./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-more-mts.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cc67bee348fb2ffff05c0616660a93fb872177c05d08813d910a29641aea282e --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 07:13:50,940 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 07:13:51,035 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 07:13:51,039 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 07:13:51,040 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 07:13:51,068 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 07:13:51,069 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 07:13:51,069 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 07:13:51,070 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 07:13:51,070 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 07:13:51,071 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 07:13:51,071 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 07:13:51,072 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 07:13:51,076 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 07:13:51,077 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 07:13:51,077 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 07:13:51,077 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 07:13:51,078 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 07:13:51,078 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 07:13:51,078 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 07:13:51,078 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 07:13:51,079 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 07:13:51,079 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 07:13:51,079 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 07:13:51,080 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 07:13:51,080 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 07:13:51,080 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 07:13:51,080 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 07:13:51,080 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 07:13:51,081 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 07:13:51,081 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 07:13:51,081 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 07:13:51,081 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:13:51,082 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 07:13:51,082 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 07:13:51,085 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 07:13:51,086 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 07:13:51,086 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 07:13:51,086 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 07:13:51,086 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 07:13:51,086 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 07:13:51,087 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 07:13:51,087 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc67bee348fb2ffff05c0616660a93fb872177c05d08813d910a29641aea282e [2024-10-13 07:13:51,330 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 07:13:51,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 07:13:51,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 07:13:51,358 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 07:13:51,359 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 07:13:51,361 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2024-10-13 07:13:52,798 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 07:13:52,964 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 07:13:52,965 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2024-10-13 07:13:52,973 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d409b262/a7d66563ce5e4751864c9fc1ac6ac491/FLAG33740e8b6 [2024-10-13 07:13:52,987 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d409b262/a7d66563ce5e4751864c9fc1ac6ac491 [2024-10-13 07:13:52,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 07:13:52,990 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 07:13:52,991 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 07:13:52,991 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 07:13:52,996 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 07:13:52,997 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:13:52" (1/1) ... [2024-10-13 07:13:52,998 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6919e3ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:52, skipping insertion in model container [2024-10-13 07:13:52,998 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:13:52" (1/1) ... [2024-10-13 07:13:53,040 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 07:13:53,260 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-more-mts.wvr.c[2572,2585] [2024-10-13 07:13:53,271 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:13:53,279 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 07:13:53,298 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-more-mts.wvr.c[2572,2585] [2024-10-13 07:13:53,302 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:13:53,315 INFO L204 MainTranslator]: Completed translation [2024-10-13 07:13:53,316 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:53 WrapperNode [2024-10-13 07:13:53,316 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 07:13:53,317 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 07:13:53,317 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 07:13:53,318 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 07:13:53,324 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:53" (1/1) ... [2024-10-13 07:13:53,332 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:53" (1/1) ... [2024-10-13 07:13:53,358 INFO L138 Inliner]: procedures = 24, calls = 31, calls flagged for inlining = 13, calls inlined = 19, statements flattened = 216 [2024-10-13 07:13:53,358 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 07:13:53,359 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 07:13:53,359 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 07:13:53,359 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 07:13:53,376 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:53" (1/1) ... [2024-10-13 07:13:53,377 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:53" (1/1) ... [2024-10-13 07:13:53,380 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:53" (1/1) ... [2024-10-13 07:13:53,407 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-13 07:13:53,407 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:53" (1/1) ... [2024-10-13 07:13:53,407 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:53" (1/1) ... [2024-10-13 07:13:53,420 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:53" (1/1) ... [2024-10-13 07:13:53,424 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:53" (1/1) ... [2024-10-13 07:13:53,427 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:53" (1/1) ... [2024-10-13 07:13:53,428 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:53" (1/1) ... [2024-10-13 07:13:53,431 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 07:13:53,432 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 07:13:53,432 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 07:13:53,432 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 07:13:53,433 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:53" (1/1) ... [2024-10-13 07:13:53,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:13:53,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:13:53,459 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 07:13:53,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 07:13:53,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 07:13:53,501 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-13 07:13:53,501 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-13 07:13:53,502 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-13 07:13:53,502 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-13 07:13:53,502 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-13 07:13:53,502 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-13 07:13:53,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 07:13:53,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 07:13:53,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 07:13:53,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 07:13:53,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-13 07:13:53,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-13 07:13:53,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 07:13:53,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 07:13:53,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 07:13:53,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 07:13:53,506 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 07:13:53,507 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 07:13:53,605 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 07:13:53,607 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 07:13:53,990 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 07:13:53,992 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 07:13:54,343 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 07:13:54,344 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-13 07:13:54,345 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:13:54 BoogieIcfgContainer [2024-10-13 07:13:54,346 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 07:13:54,348 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 07:13:54,349 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 07:13:54,354 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 07:13:54,355 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:13:52" (1/3) ... [2024-10-13 07:13:54,355 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211dd4db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:13:54, skipping insertion in model container [2024-10-13 07:13:54,356 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:53" (2/3) ... [2024-10-13 07:13:54,356 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211dd4db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:13:54, skipping insertion in model container [2024-10-13 07:13:54,356 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:13:54" (3/3) ... [2024-10-13 07:13:54,358 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-mts.wvr.c [2024-10-13 07:13:54,379 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 07:13:54,379 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 07:13:54,379 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 07:13:54,438 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-13 07:13:54,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 29 transitions, 79 flow [2024-10-13 07:13:54,514 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2024-10-13 07:13:54,515 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-13 07:13:54,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 26 events. 4/26 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-10-13 07:13:54,519 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 29 transitions, 79 flow [2024-10-13 07:13:54,522 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 25 transitions, 68 flow [2024-10-13 07:13:54,535 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 07:13:54,547 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;@318d3bbc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 07:13:54,547 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-13 07:13:54,558 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 07:13:54,558 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-10-13 07:13:54,558 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-13 07:13:54,558 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:13:54,559 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:13:54,560 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 1 more)] === [2024-10-13 07:13:54,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:13:54,566 INFO L85 PathProgramCache]: Analyzing trace with hash 810057854, now seen corresponding path program 1 times [2024-10-13 07:13:54,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:13:54,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478526035] [2024-10-13 07:13:54,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:13:54,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:13:54,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:13:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:13:55,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:13:55,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478526035] [2024-10-13 07:13:55,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478526035] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:13:55,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:13:55,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 07:13:55,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837075212] [2024-10-13 07:13:55,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:13:55,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 07:13:55,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:13:55,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 07:13:55,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 07:13:55,423 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-10-13 07:13:55,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2024-10-13 07:13:55,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:13:55,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-10-13 07:13:55,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:13:55,612 INFO L124 PetriNetUnfolderBase]: 439/661 cut-off events. [2024-10-13 07:13:55,612 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-10-13 07:13:55,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1382 conditions, 661 events. 439/661 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2306 event pairs, 124 based on Foata normal form. 1/542 useless extension candidates. Maximal degree in co-relation 1176. Up to 423 conditions per place. [2024-10-13 07:13:55,625 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 35 selfloop transitions, 4 changer transitions 1/42 dead transitions. [2024-10-13 07:13:55,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 42 transitions, 197 flow [2024-10-13 07:13:55,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 07:13:55,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 07:13:55,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2024-10-13 07:13:55,636 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6436781609195402 [2024-10-13 07:13:55,655 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 68 flow. Second operand 3 states and 56 transitions. [2024-10-13 07:13:55,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 42 transitions, 197 flow [2024-10-13 07:13:55,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 42 transitions, 175 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-13 07:13:55,663 INFO L231 Difference]: Finished difference. Result has 28 places, 28 transitions, 82 flow [2024-10-13 07:13:55,665 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=28, PETRI_TRANSITIONS=28} [2024-10-13 07:13:55,668 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2024-10-13 07:13:55,668 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 28 transitions, 82 flow [2024-10-13 07:13:55,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2024-10-13 07:13:55,669 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:13:55,669 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] [2024-10-13 07:13:55,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 07:13:55,669 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 1 more)] === [2024-10-13 07:13:55,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:13:55,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1894890144, now seen corresponding path program 1 times [2024-10-13 07:13:55,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:13:55,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669843326] [2024-10-13 07:13:55,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:13:55,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:13:55,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:13:55,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:13:55,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:13:55,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669843326] [2024-10-13 07:13:55,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669843326] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:13:55,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:13:55,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 07:13:55,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018576768] [2024-10-13 07:13:55,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:13:55,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 07:13:55,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:13:55,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 07:13:55,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 07:13:55,779 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-10-13 07:13:55,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 28 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2024-10-13 07:13:55,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:13:55,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-10-13 07:13:55,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:13:55,910 INFO L124 PetriNetUnfolderBase]: 439/678 cut-off events. [2024-10-13 07:13:55,910 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-10-13 07:13:55,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1586 conditions, 678 events. 439/678 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2372 event pairs, 287 based on Foata normal form. 0/677 useless extension candidates. Maximal degree in co-relation 484. Up to 641 conditions per place. [2024-10-13 07:13:55,919 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 25 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2024-10-13 07:13:55,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 29 transitions, 138 flow [2024-10-13 07:13:55,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 07:13:55,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 07:13:55,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 40 transitions. [2024-10-13 07:13:55,921 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45977011494252873 [2024-10-13 07:13:55,921 INFO L175 Difference]: Start difference. First operand has 28 places, 28 transitions, 82 flow. Second operand 3 states and 40 transitions. [2024-10-13 07:13:55,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 29 transitions, 138 flow [2024-10-13 07:13:55,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 29 transitions, 134 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 07:13:55,922 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 90 flow [2024-10-13 07:13:55,923 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2024-10-13 07:13:55,925 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2024-10-13 07:13:55,925 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 90 flow [2024-10-13 07:13:55,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2024-10-13 07:13:55,925 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:13:55,926 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] [2024-10-13 07:13:55,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 07:13:55,926 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 1 more)] === [2024-10-13 07:13:55,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:13:55,929 INFO L85 PathProgramCache]: Analyzing trace with hash -390222636, now seen corresponding path program 1 times [2024-10-13 07:13:55,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:13:55,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007729210] [2024-10-13 07:13:55,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:13:55,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:13:55,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:13:56,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:13:56,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:13:56,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007729210] [2024-10-13 07:13:56,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007729210] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:13:56,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:13:56,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 07:13:56,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367061261] [2024-10-13 07:13:56,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:13:56,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:13:56,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:13:56,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:13:56,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:13:56,033 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-10-13 07:13:56,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:13:56,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:13:56,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-10-13 07:13:56,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:13:56,215 INFO L124 PetriNetUnfolderBase]: 538/782 cut-off events. [2024-10-13 07:13:56,215 INFO L125 PetriNetUnfolderBase]: For 149/149 co-relation queries the response was YES. [2024-10-13 07:13:56,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1787 conditions, 782 events. 538/782 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2437 event pairs, 170 based on Foata normal form. 0/759 useless extension candidates. Maximal degree in co-relation 1774. Up to 405 conditions per place. [2024-10-13 07:13:56,224 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 36 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-10-13 07:13:56,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 41 transitions, 204 flow [2024-10-13 07:13:56,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:13:56,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:13:56,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 51 transitions. [2024-10-13 07:13:56,225 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4396551724137931 [2024-10-13 07:13:56,225 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 90 flow. Second operand 4 states and 51 transitions. [2024-10-13 07:13:56,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 41 transitions, 204 flow [2024-10-13 07:13:56,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 41 transitions, 198 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-10-13 07:13:56,228 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 105 flow [2024-10-13 07:13:56,228 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2024-10-13 07:13:56,230 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2024-10-13 07:13:56,231 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 105 flow [2024-10-13 07:13:56,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:13:56,231 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:13:56,231 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] [2024-10-13 07:13:56,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 07:13:56,232 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 1 more)] === [2024-10-13 07:13:56,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:13:56,233 INFO L85 PathProgramCache]: Analyzing trace with hash 13087628, now seen corresponding path program 1 times [2024-10-13 07:13:56,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:13:56,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77050327] [2024-10-13 07:13:56,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:13:56,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:13:56,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:13:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:13:56,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:13:56,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77050327] [2024-10-13 07:13:56,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77050327] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:13:56,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526684676] [2024-10-13 07:13:56,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:13:56,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:13:56,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:13:56,399 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:13:56,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 07:13:56,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:13:56,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 07:13:56,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:13:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:13:56,589 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:13:56,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:13:56,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526684676] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-13 07:13:56,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-13 07:13:56,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-10-13 07:13:56,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548361376] [2024-10-13 07:13:56,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:13:56,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 07:13:56,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:13:56,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 07:13:56,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-13 07:13:56,648 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-10-13 07:13:56,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 105 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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) [2024-10-13 07:13:56,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:13:56,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-10-13 07:13:56,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:13:56,843 INFO L124 PetriNetUnfolderBase]: 441/667 cut-off events. [2024-10-13 07:13:56,845 INFO L125 PetriNetUnfolderBase]: For 285/285 co-relation queries the response was YES. [2024-10-13 07:13:56,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1733 conditions, 667 events. 441/667 cut-off events. For 285/285 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2221 event pairs, 196 based on Foata normal form. 50/717 useless extension candidates. Maximal degree in co-relation 1713. Up to 462 conditions per place. [2024-10-13 07:13:56,851 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 37 selfloop transitions, 5 changer transitions 0/45 dead transitions. [2024-10-13 07:13:56,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 45 transitions, 241 flow [2024-10-13 07:13:56,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:13:56,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:13:56,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2024-10-13 07:13:56,853 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43448275862068964 [2024-10-13 07:13:56,853 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 105 flow. Second operand 5 states and 63 transitions. [2024-10-13 07:13:56,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 45 transitions, 241 flow [2024-10-13 07:13:56,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 45 transitions, 235 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 07:13:56,858 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 122 flow [2024-10-13 07:13:56,859 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2024-10-13 07:13:56,860 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2024-10-13 07:13:56,860 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 122 flow [2024-10-13 07:13:56,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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) [2024-10-13 07:13:56,861 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:13:56,861 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] [2024-10-13 07:13:56,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 07:13:57,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:13:57,063 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 1 more)] === [2024-10-13 07:13:57,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:13:57,063 INFO L85 PathProgramCache]: Analyzing trace with hash -479888153, now seen corresponding path program 1 times [2024-10-13 07:13:57,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:13:57,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183067292] [2024-10-13 07:13:57,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:13:57,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:13:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:13:58,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:13:58,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:13:58,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183067292] [2024-10-13 07:13:58,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183067292] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:13:58,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837141950] [2024-10-13 07:13:58,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:13:58,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:13:58,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:13:58,292 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:13:58,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 07:13:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:13:58,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-13 07:13:58,416 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:13:58,478 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 [2024-10-13 07:13:58,965 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 66 treesize of output 38 [2024-10-13 07:13:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:13:59,044 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:14:00,089 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 69 treesize of output 61 [2024-10-13 07:14:00,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 92 treesize of output 84 [2024-10-13 07:14:00,155 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 96 treesize of output 86 [2024-10-13 07:14:00,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 125 treesize of output 115 [2024-10-13 07:14:00,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:00,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837141950] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:14:00,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:14:00,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 26 [2024-10-13 07:14:00,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249835737] [2024-10-13 07:14:00,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:14:00,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-13 07:14:00,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:14:00,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-13 07:14:00,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2024-10-13 07:14:00,351 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-10-13 07:14:00,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 122 flow. Second operand has 27 states, 27 states have (on average 7.444444444444445) internal successors, (201), 27 states have internal predecessors, (201), 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) [2024-10-13 07:14:00,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:14:00,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-10-13 07:14:00,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:14:01,677 INFO L124 PetriNetUnfolderBase]: 1051/1619 cut-off events. [2024-10-13 07:14:01,677 INFO L125 PetriNetUnfolderBase]: For 1081/1087 co-relation queries the response was YES. [2024-10-13 07:14:01,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4554 conditions, 1619 events. 1051/1619 cut-off events. For 1081/1087 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6960 event pairs, 26 based on Foata normal form. 8/1627 useless extension candidates. Maximal degree in co-relation 3255. Up to 809 conditions per place. [2024-10-13 07:14:01,690 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 117 selfloop transitions, 53 changer transitions 2/175 dead transitions. [2024-10-13 07:14:01,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 175 transitions, 949 flow [2024-10-13 07:14:01,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-13 07:14:01,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-13 07:14:01,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 268 transitions. [2024-10-13 07:14:01,694 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4863883847549909 [2024-10-13 07:14:01,694 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 122 flow. Second operand 19 states and 268 transitions. [2024-10-13 07:14:01,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 175 transitions, 949 flow [2024-10-13 07:14:01,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 175 transitions, 933 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-10-13 07:14:01,700 INFO L231 Difference]: Finished difference. Result has 62 places, 78 transitions, 500 flow [2024-10-13 07:14:01,700 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=500, PETRI_PLACES=62, PETRI_TRANSITIONS=78} [2024-10-13 07:14:01,701 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 31 predicate places. [2024-10-13 07:14:01,701 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 78 transitions, 500 flow [2024-10-13 07:14:01,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 7.444444444444445) internal successors, (201), 27 states have internal predecessors, (201), 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) [2024-10-13 07:14:01,702 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:14:01,702 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] [2024-10-13 07:14:01,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-13 07:14:01,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:14:01,907 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 1 more)] === [2024-10-13 07:14:01,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:14:01,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1128554049, now seen corresponding path program 2 times [2024-10-13 07:14:01,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:14:01,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281499948] [2024-10-13 07:14:01,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:14:01,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:14:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:14:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:02,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:14:02,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281499948] [2024-10-13 07:14:02,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281499948] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:14:02,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128533282] [2024-10-13 07:14:02,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:14:02,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:14:02,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:14:02,740 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:14:02,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 07:14:02,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:14:02,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:14:02,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-13 07:14:02,841 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:14:02,892 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 [2024-10-13 07:14:03,275 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 66 treesize of output 38 [2024-10-13 07:14:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:03,364 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:14:04,648 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 213 treesize of output 195 [2024-10-13 07:14:04,716 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:14:04,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 287 treesize of output 317 [2024-10-13 07:14:25,072 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 98 treesize of output 90 [2024-10-13 07:14:25,084 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-10-13 07:14:25,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 [2024-10-13 07:14:25,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:25,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128533282] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:14:25,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:14:25,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2024-10-13 07:14:25,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546306151] [2024-10-13 07:14:25,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:14:25,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-13 07:14:25,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:14:25,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-13 07:14:25,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2024-10-13 07:14:25,150 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-10-13 07:14:25,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 78 transitions, 500 flow. Second operand has 24 states, 24 states have (on average 6.875) internal successors, (165), 24 states have internal predecessors, (165), 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) [2024-10-13 07:14:25,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:14:25,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-10-13 07:14:25,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:14:26,230 INFO L124 PetriNetUnfolderBase]: 1687/2434 cut-off events. [2024-10-13 07:14:26,231 INFO L125 PetriNetUnfolderBase]: For 5353/5353 co-relation queries the response was YES. [2024-10-13 07:14:26,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9392 conditions, 2434 events. 1687/2434 cut-off events. For 5353/5353 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9981 event pairs, 290 based on Foata normal form. 1/2435 useless extension candidates. Maximal degree in co-relation 9149. Up to 1895 conditions per place. [2024-10-13 07:14:26,252 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 107 selfloop transitions, 34 changer transitions 1/143 dead transitions. [2024-10-13 07:14:26,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 143 transitions, 1128 flow [2024-10-13 07:14:26,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 07:14:26,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-13 07:14:26,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 132 transitions. [2024-10-13 07:14:26,254 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45517241379310347 [2024-10-13 07:14:26,254 INFO L175 Difference]: Start difference. First operand has 62 places, 78 transitions, 500 flow. Second operand 10 states and 132 transitions. [2024-10-13 07:14:26,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 143 transitions, 1128 flow [2024-10-13 07:14:26,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 143 transitions, 1029 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-10-13 07:14:26,270 INFO L231 Difference]: Finished difference. Result has 74 places, 98 transitions, 669 flow [2024-10-13 07:14:26,270 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=669, PETRI_PLACES=74, PETRI_TRANSITIONS=98} [2024-10-13 07:14:26,273 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 43 predicate places. [2024-10-13 07:14:26,273 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 98 transitions, 669 flow [2024-10-13 07:14:26,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.875) internal successors, (165), 24 states have internal predecessors, (165), 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) [2024-10-13 07:14:26,273 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:14:26,273 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] [2024-10-13 07:14:26,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 07:14:26,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:14:26,474 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 1 more)] === [2024-10-13 07:14:26,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:14:26,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1065817201, now seen corresponding path program 3 times [2024-10-13 07:14:26,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:14:26,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879598368] [2024-10-13 07:14:26,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:14:26,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:14:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:14:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:27,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:14:27,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879598368] [2024-10-13 07:14:27,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879598368] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:14:27,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758105008] [2024-10-13 07:14:27,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:14:27,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:14:27,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:14:27,156 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:14:27,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 07:14:27,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 07:14:27,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:14:27,238 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-13 07:14:27,240 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:14:27,278 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 [2024-10-13 07:14:27,643 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:14:27,644 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 99 treesize of output 81 [2024-10-13 07:14:27,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:27,950 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:14:29,217 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 96 treesize of output 86 [2024-10-13 07:14:29,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 125 treesize of output 115 [2024-10-13 07:14:29,284 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 69 treesize of output 61 [2024-10-13 07:14:29,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 92 treesize of output 84 [2024-10-13 07:14:29,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:29,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758105008] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:14:29,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:14:29,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-10-13 07:14:29,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126962947] [2024-10-13 07:14:29,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:14:29,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-13 07:14:29,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:14:29,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-13 07:14:29,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2024-10-13 07:14:29,425 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-10-13 07:14:29,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 98 transitions, 669 flow. Second operand has 26 states, 26 states have (on average 6.653846153846154) internal successors, (173), 26 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:14:29,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:14:29,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-10-13 07:14:29,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:14:30,761 INFO L124 PetriNetUnfolderBase]: 2176/3131 cut-off events. [2024-10-13 07:14:30,761 INFO L125 PetriNetUnfolderBase]: For 7848/7848 co-relation queries the response was YES. [2024-10-13 07:14:30,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12614 conditions, 3131 events. 2176/3131 cut-off events. For 7848/7848 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13507 event pairs, 297 based on Foata normal form. 2/3133 useless extension candidates. Maximal degree in co-relation 12378. Up to 2324 conditions per place. [2024-10-13 07:14:30,791 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 162 selfloop transitions, 50 changer transitions 2/215 dead transitions. [2024-10-13 07:14:30,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 215 transitions, 1751 flow [2024-10-13 07:14:30,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-13 07:14:30,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-10-13 07:14:30,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 233 transitions. [2024-10-13 07:14:30,794 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.446360153256705 [2024-10-13 07:14:30,794 INFO L175 Difference]: Start difference. First operand has 74 places, 98 transitions, 669 flow. Second operand 18 states and 233 transitions. [2024-10-13 07:14:30,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 215 transitions, 1751 flow [2024-10-13 07:14:30,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 215 transitions, 1734 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-10-13 07:14:30,814 INFO L231 Difference]: Finished difference. Result has 94 places, 124 transitions, 999 flow [2024-10-13 07:14:30,814 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=999, PETRI_PLACES=94, PETRI_TRANSITIONS=124} [2024-10-13 07:14:30,815 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 63 predicate places. [2024-10-13 07:14:30,815 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 124 transitions, 999 flow [2024-10-13 07:14:30,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.653846153846154) internal successors, (173), 26 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:14:30,815 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:14:30,815 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] [2024-10-13 07:14:30,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-13 07:14:31,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:14:31,016 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-13 07:14:31,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:14:31,016 INFO L85 PathProgramCache]: Analyzing trace with hash -271198019, now seen corresponding path program 4 times [2024-10-13 07:14:31,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:14:31,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916434582] [2024-10-13 07:14:31,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:14:31,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:14:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:14:31,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:31,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:14:31,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916434582] [2024-10-13 07:14:31,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916434582] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:14:31,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565339562] [2024-10-13 07:14:31,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:14:31,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:14:31,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:14:31,789 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:14:31,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 07:14:31,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:14:31,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:14:31,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-13 07:14:31,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:14:31,904 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 [2024-10-13 07:14:32,123 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 66 treesize of output 38 [2024-10-13 07:14:32,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:32,163 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:14:33,043 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 241 treesize of output 219 [2024-10-13 07:14:33,092 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:14:33,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 359 treesize of output 373 [2024-10-13 07:14:51,808 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 98 treesize of output 90 [2024-10-13 07:14:51,817 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-10-13 07:14:51,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 [2024-10-13 07:14:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:51,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565339562] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:14:51,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:14:51,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2024-10-13 07:14:51,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409158803] [2024-10-13 07:14:51,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:14:51,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-13 07:14:51,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:14:51,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-13 07:14:51,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2024-10-13 07:14:51,887 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-10-13 07:14:51,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 124 transitions, 999 flow. Second operand has 24 states, 24 states have (on average 6.875) internal successors, (165), 24 states have internal predecessors, (165), 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) [2024-10-13 07:14:51,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:14:51,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-10-13 07:14:51,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:14:52,776 INFO L124 PetriNetUnfolderBase]: 2324/3344 cut-off events. [2024-10-13 07:14:52,777 INFO L125 PetriNetUnfolderBase]: For 11315/11315 co-relation queries the response was YES. [2024-10-13 07:14:52,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14724 conditions, 3344 events. 2324/3344 cut-off events. For 11315/11315 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14510 event pairs, 414 based on Foata normal form. 1/3345 useless extension candidates. Maximal degree in co-relation 14466. Up to 2785 conditions per place. [2024-10-13 07:14:52,814 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 139 selfloop transitions, 35 changer transitions 1/176 dead transitions. [2024-10-13 07:14:52,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 176 transitions, 1618 flow [2024-10-13 07:14:52,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 07:14:52,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-13 07:14:52,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2024-10-13 07:14:52,818 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4789272030651341 [2024-10-13 07:14:52,818 INFO L175 Difference]: Start difference. First operand has 94 places, 124 transitions, 999 flow. Second operand 9 states and 125 transitions. [2024-10-13 07:14:52,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 176 transitions, 1618 flow [2024-10-13 07:14:52,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 176 transitions, 1470 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-10-13 07:14:52,847 INFO L231 Difference]: Finished difference. Result has 97 places, 131 transitions, 1020 flow [2024-10-13 07:14:52,850 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=851, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1020, PETRI_PLACES=97, PETRI_TRANSITIONS=131} [2024-10-13 07:14:52,850 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 66 predicate places. [2024-10-13 07:14:52,850 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 131 transitions, 1020 flow [2024-10-13 07:14:52,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.875) internal successors, (165), 24 states have internal predecessors, (165), 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) [2024-10-13 07:14:52,851 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:14:52,851 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] [2024-10-13 07:14:52,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-13 07:14:53,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:14:53,052 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-13 07:14:53,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:14:53,052 INFO L85 PathProgramCache]: Analyzing trace with hash 651817233, now seen corresponding path program 5 times [2024-10-13 07:14:53,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:14:53,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691177771] [2024-10-13 07:14:53,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:14:53,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:14:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:14:53,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:53,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:14:53,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691177771] [2024-10-13 07:14:53,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691177771] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:14:53,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325887344] [2024-10-13 07:14:53,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:14:53,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:14:53,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:14:53,802 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:14:53,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 07:14:53,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-13 07:14:53,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:14:53,886 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-13 07:14:53,889 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:14:53,918 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 [2024-10-13 07:14:54,259 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:14:54,260 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 109 treesize of output 81 [2024-10-13 07:14:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:54,553 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:14:56,845 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 50 treesize of output 44 [2024-10-13 07:14:56,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 66 treesize of output 60 [2024-10-13 07:14:56,857 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 72 treesize of output 66 [2024-10-13 07:14:56,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 81 [2024-10-13 07:14:56,886 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 97 treesize of output 87 [2024-10-13 07:14:56,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 125 treesize of output 115 [2024-10-13 07:14:56,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-10-13 07:14:56,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 47 treesize of output 43 [2024-10-13 07:14:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:14:56,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325887344] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:14:56,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:14:56,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 26 [2024-10-13 07:14:56,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306985726] [2024-10-13 07:14:56,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:14:56,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-13 07:14:56,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:14:56,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-13 07:14:56,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2024-10-13 07:14:57,010 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-10-13 07:14:57,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 131 transitions, 1020 flow. Second operand has 27 states, 27 states have (on average 6.555555555555555) internal successors, (177), 27 states have internal predecessors, (177), 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) [2024-10-13 07:14:57,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:14:57,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-10-13 07:14:57,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:14:59,693 INFO L124 PetriNetUnfolderBase]: 3449/4915 cut-off events. [2024-10-13 07:14:59,693 INFO L125 PetriNetUnfolderBase]: For 17312/17312 co-relation queries the response was YES. [2024-10-13 07:14:59,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21534 conditions, 4915 events. 3449/4915 cut-off events. For 17312/17312 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22579 event pairs, 367 based on Foata normal form. 2/4917 useless extension candidates. Maximal degree in co-relation 21272. Up to 3384 conditions per place. [2024-10-13 07:14:59,745 INFO L140 encePairwiseOnDemand]: 16/29 looper letters, 234 selfloop transitions, 130 changer transitions 2/367 dead transitions. [2024-10-13 07:14:59,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 367 transitions, 3301 flow [2024-10-13 07:14:59,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-13 07:14:59,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-10-13 07:14:59,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 403 transitions. [2024-10-13 07:14:59,749 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40872210953346855 [2024-10-13 07:14:59,750 INFO L175 Difference]: Start difference. First operand has 97 places, 131 transitions, 1020 flow. Second operand 34 states and 403 transitions. [2024-10-13 07:14:59,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 367 transitions, 3301 flow [2024-10-13 07:14:59,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 367 transitions, 3237 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-10-13 07:14:59,793 INFO L231 Difference]: Finished difference. Result has 136 places, 225 transitions, 2130 flow [2024-10-13 07:14:59,794 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=959, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2130, PETRI_PLACES=136, PETRI_TRANSITIONS=225} [2024-10-13 07:14:59,794 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 105 predicate places. [2024-10-13 07:14:59,794 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 225 transitions, 2130 flow [2024-10-13 07:14:59,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.555555555555555) internal successors, (177), 27 states have internal predecessors, (177), 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) [2024-10-13 07:14:59,795 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:14:59,795 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] [2024-10-13 07:14:59,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-13 07:14:59,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:14:59,996 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-13 07:14:59,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:14:59,996 INFO L85 PathProgramCache]: Analyzing trace with hash 951043089, now seen corresponding path program 6 times [2024-10-13 07:14:59,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:14:59,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416790209] [2024-10-13 07:14:59,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:14:59,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:00,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:00,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416790209] [2024-10-13 07:15:00,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416790209] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:00,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324575128] [2024-10-13 07:15:00,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:15:00,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:00,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:00,725 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:00,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 07:15:00,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-13 07:15:00,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:15:00,829 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-13 07:15:00,832 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:00,882 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 [2024-10-13 07:15:01,206 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 66 treesize of output 38 [2024-10-13 07:15:01,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:01,269 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:02,470 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 118 treesize of output 108 [2024-10-13 07:15:02,485 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:15:02,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 145 treesize of output 143 [2024-10-13 07:15:03,103 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 43 treesize of output 39 [2024-10-13 07:15:03,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 55 treesize of output 43 [2024-10-13 07:15:03,148 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 116 treesize of output 106 [2024-10-13 07:15:03,177 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-10-13 07:15:03,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 167 treesize of output 153 [2024-10-13 07:15:03,460 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 54 treesize of output 48 [2024-10-13 07:15:03,468 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-13 07:15:03,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 1 [2024-10-13 07:15:03,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:15:03,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324575128] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:03,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:03,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2024-10-13 07:15:03,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379220895] [2024-10-13 07:15:03,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:03,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-13 07:15:03,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:03,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-13 07:15:03,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-10-13 07:15:03,603 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-10-13 07:15:03,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 225 transitions, 2130 flow. Second operand has 24 states, 24 states have (on average 6.875) internal successors, (165), 24 states have internal predecessors, (165), 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) [2024-10-13 07:15:03,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:03,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-10-13 07:15:03,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:04,667 INFO L124 PetriNetUnfolderBase]: 3606/5143 cut-off events. [2024-10-13 07:15:04,667 INFO L125 PetriNetUnfolderBase]: For 32948/32948 co-relation queries the response was YES. [2024-10-13 07:15:04,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26524 conditions, 5143 events. 3606/5143 cut-off events. For 32948/32948 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 23710 event pairs, 571 based on Foata normal form. 1/5144 useless extension candidates. Maximal degree in co-relation 26174. Up to 4634 conditions per place. [2024-10-13 07:15:04,726 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 224 selfloop transitions, 41 changer transitions 1/267 dead transitions. [2024-10-13 07:15:04,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 267 transitions, 2928 flow [2024-10-13 07:15:04,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 07:15:04,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-13 07:15:04,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-10-13 07:15:04,728 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4559386973180077 [2024-10-13 07:15:04,728 INFO L175 Difference]: Start difference. First operand has 136 places, 225 transitions, 2130 flow. Second operand 9 states and 119 transitions. [2024-10-13 07:15:04,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 267 transitions, 2928 flow [2024-10-13 07:15:04,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 267 transitions, 2387 flow, removed 238 selfloop flow, removed 11 redundant places. [2024-10-13 07:15:04,852 INFO L231 Difference]: Finished difference. Result has 135 places, 230 transitions, 1772 flow [2024-10-13 07:15:04,855 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1593, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1772, PETRI_PLACES=135, PETRI_TRANSITIONS=230} [2024-10-13 07:15:04,855 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 104 predicate places. [2024-10-13 07:15:04,855 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 230 transitions, 1772 flow [2024-10-13 07:15:04,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.875) internal successors, (165), 24 states have internal predecessors, (165), 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) [2024-10-13 07:15:04,856 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:04,856 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:04,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-13 07:15:05,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:05,057 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-13 07:15:05,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:05,057 INFO L85 PathProgramCache]: Analyzing trace with hash 2051286542, now seen corresponding path program 7 times [2024-10-13 07:15:05,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:05,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082353912] [2024-10-13 07:15:05,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:05,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:05,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:15:05,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:05,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082353912] [2024-10-13 07:15:05,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082353912] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:05,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193130790] [2024-10-13 07:15:05,163 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 07:15:05,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:05,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:05,165 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:05,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 07:15:05,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:05,263 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 07:15:05,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:05,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:15:05,333 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:05,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:15:05,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193130790] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:05,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:05,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-10-13 07:15:05,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503122801] [2024-10-13 07:15:05,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:05,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 07:15:05,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:05,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 07:15:05,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-10-13 07:15:05,418 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-10-13 07:15:05,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 230 transitions, 1772 flow. Second operand has 14 states, 14 states have (on average 8.285714285714286) internal successors, (116), 14 states have internal predecessors, (116), 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) [2024-10-13 07:15:05,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:05,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-10-13 07:15:05,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:06,239 INFO L124 PetriNetUnfolderBase]: 3198/4817 cut-off events. [2024-10-13 07:15:06,240 INFO L125 PetriNetUnfolderBase]: For 32749/32989 co-relation queries the response was YES. [2024-10-13 07:15:06,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24387 conditions, 4817 events. 3198/4817 cut-off events. For 32749/32989 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 24875 event pairs, 1324 based on Foata normal form. 136/4951 useless extension candidates. Maximal degree in co-relation 24223. Up to 3083 conditions per place. [2024-10-13 07:15:06,289 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 263 selfloop transitions, 26 changer transitions 0/294 dead transitions. [2024-10-13 07:15:06,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 294 transitions, 2848 flow [2024-10-13 07:15:06,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 07:15:06,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 07:15:06,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 113 transitions. [2024-10-13 07:15:06,290 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4870689655172414 [2024-10-13 07:15:06,291 INFO L175 Difference]: Start difference. First operand has 135 places, 230 transitions, 1772 flow. Second operand 8 states and 113 transitions. [2024-10-13 07:15:06,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 294 transitions, 2848 flow [2024-10-13 07:15:06,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 294 transitions, 2760 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-10-13 07:15:06,391 INFO L231 Difference]: Finished difference. Result has 138 places, 240 transitions, 1877 flow [2024-10-13 07:15:06,392 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1877, PETRI_PLACES=138, PETRI_TRANSITIONS=240} [2024-10-13 07:15:06,392 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 107 predicate places. [2024-10-13 07:15:06,393 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 240 transitions, 1877 flow [2024-10-13 07:15:06,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.285714285714286) internal successors, (116), 14 states have internal predecessors, (116), 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) [2024-10-13 07:15:06,393 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:06,393 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:06,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-13 07:15:06,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-13 07:15:06,598 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-13 07:15:06,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:06,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1338238594, now seen corresponding path program 8 times [2024-10-13 07:15:06,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:06,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433898745] [2024-10-13 07:15:06,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:06,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:06,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:06,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:15:06,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:06,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433898745] [2024-10-13 07:15:06,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433898745] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:06,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849675764] [2024-10-13 07:15:06,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:15:06,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:06,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:06,702 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:06,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-13 07:15:06,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:15:06,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:15:06,798 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 07:15:06,799 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:06,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:15:06,856 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:06,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:15:06,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849675764] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:06,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:06,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-10-13 07:15:06,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270269372] [2024-10-13 07:15:06,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:06,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 07:15:06,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:06,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 07:15:06,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-10-13 07:15:06,921 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-10-13 07:15:06,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 240 transitions, 1877 flow. Second operand has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:06,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:06,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-10-13 07:15:06,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:07,624 INFO L124 PetriNetUnfolderBase]: 2924/4501 cut-off events. [2024-10-13 07:15:07,624 INFO L125 PetriNetUnfolderBase]: For 33305/33552 co-relation queries the response was YES. [2024-10-13 07:15:07,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23099 conditions, 4501 events. 2924/4501 cut-off events. For 33305/33552 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 24151 event pairs, 949 based on Foata normal form. 246/4745 useless extension candidates. Maximal degree in co-relation 22697. Up to 1414 conditions per place. [2024-10-13 07:15:07,656 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 261 selfloop transitions, 46 changer transitions 0/312 dead transitions. [2024-10-13 07:15:07,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 312 transitions, 3040 flow [2024-10-13 07:15:07,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 07:15:07,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 07:15:07,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-10-13 07:15:07,657 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5221674876847291 [2024-10-13 07:15:07,657 INFO L175 Difference]: Start difference. First operand has 138 places, 240 transitions, 1877 flow. Second operand 7 states and 106 transitions. [2024-10-13 07:15:07,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 312 transitions, 3040 flow [2024-10-13 07:15:07,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 312 transitions, 3027 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-10-13 07:15:07,778 INFO L231 Difference]: Finished difference. Result has 141 places, 222 transitions, 1853 flow [2024-10-13 07:15:07,779 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1714, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1853, PETRI_PLACES=141, PETRI_TRANSITIONS=222} [2024-10-13 07:15:07,781 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 110 predicate places. [2024-10-13 07:15:07,781 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 222 transitions, 1853 flow [2024-10-13 07:15:07,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:07,781 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:07,781 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] [2024-10-13 07:15:07,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-13 07:15:07,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:07,983 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-13 07:15:07,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:07,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1784502229, now seen corresponding path program 1 times [2024-10-13 07:15:07,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:07,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626333280] [2024-10-13 07:15:07,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:07,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:15:08,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:08,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626333280] [2024-10-13 07:15:08,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626333280] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:08,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592887485] [2024-10-13 07:15:08,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:08,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:08,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:08,084 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:08,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-13 07:15:08,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:08,191 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 07:15:08,193 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:08,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:15:08,237 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:08,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:15:08,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592887485] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:08,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:08,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-10-13 07:15:08,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014426679] [2024-10-13 07:15:08,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:08,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 07:15:08,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:08,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 07:15:08,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-10-13 07:15:08,282 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-10-13 07:15:08,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 222 transitions, 1853 flow. Second operand has 13 states, 13 states have (on average 8.076923076923077) internal successors, (105), 13 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:08,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:08,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-10-13 07:15:08,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:08,780 INFO L124 PetriNetUnfolderBase]: 2459/3954 cut-off events. [2024-10-13 07:15:08,780 INFO L125 PetriNetUnfolderBase]: For 31018/31185 co-relation queries the response was YES. [2024-10-13 07:15:08,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20901 conditions, 3954 events. 2459/3954 cut-off events. For 31018/31185 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 22296 event pairs, 968 based on Foata normal form. 289/4243 useless extension candidates. Maximal degree in co-relation 20498. Up to 1438 conditions per place. [2024-10-13 07:15:08,808 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 252 selfloop transitions, 10 changer transitions 12/279 dead transitions. [2024-10-13 07:15:08,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 279 transitions, 2951 flow [2024-10-13 07:15:08,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 07:15:08,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 07:15:08,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 87 transitions. [2024-10-13 07:15:08,809 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-13 07:15:08,809 INFO L175 Difference]: Start difference. First operand has 141 places, 222 transitions, 1853 flow. Second operand 6 states and 87 transitions. [2024-10-13 07:15:08,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 279 transitions, 2951 flow [2024-10-13 07:15:08,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 279 transitions, 2789 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-10-13 07:15:08,893 INFO L231 Difference]: Finished difference. Result has 140 places, 169 transitions, 1442 flow [2024-10-13 07:15:08,893 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1418, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1442, PETRI_PLACES=140, PETRI_TRANSITIONS=169} [2024-10-13 07:15:08,894 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 109 predicate places. [2024-10-13 07:15:08,894 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 169 transitions, 1442 flow [2024-10-13 07:15:08,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.076923076923077) internal successors, (105), 13 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:08,894 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:08,894 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:08,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-13 07:15:09,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-13 07:15:09,095 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-13 07:15:09,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:09,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1681289207, now seen corresponding path program 9 times [2024-10-13 07:15:09,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:09,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629196683] [2024-10-13 07:15:09,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:09,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:09,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:15:09,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:09,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629196683] [2024-10-13 07:15:09,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629196683] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:09,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701979429] [2024-10-13 07:15:09,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:15:09,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:09,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:09,248 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:09,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-13 07:15:09,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-13 07:15:09,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:15:09,340 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 07:15:09,341 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:15:09,424 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:09,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:15:09,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701979429] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:09,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:09,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-10-13 07:15:09,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138057752] [2024-10-13 07:15:09,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:09,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 07:15:09,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:09,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 07:15:09,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-10-13 07:15:09,495 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-10-13 07:15:09,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 169 transitions, 1442 flow. Second operand has 18 states, 18 states have (on average 6.333333333333333) internal successors, (114), 18 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:09,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:09,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-10-13 07:15:09,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:15:10,540 INFO L124 PetriNetUnfolderBase]: 3672/5541 cut-off events. [2024-10-13 07:15:10,541 INFO L125 PetriNetUnfolderBase]: For 47227/47227 co-relation queries the response was YES. [2024-10-13 07:15:10,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30680 conditions, 5541 events. 3672/5541 cut-off events. For 47227/47227 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 29338 event pairs, 952 based on Foata normal form. 22/5563 useless extension candidates. Maximal degree in co-relation 30200. Up to 1482 conditions per place. [2024-10-13 07:15:10,575 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 364 selfloop transitions, 72 changer transitions 0/437 dead transitions. [2024-10-13 07:15:10,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 437 transitions, 4727 flow [2024-10-13 07:15:10,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-13 07:15:10,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-13 07:15:10,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 181 transitions. [2024-10-13 07:15:10,577 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4458128078817734 [2024-10-13 07:15:10,577 INFO L175 Difference]: Start difference. First operand has 140 places, 169 transitions, 1442 flow. Second operand 14 states and 181 transitions. [2024-10-13 07:15:10,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 437 transitions, 4727 flow [2024-10-13 07:15:10,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 437 transitions, 4679 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-10-13 07:15:10,671 INFO L231 Difference]: Finished difference. Result has 153 places, 207 transitions, 2039 flow [2024-10-13 07:15:10,671 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1420, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2039, PETRI_PLACES=153, PETRI_TRANSITIONS=207} [2024-10-13 07:15:10,671 INFO L277 CegarLoopForPetriNet]: 31 programPoint places, 122 predicate places. [2024-10-13 07:15:10,671 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 207 transitions, 2039 flow [2024-10-13 07:15:10,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.333333333333333) internal successors, (114), 18 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:10,672 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:15:10,672 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:15:10,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-13 07:15:10,872 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-13 07:15:10,873 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-13 07:15:10,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:15:10,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1554617895, now seen corresponding path program 10 times [2024-10-13 07:15:10,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:15:10,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111556553] [2024-10-13 07:15:10,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:15:10,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:15:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:15:11,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:15:11,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:15:11,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111556553] [2024-10-13 07:15:11,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111556553] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:15:11,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659182147] [2024-10-13 07:15:11,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:15:11,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:15:11,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:15:11,014 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:15:11,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-13 07:15:11,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:15:11,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:15:11,105 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 07:15:11,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:15:11,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:15:11,174 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:15:11,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:15:11,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659182147] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:15:11,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:15:11,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-10-13 07:15:11,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037064598] [2024-10-13 07:15:11,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:15:11,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 07:15:11,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:15:11,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 07:15:11,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-10-13 07:15:11,264 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-10-13 07:15:11,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 207 transitions, 2039 flow. Second operand has 19 states, 19 states have (on average 6.315789473684211) internal successors, (120), 19 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:15:11,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:15:11,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-10-13 07:15:11,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand