./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 67ced8cbf918778cce3ae5cae291c50696df3950945fdf68713903c29ac269e1 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:31:55,330 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:31:55,389 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:31:55,395 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:31:55,395 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:31:55,431 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:31:55,432 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:31:55,433 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:31:55,433 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:31:55,442 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:31:55,442 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:31:55,443 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:31:55,443 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:31:55,443 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:31:55,443 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:31:55,444 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:31:55,444 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:31:55,444 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:31:55,444 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:31:55,445 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:31:55,445 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:31:55,448 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:31:55,448 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:31:55,448 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:31:55,448 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:31:55,449 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:31:55,449 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:31:55,449 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:31:55,449 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:31:55,449 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:31:55,449 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:31:55,449 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:31:55,449 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:31:55,450 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:31:55,450 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:31:55,450 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:31:55,450 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:31:55,450 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:31:55,450 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:31:55,450 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:31:55,451 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:31:55,452 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:31:55,452 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67ced8cbf918778cce3ae5cae291c50696df3950945fdf68713903c29ac269e1 [2024-10-11 14:31:55,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:31:55,662 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:31:55,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:31:55,665 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:31:55,666 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:31:55,667 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2024-10-11 14:31:56,924 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:31:57,089 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:31:57,090 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2024-10-11 14:31:57,098 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/b9847bc50/990fed3976b84cf19a9fc77a6c162aa5/FLAG59bd045c8 [2024-10-11 14:31:57,113 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/b9847bc50/990fed3976b84cf19a9fc77a6c162aa5 [2024-10-11 14:31:57,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:31:57,116 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:31:57,119 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:31:57,119 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:31:57,123 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:31:57,124 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:31:57" (1/1) ... [2024-10-11 14:31:57,126 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ce1fe0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:57, skipping insertion in model container [2024-10-11 14:31:57,126 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:31:57" (1/1) ... [2024-10-11 14:31:57,147 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:31:57,290 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3071,3084] [2024-10-11 14:31:57,296 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:31:57,314 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:31:57,334 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3071,3084] [2024-10-11 14:31:57,340 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:31:57,379 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:31:57,379 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:57 WrapperNode [2024-10-11 14:31:57,379 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:31:57,380 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:31:57,380 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:31:57,381 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:31:57,386 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:57" (1/1) ... [2024-10-11 14:31:57,394 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:57" (1/1) ... [2024-10-11 14:31:57,417 INFO L138 Inliner]: procedures = 25, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 117 [2024-10-11 14:31:57,418 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:31:57,418 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:31:57,418 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:31:57,418 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:31:57,427 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:57" (1/1) ... [2024-10-11 14:31:57,428 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:57" (1/1) ... [2024-10-11 14:31:57,430 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:57" (1/1) ... [2024-10-11 14:31:57,442 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-11 14:31:57,449 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:57" (1/1) ... [2024-10-11 14:31:57,450 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:57" (1/1) ... [2024-10-11 14:31:57,455 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:57" (1/1) ... [2024-10-11 14:31:57,457 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:57" (1/1) ... [2024-10-11 14:31:57,458 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:57" (1/1) ... [2024-10-11 14:31:57,459 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:57" (1/1) ... [2024-10-11 14:31:57,465 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:31:57,466 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:31:57,466 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:31:57,466 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:31:57,466 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:57" (1/1) ... [2024-10-11 14:31:57,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:31:57,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:31:57,495 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:31:57,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:31:57,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:31:57,527 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 14:31:57,528 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 14:31:57,528 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 14:31:57,528 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 14:31:57,528 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-11 14:31:57,528 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-11 14:31:57,528 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-10-11 14:31:57,528 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-10-11 14:31:57,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:31:57,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 14:31:57,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 14:31:57,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 14:31:57,529 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-11 14:31:57,529 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-11 14:31:57,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 14:31:57,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:31:57,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:31:57,533 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 14:31:57,533 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 14:31:57,535 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:31:57,624 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:31:57,626 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:31:57,816 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:31:57,816 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:31:57,965 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:31:57,966 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-11 14:31:57,966 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:57 BoogieIcfgContainer [2024-10-11 14:31:57,966 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:31:57,968 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:31:57,968 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:31:57,971 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:31:57,971 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:31:57" (1/3) ... [2024-10-11 14:31:57,972 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a934d9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:31:57, skipping insertion in model container [2024-10-11 14:31:57,972 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:57" (2/3) ... [2024-10-11 14:31:57,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a934d9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:31:57, skipping insertion in model container [2024-10-11 14:31:57,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:57" (3/3) ... [2024-10-11 14:31:57,977 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-dec.wvr.c [2024-10-11 14:31:57,989 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:31:57,989 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:31:57,989 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:31:58,034 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-11 14:31:58,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 46 transitions, 120 flow [2024-10-11 14:31:58,102 INFO L124 PetriNetUnfolderBase]: 4/42 cut-off events. [2024-10-11 14:31:58,102 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-11 14:31:58,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 42 events. 4/42 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 89 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2024-10-11 14:31:58,110 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 46 transitions, 120 flow [2024-10-11 14:31:58,112 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 41 transitions, 106 flow [2024-10-11 14:31:58,118 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:31:58,124 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;@650574a6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:31:58,128 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-11 14:31:58,147 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:31:58,147 INFO L124 PetriNetUnfolderBase]: 4/40 cut-off events. [2024-10-11 14:31:58,148 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-11 14:31:58,148 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:58,148 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:58,149 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:31:58,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:58,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1137501502, now seen corresponding path program 1 times [2024-10-11 14:31:58,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:58,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802665501] [2024-10-11 14:31:58,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:58,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:58,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:58,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:31:58,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:58,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802665501] [2024-10-11 14:31:58,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802665501] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:58,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:58,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:31:58,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296520814] [2024-10-11 14:31:58,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:58,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:31:58,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:58,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:31:58,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:31:58,629 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-10-11 14:31:58,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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) [2024-10-11 14:31:58,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:58,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-10-11 14:31:58,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:59,152 INFO L124 PetriNetUnfolderBase]: 3361/4866 cut-off events. [2024-10-11 14:31:59,152 INFO L125 PetriNetUnfolderBase]: For 267/267 co-relation queries the response was YES. [2024-10-11 14:31:59,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9703 conditions, 4866 events. 3361/4866 cut-off events. For 267/267 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 28316 event pairs, 1583 based on Foata normal form. 162/4816 useless extension candidates. Maximal degree in co-relation 9085. Up to 2990 conditions per place. [2024-10-11 14:31:59,227 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 42 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2024-10-11 14:31:59,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 237 flow [2024-10-11 14:31:59,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 14:31:59,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 14:31:59,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-10-11 14:31:59,239 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2024-10-11 14:31:59,240 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 106 flow. Second operand 4 states and 110 transitions. [2024-10-11 14:31:59,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 237 flow [2024-10-11 14:31:59,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 215 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-11 14:31:59,256 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 104 flow [2024-10-11 14:31:59,257 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2024-10-11 14:31:59,261 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, -4 predicate places. [2024-10-11 14:31:59,261 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 104 flow [2024-10-11 14:31:59,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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) [2024-10-11 14:31:59,262 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:59,262 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:59,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:31:59,263 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:31:59,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:59,264 INFO L85 PathProgramCache]: Analyzing trace with hash -66851015, now seen corresponding path program 1 times [2024-10-11 14:31:59,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:59,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329297088] [2024-10-11 14:31:59,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:59,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:59,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:59,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:31:59,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:59,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329297088] [2024-10-11 14:31:59,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329297088] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:59,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:59,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:31:59,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815537466] [2024-10-11 14:31:59,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:59,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:31:59,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:59,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:31:59,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:31:59,401 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-10-11 14:31:59,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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) [2024-10-11 14:31:59,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:59,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-10-11 14:31:59,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:31:59,836 INFO L124 PetriNetUnfolderBase]: 4370/6365 cut-off events. [2024-10-11 14:31:59,837 INFO L125 PetriNetUnfolderBase]: For 1112/1112 co-relation queries the response was YES. [2024-10-11 14:31:59,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13521 conditions, 6365 events. 4370/6365 cut-off events. For 1112/1112 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 37204 event pairs, 2417 based on Foata normal form. 192/6379 useless extension candidates. Maximal degree in co-relation 2091. Up to 4205 conditions per place. [2024-10-11 14:31:59,867 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 47 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2024-10-11 14:31:59,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 61 transitions, 255 flow [2024-10-11 14:31:59,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 14:31:59,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 14:31:59,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-10-11 14:31:59,870 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.592391304347826 [2024-10-11 14:31:59,870 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 104 flow. Second operand 4 states and 109 transitions. [2024-10-11 14:31:59,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 61 transitions, 255 flow [2024-10-11 14:31:59,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 61 transitions, 249 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 14:31:59,875 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 114 flow [2024-10-11 14:31:59,875 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2024-10-11 14:31:59,875 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2024-10-11 14:31:59,876 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 114 flow [2024-10-11 14:31:59,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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) [2024-10-11 14:31:59,876 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:31:59,876 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:31:59,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 14:31:59,877 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:31:59,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:31:59,878 INFO L85 PathProgramCache]: Analyzing trace with hash 319106967, now seen corresponding path program 1 times [2024-10-11 14:31:59,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:31:59,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53092802] [2024-10-11 14:31:59,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:31:59,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:31:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:31:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:31:59,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:31:59,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53092802] [2024-10-11 14:31:59,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53092802] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:31:59,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:31:59,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:31:59,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473960487] [2024-10-11 14:31:59,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:31:59,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:31:59,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:31:59,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:31:59,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:31:59,996 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-10-11 14:31:59,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:31:59,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:31:59,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-10-11 14:31:59,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:00,393 INFO L124 PetriNetUnfolderBase]: 4947/7209 cut-off events. [2024-10-11 14:32:00,393 INFO L125 PetriNetUnfolderBase]: For 1480/1745 co-relation queries the response was YES. [2024-10-11 14:32:00,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16318 conditions, 7209 events. 4947/7209 cut-off events. For 1480/1745 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 42544 event pairs, 2918 based on Foata normal form. 505/7589 useless extension candidates. Maximal degree in co-relation 4322. Up to 4773 conditions per place. [2024-10-11 14:32:00,423 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 48 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2024-10-11 14:32:00,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 62 transitions, 272 flow [2024-10-11 14:32:00,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 14:32:00,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 14:32:00,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2024-10-11 14:32:00,427 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-10-11 14:32:00,427 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 114 flow. Second operand 4 states and 108 transitions. [2024-10-11 14:32:00,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 62 transitions, 272 flow [2024-10-11 14:32:00,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 62 transitions, 267 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 14:32:00,429 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 124 flow [2024-10-11 14:32:00,430 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-10-11 14:32:00,430 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2024-10-11 14:32:00,430 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 124 flow [2024-10-11 14:32:00,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:00,431 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:00,431 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:00,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 14:32:00,431 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:32:00,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:00,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1683890689, now seen corresponding path program 1 times [2024-10-11 14:32:00,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:00,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824989568] [2024-10-11 14:32:00,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:00,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:00,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:32:00,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:00,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824989568] [2024-10-11 14:32:00,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824989568] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:32:00,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:32:00,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:32:00,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819200164] [2024-10-11 14:32:00,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:32:00,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:32:00,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:00,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:32:00,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:32:00,494 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-10-11 14:32:00,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2024-10-11 14:32:00,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:00,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-10-11 14:32:00,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:00,862 INFO L124 PetriNetUnfolderBase]: 4245/6149 cut-off events. [2024-10-11 14:32:00,863 INFO L125 PetriNetUnfolderBase]: For 1656/2112 co-relation queries the response was YES. [2024-10-11 14:32:00,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14705 conditions, 6149 events. 4245/6149 cut-off events. For 1656/2112 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 35908 event pairs, 3544 based on Foata normal form. 456/6493 useless extension candidates. Maximal degree in co-relation 4137. Up to 5716 conditions per place. [2024-10-11 14:32:00,894 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 31 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2024-10-11 14:32:00,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 45 transitions, 192 flow [2024-10-11 14:32:00,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:32:00,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:32:00,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-10-11 14:32:00,897 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.572463768115942 [2024-10-11 14:32:00,897 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 124 flow. Second operand 3 states and 79 transitions. [2024-10-11 14:32:00,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 45 transitions, 192 flow [2024-10-11 14:32:00,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 45 transitions, 188 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 14:32:00,900 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 132 flow [2024-10-11 14:32:00,901 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-10-11 14:32:00,901 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2024-10-11 14:32:00,902 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 132 flow [2024-10-11 14:32:00,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2024-10-11 14:32:00,903 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:00,903 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:00,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 14:32:00,903 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:32:00,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:00,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1659799412, now seen corresponding path program 1 times [2024-10-11 14:32:00,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:00,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699174633] [2024-10-11 14:32:00,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:00,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:32:01,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:01,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699174633] [2024-10-11 14:32:01,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699174633] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:32:01,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005607571] [2024-10-11 14:32:01,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:01,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:01,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:32:01,353 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:32:01,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:32:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:01,462 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 14:32:01,469 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:32:01,523 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 [2024-10-11 14:32:01,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-11 14:32:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:32:01,792 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:32:02,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:32:02,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005607571] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:32:02,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:32:02,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 8] total 22 [2024-10-11 14:32:02,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663129443] [2024-10-11 14:32:02,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:32:02,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-11 14:32:02,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:02,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-11 14:32:02,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2024-10-11 14:32:02,222 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-10-11 14:32:02,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 132 flow. Second operand has 22 states, 22 states have (on average 17.181818181818183) internal successors, (378), 22 states have internal predecessors, (378), 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) [2024-10-11 14:32:02,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:02,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-10-11 14:32:02,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:12,953 INFO L124 PetriNetUnfolderBase]: 93321/133930 cut-off events. [2024-10-11 14:32:12,953 INFO L125 PetriNetUnfolderBase]: For 43324/43324 co-relation queries the response was YES. [2024-10-11 14:32:13,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317895 conditions, 133930 events. 93321/133930 cut-off events. For 43324/43324 co-relation queries the response was YES. Maximal size of possible extension queue 5030. Compared 1032485 event pairs, 2188 based on Foata normal form. 21/133945 useless extension candidates. Maximal degree in co-relation 317881. Up to 19187 conditions per place. [2024-10-11 14:32:13,768 INFO L140 encePairwiseOnDemand]: 32/46 looper letters, 614 selfloop transitions, 118 changer transitions 735/1476 dead transitions. [2024-10-11 14:32:13,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 1476 transitions, 7447 flow [2024-10-11 14:32:13,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-10-11 14:32:13,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2024-10-11 14:32:13,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 2514 transitions. [2024-10-11 14:32:13,776 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6210474308300395 [2024-10-11 14:32:13,777 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 132 flow. Second operand 88 states and 2514 transitions. [2024-10-11 14:32:13,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 1476 transitions, 7447 flow [2024-10-11 14:32:14,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 1476 transitions, 7443 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 14:32:14,421 INFO L231 Difference]: Finished difference. Result has 210 places, 186 transitions, 1186 flow [2024-10-11 14:32:14,421 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=1186, PETRI_PLACES=210, PETRI_TRANSITIONS=186} [2024-10-11 14:32:14,422 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 160 predicate places. [2024-10-11 14:32:14,422 INFO L471 AbstractCegarLoop]: Abstraction has has 210 places, 186 transitions, 1186 flow [2024-10-11 14:32:14,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 17.181818181818183) internal successors, (378), 22 states have internal predecessors, (378), 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) [2024-10-11 14:32:14,422 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:32:14,423 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:32:14,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 14:32:14,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:32:14,623 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:32:14,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:32:14,624 INFO L85 PathProgramCache]: Analyzing trace with hash 831420880, now seen corresponding path program 2 times [2024-10-11 14:32:14,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:32:14,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22662832] [2024-10-11 14:32:14,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:32:14,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:32:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:32:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:32:14,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:32:14,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22662832] [2024-10-11 14:32:14,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22662832] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:32:14,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:32:14,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:32:14,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686927611] [2024-10-11 14:32:14,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:32:14,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:32:14,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:32:14,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:32:14,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:32:14,840 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-10-11 14:32:14,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 186 transitions, 1186 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:32:14,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:32:14,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-10-11 14:32:14,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:32:31,357 INFO L124 PetriNetUnfolderBase]: 73036/109441 cut-off events. [2024-10-11 14:32:31,357 INFO L125 PetriNetUnfolderBase]: For 3106923/3108807 co-relation queries the response was YES. [2024-10-11 14:32:32,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557062 conditions, 109441 events. 73036/109441 cut-off events. For 3106923/3108807 co-relation queries the response was YES. Maximal size of possible extension queue 3948. Compared 892377 event pairs, 12909 based on Foata normal form. 1443/110626 useless extension candidates. Maximal degree in co-relation 556968. Up to 51864 conditions per place. [2024-10-11 14:32:32,861 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 160 selfloop transitions, 4 changer transitions 309/496 dead transitions. [2024-10-11 14:32:32,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 496 transitions, 3880 flow [2024-10-11 14:32:32,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:32:32,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:32:32,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-10-11 14:32:32,863 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6391304347826087 [2024-10-11 14:32:32,863 INFO L175 Difference]: Start difference. First operand has 210 places, 186 transitions, 1186 flow. Second operand 5 states and 147 transitions. [2024-10-11 14:32:32,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 496 transitions, 3880 flow [2024-10-11 14:33:16,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 496 transitions, 3694 flow, removed 57 selfloop flow, removed 37 redundant places. [2024-10-11 14:33:16,632 INFO L231 Difference]: Finished difference. Result has 137 places, 124 transitions, 757 flow [2024-10-11 14:33:16,632 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1067, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=757, PETRI_PLACES=137, PETRI_TRANSITIONS=124} [2024-10-11 14:33:16,633 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 87 predicate places. [2024-10-11 14:33:16,633 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 124 transitions, 757 flow [2024-10-11 14:33:16,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:33:16,633 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:33:16,634 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:33:16,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 14:33:16,634 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-11 14:33:16,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:33:16,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1023005632, now seen corresponding path program 3 times [2024-10-11 14:33:16,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:33:16,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838000413] [2024-10-11 14:33:16,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:33:16,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:33:16,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:33:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:33:16,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:33:16,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838000413] [2024-10-11 14:33:16,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838000413] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:33:16,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609925306] [2024-10-11 14:33:16,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:33:16,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:33:16,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:33:16,836 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:33:16,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 14:33:16,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 14:33:16,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:33:16,920 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-11 14:33:16,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:33:16,965 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 17 treesize of output 9 [2024-10-11 14:33:17,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-11 14:33:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:33:17,060 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:33:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:33:17,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609925306] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:33:17,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:33:17,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 9] total 19 [2024-10-11 14:33:17,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514960922] [2024-10-11 14:33:17,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:33:17,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:33:17,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:33:17,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:33:17,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2024-10-11 14:33:17,326 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 46 [2024-10-11 14:33:17,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 124 transitions, 757 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 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) [2024-10-11 14:33:17,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:33:17,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 46 [2024-10-11 14:33:17,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand