-09 16:21:56,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:21:56,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715224792] [2025-01-09 16:21:56,857 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:21:56,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:21:56,873 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-01-09 16:21:56,886 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-01-09 16:21:56,886 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:21:56,886 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:21:57,104 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 16:21:57,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:21:57,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715224792] [2025-01-09 16:21:57,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715224792] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:21:57,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174700555] [2025-01-09 16:21:57,105 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:21:57,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:21:57,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:21:57,107 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 16:21:57,109 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 16:21:57,177 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-01-09 16:21:57,280 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-01-09 16:21:57,280 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:21:57,280 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:21:57,283 INFO L256 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-09 16:21:57,288 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:21:57,309 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 8 treesize of output 1 [2025-01-09 16:21:57,351 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 8 treesize of output 1 [2025-01-09 16:21:57,495 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 16:21:57,495 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:21:57,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:21:57,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174700555] provided 1 perfect and 1 imperfect interpolant sequences [2025-01-09 16:21:57,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-01-09 16:21:57,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 12 [2025-01-09 16:21:57,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919743085] [2025-01-09 16:21:57,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 16:21:57,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 16:21:57,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:21:57,536 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 16:21:57,537 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2025-01-09 16:21:57,543 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-01-09 16:21:57,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 89 transitions, 542 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 16:21:57,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:21:57,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-01-09 16:21:57,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:21:57,931 INFO L124 PetriNetUnfolderBase]: 2062/4114 cut-off events. [2025-01-09 16:21:57,931 INFO L125 PetriNetUnfolderBase]: For 3655/3655 co-relation queries the response was YES. [2025-01-09 16:21:57,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9905 conditions, 4114 events. 2062/4114 cut-off events. For 3655/3655 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 23867 event pairs, 425 based on Foata normal form. 24/4108 useless extension candidates. Maximal degree in co-relation 9267. Up to 1663 conditions per place. [2025-01-09 16:21:57,955 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 81 selfloop transitions, 50 changer transitions 2/138 dead transitions. [2025-01-09 16:21:57,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 138 transitions, 993 flow [2025-01-09 16:21:57,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 16:21:57,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-09 16:21:57,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2025-01-09 16:21:57,956 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5490196078431373 [2025-01-09 16:21:57,957 INFO L175 Difference]: Start difference. First operand has 81 places, 89 transitions, 542 flow. Second operand 6 states and 112 transitions. [2025-01-09 16:21:57,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 138 transitions, 993 flow [2025-01-09 16:21:57,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 138 transitions, 969 flow, removed 12 selfloop flow, removed 0 redundant places. [2025-01-09 16:21:57,973 INFO L231 Difference]: Finished difference. Result has 88 places, 101 transitions, 751 flow [2025-01-09 16:21:57,974 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=751, PETRI_PLACES=88, PETRI_TRANSITIONS=101} [2025-01-09 16:21:57,975 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 56 predicate places. [2025-01-09 16:21:57,975 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 101 transitions, 751 flow [2025-01-09 16:21:57,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 16:21:57,976 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:21:57,976 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:21:57,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-09 16:21:58,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:21:58,177 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-01-09 16:21:58,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:21:58,177 INFO L85 PathProgramCache]: Analyzing trace with hash 411607294, now seen corresponding path program 1 times [2025-01-09 16:21:58,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:21:58,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791284938] [2025-01-09 16:21:58,177 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:21:58,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:21:58,191 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-01-09 16:21:58,234 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-01-09 16:21:58,234 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:21:58,234 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:21:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:21:58,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:21:58,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791284938] [2025-01-09 16:21:58,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791284938] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:21:58,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090798134] [2025-01-09 16:21:58,936 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:21:58,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:21:58,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:21:58,938 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 16:21:58,940 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 16:21:59,014 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-01-09 16:21:59,115 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-01-09 16:21:59,115 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:21:59,115 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:21:59,119 INFO L256 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-01-09 16:21:59,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:21:59,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-01-09 16:21:59,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 50 treesize of output 19 [2025-01-09 16:21:59,361 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 56 treesize of output 32 [2025-01-09 16:21:59,389 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:21:59,390 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:21:59,783 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 16:21:59,784 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 1 case distinctions, treesize of input 18 treesize of output 14 [2025-01-09 16:21:59,812 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2025-01-09 16:21:59,813 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 78 treesize of output 65 [2025-01-09 16:21:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:21:59,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090798134] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:21:59,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:21:59,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-01-09 16:21:59,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348897760] [2025-01-09 16:21:59,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:21:59,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-09 16:21:59,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:21:59,871 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-09 16:21:59,872 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2025-01-09 16:21:59,874 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-01-09 16:21:59,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 101 transitions, 751 flow. Second operand has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 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 16:21:59,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:21:59,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-01-09 16:21:59,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:22:01,708 INFO L124 PetriNetUnfolderBase]: 4046/8044 cut-off events. [2025-01-09 16:22:01,709 INFO L125 PetriNetUnfolderBase]: For 11279/11279 co-relation queries the response was YES. [2025-01-09 16:22:01,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20343 conditions, 8044 events. 4046/8044 cut-off events. For 11279/11279 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 49075 event pairs, 950 based on Foata normal form. 56/8070 useless extension candidates. Maximal degree in co-relation 19195. Up to 1343 conditions per place. [2025-01-09 16:22:01,758 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 226 selfloop transitions, 123 changer transitions 36/390 dead transitions. [2025-01-09 16:22:01,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 390 transitions, 2865 flow [2025-01-09 16:22:01,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-01-09 16:22:01,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-01-09 16:22:01,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 450 transitions. [2025-01-09 16:22:01,761 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5294117647058824 [2025-01-09 16:22:01,761 INFO L175 Difference]: Start difference. First operand has 88 places, 101 transitions, 751 flow. Second operand 25 states and 450 transitions. [2025-01-09 16:22:01,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 390 transitions, 2865 flow [2025-01-09 16:22:01,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 390 transitions, 2777 flow, removed 32 selfloop flow, removed 1 redundant places. [2025-01-09 16:22:01,792 INFO L231 Difference]: Finished difference. Result has 122 places, 169 transitions, 1719 flow [2025-01-09 16:22:01,792 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1719, PETRI_PLACES=122, PETRI_TRANSITIONS=169} [2025-01-09 16:22:01,792 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 90 predicate places. [2025-01-09 16:22:01,793 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 169 transitions, 1719 flow [2025-01-09 16:22:01,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 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 16:22:01,793 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:22:01,793 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2025-01-09 16:22:01,801 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 16:22:01,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-01-09 16:22:01,997 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-01-09 16:22:01,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:22:01,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1913686673, now seen corresponding path program 2 times [2025-01-09 16:22:01,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:22:01,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807428161] [2025-01-09 16:22:01,998 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:22:01,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:22:02,020 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-01-09 16:22:02,041 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-01-09 16:22:02,044 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:22:02,044 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:22:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:22:02,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:22:02,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807428161] [2025-01-09 16:22:02,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807428161] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:22:02,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039327596] [2025-01-09 16:22:02,336 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:22:02,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:22:02,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:22:02,338 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 16:22:02,340 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 16:22:02,416 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-01-09 16:22:02,515 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-01-09 16:22:02,515 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:22:02,515 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:22:02,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-09 16:22:02,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:22:02,541 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 8 treesize of output 1 [2025-01-09 16:22:02,592 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 8 treesize of output 1 [2025-01-09 16:22:02,629 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 8 treesize of output 1 [2025-01-09 16:22:02,666 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 8 treesize of output 1 [2025-01-09 16:22:02,718 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:22:02,718 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:22:02,819 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:22:02,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039327596] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:22:02,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:22:02,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2025-01-09 16:22:02,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294123236] [2025-01-09 16:22:02,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:22:02,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-01-09 16:22:02,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:22:02,822 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-01-09 16:22:02,822 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2025-01-09 16:22:02,824 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-01-09 16:22:02,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 169 transitions, 1719 flow. Second operand has 23 states, 23 states have (on average 10.304347826086957) internal successors, (237), 23 states have internal predecessors, (237), 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 16:22:02,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:22:02,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-01-09 16:22:02,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:22:05,645 INFO L124 PetriNetUnfolderBase]: 10636/20779 cut-off events. [2025-01-09 16:22:05,645 INFO L125 PetriNetUnfolderBase]: For 53576/53576 co-relation queries the response was YES. [2025-01-09 16:22:05,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58360 conditions, 20779 events. 10636/20779 cut-off events. For 53576/53576 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 150726 event pairs, 1949 based on Foata normal form. 326/21103 useless extension candidates. Maximal degree in co-relation 56400. Up to 3450 conditions per place. [2025-01-09 16:22:05,860 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 565 selfloop transitions, 369 changer transitions 20/959 dead transitions. [2025-01-09 16:22:05,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 959 transitions, 8466 flow [2025-01-09 16:22:05,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2025-01-09 16:22:05,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2025-01-09 16:22:05,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 1074 transitions. [2025-01-09 16:22:05,864 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5264705882352941 [2025-01-09 16:22:05,864 INFO L175 Difference]: Start difference. First operand has 122 places, 169 transitions, 1719 flow. Second operand 60 states and 1074 transitions. [2025-01-09 16:22:05,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 959 transitions, 8466 flow [2025-01-09 16:22:06,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 959 transitions, 8312 flow, removed 75 selfloop flow, removed 1 redundant places. [2025-01-09 16:22:06,102 INFO L231 Difference]: Finished difference. Result has 196 places, 444 transitions, 5607 flow [2025-01-09 16:22:06,103 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1677, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=5607, PETRI_PLACES=196, PETRI_TRANSITIONS=444} [2025-01-09 16:22:06,104 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 164 predicate places. [2025-01-09 16:22:06,104 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 444 transitions, 5607 flow [2025-01-09 16:22:06,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.304347826086957) internal successors, (237), 23 states have internal predecessors, (237), 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 16:22:06,104 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:22:06,105 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:22:06,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-01-09 16:22:06,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:22:06,305 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-01-09 16:22:06,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:22:06,306 INFO L85 PathProgramCache]: Analyzing trace with hash 120829186, now seen corresponding path program 2 times [2025-01-09 16:22:06,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:22:06,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706667830] [2025-01-09 16:22:06,306 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:22:06,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:22:06,324 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-01-09 16:22:06,366 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-01-09 16:22:06,369 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:22:06,369 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:22:07,620 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:22:07,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:22:07,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706667830] [2025-01-09 16:22:07,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706667830] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:22:07,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302999263] [2025-01-09 16:22:07,621 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 16:22:07,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:22:07,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:22:07,624 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 16:22:07,626 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 16:22:07,704 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-01-09 16:22:07,814 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-01-09 16:22:07,814 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 16:22:07,814 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:22:07,818 INFO L256 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-01-09 16:22:07,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:22:07,846 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 16:22:07,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 34 treesize of output 14 [2025-01-09 16:22:07,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 34 treesize of output 14 [2025-01-09 16:22:08,112 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 56 treesize of output 32 [2025-01-09 16:22:08,154 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:22:08,154 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:22:08,669 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:22:08,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302999263] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:22:08,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:22:08,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 27 [2025-01-09 16:22:08,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651613311] [2025-01-09 16:22:08,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:22:08,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-01-09 16:22:08,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:22:08,672 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-01-09 16:22:08,672 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2025-01-09 16:22:08,676 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-01-09 16:22:08,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 444 transitions, 5607 flow. Second operand has 27 states, 27 states have (on average 10.666666666666666) internal successors, (288), 27 states have internal predecessors, (288), 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 16:22:08,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:22:08,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-01-09 16:22:08,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:22:15,654 INFO L124 PetriNetUnfolderBase]: 21171/41106 cut-off events. [2025-01-09 16:22:15,654 INFO L125 PetriNetUnfolderBase]: For 182111/182111 co-relation queries the response was YES. [2025-01-09 16:22:16,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125614 conditions, 41106 events. 21171/41106 cut-off events. For 182111/182111 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 317712 event pairs, 4067 based on Foata normal form. 448/41552 useless extension candidates. Maximal degree in co-relation 123445. Up to 9831 conditions per place. [2025-01-09 16:22:16,181 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 512 selfloop transitions, 623 changer transitions 26/1166 dead transitions. [2025-01-09 16:22:16,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 1166 transitions, 14972 flow [2025-01-09 16:22:16,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-01-09 16:22:16,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-01-09 16:22:16,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 581 transitions. [2025-01-09 16:22:16,183 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5025951557093425 [2025-01-09 16:22:16,183 INFO L175 Difference]: Start difference. First operand has 196 places, 444 transitions, 5607 flow. Second operand 34 states and 581 transitions. [2025-01-09 16:22:16,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 1166 transitions, 14972 flow [2025-01-09 16:22:17,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 1166 transitions, 13504 flow, removed 734 selfloop flow, removed 0 redundant places. [2025-01-09 16:22:17,347 INFO L231 Difference]: Finished difference. Result has 255 places, 846 transitions, 12085 flow [2025-01-09 16:22:17,348 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=5031, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=12085, PETRI_PLACES=255, PETRI_TRANSITIONS=846} [2025-01-09 16:22:17,348 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 223 predicate places. [2025-01-09 16:22:17,348 INFO L471 AbstractCegarLoop]: Abstraction has has 255 places, 846 transitions, 12085 flow [2025-01-09 16:22:17,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 10.666666666666666) internal successors, (288), 27 states have internal predecessors, (288), 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 16:22:17,348 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:22:17,348 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:22:17,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-01-09 16:22:17,549 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-01-09 16:22:17,549 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-01-09 16:22:17,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:22:17,550 INFO L85 PathProgramCache]: Analyzing trace with hash 2072346442, now seen corresponding path program 1 times [2025-01-09 16:22:17,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:22:17,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7356341] [2025-01-09 16:22:17,550 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:22:17,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:22:17,568 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-01-09 16:22:17,579 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-01-09 16:22:17,579 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:22:17,579 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:22:18,117 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:22:18,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:22:18,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7356341] [2025-01-09 16:22:18,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7356341] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:22:18,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833173333] [2025-01-09 16:22:18,118 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 16:22:18,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:22:18,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:22:18,120 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 16:22:18,122 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 16:22:18,205 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-01-09 16:22:18,294 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-01-09 16:22:18,294 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 16:22:18,295 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:22:18,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-09 16:22:18,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:22:18,324 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 8 treesize of output 1 [2025-01-09 16:22:18,353 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 8 treesize of output 1 [2025-01-09 16:22:18,391 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 8 treesize of output 1 [2025-01-09 16:22:18,423 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 8 treesize of output 1 [2025-01-09 16:22:18,474 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 8 treesize of output 1 [2025-01-09 16:22:18,647 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:22:18,647 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:22:18,697 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-01-09 16:22:18,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833173333] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:22:18,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:22:18,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 6] total 22 [2025-01-09 16:22:18,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613610733] [2025-01-09 16:22:18,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:22:18,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-01-09 16:22:18,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:22:18,699 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-01-09 16:22:18,699 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2025-01-09 16:22:18,700 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-01-09 16:22:18,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 846 transitions, 12085 flow. Second operand has 22 states, 22 states have (on average 12.318181818181818) internal successors, (271), 22 states have internal predecessors, (271), 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 16:22:18,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:22:18,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-01-09 16:22:18,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-09 16:22:34,901 INFO L124 PetriNetUnfolderBase]: 36107/70214 cut-off events. [2025-01-09 16:22:34,902 INFO L125 PetriNetUnfolderBase]: For 512110/512110 co-relation queries the response was YES. [2025-01-09 16:22:36,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229991 conditions, 70214 events. 36107/70214 cut-off events. For 512110/512110 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 582722 event pairs, 4376 based on Foata normal form. 501/70701 useless extension candidates. Maximal degree in co-relation 227838. Up to 11778 conditions per place. [2025-01-09 16:22:36,327 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 704 selfloop transitions, 1364 changer transitions 30/2103 dead transitions. [2025-01-09 16:22:36,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 2103 transitions, 28112 flow [2025-01-09 16:22:36,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2025-01-09 16:22:36,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2025-01-09 16:22:36,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 1142 transitions. [2025-01-09 16:22:36,330 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5167420814479639 [2025-01-09 16:22:36,330 INFO L175 Difference]: Start difference. First operand has 255 places, 846 transitions, 12085 flow. Second operand 65 states and 1142 transitions. [2025-01-09 16:22:36,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 2103 transitions, 28112 flow [2025-01-09 16:22:45,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 2103 transitions, 27785 flow, removed 160 selfloop flow, removed 1 redundant places. [2025-01-09 16:22:45,181 INFO L231 Difference]: Finished difference. Result has 330 places, 1517 transitions, 24288 flow [2025-01-09 16:22:45,183 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=11907, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=733, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=24288, PETRI_PLACES=330, PETRI_TRANSITIONS=1517} [2025-01-09 16:22:45,185 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 298 predicate places. [2025-01-09 16:22:45,185 INFO L471 AbstractCegarLoop]: Abstraction has has 330 places, 1517 transitions, 24288 flow [2025-01-09 16:22:45,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 12.318181818181818) internal successors, (271), 22 states have internal predecessors, (271), 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 16:22:45,186 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-09 16:22:45,187 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 16:22:45,195 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 16:22:45,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:22:45,388 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-01-09 16:22:45,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 16:22:45,392 INFO L85 PathProgramCache]: Analyzing trace with hash -535015680, now seen corresponding path program 3 times [2025-01-09 16:22:45,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 16:22:45,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671802005] [2025-01-09 16:22:45,392 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:22:45,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 16:22:45,425 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 56 statements into 4 equivalence classes. [2025-01-09 16:22:45,669 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 56 of 56 statements. [2025-01-09 16:22:45,669 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-01-09 16:22:45,669 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:22:47,229 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 16:22:47,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 16:22:47,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671802005] [2025-01-09 16:22:47,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671802005] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 16:22:47,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413509546] [2025-01-09 16:22:47,230 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 16:22:47,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 16:22:47,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 16:22:47,231 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 16:22:47,232 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 16:22:47,328 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 56 statements into 4 equivalence classes. [2025-01-09 16:22:47,517 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 56 of 56 statements. [2025-01-09 16:22:47,517 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-01-09 16:22:47,517 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 16:22:47,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-01-09 16:22:47,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 16:22:47,543 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 16:22:47,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 34 treesize of output 14 [2025-01-09 16:22:47,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 34 treesize of output 14 [2025-01-09 16:22:47,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 34 treesize of output 14 [2025-01-09 16:22:47,813 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 56 treesize of output 32 [2025-01-09 16:22:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:22:47,839 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 16:22:48,683 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 16:22:48,683 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 1 case distinctions, treesize of input 18 treesize of output 14 [2025-01-09 16:22:48,705 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2025-01-09 16:22:48,706 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 120 treesize of output 95 [2025-01-09 16:22:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 16:22:48,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413509546] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 16:22:48,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 16:22:48,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2025-01-09 16:22:48,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956254907] [2025-01-09 16:22:48,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 16:22:48,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-01-09 16:22:48,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 16:22:48,813 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-01-09 16:22:48,813 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2025-01-09 16:22:48,816 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-01-09 16:22:48,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 1517 transitions, 24288 flow. Second operand has 30 states, 30 states have (on average 11.3) internal successors, (339), 30 states have internal predecessors, (339), 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 16:22:48,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-09 16:22:48,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-01-09 16:22:48,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand