./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/chl-chromosome-symm.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/chl-chromosome-symm.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 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 07:06:26,925 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 07:06:26,988 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 07:06:26,995 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 07:06:26,996 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 07:06:27,022 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 07:06:27,023 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 07:06:27,023 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 07:06:27,024 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 07:06:27,027 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 07:06:27,027 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 07:06:27,027 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 07:06:27,028 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 07:06:27,028 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 07:06:27,028 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 07:06:27,028 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 07:06:27,028 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 07:06:27,029 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 07:06:27,029 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 07:06:27,029 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 07:06:27,029 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 07:06:27,031 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 07:06:27,031 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 07:06:27,031 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 07:06:27,031 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 07:06:27,032 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 07:06:27,032 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 07:06:27,032 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 07:06:27,032 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 07:06:27,034 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 07:06:27,034 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 07:06:27,034 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 07:06:27,034 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:06:27,034 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 07:06:27,035 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 07:06:27,035 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 07:06:27,035 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 07:06:27,035 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 07:06:27,036 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 07:06:27,036 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 07:06:27,036 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 07:06:27,037 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 07:06:27,037 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa [2024-10-13 07:06:27,258 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 07:06:27,278 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 07:06:27,280 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 07:06:27,281 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 07:06:27,282 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 07:06:27,282 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2024-10-13 07:06:28,635 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 07:06:28,806 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 07:06:28,808 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2024-10-13 07:06:28,818 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a7d5a0a9/5f94d308062448239b8aa5833b06de31/FLAGb041c24d0 [2024-10-13 07:06:29,204 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a7d5a0a9/5f94d308062448239b8aa5833b06de31 [2024-10-13 07:06:29,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 07:06:29,207 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 07:06:29,212 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 07:06:29,212 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 07:06:29,216 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 07:06:29,217 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:06:29" (1/1) ... [2024-10-13 07:06:29,217 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@659c7684 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:06:29, skipping insertion in model container [2024-10-13 07:06:29,218 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:06:29" (1/1) ... [2024-10-13 07:06:29,233 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 07:06:29,381 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/chl-chromosome-symm.wvr.c[2721,2734] [2024-10-13 07:06:29,409 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:06:29,417 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 07:06:29,440 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/chl-chromosome-symm.wvr.c[2721,2734] [2024-10-13 07:06:29,443 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:06:29,470 INFO L204 MainTranslator]: Completed translation [2024-10-13 07:06:29,471 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:06:29 WrapperNode [2024-10-13 07:06:29,471 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 07:06:29,472 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 07:06:29,472 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 07:06:29,472 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 07:06:29,477 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:06:29" (1/1) ... [2024-10-13 07:06:29,487 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:06:29" (1/1) ... [2024-10-13 07:06:29,509 INFO L138 Inliner]: procedures = 24, calls = 27, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 191 [2024-10-13 07:06:29,510 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 07:06:29,510 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 07:06:29,510 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 07:06:29,511 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 07:06:29,519 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:06:29" (1/1) ... [2024-10-13 07:06:29,519 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:06:29" (1/1) ... [2024-10-13 07:06:29,521 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:06:29" (1/1) ... [2024-10-13 07:06:29,533 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-13 07:06:29,533 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:06:29" (1/1) ... [2024-10-13 07:06:29,533 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:06:29" (1/1) ... [2024-10-13 07:06:29,538 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:06:29" (1/1) ... [2024-10-13 07:06:29,544 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:06:29" (1/1) ... [2024-10-13 07:06:29,545 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:06:29" (1/1) ... [2024-10-13 07:06:29,546 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:06:29" (1/1) ... [2024-10-13 07:06:29,550 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 07:06:29,551 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 07:06:29,551 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 07:06:29,551 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 07:06:29,551 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:06:29" (1/1) ... [2024-10-13 07:06:29,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:06:29,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:06:29,581 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 07:06:29,587 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 07:06:29,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 07:06:29,622 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-13 07:06:29,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-13 07:06:29,622 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-13 07:06:29,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-13 07:06:29,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 07:06:29,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 07:06:29,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 07:06:29,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 07:06:29,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 07:06:29,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 07:06:29,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 07:06:29,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 07:06:29,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 07:06:29,624 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 07:06:29,698 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 07:06:29,700 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 07:06:29,979 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 07:06:29,980 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 07:06:30,196 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 07:06:30,197 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-13 07:06:30,198 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:06:30 BoogieIcfgContainer [2024-10-13 07:06:30,198 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 07:06:30,200 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 07:06:30,200 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 07:06:30,202 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 07:06:30,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:06:29" (1/3) ... [2024-10-13 07:06:30,203 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af4e3e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:06:30, skipping insertion in model container [2024-10-13 07:06:30,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:06:29" (2/3) ... [2024-10-13 07:06:30,203 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af4e3e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:06:30, skipping insertion in model container [2024-10-13 07:06:30,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:06:30" (3/3) ... [2024-10-13 07:06:30,204 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2024-10-13 07:06:30,215 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 07:06:30,215 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 07:06:30,215 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 07:06:30,243 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-13 07:06:30,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 22 transitions, 58 flow [2024-10-13 07:06:30,291 INFO L124 PetriNetUnfolderBase]: 4/20 cut-off events. [2024-10-13 07:06:30,295 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 07:06:30,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 4/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 11 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2024-10-13 07:06:30,297 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 22 transitions, 58 flow [2024-10-13 07:06:30,299 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 19 transitions, 50 flow [2024-10-13 07:06:30,313 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 07:06:30,322 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;@52ee01d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 07:06:30,323 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-13 07:06:30,329 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 07:06:30,329 INFO L124 PetriNetUnfolderBase]: 4/18 cut-off events. [2024-10-13 07:06:30,329 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 07:06:30,329 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:30,330 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:06:30,330 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:06:30,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:06:30,334 INFO L85 PathProgramCache]: Analyzing trace with hash 2024243091, now seen corresponding path program 1 times [2024-10-13 07:06:30,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:06:30,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624182471] [2024-10-13 07:06:30,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:30,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:06:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:30,675 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 07:06:30,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:06:30,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624182471] [2024-10-13 07:06:30,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624182471] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:06:30,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:06:30,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 07:06:30,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686583169] [2024-10-13 07:06:30,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:06:30,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 07:06:30,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:06:30,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 07:06:30,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 07:06:30,710 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:06:30,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 07:06:30,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:06:30,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:06:30,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:06:30,771 INFO L124 PetriNetUnfolderBase]: 39/74 cut-off events. [2024-10-13 07:06:30,771 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-10-13 07:06:30,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 74 events. 39/74 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 120 event pairs, 22 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 120. Up to 72 conditions per place. [2024-10-13 07:06:30,773 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 16 selfloop transitions, 4 changer transitions 0/21 dead transitions. [2024-10-13 07:06:30,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 21 transitions, 94 flow [2024-10-13 07:06:30,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 07:06:30,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 07:06:30,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 31 transitions. [2024-10-13 07:06:30,783 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-10-13 07:06:30,784 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 50 flow. Second operand 3 states and 31 transitions. [2024-10-13 07:06:30,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 21 transitions, 94 flow [2024-10-13 07:06:30,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 21 transitions, 86 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 07:06:30,810 INFO L231 Difference]: Finished difference. Result has 21 places, 21 transitions, 64 flow [2024-10-13 07:06:30,811 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=21, PETRI_TRANSITIONS=21} [2024-10-13 07:06:30,816 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2024-10-13 07:06:30,817 INFO L471 AbstractCegarLoop]: Abstraction has has 21 places, 21 transitions, 64 flow [2024-10-13 07:06:30,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 07:06:30,817 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:30,817 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:06:30,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 07:06:30,818 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:06:30,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:06:30,823 INFO L85 PathProgramCache]: Analyzing trace with hash -637121085, now seen corresponding path program 1 times [2024-10-13 07:06:30,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:06:30,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986462187] [2024-10-13 07:06:30,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:30,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:06:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:30,994 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 07:06:30,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:06:30,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986462187] [2024-10-13 07:06:30,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986462187] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:06:30,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751489496] [2024-10-13 07:06:30,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:30,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:30,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:06:30,998 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 07:06:31,005 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 07:06:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:31,084 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-13 07:06:31,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:06:31,134 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 07:06:31,135 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:06:31,156 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 07:06:31,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751489496] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:06:31,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:06:31,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-10-13 07:06:31,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314789235] [2024-10-13 07:06:31,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:06:31,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 07:06:31,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:06:31,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 07:06:31,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-10-13 07:06:31,160 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:06:31,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 21 transitions, 64 flow. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 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 07:06:31,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:06:31,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:06:31,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:06:31,262 INFO L124 PetriNetUnfolderBase]: 39/80 cut-off events. [2024-10-13 07:06:31,263 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 07:06:31,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 80 events. 39/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 121 event pairs, 22 based on Foata normal form. 3/67 useless extension candidates. Maximal degree in co-relation 152. Up to 72 conditions per place. [2024-10-13 07:06:31,265 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 16 selfloop transitions, 10 changer transitions 0/27 dead transitions. [2024-10-13 07:06:31,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 140 flow [2024-10-13 07:06:31,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 07:06:31,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 07:06:31,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 50 transitions. [2024-10-13 07:06:31,267 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-10-13 07:06:31,267 INFO L175 Difference]: Start difference. First operand has 21 places, 21 transitions, 64 flow. Second operand 6 states and 50 transitions. [2024-10-13 07:06:31,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 140 flow [2024-10-13 07:06:31,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 27 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 07:06:31,269 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 126 flow [2024-10-13 07:06:31,269 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=126, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2024-10-13 07:06:31,269 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 6 predicate places. [2024-10-13 07:06:31,270 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 126 flow [2024-10-13 07:06:31,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 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 07:06:31,270 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:31,270 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:06:31,284 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 07:06:31,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:31,475 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:06:31,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:06:31,478 INFO L85 PathProgramCache]: Analyzing trace with hash 320875781, now seen corresponding path program 2 times [2024-10-13 07:06:31,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:06:31,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114878514] [2024-10-13 07:06:31,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:31,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:06:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-13 07:06:31,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:06:31,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114878514] [2024-10-13 07:06:31,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114878514] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:06:31,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127061619] [2024-10-13 07:06:31,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:06:31,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:31,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:06:31,644 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 07:06:31,645 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 07:06:31,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-13 07:06:31,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:06:31,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-13 07:06:31,764 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:06:31,848 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-13 07:06:31,849 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 07:06:31,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127061619] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:06:31,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 07:06:31,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-10-13 07:06:31,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011297186] [2024-10-13 07:06:31,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:06:31,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:06:31,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:06:31,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:06:31,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-10-13 07:06:31,851 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:06:31,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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 07:06:31,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:06:31,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:06:31,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:06:31,944 INFO L124 PetriNetUnfolderBase]: 61/124 cut-off events. [2024-10-13 07:06:31,944 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 07:06:31,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 124 events. 61/124 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 288 event pairs, 22 based on Foata normal form. 3/98 useless extension candidates. Maximal degree in co-relation 232. Up to 80 conditions per place. [2024-10-13 07:06:31,945 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 37 selfloop transitions, 3 changer transitions 2/43 dead transitions. [2024-10-13 07:06:31,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 43 transitions, 246 flow [2024-10-13 07:06:31,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:06:31,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:06:31,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2024-10-13 07:06:31,946 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2024-10-13 07:06:31,946 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 126 flow. Second operand 4 states and 47 transitions. [2024-10-13 07:06:31,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 43 transitions, 246 flow [2024-10-13 07:06:31,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 43 transitions, 230 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-13 07:06:31,948 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 130 flow [2024-10-13 07:06:31,948 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=130, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2024-10-13 07:06:31,949 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 10 predicate places. [2024-10-13 07:06:31,949 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 130 flow [2024-10-13 07:06:31,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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 07:06:31,949 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:31,949 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:06:31,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 07:06:32,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-10-13 07:06:32,155 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:06:32,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:06:32,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1510976613, now seen corresponding path program 3 times [2024-10-13 07:06:32,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:06:32,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973958107] [2024-10-13 07:06:32,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:32,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:06:32,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:32,288 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-13 07:06:32,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:06:32,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973958107] [2024-10-13 07:06:32,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973958107] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:06:32,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249520708] [2024-10-13 07:06:32,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:06:32,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:32,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:06:32,293 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 07:06:32,295 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 07:06:32,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-10-13 07:06:32,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:06:32,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-13 07:06:32,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:06:32,446 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-13 07:06:32,447 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 07:06:32,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249520708] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:06:32,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 07:06:32,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-10-13 07:06:32,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010789291] [2024-10-13 07:06:32,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:06:32,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:06:32,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:06:32,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:06:32,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-10-13 07:06:32,449 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:06:32,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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 07:06:32,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:06:32,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:06:32,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:06:32,545 INFO L124 PetriNetUnfolderBase]: 93/186 cut-off events. [2024-10-13 07:06:32,546 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2024-10-13 07:06:32,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 186 events. 93/186 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 522 event pairs, 39 based on Foata normal form. 2/151 useless extension candidates. Maximal degree in co-relation 445. Up to 126 conditions per place. [2024-10-13 07:06:32,547 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 42 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2024-10-13 07:06:32,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 46 transitions, 282 flow [2024-10-13 07:06:32,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:06:32,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:06:32,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2024-10-13 07:06:32,548 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-13 07:06:32,548 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 130 flow. Second operand 4 states and 44 transitions. [2024-10-13 07:06:32,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 46 transitions, 282 flow [2024-10-13 07:06:32,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 46 transitions, 271 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-10-13 07:06:32,550 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 146 flow [2024-10-13 07:06:32,550 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2024-10-13 07:06:32,550 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2024-10-13 07:06:32,550 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 146 flow [2024-10-13 07:06:32,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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 07:06:32,551 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:32,551 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:06:32,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-13 07:06:32,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:32,756 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:06:32,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:06:32,756 INFO L85 PathProgramCache]: Analyzing trace with hash 2094827693, now seen corresponding path program 4 times [2024-10-13 07:06:32,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:06:32,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599109295] [2024-10-13 07:06:32,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:32,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:06:32,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-13 07:06:32,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:06:32,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599109295] [2024-10-13 07:06:32,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599109295] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:06:32,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47440547] [2024-10-13 07:06:32,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:06:32,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:32,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:06:32,984 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 07:06:32,989 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 07:06:33,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:06:33,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:06:33,073 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 07:06:33,075 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:06:33,130 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-13 07:06:33,132 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:06:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-13 07:06:33,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47440547] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:06:33,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:06:33,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-13 07:06:33,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332608015] [2024-10-13 07:06:33,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:06:33,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 07:06:33,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:06:33,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 07:06:33,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2024-10-13 07:06:33,177 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:06:33,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 146 flow. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 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 07:06:33,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:06:33,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:06:33,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:06:33,278 INFO L124 PetriNetUnfolderBase]: 93/188 cut-off events. [2024-10-13 07:06:33,279 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2024-10-13 07:06:33,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 188 events. 93/188 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 512 event pairs, 67 based on Foata normal form. 1/164 useless extension candidates. Maximal degree in co-relation 512. Up to 175 conditions per place. [2024-10-13 07:06:33,281 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 20 selfloop transitions, 12 changer transitions 0/33 dead transitions. [2024-10-13 07:06:33,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 33 transitions, 222 flow [2024-10-13 07:06:33,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 07:06:33,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 07:06:33,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 51 transitions. [2024-10-13 07:06:33,283 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33116883116883117 [2024-10-13 07:06:33,284 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 146 flow. Second operand 7 states and 51 transitions. [2024-10-13 07:06:33,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 33 transitions, 222 flow [2024-10-13 07:06:33,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 33 transitions, 218 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-13 07:06:33,286 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 188 flow [2024-10-13 07:06:33,286 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=188, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2024-10-13 07:06:33,287 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 20 predicate places. [2024-10-13 07:06:33,288 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 188 flow [2024-10-13 07:06:33,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 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 07:06:33,288 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:33,288 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:06:33,301 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 07:06:33,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:33,493 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:06:33,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:06:33,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1695419871, now seen corresponding path program 5 times [2024-10-13 07:06:33,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:06:33,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844911256] [2024-10-13 07:06:33,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:33,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:06:33,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:33,733 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:33,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:06:33,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844911256] [2024-10-13 07:06:33,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844911256] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:06:33,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:06:33,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 07:06:33,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552156691] [2024-10-13 07:06:33,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:06:33,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:06:33,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:06:33,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:06:33,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:06:33,735 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:06:33,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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 07:06:33,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:06:33,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:06:33,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:06:33,861 INFO L124 PetriNetUnfolderBase]: 105/208 cut-off events. [2024-10-13 07:06:33,862 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2024-10-13 07:06:33,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 208 events. 105/208 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 627 event pairs, 39 based on Foata normal form. 8/190 useless extension candidates. Maximal degree in co-relation 542. Up to 126 conditions per place. [2024-10-13 07:06:33,863 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 45 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-10-13 07:06:33,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 50 transitions, 343 flow [2024-10-13 07:06:33,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:06:33,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:06:33,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2024-10-13 07:06:33,865 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-10-13 07:06:33,865 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 188 flow. Second operand 4 states and 46 transitions. [2024-10-13 07:06:33,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 50 transitions, 343 flow [2024-10-13 07:06:33,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 319 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-10-13 07:06:33,867 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 189 flow [2024-10-13 07:06:33,867 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2024-10-13 07:06:33,868 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 21 predicate places. [2024-10-13 07:06:33,868 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 189 flow [2024-10-13 07:06:33,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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 07:06:33,868 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:33,868 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:06:33,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-13 07:06:33,869 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:06:33,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:06:33,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1072477483, now seen corresponding path program 6 times [2024-10-13 07:06:33,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:06:33,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927778548] [2024-10-13 07:06:33,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:33,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:06:33,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:34,003 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:34,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:06:34,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927778548] [2024-10-13 07:06:34,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927778548] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:06:34,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:06:34,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 07:06:34,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046186854] [2024-10-13 07:06:34,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:06:34,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:06:34,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:06:34,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:06:34,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:06:34,005 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:06:34,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 189 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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 07:06:34,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:06:34,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:06:34,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:06:34,068 INFO L124 PetriNetUnfolderBase]: 89/174 cut-off events. [2024-10-13 07:06:34,068 INFO L125 PetriNetUnfolderBase]: For 208/208 co-relation queries the response was YES. [2024-10-13 07:06:34,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 582 conditions, 174 events. 89/174 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 462 event pairs, 12 based on Foata normal form. 8/159 useless extension candidates. Maximal degree in co-relation 513. Up to 115 conditions per place. [2024-10-13 07:06:34,069 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 38 selfloop transitions, 6 changer transitions 1/46 dead transitions. [2024-10-13 07:06:34,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 324 flow [2024-10-13 07:06:34,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:06:34,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:06:34,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 40 transitions. [2024-10-13 07:06:34,070 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-10-13 07:06:34,070 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 189 flow. Second operand 4 states and 40 transitions. [2024-10-13 07:06:34,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 324 flow [2024-10-13 07:06:34,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 317 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-13 07:06:34,073 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 212 flow [2024-10-13 07:06:34,073 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2024-10-13 07:06:34,073 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2024-10-13 07:06:34,073 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 212 flow [2024-10-13 07:06:34,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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 07:06:34,074 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:34,074 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:06:34,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-13 07:06:34,074 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:06:34,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:06:34,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1385481324, now seen corresponding path program 1 times [2024-10-13 07:06:34,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:06:34,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990674840] [2024-10-13 07:06:34,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:34,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:06:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-13 07:06:34,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:06:34,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990674840] [2024-10-13 07:06:34,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990674840] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:06:34,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:06:34,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 07:06:34,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126065799] [2024-10-13 07:06:34,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:06:34,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:06:34,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:06:34,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:06:34,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:06:34,257 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:06:34,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:06:34,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:06:34,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:06:34,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:06:34,324 INFO L124 PetriNetUnfolderBase]: 90/173 cut-off events. [2024-10-13 07:06:34,324 INFO L125 PetriNetUnfolderBase]: For 247/247 co-relation queries the response was YES. [2024-10-13 07:06:34,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 588 conditions, 173 events. 90/173 cut-off events. For 247/247 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 435 event pairs, 15 based on Foata normal form. 7/155 useless extension candidates. Maximal degree in co-relation 516. Up to 135 conditions per place. [2024-10-13 07:06:34,325 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 41 selfloop transitions, 7 changer transitions 1/50 dead transitions. [2024-10-13 07:06:34,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 50 transitions, 361 flow [2024-10-13 07:06:34,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:06:34,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:06:34,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 42 transitions. [2024-10-13 07:06:34,326 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-10-13 07:06:34,326 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 212 flow. Second operand 4 states and 42 transitions. [2024-10-13 07:06:34,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 50 transitions, 361 flow [2024-10-13 07:06:34,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 50 transitions, 345 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-10-13 07:06:34,328 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 239 flow [2024-10-13 07:06:34,328 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=239, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2024-10-13 07:06:34,329 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2024-10-13 07:06:34,329 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 239 flow [2024-10-13 07:06:34,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:06:34,329 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:34,329 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:06:34,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-13 07:06:34,329 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:06:34,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:06:34,330 INFO L85 PathProgramCache]: Analyzing trace with hash 134918016, now seen corresponding path program 2 times [2024-10-13 07:06:34,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:06:34,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810875211] [2024-10-13 07:06:34,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:34,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:06:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:34,482 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-13 07:06:34,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:06:34,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810875211] [2024-10-13 07:06:34,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810875211] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:06:34,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:06:34,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 07:06:34,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180993758] [2024-10-13 07:06:34,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:06:34,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:06:34,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:06:34,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:06:34,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:06:34,483 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:06:34,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 239 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:06:34,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:06:34,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:06:34,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:06:34,560 INFO L124 PetriNetUnfolderBase]: 80/153 cut-off events. [2024-10-13 07:06:34,560 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2024-10-13 07:06:34,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 560 conditions, 153 events. 80/153 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 354 event pairs, 27 based on Foata normal form. 7/137 useless extension candidates. Maximal degree in co-relation 487. Up to 118 conditions per place. [2024-10-13 07:06:34,562 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 41 selfloop transitions, 7 changer transitions 1/50 dead transitions. [2024-10-13 07:06:34,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 50 transitions, 390 flow [2024-10-13 07:06:34,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:06:34,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:06:34,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2024-10-13 07:06:34,565 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-10-13 07:06:34,565 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 239 flow. Second operand 4 states and 43 transitions. [2024-10-13 07:06:34,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 50 transitions, 390 flow [2024-10-13 07:06:34,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 50 transitions, 381 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-10-13 07:06:34,568 INFO L231 Difference]: Finished difference. Result has 50 places, 39 transitions, 262 flow [2024-10-13 07:06:34,569 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=50, PETRI_TRANSITIONS=39} [2024-10-13 07:06:34,569 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 28 predicate places. [2024-10-13 07:06:34,571 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 39 transitions, 262 flow [2024-10-13 07:06:34,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:06:34,571 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:34,571 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:06:34,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-13 07:06:34,571 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:06:34,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:06:34,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1888690876, now seen corresponding path program 1 times [2024-10-13 07:06:34,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:06:34,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004767971] [2024-10-13 07:06:34,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:34,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:06:34,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:36,071 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-13 07:06:36,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:06:36,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004767971] [2024-10-13 07:06:36,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004767971] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:06:36,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505059416] [2024-10-13 07:06:36,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:36,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:36,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:06:36,073 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 07:06:36,074 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 07:06:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:36,165 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-13 07:06:36,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:06:36,264 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:06:36,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-10-13 07:06:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:36,300 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:06:36,689 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-10-13 07:06:36,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 79 [2024-10-13 07:06:36,715 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:36,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505059416] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:06:36,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:06:36,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 28 [2024-10-13 07:06:36,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055113806] [2024-10-13 07:06:36,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:06:36,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-13 07:06:36,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:06:36,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-13 07:06:36,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2024-10-13 07:06:36,717 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:06:36,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 39 transitions, 262 flow. Second operand has 28 states, 28 states have (on average 4.785714285714286) internal successors, (134), 28 states have internal predecessors, (134), 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 07:06:36,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:06:36,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:06:36,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:06:37,785 INFO L124 PetriNetUnfolderBase]: 143/271 cut-off events. [2024-10-13 07:06:37,785 INFO L125 PetriNetUnfolderBase]: For 654/654 co-relation queries the response was YES. [2024-10-13 07:06:37,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 271 events. 143/271 cut-off events. For 654/654 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 821 event pairs, 12 based on Foata normal form. 1/221 useless extension candidates. Maximal degree in co-relation 877. Up to 99 conditions per place. [2024-10-13 07:06:37,787 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 46 selfloop transitions, 40 changer transitions 1/88 dead transitions. [2024-10-13 07:06:37,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 88 transitions, 705 flow [2024-10-13 07:06:37,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-13 07:06:37,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-13 07:06:37,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 150 transitions. [2024-10-13 07:06:37,791 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2840909090909091 [2024-10-13 07:06:37,791 INFO L175 Difference]: Start difference. First operand has 50 places, 39 transitions, 262 flow. Second operand 24 states and 150 transitions. [2024-10-13 07:06:37,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 88 transitions, 705 flow [2024-10-13 07:06:37,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 88 transitions, 671 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-10-13 07:06:37,794 INFO L231 Difference]: Finished difference. Result has 75 places, 59 transitions, 525 flow [2024-10-13 07:06:37,794 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=525, PETRI_PLACES=75, PETRI_TRANSITIONS=59} [2024-10-13 07:06:37,794 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 53 predicate places. [2024-10-13 07:06:37,795 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 59 transitions, 525 flow [2024-10-13 07:06:37,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.785714285714286) internal successors, (134), 28 states have internal predecessors, (134), 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 07:06:37,795 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:37,795 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:06:37,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-13 07:06:37,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-13 07:06:38,000 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:06:38,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:06:38,000 INFO L85 PathProgramCache]: Analyzing trace with hash 200974240, now seen corresponding path program 2 times [2024-10-13 07:06:38,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:06:38,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542404682] [2024-10-13 07:06:38,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:38,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:06:38,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:38,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:06:38,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542404682] [2024-10-13 07:06:38,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542404682] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:06:38,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075063299] [2024-10-13 07:06:38,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:06:38,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:38,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:06:38,570 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 07:06:38,571 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 07:06:38,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:06:38,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:06:38,662 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-13 07:06:38,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:06:38,730 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:06:38,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-10-13 07:06:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:38,755 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:06:39,081 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-10-13 07:06:39,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-10-13 07:06:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:39,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075063299] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:06:39,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:06:39,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2024-10-13 07:06:39,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049314613] [2024-10-13 07:06:39,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:06:39,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 07:06:39,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:06:39,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 07:06:39,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2024-10-13 07:06:39,164 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:06:39,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 59 transitions, 525 flow. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 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 07:06:39,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:06:39,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:06:39,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:06:39,466 INFO L124 PetriNetUnfolderBase]: 163/306 cut-off events. [2024-10-13 07:06:39,466 INFO L125 PetriNetUnfolderBase]: For 782/782 co-relation queries the response was YES. [2024-10-13 07:06:39,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1247 conditions, 306 events. 163/306 cut-off events. For 782/782 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 955 event pairs, 26 based on Foata normal form. 1/307 useless extension candidates. Maximal degree in co-relation 1176. Up to 218 conditions per place. [2024-10-13 07:06:39,469 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 56 selfloop transitions, 23 changer transitions 1/81 dead transitions. [2024-10-13 07:06:39,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 81 transitions, 772 flow [2024-10-13 07:06:39,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 07:06:39,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-13 07:06:39,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 79 transitions. [2024-10-13 07:06:39,470 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32644628099173556 [2024-10-13 07:06:39,470 INFO L175 Difference]: Start difference. First operand has 75 places, 59 transitions, 525 flow. Second operand 11 states and 79 transitions. [2024-10-13 07:06:39,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 81 transitions, 772 flow [2024-10-13 07:06:39,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 81 transitions, 634 flow, removed 37 selfloop flow, removed 11 redundant places. [2024-10-13 07:06:39,473 INFO L231 Difference]: Finished difference. Result has 77 places, 66 transitions, 497 flow [2024-10-13 07:06:39,474 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=497, PETRI_PLACES=77, PETRI_TRANSITIONS=66} [2024-10-13 07:06:39,475 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 55 predicate places. [2024-10-13 07:06:39,475 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 66 transitions, 497 flow [2024-10-13 07:06:39,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 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 07:06:39,475 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:39,475 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:06:39,490 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 07:06:39,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:39,676 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:06:39,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:06:39,677 INFO L85 PathProgramCache]: Analyzing trace with hash 988624800, now seen corresponding path program 3 times [2024-10-13 07:06:39,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:06:39,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492109623] [2024-10-13 07:06:39,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:39,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:06:39,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:40,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:06:40,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492109623] [2024-10-13 07:06:40,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492109623] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:06:40,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467697862] [2024-10-13 07:06:40,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:06:40,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:40,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:06:40,177 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 07:06:40,178 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 07:06:40,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-13 07:06:40,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:06:40,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-13 07:06:40,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:06:40,342 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:06:40,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-10-13 07:06:40,364 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:40,364 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:06:40,672 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-10-13 07:06:40,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-10-13 07:06:40,744 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:40,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467697862] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:06:40,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:06:40,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2024-10-13 07:06:40,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185985078] [2024-10-13 07:06:40,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:06:40,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 07:06:40,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:06:40,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 07:06:40,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-10-13 07:06:40,746 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:06:40,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 66 transitions, 497 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:06:40,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:06:40,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:06:40,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:06:41,132 INFO L124 PetriNetUnfolderBase]: 177/331 cut-off events. [2024-10-13 07:06:41,132 INFO L125 PetriNetUnfolderBase]: For 1039/1039 co-relation queries the response was YES. [2024-10-13 07:06:41,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1427 conditions, 331 events. 177/331 cut-off events. For 1039/1039 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1088 event pairs, 25 based on Foata normal form. 1/332 useless extension candidates. Maximal degree in co-relation 1369. Up to 234 conditions per place. [2024-10-13 07:06:41,135 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 61 selfloop transitions, 27 changer transitions 2/91 dead transitions. [2024-10-13 07:06:41,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 91 transitions, 794 flow [2024-10-13 07:06:41,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 07:06:41,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-13 07:06:41,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 88 transitions. [2024-10-13 07:06:41,136 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-10-13 07:06:41,137 INFO L175 Difference]: Start difference. First operand has 77 places, 66 transitions, 497 flow. Second operand 12 states and 88 transitions. [2024-10-13 07:06:41,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 91 transitions, 794 flow [2024-10-13 07:06:41,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 91 transitions, 733 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-10-13 07:06:41,141 INFO L231 Difference]: Finished difference. Result has 84 places, 74 transitions, 577 flow [2024-10-13 07:06:41,142 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=577, PETRI_PLACES=84, PETRI_TRANSITIONS=74} [2024-10-13 07:06:41,143 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 62 predicate places. [2024-10-13 07:06:41,143 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 74 transitions, 577 flow [2024-10-13 07:06:41,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:06:41,144 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:41,144 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:06:41,163 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 07:06:41,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:41,345 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:06:41,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:06:41,346 INFO L85 PathProgramCache]: Analyzing trace with hash 981795176, now seen corresponding path program 4 times [2024-10-13 07:06:41,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:06:41,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397563114] [2024-10-13 07:06:41,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:41,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:06:41,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:42,166 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:42,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:06:42,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397563114] [2024-10-13 07:06:42,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397563114] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:06:42,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010118040] [2024-10-13 07:06:42,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:06:42,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:42,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:06:42,169 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 07:06:42,169 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 07:06:42,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:06:42,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:06:42,266 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-13 07:06:42,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:06:42,319 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:06:42,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-10-13 07:06:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:42,368 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:06:42,698 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-10-13 07:06:42,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-10-13 07:06:42,783 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:42,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010118040] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:06:42,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:06:42,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-10-13 07:06:42,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276817556] [2024-10-13 07:06:42,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:06:42,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-13 07:06:42,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:06:42,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-13 07:06:42,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2024-10-13 07:06:42,788 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:06:42,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 74 transitions, 577 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 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 07:06:42,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:06:42,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:06:42,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:06:43,278 INFO L124 PetriNetUnfolderBase]: 174/334 cut-off events. [2024-10-13 07:06:43,278 INFO L125 PetriNetUnfolderBase]: For 1187/1187 co-relation queries the response was YES. [2024-10-13 07:06:43,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1571 conditions, 334 events. 174/334 cut-off events. For 1187/1187 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1131 event pairs, 25 based on Foata normal form. 3/335 useless extension candidates. Maximal degree in co-relation 1516. Up to 235 conditions per place. [2024-10-13 07:06:43,281 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 61 selfloop transitions, 23 changer transitions 7/92 dead transitions. [2024-10-13 07:06:43,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 92 transitions, 836 flow [2024-10-13 07:06:43,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-13 07:06:43,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-13 07:06:43,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 91 transitions. [2024-10-13 07:06:43,282 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-10-13 07:06:43,282 INFO L175 Difference]: Start difference. First operand has 84 places, 74 transitions, 577 flow. Second operand 13 states and 91 transitions. [2024-10-13 07:06:43,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 92 transitions, 836 flow [2024-10-13 07:06:43,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 92 transitions, 774 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-10-13 07:06:43,286 INFO L231 Difference]: Finished difference. Result has 91 places, 73 transitions, 566 flow [2024-10-13 07:06:43,287 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=566, PETRI_PLACES=91, PETRI_TRANSITIONS=73} [2024-10-13 07:06:43,289 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 69 predicate places. [2024-10-13 07:06:43,289 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 73 transitions, 566 flow [2024-10-13 07:06:43,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 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 07:06:43,289 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:43,289 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:06:43,301 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 07:06:43,489 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,SelfDestructingSolverStorable12 [2024-10-13 07:06:43,490 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:06:43,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:06:43,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1588593436, now seen corresponding path program 5 times [2024-10-13 07:06:43,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:06:43,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94725533] [2024-10-13 07:06:43,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:43,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:06:43,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:43,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:06:43,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94725533] [2024-10-13 07:06:43,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94725533] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:06:43,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121609959] [2024-10-13 07:06:43,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:06:43,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:43,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:06:43,947 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 07:06:43,948 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 07:06:44,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-13 07:06:44,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:06:44,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-13 07:06:44,076 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:06:44,152 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:06:44,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-10-13 07:06:44,194 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:44,194 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:06:44,491 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-10-13 07:06:44,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-10-13 07:06:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:44,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121609959] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:06:44,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:06:44,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 24 [2024-10-13 07:06:44,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461961035] [2024-10-13 07:06:44,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:06:44,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-13 07:06:44,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:06:44,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-13 07:06:44,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2024-10-13 07:06:44,574 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:06:44,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 73 transitions, 566 flow. Second operand has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 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 07:06:44,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:06:44,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:06:44,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:06:44,988 INFO L124 PetriNetUnfolderBase]: 171/325 cut-off events. [2024-10-13 07:06:44,988 INFO L125 PetriNetUnfolderBase]: For 1248/1248 co-relation queries the response was YES. [2024-10-13 07:06:44,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1576 conditions, 325 events. 171/325 cut-off events. For 1248/1248 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1076 event pairs, 27 based on Foata normal form. 1/326 useless extension candidates. Maximal degree in co-relation 1519. Up to 216 conditions per place. [2024-10-13 07:06:44,990 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 60 selfloop transitions, 27 changer transitions 4/92 dead transitions. [2024-10-13 07:06:44,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 92 transitions, 833 flow [2024-10-13 07:06:44,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-13 07:06:44,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-13 07:06:44,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 91 transitions. [2024-10-13 07:06:44,991 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-10-13 07:06:44,991 INFO L175 Difference]: Start difference. First operand has 91 places, 73 transitions, 566 flow. Second operand 13 states and 91 transitions. [2024-10-13 07:06:44,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 92 transitions, 833 flow [2024-10-13 07:06:44,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 92 transitions, 770 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-10-13 07:06:44,995 INFO L231 Difference]: Finished difference. Result has 91 places, 73 transitions, 577 flow [2024-10-13 07:06:44,995 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=577, PETRI_PLACES=91, PETRI_TRANSITIONS=73} [2024-10-13 07:06:44,996 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 69 predicate places. [2024-10-13 07:06:44,996 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 73 transitions, 577 flow [2024-10-13 07:06:44,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 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 07:06:44,996 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:44,996 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:06:45,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-13 07:06:45,196 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-13 07:06:45,197 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:06:45,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:06:45,198 INFO L85 PathProgramCache]: Analyzing trace with hash 2026960210, now seen corresponding path program 6 times [2024-10-13 07:06:45,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:06:45,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009714572] [2024-10-13 07:06:45,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:45,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:06:45,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:45,688 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:45,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:06:45,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009714572] [2024-10-13 07:06:45,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009714572] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:06:45,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251573712] [2024-10-13 07:06:45,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:06:45,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:45,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:06:45,691 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 07:06:45,692 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 07:06:45,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-13 07:06:45,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:06:45,796 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-13 07:06:45,798 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:06:45,915 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:06:45,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-10-13 07:06:45,944 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:45,944 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:06:46,254 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-10-13 07:06:46,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 79 [2024-10-13 07:06:46,287 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:46,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251573712] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:06:46,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:06:46,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2024-10-13 07:06:46,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130777189] [2024-10-13 07:06:46,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:06:46,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-13 07:06:46,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:06:46,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-13 07:06:46,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2024-10-13 07:06:46,289 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:06:46,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 73 transitions, 577 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 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 07:06:46,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:06:46,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:06:46,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:06:46,897 INFO L124 PetriNetUnfolderBase]: 227/426 cut-off events. [2024-10-13 07:06:46,898 INFO L125 PetriNetUnfolderBase]: For 2143/2143 co-relation queries the response was YES. [2024-10-13 07:06:46,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2196 conditions, 426 events. 227/426 cut-off events. For 2143/2143 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1584 event pairs, 29 based on Foata normal form. 1/427 useless extension candidates. Maximal degree in co-relation 2140. Up to 161 conditions per place. [2024-10-13 07:06:46,901 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 78 selfloop transitions, 37 changer transitions 3/119 dead transitions. [2024-10-13 07:06:46,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 119 transitions, 1172 flow [2024-10-13 07:06:46,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-13 07:06:46,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-13 07:06:46,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 104 transitions. [2024-10-13 07:06:46,902 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33766233766233766 [2024-10-13 07:06:46,902 INFO L175 Difference]: Start difference. First operand has 91 places, 73 transitions, 577 flow. Second operand 14 states and 104 transitions. [2024-10-13 07:06:46,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 119 transitions, 1172 flow [2024-10-13 07:06:46,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 119 transitions, 1091 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-10-13 07:06:46,907 INFO L231 Difference]: Finished difference. Result has 96 places, 85 transitions, 760 flow [2024-10-13 07:06:46,907 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=760, PETRI_PLACES=96, PETRI_TRANSITIONS=85} [2024-10-13 07:06:46,908 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 74 predicate places. [2024-10-13 07:06:46,908 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 85 transitions, 760 flow [2024-10-13 07:06:46,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 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 07:06:46,908 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:46,908 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:06:46,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-13 07:06:47,112 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,SelfDestructingSolverStorable14 [2024-10-13 07:06:47,113 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:06:47,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:06:47,113 INFO L85 PathProgramCache]: Analyzing trace with hash 24937234, now seen corresponding path program 7 times [2024-10-13 07:06:47,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:06:47,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161051903] [2024-10-13 07:06:47,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:47,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:06:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:47,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:06:47,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161051903] [2024-10-13 07:06:47,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161051903] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:06:47,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392263951] [2024-10-13 07:06:47,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 07:06:47,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:47,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:06:47,725 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 07:06:47,726 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 07:06:47,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:47,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-13 07:06:47,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:06:47,945 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:06:47,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-10-13 07:06:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:47,970 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:06:48,239 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-10-13 07:06:48,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-10-13 07:06:48,300 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:48,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392263951] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:06:48,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:06:48,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-10-13 07:06:48,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576228561] [2024-10-13 07:06:48,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:06:48,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-13 07:06:48,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:06:48,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-13 07:06:48,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2024-10-13 07:06:48,302 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:06:48,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 85 transitions, 760 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 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 07:06:48,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:06:48,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:06:48,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:06:48,806 INFO L124 PetriNetUnfolderBase]: 238/448 cut-off events. [2024-10-13 07:06:48,807 INFO L125 PetriNetUnfolderBase]: For 2706/2706 co-relation queries the response was YES. [2024-10-13 07:06:48,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2479 conditions, 448 events. 238/448 cut-off events. For 2706/2706 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1701 event pairs, 64 based on Foata normal form. 4/452 useless extension candidates. Maximal degree in co-relation 2420. Up to 337 conditions per place. [2024-10-13 07:06:48,811 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 74 selfloop transitions, 27 changer transitions 8/110 dead transitions. [2024-10-13 07:06:48,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 110 transitions, 1138 flow [2024-10-13 07:06:48,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-13 07:06:48,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-13 07:06:48,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 91 transitions. [2024-10-13 07:06:48,812 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-10-13 07:06:48,812 INFO L175 Difference]: Start difference. First operand has 96 places, 85 transitions, 760 flow. Second operand 13 states and 91 transitions. [2024-10-13 07:06:48,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 110 transitions, 1138 flow [2024-10-13 07:06:48,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 110 transitions, 997 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-10-13 07:06:48,820 INFO L231 Difference]: Finished difference. Result has 104 places, 92 transitions, 781 flow [2024-10-13 07:06:48,820 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=781, PETRI_PLACES=104, PETRI_TRANSITIONS=92} [2024-10-13 07:06:48,821 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 82 predicate places. [2024-10-13 07:06:48,821 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 92 transitions, 781 flow [2024-10-13 07:06:48,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 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 07:06:48,821 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:48,821 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:06:48,838 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 07:06:49,022 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,SelfDestructingSolverStorable15 [2024-10-13 07:06:49,023 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:06:49,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:06:49,024 INFO L85 PathProgramCache]: Analyzing trace with hash -933415756, now seen corresponding path program 8 times [2024-10-13 07:06:49,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:06:49,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429764894] [2024-10-13 07:06:49,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:49,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:06:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:49,593 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:49,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:06:49,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429764894] [2024-10-13 07:06:49,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429764894] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:06:49,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004685634] [2024-10-13 07:06:49,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:06:49,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:49,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:06:49,595 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 07:06:49,599 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 07:06:49,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:06:49,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:06:49,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-13 07:06:49,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:06:49,797 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:06:49,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-10-13 07:06:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:49,823 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:06:50,111 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-10-13 07:06:50,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-10-13 07:06:50,175 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:50,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004685634] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:06:50,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:06:50,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2024-10-13 07:06:50,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821065408] [2024-10-13 07:06:50,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:06:50,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 07:06:50,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:06:50,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 07:06:50,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2024-10-13 07:06:50,177 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:06:50,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 92 transitions, 781 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 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 07:06:50,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:06:50,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:06:50,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:06:50,636 INFO L124 PetriNetUnfolderBase]: 238/447 cut-off events. [2024-10-13 07:06:50,636 INFO L125 PetriNetUnfolderBase]: For 2737/2737 co-relation queries the response was YES. [2024-10-13 07:06:50,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2413 conditions, 447 events. 238/447 cut-off events. For 2737/2737 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1702 event pairs, 61 based on Foata normal form. 3/450 useless extension candidates. Maximal degree in co-relation 2352. Up to 336 conditions per place. [2024-10-13 07:06:50,639 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 79 selfloop transitions, 28 changer transitions 7/115 dead transitions. [2024-10-13 07:06:50,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 115 transitions, 1186 flow [2024-10-13 07:06:50,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-13 07:06:50,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-13 07:06:50,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 90 transitions. [2024-10-13 07:06:50,640 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3146853146853147 [2024-10-13 07:06:50,640 INFO L175 Difference]: Start difference. First operand has 104 places, 92 transitions, 781 flow. Second operand 13 states and 90 transitions. [2024-10-13 07:06:50,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 115 transitions, 1186 flow [2024-10-13 07:06:50,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 115 transitions, 1125 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-10-13 07:06:50,647 INFO L231 Difference]: Finished difference. Result has 112 places, 97 transitions, 874 flow [2024-10-13 07:06:50,647 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=874, PETRI_PLACES=112, PETRI_TRANSITIONS=97} [2024-10-13 07:06:50,647 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 90 predicate places. [2024-10-13 07:06:50,647 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 97 transitions, 874 flow [2024-10-13 07:06:50,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 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 07:06:50,648 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:50,648 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:06:50,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-13 07:06:50,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-13 07:06:50,852 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:06:50,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:06:50,852 INFO L85 PathProgramCache]: Analyzing trace with hash -73946580, now seen corresponding path program 9 times [2024-10-13 07:06:50,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:06:50,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552781991] [2024-10-13 07:06:50,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:50,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:06:50,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:51,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:06:51,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552781991] [2024-10-13 07:06:51,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552781991] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:06:51,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819822197] [2024-10-13 07:06:51,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:06:51,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:51,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:06:51,387 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:06:51,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-13 07:06:51,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-13 07:06:51,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:06:51,500 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-13 07:06:51,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:06:51,565 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:06:51,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-10-13 07:06:51,604 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:51,605 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:06:51,858 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-10-13 07:06:51,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-10-13 07:06:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:51,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819822197] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:06:51,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:06:51,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2024-10-13 07:06:51,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991990656] [2024-10-13 07:06:51,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:06:51,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 07:06:51,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:06:51,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 07:06:51,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-10-13 07:06:51,928 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:06:51,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 97 transitions, 874 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 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 07:06:51,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:06:51,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:06:51,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:06:52,321 INFO L124 PetriNetUnfolderBase]: 234/439 cut-off events. [2024-10-13 07:06:52,322 INFO L125 PetriNetUnfolderBase]: For 2894/2894 co-relation queries the response was YES. [2024-10-13 07:06:52,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2453 conditions, 439 events. 234/439 cut-off events. For 2894/2894 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1635 event pairs, 62 based on Foata normal form. 1/440 useless extension candidates. Maximal degree in co-relation 2389. Up to 328 conditions per place. [2024-10-13 07:06:52,325 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 80 selfloop transitions, 29 changer transitions 3/113 dead transitions. [2024-10-13 07:06:52,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 113 transitions, 1193 flow [2024-10-13 07:06:52,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 07:06:52,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-13 07:06:52,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 84 transitions. [2024-10-13 07:06:52,326 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-10-13 07:06:52,326 INFO L175 Difference]: Start difference. First operand has 112 places, 97 transitions, 874 flow. Second operand 12 states and 84 transitions. [2024-10-13 07:06:52,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 113 transitions, 1193 flow [2024-10-13 07:06:52,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 113 transitions, 1112 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-10-13 07:06:52,334 INFO L231 Difference]: Finished difference. Result has 113 places, 98 transitions, 878 flow [2024-10-13 07:06:52,334 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=878, PETRI_PLACES=113, PETRI_TRANSITIONS=98} [2024-10-13 07:06:52,335 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 91 predicate places. [2024-10-13 07:06:52,335 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 98 transitions, 878 flow [2024-10-13 07:06:52,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 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 07:06:52,335 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:52,335 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:06:52,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-13 07:06:52,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-13 07:06:52,537 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:06:52,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:06:52,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1655100754, now seen corresponding path program 10 times [2024-10-13 07:06:52,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:06:52,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817224044] [2024-10-13 07:06:52,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:52,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:06:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:52,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:06:52,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817224044] [2024-10-13 07:06:52,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817224044] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:06:52,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852649896] [2024-10-13 07:06:52,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:06:52,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:52,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:06:52,929 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:06:52,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-13 07:06:53,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:06:53,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:06:53,034 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-13 07:06:53,035 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:06:53,073 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:06:53,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-10-13 07:06:53,084 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:53,084 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:06:53,320 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-10-13 07:06:53,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-10-13 07:06:53,381 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:53,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852649896] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:06:53,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:06:53,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2024-10-13 07:06:53,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093981539] [2024-10-13 07:06:53,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:06:53,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 07:06:53,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:06:53,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 07:06:53,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-10-13 07:06:53,383 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:06:53,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 98 transitions, 878 flow. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:06:53,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:06:53,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:06:53,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:06:53,683 INFO L124 PetriNetUnfolderBase]: 234/437 cut-off events. [2024-10-13 07:06:53,683 INFO L125 PetriNetUnfolderBase]: For 2812/2812 co-relation queries the response was YES. [2024-10-13 07:06:53,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2433 conditions, 437 events. 234/437 cut-off events. For 2812/2812 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1616 event pairs, 65 based on Foata normal form. 1/438 useless extension candidates. Maximal degree in co-relation 2370. Up to 330 conditions per place. [2024-10-13 07:06:53,686 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 82 selfloop transitions, 27 changer transitions 1/111 dead transitions. [2024-10-13 07:06:53,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 111 transitions, 1169 flow [2024-10-13 07:06:53,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 07:06:53,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-13 07:06:53,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 77 transitions. [2024-10-13 07:06:53,687 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-10-13 07:06:53,687 INFO L175 Difference]: Start difference. First operand has 113 places, 98 transitions, 878 flow. Second operand 11 states and 77 transitions. [2024-10-13 07:06:53,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 111 transitions, 1169 flow [2024-10-13 07:06:53,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 111 transitions, 1101 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-10-13 07:06:53,693 INFO L231 Difference]: Finished difference. Result has 114 places, 99 transitions, 888 flow [2024-10-13 07:06:53,693 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=888, PETRI_PLACES=114, PETRI_TRANSITIONS=99} [2024-10-13 07:06:53,694 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 92 predicate places. [2024-10-13 07:06:53,694 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 99 transitions, 888 flow [2024-10-13 07:06:53,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:06:53,694 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:53,694 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:06:53,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-13 07:06:53,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:53,898 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:06:53,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:06:53,899 INFO L85 PathProgramCache]: Analyzing trace with hash -938964483, now seen corresponding path program 11 times [2024-10-13 07:06:53,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:06:53,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584423070] [2024-10-13 07:06:53,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:53,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:06:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:54,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:06:54,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584423070] [2024-10-13 07:06:54,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584423070] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:06:54,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801089496] [2024-10-13 07:06:54,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:06:54,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:54,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:06:54,380 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:06:54,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-13 07:06:54,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-13 07:06:54,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:06:54,520 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-13 07:06:54,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:06:54,627 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:54,627 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:06:54,734 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-10-13 07:06:54,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-10-13 07:06:54,751 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:54,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801089496] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:06:54,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:06:54,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-10-13 07:06:54,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862515650] [2024-10-13 07:06:54,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:06:54,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 07:06:54,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:06:54,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 07:06:54,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2024-10-13 07:06:54,752 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:06:54,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 99 transitions, 888 flow. Second operand has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 states have internal predecessors, (112), 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 07:06:54,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:06:54,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:06:54,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:06:55,083 INFO L124 PetriNetUnfolderBase]: 248/461 cut-off events. [2024-10-13 07:06:55,083 INFO L125 PetriNetUnfolderBase]: For 3060/3060 co-relation queries the response was YES. [2024-10-13 07:06:55,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2599 conditions, 461 events. 248/461 cut-off events. For 3060/3060 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1774 event pairs, 33 based on Foata normal form. 5/466 useless extension candidates. Maximal degree in co-relation 2535. Up to 199 conditions per place. [2024-10-13 07:06:55,092 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 93 selfloop transitions, 37 changer transitions 0/131 dead transitions. [2024-10-13 07:06:55,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 131 transitions, 1400 flow [2024-10-13 07:06:55,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 07:06:55,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-13 07:06:55,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 84 transitions. [2024-10-13 07:06:55,100 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-10-13 07:06:55,100 INFO L175 Difference]: Start difference. First operand has 114 places, 99 transitions, 888 flow. Second operand 10 states and 84 transitions. [2024-10-13 07:06:55,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 131 transitions, 1400 flow [2024-10-13 07:06:55,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 131 transitions, 1342 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-10-13 07:06:55,116 INFO L231 Difference]: Finished difference. Result has 116 places, 101 transitions, 948 flow [2024-10-13 07:06:55,116 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=948, PETRI_PLACES=116, PETRI_TRANSITIONS=101} [2024-10-13 07:06:55,116 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 94 predicate places. [2024-10-13 07:06:55,116 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 101 transitions, 948 flow [2024-10-13 07:06:55,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 states have internal predecessors, (112), 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 07:06:55,120 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:55,120 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:06:55,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-13 07:06:55,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:55,321 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:06:55,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:06:55,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1048426644, now seen corresponding path program 12 times [2024-10-13 07:06:55,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:06:55,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810043107] [2024-10-13 07:06:55,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:55,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:06:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:55,719 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:55,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:06:55,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810043107] [2024-10-13 07:06:55,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810043107] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:06:55,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789936154] [2024-10-13 07:06:55,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:06:55,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:55,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:06:55,722 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:06:55,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-13 07:06:55,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-13 07:06:55,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:06:55,833 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-13 07:06:55,834 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:06:56,000 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:56,001 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:06:56,112 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-10-13 07:06:56,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-10-13 07:06:56,156 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:56,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789936154] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:06:56,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:06:56,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-10-13 07:06:56,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880592066] [2024-10-13 07:06:56,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:06:56,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 07:06:56,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:06:56,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 07:06:56,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2024-10-13 07:06:56,158 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:06:56,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 101 transitions, 948 flow. Second operand has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 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 07:06:56,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:06:56,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:06:56,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:06:56,465 INFO L124 PetriNetUnfolderBase]: 251/474 cut-off events. [2024-10-13 07:06:56,465 INFO L125 PetriNetUnfolderBase]: For 3461/3461 co-relation queries the response was YES. [2024-10-13 07:06:56,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2726 conditions, 474 events. 251/474 cut-off events. For 3461/3461 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 1898 event pairs, 44 based on Foata normal form. 3/477 useless extension candidates. Maximal degree in co-relation 2660. Up to 183 conditions per place. [2024-10-13 07:06:56,469 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 89 selfloop transitions, 36 changer transitions 14/140 dead transitions. [2024-10-13 07:06:56,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 140 transitions, 1525 flow [2024-10-13 07:06:56,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 07:06:56,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-13 07:06:56,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 77 transitions. [2024-10-13 07:06:56,470 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-10-13 07:06:56,470 INFO L175 Difference]: Start difference. First operand has 116 places, 101 transitions, 948 flow. Second operand 9 states and 77 transitions. [2024-10-13 07:06:56,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 140 transitions, 1525 flow [2024-10-13 07:06:56,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 140 transitions, 1411 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-10-13 07:06:56,479 INFO L231 Difference]: Finished difference. Result has 120 places, 102 transitions, 958 flow [2024-10-13 07:06:56,479 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=958, PETRI_PLACES=120, PETRI_TRANSITIONS=102} [2024-10-13 07:06:56,479 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 98 predicate places. [2024-10-13 07:06:56,479 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 102 transitions, 958 flow [2024-10-13 07:06:56,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 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 07:06:56,479 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:56,479 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:06:56,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-13 07:06:56,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:56,684 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:06:56,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:06:56,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1740738131, now seen corresponding path program 13 times [2024-10-13 07:06:56,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:06:56,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332340321] [2024-10-13 07:06:56,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:56,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:06:56,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:57,066 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:57,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:06:57,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332340321] [2024-10-13 07:06:57,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332340321] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:06:57,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080061170] [2024-10-13 07:06:57,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 07:06:57,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:57,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:06:57,069 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:06:57,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-13 07:06:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:57,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-13 07:06:57,186 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:06:57,267 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:57,267 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:06:57,384 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-10-13 07:06:57,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-10-13 07:06:57,393 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:57,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080061170] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:06:57,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:06:57,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-10-13 07:06:57,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008789380] [2024-10-13 07:06:57,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:06:57,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 07:06:57,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:06:57,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 07:06:57,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-10-13 07:06:57,394 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:06:57,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 102 transitions, 958 flow. Second operand has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 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 07:06:57,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:06:57,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:06:57,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:06:57,779 INFO L124 PetriNetUnfolderBase]: 273/506 cut-off events. [2024-10-13 07:06:57,779 INFO L125 PetriNetUnfolderBase]: For 3871/3871 co-relation queries the response was YES. [2024-10-13 07:06:57,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3002 conditions, 506 events. 273/506 cut-off events. For 3871/3871 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2032 event pairs, 30 based on Foata normal form. 5/511 useless extension candidates. Maximal degree in co-relation 2934. Up to 189 conditions per place. [2024-10-13 07:06:57,783 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 98 selfloop transitions, 43 changer transitions 0/142 dead transitions. [2024-10-13 07:06:57,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 142 transitions, 1563 flow [2024-10-13 07:06:57,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 07:06:57,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-13 07:06:57,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 100 transitions. [2024-10-13 07:06:57,784 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-10-13 07:06:57,784 INFO L175 Difference]: Start difference. First operand has 120 places, 102 transitions, 958 flow. Second operand 12 states and 100 transitions. [2024-10-13 07:06:57,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 142 transitions, 1563 flow [2024-10-13 07:06:57,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 142 transitions, 1459 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-10-13 07:06:57,794 INFO L231 Difference]: Finished difference. Result has 126 places, 107 transitions, 1038 flow [2024-10-13 07:06:57,794 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1038, PETRI_PLACES=126, PETRI_TRANSITIONS=107} [2024-10-13 07:06:57,794 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 104 predicate places. [2024-10-13 07:06:57,794 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 107 transitions, 1038 flow [2024-10-13 07:06:57,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 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 07:06:57,795 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:57,795 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:06:57,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-13 07:06:57,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:57,996 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:06:57,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:06:57,996 INFO L85 PathProgramCache]: Analyzing trace with hash -791224846, now seen corresponding path program 14 times [2024-10-13 07:06:57,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:06:57,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197935703] [2024-10-13 07:06:57,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:57,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:06:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:58,505 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:58,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:06:58,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197935703] [2024-10-13 07:06:58,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197935703] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:06:58,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019252858] [2024-10-13 07:06:58,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:06:58,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:58,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:06:58,508 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:06:58,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-13 07:06:58,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:06:58,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:06:58,627 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-13 07:06:58,628 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:06:58,802 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:06:58,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-10-13 07:06:58,838 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:58,839 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:06:58,988 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-10-13 07:06:58,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-10-13 07:06:59,033 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:06:59,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019252858] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:06:59,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:06:59,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 21 [2024-10-13 07:06:59,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272413736] [2024-10-13 07:06:59,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:06:59,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 07:06:59,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:06:59,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 07:06:59,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-10-13 07:06:59,035 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:06:59,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 107 transitions, 1038 flow. Second operand has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 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 07:06:59,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:06:59,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:06:59,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:06:59,982 INFO L124 PetriNetUnfolderBase]: 289/551 cut-off events. [2024-10-13 07:06:59,982 INFO L125 PetriNetUnfolderBase]: For 4468/4468 co-relation queries the response was YES. [2024-10-13 07:06:59,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3250 conditions, 551 events. 289/551 cut-off events. For 4468/4468 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2330 event pairs, 61 based on Foata normal form. 6/557 useless extension candidates. Maximal degree in co-relation 3181. Up to 235 conditions per place. [2024-10-13 07:06:59,987 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 104 selfloop transitions, 41 changer transitions 6/152 dead transitions. [2024-10-13 07:06:59,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 152 transitions, 1664 flow [2024-10-13 07:06:59,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-13 07:06:59,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-13 07:06:59,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 120 transitions. [2024-10-13 07:06:59,988 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-10-13 07:06:59,988 INFO L175 Difference]: Start difference. First operand has 126 places, 107 transitions, 1038 flow. Second operand 14 states and 120 transitions. [2024-10-13 07:06:59,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 152 transitions, 1664 flow [2024-10-13 07:06:59,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 152 transitions, 1584 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-10-13 07:06:59,998 INFO L231 Difference]: Finished difference. Result has 135 places, 109 transitions, 1090 flow [2024-10-13 07:06:59,998 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=959, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1090, PETRI_PLACES=135, PETRI_TRANSITIONS=109} [2024-10-13 07:06:59,998 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 113 predicate places. [2024-10-13 07:06:59,998 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 109 transitions, 1090 flow [2024-10-13 07:06:59,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 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 07:06:59,998 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:59,999 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:00,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-13 07:07:00,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:00,203 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:00,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:00,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1283844297, now seen corresponding path program 15 times [2024-10-13 07:07:00,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:00,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137449521] [2024-10-13 07:07:00,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:00,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:00,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:00,592 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:00,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:00,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137449521] [2024-10-13 07:07:00,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137449521] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:00,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362178619] [2024-10-13 07:07:00,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:07:00,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:00,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:00,594 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:00,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-13 07:07:00,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-13 07:07:00,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:07:00,714 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-13 07:07:00,715 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:00,859 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:07:00,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-10-13 07:07:00,924 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:00,924 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:01,080 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-10-13 07:07:01,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-10-13 07:07:01,100 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:01,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362178619] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:01,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:01,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 21 [2024-10-13 07:07:01,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577141853] [2024-10-13 07:07:01,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:01,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 07:07:01,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:01,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 07:07:01,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-10-13 07:07:01,102 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:01,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 109 transitions, 1090 flow. Second operand has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:01,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:01,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:01,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:02,225 INFO L124 PetriNetUnfolderBase]: 347/689 cut-off events. [2024-10-13 07:07:02,225 INFO L125 PetriNetUnfolderBase]: For 5557/5557 co-relation queries the response was YES. [2024-10-13 07:07:02,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4076 conditions, 689 events. 347/689 cut-off events. For 5557/5557 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3272 event pairs, 18 based on Foata normal form. 13/702 useless extension candidates. Maximal degree in co-relation 4004. Up to 256 conditions per place. [2024-10-13 07:07:02,231 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 129 selfloop transitions, 77 changer transitions 8/215 dead transitions. [2024-10-13 07:07:02,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 215 transitions, 2356 flow [2024-10-13 07:07:02,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-13 07:07:02,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-13 07:07:02,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 199 transitions. [2024-10-13 07:07:02,233 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3768939393939394 [2024-10-13 07:07:02,233 INFO L175 Difference]: Start difference. First operand has 135 places, 109 transitions, 1090 flow. Second operand 24 states and 199 transitions. [2024-10-13 07:07:02,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 215 transitions, 2356 flow [2024-10-13 07:07:02,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 215 transitions, 2225 flow, removed 14 selfloop flow, removed 11 redundant places. [2024-10-13 07:07:02,247 INFO L231 Difference]: Finished difference. Result has 156 places, 136 transitions, 1576 flow [2024-10-13 07:07:02,247 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1576, PETRI_PLACES=156, PETRI_TRANSITIONS=136} [2024-10-13 07:07:02,247 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 134 predicate places. [2024-10-13 07:07:02,247 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 136 transitions, 1576 flow [2024-10-13 07:07:02,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:02,248 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:02,248 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:02,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-13 07:07:02,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:02,448 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:02,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:02,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1643558270, now seen corresponding path program 16 times [2024-10-13 07:07:02,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:02,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815384635] [2024-10-13 07:07:02,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:02,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:02,975 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:02,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:02,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815384635] [2024-10-13 07:07:02,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815384635] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:02,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496522743] [2024-10-13 07:07:02,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:07:02,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:02,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:02,981 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:02,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-13 07:07:03,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:07:03,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:07:03,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 07:07:03,109 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:03,213 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:03,213 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:03,334 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-10-13 07:07:03,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-10-13 07:07:03,355 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:03,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496522743] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:03,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:03,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-10-13 07:07:03,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750630741] [2024-10-13 07:07:03,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:03,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 07:07:03,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:03,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 07:07:03,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-10-13 07:07:03,357 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:03,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 136 transitions, 1576 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:03,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:03,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:03,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:03,718 INFO L124 PetriNetUnfolderBase]: 334/651 cut-off events. [2024-10-13 07:07:03,719 INFO L125 PetriNetUnfolderBase]: For 7224/7224 co-relation queries the response was YES. [2024-10-13 07:07:03,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4458 conditions, 651 events. 334/651 cut-off events. For 7224/7224 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2963 event pairs, 84 based on Foata normal form. 3/654 useless extension candidates. Maximal degree in co-relation 4376. Up to 329 conditions per place. [2024-10-13 07:07:03,727 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 111 selfloop transitions, 38 changer transitions 8/158 dead transitions. [2024-10-13 07:07:03,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 158 transitions, 2086 flow [2024-10-13 07:07:03,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 07:07:03,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-13 07:07:03,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 75 transitions. [2024-10-13 07:07:03,729 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-10-13 07:07:03,729 INFO L175 Difference]: Start difference. First operand has 156 places, 136 transitions, 1576 flow. Second operand 9 states and 75 transitions. [2024-10-13 07:07:03,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 158 transitions, 2086 flow [2024-10-13 07:07:03,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 158 transitions, 1825 flow, removed 87 selfloop flow, removed 11 redundant places. [2024-10-13 07:07:03,755 INFO L231 Difference]: Finished difference. Result has 154 places, 134 transitions, 1388 flow [2024-10-13 07:07:03,756 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1331, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1388, PETRI_PLACES=154, PETRI_TRANSITIONS=134} [2024-10-13 07:07:03,756 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 132 predicate places. [2024-10-13 07:07:03,756 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 134 transitions, 1388 flow [2024-10-13 07:07:03,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:03,757 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:03,757 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:03,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-10-13 07:07:03,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-13 07:07:03,958 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:03,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:03,958 INFO L85 PathProgramCache]: Analyzing trace with hash -358502965, now seen corresponding path program 17 times [2024-10-13 07:07:03,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:03,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674008636] [2024-10-13 07:07:03,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:03,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:03,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:04,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:04,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674008636] [2024-10-13 07:07:04,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674008636] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:04,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704874469] [2024-10-13 07:07:04,457 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:07:04,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:04,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:04,461 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:04,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-13 07:07:04,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-13 07:07:04,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:07:04,672 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-13 07:07:04,673 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:04,814 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:07:04,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-10-13 07:07:04,872 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:04,872 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:05,065 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-10-13 07:07:05,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-10-13 07:07:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:05,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704874469] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:05,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:05,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2024-10-13 07:07:05,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861399902] [2024-10-13 07:07:05,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:05,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 07:07:05,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:05,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 07:07:05,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2024-10-13 07:07:05,093 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:05,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 134 transitions, 1388 flow. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:05,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:05,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:05,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:05,767 INFO L124 PetriNetUnfolderBase]: 316/589 cut-off events. [2024-10-13 07:07:05,768 INFO L125 PetriNetUnfolderBase]: For 5871/5871 co-relation queries the response was YES. [2024-10-13 07:07:05,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3823 conditions, 589 events. 316/589 cut-off events. For 5871/5871 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2494 event pairs, 20 based on Foata normal form. 10/599 useless extension candidates. Maximal degree in co-relation 3740. Up to 209 conditions per place. [2024-10-13 07:07:05,773 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 115 selfloop transitions, 60 changer transitions 6/182 dead transitions. [2024-10-13 07:07:05,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 182 transitions, 2207 flow [2024-10-13 07:07:05,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-13 07:07:05,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-13 07:07:05,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 145 transitions. [2024-10-13 07:07:05,775 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34688995215311 [2024-10-13 07:07:05,775 INFO L175 Difference]: Start difference. First operand has 154 places, 134 transitions, 1388 flow. Second operand 19 states and 145 transitions. [2024-10-13 07:07:05,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 182 transitions, 2207 flow [2024-10-13 07:07:05,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 182 transitions, 2083 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-10-13 07:07:05,792 INFO L231 Difference]: Finished difference. Result has 157 places, 130 transitions, 1381 flow [2024-10-13 07:07:05,792 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1381, PETRI_PLACES=157, PETRI_TRANSITIONS=130} [2024-10-13 07:07:05,792 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 135 predicate places. [2024-10-13 07:07:05,793 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 130 transitions, 1381 flow [2024-10-13 07:07:05,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:05,793 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:05,793 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:05,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-10-13 07:07:05,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-13 07:07:05,998 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:05,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:05,998 INFO L85 PathProgramCache]: Analyzing trace with hash -588555722, now seen corresponding path program 18 times [2024-10-13 07:07:05,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:05,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6752177] [2024-10-13 07:07:05,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:05,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:06,405 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:06,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:06,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6752177] [2024-10-13 07:07:06,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6752177] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:06,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264973408] [2024-10-13 07:07:06,406 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:07:06,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:06,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:06,407 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:06,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-13 07:07:06,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-13 07:07:06,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:07:06,537 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-13 07:07:06,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:06,694 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-13 07:07:06,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-10-13 07:07:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:06,699 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:06,815 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-13 07:07:06,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-10-13 07:07:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:06,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264973408] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:06,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:06,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-10-13 07:07:06,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654651053] [2024-10-13 07:07:06,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:06,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 07:07:06,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:06,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 07:07:06,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2024-10-13 07:07:06,875 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:06,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 130 transitions, 1381 flow. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:06,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:06,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:06,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:07,161 INFO L124 PetriNetUnfolderBase]: 321/596 cut-off events. [2024-10-13 07:07:07,161 INFO L125 PetriNetUnfolderBase]: For 6115/6115 co-relation queries the response was YES. [2024-10-13 07:07:07,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3893 conditions, 596 events. 321/596 cut-off events. For 6115/6115 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2493 event pairs, 115 based on Foata normal form. 4/600 useless extension candidates. Maximal degree in co-relation 3813. Up to 505 conditions per place. [2024-10-13 07:07:07,171 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 120 selfloop transitions, 24 changer transitions 0/145 dead transitions. [2024-10-13 07:07:07,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 145 transitions, 1826 flow [2024-10-13 07:07:07,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 07:07:07,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-13 07:07:07,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 68 transitions. [2024-10-13 07:07:07,172 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3434343434343434 [2024-10-13 07:07:07,172 INFO L175 Difference]: Start difference. First operand has 157 places, 130 transitions, 1381 flow. Second operand 9 states and 68 transitions. [2024-10-13 07:07:07,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 145 transitions, 1826 flow [2024-10-13 07:07:07,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 145 transitions, 1616 flow, removed 20 selfloop flow, removed 22 redundant places. [2024-10-13 07:07:07,186 INFO L231 Difference]: Finished difference. Result has 142 places, 131 transitions, 1253 flow [2024-10-13 07:07:07,186 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1179, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1253, PETRI_PLACES=142, PETRI_TRANSITIONS=131} [2024-10-13 07:07:07,186 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 120 predicate places. [2024-10-13 07:07:07,186 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 131 transitions, 1253 flow [2024-10-13 07:07:07,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:07,187 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:07,187 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:07,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-10-13 07:07:07,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-13 07:07:07,389 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:07,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:07,390 INFO L85 PathProgramCache]: Analyzing trace with hash 481562002, now seen corresponding path program 19 times [2024-10-13 07:07:07,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:07,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984340306] [2024-10-13 07:07:07,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:07,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:07,781 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:07,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:07,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984340306] [2024-10-13 07:07:07,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984340306] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:07,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580553735] [2024-10-13 07:07:07,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 07:07:07,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:07,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:07,783 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:07,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-13 07:07:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:07,917 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 07:07:07,918 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:07,990 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:07:07,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2024-10-13 07:07:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:08,037 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:08,153 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-13 07:07:08,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-10-13 07:07:08,179 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:08,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580553735] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:08,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:08,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-10-13 07:07:08,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978550397] [2024-10-13 07:07:08,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:08,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 07:07:08,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:08,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 07:07:08,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-10-13 07:07:08,181 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:08,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 131 transitions, 1253 flow. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:08,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:08,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:08,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:08,501 INFO L124 PetriNetUnfolderBase]: 333/616 cut-off events. [2024-10-13 07:07:08,502 INFO L125 PetriNetUnfolderBase]: For 5179/5179 co-relation queries the response was YES. [2024-10-13 07:07:08,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3865 conditions, 616 events. 333/616 cut-off events. For 5179/5179 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2592 event pairs, 115 based on Foata normal form. 4/620 useless extension candidates. Maximal degree in co-relation 3791. Up to 505 conditions per place. [2024-10-13 07:07:08,508 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 121 selfloop transitions, 29 changer transitions 0/151 dead transitions. [2024-10-13 07:07:08,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 151 transitions, 1759 flow [2024-10-13 07:07:08,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 07:07:08,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-13 07:07:08,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 81 transitions. [2024-10-13 07:07:08,510 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3347107438016529 [2024-10-13 07:07:08,510 INFO L175 Difference]: Start difference. First operand has 142 places, 131 transitions, 1253 flow. Second operand 11 states and 81 transitions. [2024-10-13 07:07:08,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 151 transitions, 1759 flow [2024-10-13 07:07:08,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 151 transitions, 1681 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-10-13 07:07:08,524 INFO L231 Difference]: Finished difference. Result has 146 places, 134 transitions, 1307 flow [2024-10-13 07:07:08,524 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1188, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1307, PETRI_PLACES=146, PETRI_TRANSITIONS=134} [2024-10-13 07:07:08,525 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 124 predicate places. [2024-10-13 07:07:08,525 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 134 transitions, 1307 flow [2024-10-13 07:07:08,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:08,525 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:08,526 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:08,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-10-13 07:07:08,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:08,727 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:08,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:08,727 INFO L85 PathProgramCache]: Analyzing trace with hash 913368344, now seen corresponding path program 20 times [2024-10-13 07:07:08,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:08,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738635410] [2024-10-13 07:07:08,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:08,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:08,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:09,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:09,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738635410] [2024-10-13 07:07:09,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738635410] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:09,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817205680] [2024-10-13 07:07:09,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:07:09,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:09,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:09,168 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:09,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-13 07:07:09,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:07:09,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:07:09,308 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-13 07:07:09,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:09,469 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:07:09,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-10-13 07:07:09,506 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:09,507 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:09,638 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-13 07:07:09,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-10-13 07:07:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:09,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817205680] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:09,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:09,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-10-13 07:07:09,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561391094] [2024-10-13 07:07:09,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:09,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 07:07:09,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:09,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 07:07:09,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2024-10-13 07:07:09,709 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:09,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 134 transitions, 1307 flow. Second operand has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 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 07:07:09,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:09,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:09,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:10,209 INFO L124 PetriNetUnfolderBase]: 347/652 cut-off events. [2024-10-13 07:07:10,209 INFO L125 PetriNetUnfolderBase]: For 5669/5669 co-relation queries the response was YES. [2024-10-13 07:07:10,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4093 conditions, 652 events. 347/652 cut-off events. For 5669/5669 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2843 event pairs, 117 based on Foata normal form. 4/656 useless extension candidates. Maximal degree in co-relation 4018. Up to 509 conditions per place. [2024-10-13 07:07:10,215 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 122 selfloop transitions, 31 changer transitions 0/154 dead transitions. [2024-10-13 07:07:10,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 154 transitions, 1779 flow [2024-10-13 07:07:10,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 07:07:10,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-13 07:07:10,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 74 transitions. [2024-10-13 07:07:10,217 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37373737373737376 [2024-10-13 07:07:10,217 INFO L175 Difference]: Start difference. First operand has 146 places, 134 transitions, 1307 flow. Second operand 9 states and 74 transitions. [2024-10-13 07:07:10,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 154 transitions, 1779 flow [2024-10-13 07:07:10,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 154 transitions, 1712 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-10-13 07:07:10,234 INFO L231 Difference]: Finished difference. Result has 147 places, 135 transitions, 1334 flow [2024-10-13 07:07:10,235 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1240, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1334, PETRI_PLACES=147, PETRI_TRANSITIONS=135} [2024-10-13 07:07:10,235 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 125 predicate places. [2024-10-13 07:07:10,235 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 135 transitions, 1334 flow [2024-10-13 07:07:10,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 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 07:07:10,235 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:10,236 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:10,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-10-13 07:07:10,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-13 07:07:10,437 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:10,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:10,437 INFO L85 PathProgramCache]: Analyzing trace with hash 2114018255, now seen corresponding path program 21 times [2024-10-13 07:07:10,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:10,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992928273] [2024-10-13 07:07:10,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:10,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:10,876 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:10,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:10,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992928273] [2024-10-13 07:07:10,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992928273] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:10,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434980393] [2024-10-13 07:07:10,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:07:10,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:10,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:10,879 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:10,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-13 07:07:11,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 07:07:11,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:07:11,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-13 07:07:11,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:11,211 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:07:11,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-10-13 07:07:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:11,255 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:11,381 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-13 07:07:11,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-10-13 07:07:11,459 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:11,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434980393] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:11,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:11,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 21 [2024-10-13 07:07:11,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569751522] [2024-10-13 07:07:11,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:11,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 07:07:11,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:11,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 07:07:11,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2024-10-13 07:07:11,460 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:11,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 135 transitions, 1334 flow. Second operand has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 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 07:07:11,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:11,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:11,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:11,823 INFO L124 PetriNetUnfolderBase]: 356/674 cut-off events. [2024-10-13 07:07:11,824 INFO L125 PetriNetUnfolderBase]: For 6177/6177 co-relation queries the response was YES. [2024-10-13 07:07:11,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4238 conditions, 674 events. 356/674 cut-off events. For 6177/6177 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2984 event pairs, 131 based on Foata normal form. 5/679 useless extension candidates. Maximal degree in co-relation 4162. Up to 564 conditions per place. [2024-10-13 07:07:11,828 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 124 selfloop transitions, 26 changer transitions 0/151 dead transitions. [2024-10-13 07:07:11,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 151 transitions, 1769 flow [2024-10-13 07:07:11,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 07:07:11,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-13 07:07:11,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 70 transitions. [2024-10-13 07:07:11,829 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35353535353535354 [2024-10-13 07:07:11,829 INFO L175 Difference]: Start difference. First operand has 147 places, 135 transitions, 1334 flow. Second operand 9 states and 70 transitions. [2024-10-13 07:07:11,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 151 transitions, 1769 flow [2024-10-13 07:07:11,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 151 transitions, 1699 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-10-13 07:07:11,844 INFO L231 Difference]: Finished difference. Result has 149 places, 136 transitions, 1342 flow [2024-10-13 07:07:11,844 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1342, PETRI_PLACES=149, PETRI_TRANSITIONS=136} [2024-10-13 07:07:11,845 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 127 predicate places. [2024-10-13 07:07:11,845 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 136 transitions, 1342 flow [2024-10-13 07:07:11,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 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 07:07:11,845 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:11,845 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:11,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-10-13 07:07:12,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:12,050 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:12,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:12,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1749142699, now seen corresponding path program 22 times [2024-10-13 07:07:12,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:12,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492122020] [2024-10-13 07:07:12,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:12,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:12,468 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:12,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:12,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492122020] [2024-10-13 07:07:12,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492122020] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:12,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952925596] [2024-10-13 07:07:12,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:07:12,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:12,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:12,470 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:12,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-13 07:07:12,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:07:12,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:07:12,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-13 07:07:12,608 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:12,663 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:07:12,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-10-13 07:07:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:12,697 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:12,811 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-13 07:07:12,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-10-13 07:07:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:12,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952925596] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:12,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:12,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-10-13 07:07:12,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062761125] [2024-10-13 07:07:12,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:12,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 07:07:12,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:12,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 07:07:12,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2024-10-13 07:07:12,855 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:12,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 136 transitions, 1342 flow. Second operand has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 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 07:07:12,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:12,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:12,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:13,349 INFO L124 PetriNetUnfolderBase]: 379/723 cut-off events. [2024-10-13 07:07:13,350 INFO L125 PetriNetUnfolderBase]: For 7357/7357 co-relation queries the response was YES. [2024-10-13 07:07:13,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4592 conditions, 723 events. 379/723 cut-off events. For 7357/7357 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3343 event pairs, 128 based on Foata normal form. 5/728 useless extension candidates. Maximal degree in co-relation 4515. Up to 560 conditions per place. [2024-10-13 07:07:13,355 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 137 selfloop transitions, 37 changer transitions 0/175 dead transitions. [2024-10-13 07:07:13,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 175 transitions, 2022 flow [2024-10-13 07:07:13,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-13 07:07:13,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-13 07:07:13,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 112 transitions. [2024-10-13 07:07:13,356 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-10-13 07:07:13,356 INFO L175 Difference]: Start difference. First operand has 149 places, 136 transitions, 1342 flow. Second operand 14 states and 112 transitions. [2024-10-13 07:07:13,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 175 transitions, 2022 flow [2024-10-13 07:07:13,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 175 transitions, 1960 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-10-13 07:07:13,374 INFO L231 Difference]: Finished difference. Result has 158 places, 141 transitions, 1473 flow [2024-10-13 07:07:13,374 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1473, PETRI_PLACES=158, PETRI_TRANSITIONS=141} [2024-10-13 07:07:13,374 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 136 predicate places. [2024-10-13 07:07:13,375 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 141 transitions, 1473 flow [2024-10-13 07:07:13,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 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 07:07:13,375 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:13,375 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:13,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-10-13 07:07:13,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-10-13 07:07:13,576 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:13,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:13,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1676819895, now seen corresponding path program 23 times [2024-10-13 07:07:13,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:13,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157263164] [2024-10-13 07:07:13,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:13,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:14,005 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:14,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:14,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157263164] [2024-10-13 07:07:14,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157263164] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:14,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082156760] [2024-10-13 07:07:14,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:07:14,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:14,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:14,009 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:14,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-10-13 07:07:14,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-13 07:07:14,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:07:14,241 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-13 07:07:14,242 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:14,349 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:14,349 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:14,445 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-13 07:07:14,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-10-13 07:07:14,501 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:14,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082156760] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:14,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:14,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-10-13 07:07:14,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743173562] [2024-10-13 07:07:14,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:14,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 07:07:14,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:14,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 07:07:14,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2024-10-13 07:07:14,503 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:14,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 141 transitions, 1473 flow. Second operand has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 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 07:07:14,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:14,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:14,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:14,806 INFO L124 PetriNetUnfolderBase]: 375/711 cut-off events. [2024-10-13 07:07:14,806 INFO L125 PetriNetUnfolderBase]: For 7570/7570 co-relation queries the response was YES. [2024-10-13 07:07:14,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4661 conditions, 711 events. 375/711 cut-off events. For 7570/7570 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3221 event pairs, 150 based on Foata normal form. 2/713 useless extension candidates. Maximal degree in co-relation 4581. Up to 623 conditions per place. [2024-10-13 07:07:14,811 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 124 selfloop transitions, 23 changer transitions 4/152 dead transitions. [2024-10-13 07:07:14,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 152 transitions, 1867 flow [2024-10-13 07:07:14,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 07:07:14,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-13 07:07:14,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 63 transitions. [2024-10-13 07:07:14,812 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-10-13 07:07:14,812 INFO L175 Difference]: Start difference. First operand has 158 places, 141 transitions, 1473 flow. Second operand 9 states and 63 transitions. [2024-10-13 07:07:14,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 152 transitions, 1867 flow [2024-10-13 07:07:14,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 152 transitions, 1756 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-10-13 07:07:14,833 INFO L231 Difference]: Finished difference. Result has 160 places, 141 transitions, 1416 flow [2024-10-13 07:07:14,834 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1363, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1416, PETRI_PLACES=160, PETRI_TRANSITIONS=141} [2024-10-13 07:07:14,834 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 138 predicate places. [2024-10-13 07:07:14,834 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 141 transitions, 1416 flow [2024-10-13 07:07:14,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 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 07:07:14,834 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:14,834 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:14,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-10-13 07:07:15,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:15,038 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:15,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:15,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1769472311, now seen corresponding path program 24 times [2024-10-13 07:07:15,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:15,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960552747] [2024-10-13 07:07:15,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:15,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:15,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:15,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:15,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960552747] [2024-10-13 07:07:15,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960552747] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:15,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927488110] [2024-10-13 07:07:15,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:07:15,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:15,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:15,455 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:15,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-10-13 07:07:15,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-13 07:07:15,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:07:15,617 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-13 07:07:15,618 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:15,696 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:07:15,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-10-13 07:07:15,731 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:15,732 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:15,836 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-13 07:07:15,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-10-13 07:07:15,875 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:15,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927488110] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:15,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:15,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-10-13 07:07:15,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75611293] [2024-10-13 07:07:15,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:15,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 07:07:15,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:15,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 07:07:15,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-10-13 07:07:15,876 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:15,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 141 transitions, 1416 flow. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:15,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:15,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:15,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:16,213 INFO L124 PetriNetUnfolderBase]: 367/691 cut-off events. [2024-10-13 07:07:16,213 INFO L125 PetriNetUnfolderBase]: For 6826/6826 co-relation queries the response was YES. [2024-10-13 07:07:16,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4421 conditions, 691 events. 367/691 cut-off events. For 6826/6826 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3075 event pairs, 125 based on Foata normal form. 4/695 useless extension candidates. Maximal degree in co-relation 4337. Up to 546 conditions per place. [2024-10-13 07:07:16,219 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 127 selfloop transitions, 33 changer transitions 2/163 dead transitions. [2024-10-13 07:07:16,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 163 transitions, 1874 flow [2024-10-13 07:07:16,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 07:07:16,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-13 07:07:16,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 94 transitions. [2024-10-13 07:07:16,220 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3560606060606061 [2024-10-13 07:07:16,220 INFO L175 Difference]: Start difference. First operand has 160 places, 141 transitions, 1416 flow. Second operand 12 states and 94 transitions. [2024-10-13 07:07:16,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 163 transitions, 1874 flow [2024-10-13 07:07:16,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 163 transitions, 1826 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-10-13 07:07:16,238 INFO L231 Difference]: Finished difference. Result has 161 places, 138 transitions, 1403 flow [2024-10-13 07:07:16,238 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1349, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1403, PETRI_PLACES=161, PETRI_TRANSITIONS=138} [2024-10-13 07:07:16,239 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 139 predicate places. [2024-10-13 07:07:16,239 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 138 transitions, 1403 flow [2024-10-13 07:07:16,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:16,239 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:16,239 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:16,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-10-13 07:07:16,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:16,443 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:16,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:16,444 INFO L85 PathProgramCache]: Analyzing trace with hash 978001524, now seen corresponding path program 25 times [2024-10-13 07:07:16,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:16,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073354720] [2024-10-13 07:07:16,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:16,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:16,836 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:16,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:16,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073354720] [2024-10-13 07:07:16,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073354720] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:16,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640324756] [2024-10-13 07:07:16,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 07:07:16,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:16,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:16,839 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:16,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-10-13 07:07:16,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:16,991 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 07:07:16,992 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:17,077 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:17,077 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:17,186 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-13 07:07:17,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-10-13 07:07:17,248 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:17,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640324756] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:17,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:17,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-10-13 07:07:17,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678812612] [2024-10-13 07:07:17,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:17,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 07:07:17,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:17,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 07:07:17,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2024-10-13 07:07:17,250 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:17,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 138 transitions, 1403 flow. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 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 07:07:17,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:17,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:17,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:17,551 INFO L124 PetriNetUnfolderBase]: 363/685 cut-off events. [2024-10-13 07:07:17,552 INFO L125 PetriNetUnfolderBase]: For 6787/6787 co-relation queries the response was YES. [2024-10-13 07:07:17,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4407 conditions, 685 events. 363/685 cut-off events. For 6787/6787 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3037 event pairs, 144 based on Foata normal form. 3/688 useless extension candidates. Maximal degree in co-relation 4324. Up to 592 conditions per place. [2024-10-13 07:07:17,556 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 117 selfloop transitions, 24 changer transitions 6/148 dead transitions. [2024-10-13 07:07:17,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 148 transitions, 1737 flow [2024-10-13 07:07:17,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 07:07:17,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-13 07:07:17,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 65 transitions. [2024-10-13 07:07:17,559 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3282828282828283 [2024-10-13 07:07:17,559 INFO L175 Difference]: Start difference. First operand has 161 places, 138 transitions, 1403 flow. Second operand 9 states and 65 transitions. [2024-10-13 07:07:17,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 148 transitions, 1737 flow [2024-10-13 07:07:17,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 148 transitions, 1672 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-10-13 07:07:17,576 INFO L231 Difference]: Finished difference. Result has 157 places, 135 transitions, 1347 flow [2024-10-13 07:07:17,577 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1323, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1347, PETRI_PLACES=157, PETRI_TRANSITIONS=135} [2024-10-13 07:07:17,577 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 135 predicate places. [2024-10-13 07:07:17,577 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 135 transitions, 1347 flow [2024-10-13 07:07:17,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 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 07:07:17,579 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:17,580 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:17,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-10-13 07:07:17,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:17,780 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:17,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:17,780 INFO L85 PathProgramCache]: Analyzing trace with hash -475944113, now seen corresponding path program 26 times [2024-10-13 07:07:17,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:17,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659240419] [2024-10-13 07:07:17,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:17,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:17,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:18,148 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:18,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:18,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659240419] [2024-10-13 07:07:18,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659240419] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:18,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46359718] [2024-10-13 07:07:18,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:07:18,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:18,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:18,150 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:18,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-10-13 07:07:18,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:07:18,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:07:18,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-13 07:07:18,305 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:18,464 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-13 07:07:18,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-10-13 07:07:18,468 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:18,468 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:18,574 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-13 07:07:18,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-10-13 07:07:18,623 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:18,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46359718] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:18,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:18,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-10-13 07:07:18,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409535424] [2024-10-13 07:07:18,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:18,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 07:07:18,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:18,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 07:07:18,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-10-13 07:07:18,624 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:18,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 135 transitions, 1347 flow. Second operand has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:18,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:18,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:18,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:19,017 INFO L124 PetriNetUnfolderBase]: 362/675 cut-off events. [2024-10-13 07:07:19,018 INFO L125 PetriNetUnfolderBase]: For 6524/6524 co-relation queries the response was YES. [2024-10-13 07:07:19,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4320 conditions, 675 events. 362/675 cut-off events. For 6524/6524 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2957 event pairs, 133 based on Foata normal form. 5/680 useless extension candidates. Maximal degree in co-relation 4238. Up to 564 conditions per place. [2024-10-13 07:07:19,025 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 122 selfloop transitions, 27 changer transitions 0/150 dead transitions. [2024-10-13 07:07:19,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 150 transitions, 1756 flow [2024-10-13 07:07:19,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 07:07:19,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-13 07:07:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 69 transitions. [2024-10-13 07:07:19,026 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3484848484848485 [2024-10-13 07:07:19,026 INFO L175 Difference]: Start difference. First operand has 157 places, 135 transitions, 1347 flow. Second operand 9 states and 69 transitions. [2024-10-13 07:07:19,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 150 transitions, 1756 flow [2024-10-13 07:07:19,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 150 transitions, 1689 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-10-13 07:07:19,050 INFO L231 Difference]: Finished difference. Result has 154 places, 135 transitions, 1339 flow [2024-10-13 07:07:19,050 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1339, PETRI_PLACES=154, PETRI_TRANSITIONS=135} [2024-10-13 07:07:19,050 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 132 predicate places. [2024-10-13 07:07:19,051 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 135 transitions, 1339 flow [2024-10-13 07:07:19,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:19,051 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:19,051 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:19,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-10-13 07:07:19,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-10-13 07:07:19,252 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:19,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:19,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1603340206, now seen corresponding path program 27 times [2024-10-13 07:07:19,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:19,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876185879] [2024-10-13 07:07:19,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:19,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:19,731 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:19,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:19,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876185879] [2024-10-13 07:07:19,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876185879] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:19,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345847891] [2024-10-13 07:07:19,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:07:19,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:19,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:19,734 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:19,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-10-13 07:07:19,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-13 07:07:19,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:07:19,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-13 07:07:19,903 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:20,063 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:07:20,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-10-13 07:07:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:20,101 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:20,204 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-13 07:07:20,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-10-13 07:07:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:20,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345847891] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:20,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:20,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-10-13 07:07:20,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271202004] [2024-10-13 07:07:20,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:20,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 07:07:20,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:20,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 07:07:20,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2024-10-13 07:07:20,305 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:20,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 135 transitions, 1339 flow. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:20,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:20,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:20,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:20,841 INFO L124 PetriNetUnfolderBase]: 351/646 cut-off events. [2024-10-13 07:07:20,841 INFO L125 PetriNetUnfolderBase]: For 6398/6398 co-relation queries the response was YES. [2024-10-13 07:07:20,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4160 conditions, 646 events. 351/646 cut-off events. For 6398/6398 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2752 event pairs, 123 based on Foata normal form. 3/649 useless extension candidates. Maximal degree in co-relation 4078. Up to 550 conditions per place. [2024-10-13 07:07:20,846 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 119 selfloop transitions, 27 changer transitions 3/150 dead transitions. [2024-10-13 07:07:20,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 150 transitions, 1740 flow [2024-10-13 07:07:20,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 07:07:20,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-13 07:07:20,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 79 transitions. [2024-10-13 07:07:20,847 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32644628099173556 [2024-10-13 07:07:20,847 INFO L175 Difference]: Start difference. First operand has 154 places, 135 transitions, 1339 flow. Second operand 11 states and 79 transitions. [2024-10-13 07:07:20,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 150 transitions, 1740 flow [2024-10-13 07:07:20,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 150 transitions, 1682 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-10-13 07:07:20,865 INFO L231 Difference]: Finished difference. Result has 156 places, 133 transitions, 1310 flow [2024-10-13 07:07:20,865 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1268, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1310, PETRI_PLACES=156, PETRI_TRANSITIONS=133} [2024-10-13 07:07:20,866 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 134 predicate places. [2024-10-13 07:07:20,866 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 133 transitions, 1310 flow [2024-10-13 07:07:20,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:20,866 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:20,866 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:20,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-10-13 07:07:21,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-10-13 07:07:21,071 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:21,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:21,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1792814846, now seen corresponding path program 28 times [2024-10-13 07:07:21,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:21,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177602258] [2024-10-13 07:07:21,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:21,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:21,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:21,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177602258] [2024-10-13 07:07:21,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177602258] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:21,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933141731] [2024-10-13 07:07:21,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:07:21,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:21,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:21,478 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:21,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-10-13 07:07:21,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:07:21,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:07:21,641 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-13 07:07:21,642 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:21,752 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-10-13 07:07:21,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-10-13 07:07:21,774 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:21,774 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:22,026 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-13 07:07:22,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-10-13 07:07:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:22,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933141731] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:22,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:22,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 22 [2024-10-13 07:07:22,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456627052] [2024-10-13 07:07:22,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:22,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-13 07:07:22,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:22,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-13 07:07:22,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2024-10-13 07:07:22,065 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:22,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 133 transitions, 1310 flow. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 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 07:07:22,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:22,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:22,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:22,602 INFO L124 PetriNetUnfolderBase]: 375/685 cut-off events. [2024-10-13 07:07:22,602 INFO L125 PetriNetUnfolderBase]: For 7502/7502 co-relation queries the response was YES. [2024-10-13 07:07:22,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4536 conditions, 685 events. 375/685 cut-off events. For 7502/7502 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2964 event pairs, 87 based on Foata normal form. 10/695 useless extension candidates. Maximal degree in co-relation 4454. Up to 546 conditions per place. [2024-10-13 07:07:22,607 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 123 selfloop transitions, 35 changer transitions 0/159 dead transitions. [2024-10-13 07:07:22,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 159 transitions, 1915 flow [2024-10-13 07:07:22,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-13 07:07:22,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-13 07:07:22,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 99 transitions. [2024-10-13 07:07:22,608 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32142857142857145 [2024-10-13 07:07:22,608 INFO L175 Difference]: Start difference. First operand has 156 places, 133 transitions, 1310 flow. Second operand 14 states and 99 transitions. [2024-10-13 07:07:22,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 159 transitions, 1915 flow [2024-10-13 07:07:22,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 159 transitions, 1844 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-10-13 07:07:22,626 INFO L231 Difference]: Finished difference. Result has 162 places, 141 transitions, 1503 flow [2024-10-13 07:07:22,627 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1503, PETRI_PLACES=162, PETRI_TRANSITIONS=141} [2024-10-13 07:07:22,627 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 140 predicate places. [2024-10-13 07:07:22,627 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 141 transitions, 1503 flow [2024-10-13 07:07:22,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 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 07:07:22,627 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:22,628 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:22,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-10-13 07:07:22,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:22,828 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:22,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:22,829 INFO L85 PathProgramCache]: Analyzing trace with hash -562267998, now seen corresponding path program 29 times [2024-10-13 07:07:22,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:22,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930454843] [2024-10-13 07:07:22,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:22,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:23,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:23,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930454843] [2024-10-13 07:07:23,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930454843] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:23,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130138726] [2024-10-13 07:07:23,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:07:23,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:23,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:23,201 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:23,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-10-13 07:07:23,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-13 07:07:23,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:07:23,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-13 07:07:23,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:23,547 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:23,680 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-10-13 07:07:23,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-10-13 07:07:23,702 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:23,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130138726] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:23,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:23,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-10-13 07:07:23,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297130754] [2024-10-13 07:07:23,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:23,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 07:07:23,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:23,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 07:07:23,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-10-13 07:07:23,704 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:23,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 141 transitions, 1503 flow. Second operand has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 states have internal predecessors, (112), 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 07:07:23,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:23,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:23,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:24,181 INFO L124 PetriNetUnfolderBase]: 387/705 cut-off events. [2024-10-13 07:07:24,181 INFO L125 PetriNetUnfolderBase]: For 8638/8638 co-relation queries the response was YES. [2024-10-13 07:07:24,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4911 conditions, 705 events. 387/705 cut-off events. For 8638/8638 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3058 event pairs, 26 based on Foata normal form. 4/709 useless extension candidates. Maximal degree in co-relation 4826. Up to 289 conditions per place. [2024-10-13 07:07:24,186 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 108 selfloop transitions, 61 changer transitions 1/171 dead transitions. [2024-10-13 07:07:24,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 171 transitions, 2205 flow [2024-10-13 07:07:24,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-13 07:07:24,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-13 07:07:24,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 98 transitions. [2024-10-13 07:07:24,188 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34265734265734266 [2024-10-13 07:07:24,188 INFO L175 Difference]: Start difference. First operand has 162 places, 141 transitions, 1503 flow. Second operand 13 states and 98 transitions. [2024-10-13 07:07:24,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 171 transitions, 2205 flow [2024-10-13 07:07:24,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 171 transitions, 2055 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-10-13 07:07:24,209 INFO L231 Difference]: Finished difference. Result has 167 places, 143 transitions, 1529 flow [2024-10-13 07:07:24,209 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1355, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1529, PETRI_PLACES=167, PETRI_TRANSITIONS=143} [2024-10-13 07:07:24,209 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 145 predicate places. [2024-10-13 07:07:24,209 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 143 transitions, 1529 flow [2024-10-13 07:07:24,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 states have internal predecessors, (112), 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 07:07:24,210 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:24,210 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:24,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-10-13 07:07:24,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-10-13 07:07:24,410 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:24,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:24,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1468901763, now seen corresponding path program 30 times [2024-10-13 07:07:24,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:24,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569425446] [2024-10-13 07:07:24,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:24,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:24,869 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:24,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:24,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569425446] [2024-10-13 07:07:24,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569425446] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:24,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104286376] [2024-10-13 07:07:24,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:07:24,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:24,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:24,871 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:24,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-10-13 07:07:25,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-13 07:07:25,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:07:25,037 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-13 07:07:25,038 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:25,154 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:07:25,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-10-13 07:07:25,191 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:25,191 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:25,326 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-13 07:07:25,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-10-13 07:07:25,404 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:25,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104286376] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:25,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:25,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-10-13 07:07:25,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619928831] [2024-10-13 07:07:25,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:25,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 07:07:25,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:25,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 07:07:25,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-10-13 07:07:25,406 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:25,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 143 transitions, 1529 flow. Second operand has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:25,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:25,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:25,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:25,897 INFO L124 PetriNetUnfolderBase]: 396/727 cut-off events. [2024-10-13 07:07:25,897 INFO L125 PetriNetUnfolderBase]: For 9258/9258 co-relation queries the response was YES. [2024-10-13 07:07:25,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5079 conditions, 727 events. 396/727 cut-off events. For 9258/9258 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3233 event pairs, 131 based on Foata normal form. 5/732 useless extension candidates. Maximal degree in co-relation 4994. Up to 592 conditions per place. [2024-10-13 07:07:25,903 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 129 selfloop transitions, 30 changer transitions 3/163 dead transitions. [2024-10-13 07:07:25,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 163 transitions, 2033 flow [2024-10-13 07:07:25,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 07:07:25,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-13 07:07:25,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 79 transitions. [2024-10-13 07:07:25,904 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35909090909090907 [2024-10-13 07:07:25,904 INFO L175 Difference]: Start difference. First operand has 167 places, 143 transitions, 1529 flow. Second operand 10 states and 79 transitions. [2024-10-13 07:07:25,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 163 transitions, 2033 flow [2024-10-13 07:07:25,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 163 transitions, 1916 flow, removed 17 selfloop flow, removed 11 redundant places. [2024-10-13 07:07:25,927 INFO L231 Difference]: Finished difference. Result has 166 places, 144 transitions, 1503 flow [2024-10-13 07:07:25,927 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1503, PETRI_PLACES=166, PETRI_TRANSITIONS=144} [2024-10-13 07:07:25,927 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 144 predicate places. [2024-10-13 07:07:25,927 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 144 transitions, 1503 flow [2024-10-13 07:07:25,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:25,928 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:25,928 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:25,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-10-13 07:07:26,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-10-13 07:07:26,131 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:26,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:26,132 INFO L85 PathProgramCache]: Analyzing trace with hash 753889306, now seen corresponding path program 31 times [2024-10-13 07:07:26,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:26,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511375069] [2024-10-13 07:07:26,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:26,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:26,538 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:26,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:26,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511375069] [2024-10-13 07:07:26,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511375069] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:26,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071092239] [2024-10-13 07:07:26,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 07:07:26,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:26,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:26,543 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:26,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-10-13 07:07:26,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:26,708 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 07:07:26,709 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:26,784 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-10-13 07:07:26,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-10-13 07:07:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:26,787 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:26,905 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-10-13 07:07:26,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-10-13 07:07:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:26,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071092239] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:26,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:26,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-10-13 07:07:26,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933260755] [2024-10-13 07:07:26,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:26,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 07:07:26,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:26,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 07:07:26,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-10-13 07:07:26,915 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:26,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 144 transitions, 1503 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 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 07:07:26,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:26,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:26,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:27,306 INFO L124 PetriNetUnfolderBase]: 414/757 cut-off events. [2024-10-13 07:07:27,306 INFO L125 PetriNetUnfolderBase]: For 9408/9408 co-relation queries the response was YES. [2024-10-13 07:07:27,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5295 conditions, 757 events. 414/757 cut-off events. For 9408/9408 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3389 event pairs, 31 based on Foata normal form. 4/761 useless extension candidates. Maximal degree in co-relation 5211. Up to 322 conditions per place. [2024-10-13 07:07:27,313 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 112 selfloop transitions, 60 changer transitions 1/174 dead transitions. [2024-10-13 07:07:27,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 174 transitions, 2219 flow [2024-10-13 07:07:27,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 07:07:27,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-13 07:07:27,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 92 transitions. [2024-10-13 07:07:27,314 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3484848484848485 [2024-10-13 07:07:27,314 INFO L175 Difference]: Start difference. First operand has 166 places, 144 transitions, 1503 flow. Second operand 12 states and 92 transitions. [2024-10-13 07:07:27,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 174 transitions, 2219 flow [2024-10-13 07:07:27,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 174 transitions, 2148 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-10-13 07:07:27,339 INFO L231 Difference]: Finished difference. Result has 171 places, 148 transitions, 1641 flow [2024-10-13 07:07:27,339 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1432, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1641, PETRI_PLACES=171, PETRI_TRANSITIONS=148} [2024-10-13 07:07:27,339 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 149 predicate places. [2024-10-13 07:07:27,340 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 148 transitions, 1641 flow [2024-10-13 07:07:27,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 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 07:07:27,340 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:27,340 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:27,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-10-13 07:07:27,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-10-13 07:07:27,543 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:27,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:27,543 INFO L85 PathProgramCache]: Analyzing trace with hash 679894773, now seen corresponding path program 32 times [2024-10-13 07:07:27,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:27,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473279394] [2024-10-13 07:07:27,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:27,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:28,098 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:28,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:28,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473279394] [2024-10-13 07:07:28,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473279394] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:28,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592322412] [2024-10-13 07:07:28,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:07:28,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:28,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:28,100 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:28,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-10-13 07:07:28,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:07:28,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:07:28,277 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-13 07:07:28,278 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:28,441 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:07:28,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-10-13 07:07:28,476 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:28,476 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:28,617 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-10-13 07:07:28,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-10-13 07:07:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:28,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592322412] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:28,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:28,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-10-13 07:07:28,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721282476] [2024-10-13 07:07:28,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:28,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 07:07:28,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:28,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 07:07:28,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2024-10-13 07:07:28,654 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:28,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 148 transitions, 1641 flow. Second operand has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:28,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:28,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:28,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:29,450 INFO L124 PetriNetUnfolderBase]: 423/779 cut-off events. [2024-10-13 07:07:29,450 INFO L125 PetriNetUnfolderBase]: For 11104/11104 co-relation queries the response was YES. [2024-10-13 07:07:29,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5610 conditions, 779 events. 423/779 cut-off events. For 11104/11104 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3599 event pairs, 84 based on Foata normal form. 5/784 useless extension candidates. Maximal degree in co-relation 5524. Up to 419 conditions per place. [2024-10-13 07:07:29,456 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 124 selfloop transitions, 60 changer transitions 5/190 dead transitions. [2024-10-13 07:07:29,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 190 transitions, 2443 flow [2024-10-13 07:07:29,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-13 07:07:29,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-13 07:07:29,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 114 transitions. [2024-10-13 07:07:29,457 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37012987012987014 [2024-10-13 07:07:29,458 INFO L175 Difference]: Start difference. First operand has 171 places, 148 transitions, 1641 flow. Second operand 14 states and 114 transitions. [2024-10-13 07:07:29,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 190 transitions, 2443 flow [2024-10-13 07:07:29,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 190 transitions, 2334 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-10-13 07:07:29,485 INFO L231 Difference]: Finished difference. Result has 177 places, 149 transitions, 1680 flow [2024-10-13 07:07:29,485 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1533, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1680, PETRI_PLACES=177, PETRI_TRANSITIONS=149} [2024-10-13 07:07:29,486 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 155 predicate places. [2024-10-13 07:07:29,486 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 149 transitions, 1680 flow [2024-10-13 07:07:29,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:29,486 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:29,486 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:29,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-10-13 07:07:29,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:29,690 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:29,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:29,691 INFO L85 PathProgramCache]: Analyzing trace with hash -730554144, now seen corresponding path program 33 times [2024-10-13 07:07:29,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:29,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437226044] [2024-10-13 07:07:29,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:29,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:30,386 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 07:07:30,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:30,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437226044] [2024-10-13 07:07:30,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437226044] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:30,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027655405] [2024-10-13 07:07:30,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:07:30,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:30,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:30,392 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:30,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-10-13 07:07:30,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 07:07:30,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:07:30,561 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-13 07:07:30,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:30,668 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:07:30,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-10-13 07:07:30,703 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:30,703 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:30,817 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-13 07:07:30,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-10-13 07:07:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:30,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027655405] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:30,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:30,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 7] total 24 [2024-10-13 07:07:30,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166163188] [2024-10-13 07:07:30,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:30,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-13 07:07:30,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:30,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-13 07:07:30,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2024-10-13 07:07:30,886 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:30,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 149 transitions, 1680 flow. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 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 07:07:30,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:30,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:30,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:31,397 INFO L124 PetriNetUnfolderBase]: 437/815 cut-off events. [2024-10-13 07:07:31,397 INFO L125 PetriNetUnfolderBase]: For 11336/11336 co-relation queries the response was YES. [2024-10-13 07:07:31,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5925 conditions, 815 events. 437/815 cut-off events. For 11336/11336 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3833 event pairs, 151 based on Foata normal form. 4/819 useless extension candidates. Maximal degree in co-relation 5839. Up to 665 conditions per place. [2024-10-13 07:07:31,407 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 122 selfloop transitions, 44 changer transitions 1/168 dead transitions. [2024-10-13 07:07:31,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 168 transitions, 2190 flow [2024-10-13 07:07:31,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-13 07:07:31,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-13 07:07:31,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 97 transitions. [2024-10-13 07:07:31,409 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.31493506493506496 [2024-10-13 07:07:31,409 INFO L175 Difference]: Start difference. First operand has 177 places, 149 transitions, 1680 flow. Second operand 14 states and 97 transitions. [2024-10-13 07:07:31,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 168 transitions, 2190 flow [2024-10-13 07:07:31,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 168 transitions, 2050 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-10-13 07:07:31,432 INFO L231 Difference]: Finished difference. Result has 180 places, 150 transitions, 1669 flow [2024-10-13 07:07:31,432 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1542, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1669, PETRI_PLACES=180, PETRI_TRANSITIONS=150} [2024-10-13 07:07:31,436 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 158 predicate places. [2024-10-13 07:07:31,436 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 150 transitions, 1669 flow [2024-10-13 07:07:31,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 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 07:07:31,436 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:31,436 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:31,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-10-13 07:07:31,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:31,640 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:31,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:31,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1035678370, now seen corresponding path program 34 times [2024-10-13 07:07:31,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:31,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452899412] [2024-10-13 07:07:31,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:31,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:31,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:32,140 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:32,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:32,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452899412] [2024-10-13 07:07:32,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452899412] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:32,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797625936] [2024-10-13 07:07:32,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:07:32,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:32,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:32,143 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:32,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-10-13 07:07:32,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:07:32,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:07:32,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-13 07:07:32,312 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:32,371 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:07:32,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-10-13 07:07:32,403 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:32,404 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:32,522 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-10-13 07:07:32,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-10-13 07:07:32,538 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:32,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797625936] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:32,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:32,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-10-13 07:07:32,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196090029] [2024-10-13 07:07:32,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:32,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 07:07:32,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:32,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 07:07:32,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2024-10-13 07:07:32,539 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:32,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 150 transitions, 1669 flow. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:32,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:32,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:32,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:33,393 INFO L124 PetriNetUnfolderBase]: 469/881 cut-off events. [2024-10-13 07:07:33,393 INFO L125 PetriNetUnfolderBase]: For 11611/11611 co-relation queries the response was YES. [2024-10-13 07:07:33,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6291 conditions, 881 events. 469/881 cut-off events. For 11611/11611 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4271 event pairs, 23 based on Foata normal form. 4/885 useless extension candidates. Maximal degree in co-relation 6203. Up to 362 conditions per place. [2024-10-13 07:07:33,401 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 122 selfloop transitions, 69 changer transitions 3/195 dead transitions. [2024-10-13 07:07:33,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 195 transitions, 2583 flow [2024-10-13 07:07:33,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-13 07:07:33,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-13 07:07:33,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 117 transitions. [2024-10-13 07:07:33,402 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35454545454545455 [2024-10-13 07:07:33,402 INFO L175 Difference]: Start difference. First operand has 180 places, 150 transitions, 1669 flow. Second operand 15 states and 117 transitions. [2024-10-13 07:07:33,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 195 transitions, 2583 flow [2024-10-13 07:07:33,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 195 transitions, 2478 flow, removed 10 selfloop flow, removed 12 redundant places. [2024-10-13 07:07:33,434 INFO L231 Difference]: Finished difference. Result has 185 places, 156 transitions, 1862 flow [2024-10-13 07:07:33,435 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1564, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1862, PETRI_PLACES=185, PETRI_TRANSITIONS=156} [2024-10-13 07:07:33,436 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 163 predicate places. [2024-10-13 07:07:33,436 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 156 transitions, 1862 flow [2024-10-13 07:07:33,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:33,436 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:33,436 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:33,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-10-13 07:07:33,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-10-13 07:07:33,640 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:33,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:33,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1193609280, now seen corresponding path program 35 times [2024-10-13 07:07:33,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:33,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373958539] [2024-10-13 07:07:33,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:33,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:33,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:34,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:34,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373958539] [2024-10-13 07:07:34,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373958539] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:34,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072775556] [2024-10-13 07:07:34,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:07:34,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:34,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:34,073 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:34,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-10-13 07:07:34,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-13 07:07:34,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:07:34,272 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-13 07:07:34,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:34,344 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:07:34,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-10-13 07:07:34,376 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:34,376 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:34,486 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-13 07:07:34,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-10-13 07:07:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:34,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072775556] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:34,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:34,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-10-13 07:07:34,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109542040] [2024-10-13 07:07:34,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:34,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 07:07:34,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:34,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 07:07:34,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2024-10-13 07:07:34,569 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:34,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 156 transitions, 1862 flow. Second operand has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 states have internal predecessors, (112), 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 07:07:34,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:34,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:34,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:35,162 INFO L124 PetriNetUnfolderBase]: 466/879 cut-off events. [2024-10-13 07:07:35,163 INFO L125 PetriNetUnfolderBase]: For 12643/12643 co-relation queries the response was YES. [2024-10-13 07:07:35,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6463 conditions, 879 events. 466/879 cut-off events. For 12643/12643 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4284 event pairs, 151 based on Foata normal form. 4/883 useless extension candidates. Maximal degree in co-relation 6373. Up to 683 conditions per place. [2024-10-13 07:07:35,170 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 144 selfloop transitions, 38 changer transitions 3/186 dead transitions. [2024-10-13 07:07:35,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 186 transitions, 2555 flow [2024-10-13 07:07:35,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-13 07:07:35,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-13 07:07:35,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 98 transitions. [2024-10-13 07:07:35,171 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34265734265734266 [2024-10-13 07:07:35,171 INFO L175 Difference]: Start difference. First operand has 185 places, 156 transitions, 1862 flow. Second operand 13 states and 98 transitions. [2024-10-13 07:07:35,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 186 transitions, 2555 flow [2024-10-13 07:07:35,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 186 transitions, 2381 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-10-13 07:07:35,204 INFO L231 Difference]: Finished difference. Result has 190 places, 158 transitions, 1841 flow [2024-10-13 07:07:35,205 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1676, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1841, PETRI_PLACES=190, PETRI_TRANSITIONS=158} [2024-10-13 07:07:35,205 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 168 predicate places. [2024-10-13 07:07:35,205 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 158 transitions, 1841 flow [2024-10-13 07:07:35,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 states have internal predecessors, (112), 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 07:07:35,206 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:35,206 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:35,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-10-13 07:07:35,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-10-13 07:07:35,409 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:35,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:35,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1966596357, now seen corresponding path program 36 times [2024-10-13 07:07:35,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:35,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666930366] [2024-10-13 07:07:35,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:35,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:35,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:35,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:35,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666930366] [2024-10-13 07:07:35,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666930366] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:35,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154656656] [2024-10-13 07:07:35,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:07:35,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:35,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:35,828 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:35,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-10-13 07:07:35,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-13 07:07:35,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:07:35,998 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-13 07:07:35,999 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:36,107 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:07:36,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-10-13 07:07:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:36,140 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:36,253 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-13 07:07:36,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-10-13 07:07:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:36,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154656656] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:36,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:36,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-10-13 07:07:36,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258204054] [2024-10-13 07:07:36,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:36,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 07:07:36,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:36,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 07:07:36,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2024-10-13 07:07:36,324 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:36,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 158 transitions, 1841 flow. Second operand has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:36,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:36,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:36,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:36,682 INFO L124 PetriNetUnfolderBase]: 460/860 cut-off events. [2024-10-13 07:07:36,682 INFO L125 PetriNetUnfolderBase]: For 10644/10644 co-relation queries the response was YES. [2024-10-13 07:07:36,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6175 conditions, 860 events. 460/860 cut-off events. For 10644/10644 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4120 event pairs, 167 based on Foata normal form. 2/862 useless extension candidates. Maximal degree in co-relation 6083. Up to 732 conditions per place. [2024-10-13 07:07:36,693 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 139 selfloop transitions, 28 changer transitions 5/173 dead transitions. [2024-10-13 07:07:36,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 173 transitions, 2297 flow [2024-10-13 07:07:36,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 07:07:36,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-13 07:07:36,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 76 transitions. [2024-10-13 07:07:36,694 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34545454545454546 [2024-10-13 07:07:36,694 INFO L175 Difference]: Start difference. First operand has 190 places, 158 transitions, 1841 flow. Second operand 10 states and 76 transitions. [2024-10-13 07:07:36,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 173 transitions, 2297 flow [2024-10-13 07:07:36,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 173 transitions, 2122 flow, removed 51 selfloop flow, removed 12 redundant places. [2024-10-13 07:07:36,723 INFO L231 Difference]: Finished difference. Result has 187 places, 156 transitions, 1727 flow [2024-10-13 07:07:36,723 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1682, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1727, PETRI_PLACES=187, PETRI_TRANSITIONS=156} [2024-10-13 07:07:36,724 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 165 predicate places. [2024-10-13 07:07:36,724 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 156 transitions, 1727 flow [2024-10-13 07:07:36,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:36,724 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:36,724 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:36,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-10-13 07:07:36,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-10-13 07:07:36,929 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:36,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:36,929 INFO L85 PathProgramCache]: Analyzing trace with hash -2057078813, now seen corresponding path program 37 times [2024-10-13 07:07:36,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:36,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144828037] [2024-10-13 07:07:36,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:36,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:36,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:37,282 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:37,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:37,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144828037] [2024-10-13 07:07:37,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144828037] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:37,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090144228] [2024-10-13 07:07:37,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 07:07:37,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:37,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:37,284 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:37,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-10-13 07:07:37,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:37,459 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 07:07:37,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:37,520 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-10-13 07:07:37,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-10-13 07:07:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:37,526 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:37,625 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-13 07:07:37,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-10-13 07:07:37,674 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:37,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090144228] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:37,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:37,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-10-13 07:07:37,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786912077] [2024-10-13 07:07:37,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:37,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 07:07:37,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:37,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 07:07:37,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-10-13 07:07:37,675 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:37,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 156 transitions, 1727 flow. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:37,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:37,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:37,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:37,996 INFO L124 PetriNetUnfolderBase]: 462/861 cut-off events. [2024-10-13 07:07:37,996 INFO L125 PetriNetUnfolderBase]: For 10193/10193 co-relation queries the response was YES. [2024-10-13 07:07:38,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6057 conditions, 861 events. 462/861 cut-off events. For 10193/10193 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4113 event pairs, 175 based on Foata normal form. 5/866 useless extension candidates. Maximal degree in co-relation 5970. Up to 751 conditions per place. [2024-10-13 07:07:38,004 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 146 selfloop transitions, 24 changer transitions 0/171 dead transitions. [2024-10-13 07:07:38,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 171 transitions, 2197 flow [2024-10-13 07:07:38,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 07:07:38,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-13 07:07:38,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 68 transitions. [2024-10-13 07:07:38,005 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3434343434343434 [2024-10-13 07:07:38,005 INFO L175 Difference]: Start difference. First operand has 187 places, 156 transitions, 1727 flow. Second operand 9 states and 68 transitions. [2024-10-13 07:07:38,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 171 transitions, 2197 flow [2024-10-13 07:07:38,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 171 transitions, 2125 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-10-13 07:07:38,032 INFO L231 Difference]: Finished difference. Result has 184 places, 157 transitions, 1736 flow [2024-10-13 07:07:38,034 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1655, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1736, PETRI_PLACES=184, PETRI_TRANSITIONS=157} [2024-10-13 07:07:38,034 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 162 predicate places. [2024-10-13 07:07:38,035 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 157 transitions, 1736 flow [2024-10-13 07:07:38,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:38,035 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:38,035 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:38,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-10-13 07:07:38,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-10-13 07:07:38,236 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:38,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:38,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1624769889, now seen corresponding path program 38 times [2024-10-13 07:07:38,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:38,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754622739] [2024-10-13 07:07:38,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:38,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:38,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:38,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754622739] [2024-10-13 07:07:38,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754622739] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:38,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590691750] [2024-10-13 07:07:38,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:07:38,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:38,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:38,749 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:38,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-10-13 07:07:38,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:07:38,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:07:38,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-13 07:07:38,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:39,258 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:39,497 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-10-13 07:07:39,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-10-13 07:07:39,559 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:39,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590691750] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:39,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:39,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 21 [2024-10-13 07:07:39,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461030409] [2024-10-13 07:07:39,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:39,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 07:07:39,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:39,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 07:07:39,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-10-13 07:07:39,561 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:39,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 157 transitions, 1736 flow. Second operand has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:39,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:39,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:39,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:40,018 INFO L124 PetriNetUnfolderBase]: 463/870 cut-off events. [2024-10-13 07:07:40,018 INFO L125 PetriNetUnfolderBase]: For 9684/9684 co-relation queries the response was YES. [2024-10-13 07:07:40,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6089 conditions, 870 events. 463/870 cut-off events. For 9684/9684 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4235 event pairs, 107 based on Foata normal form. 2/872 useless extension candidates. Maximal degree in co-relation 6002. Up to 513 conditions per place. [2024-10-13 07:07:40,025 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 117 selfloop transitions, 53 changer transitions 9/180 dead transitions. [2024-10-13 07:07:40,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 180 transitions, 2278 flow [2024-10-13 07:07:40,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 07:07:40,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-13 07:07:40,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 72 transitions. [2024-10-13 07:07:40,026 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-10-13 07:07:40,026 INFO L175 Difference]: Start difference. First operand has 184 places, 157 transitions, 1736 flow. Second operand 9 states and 72 transitions. [2024-10-13 07:07:40,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 180 transitions, 2278 flow [2024-10-13 07:07:40,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 180 transitions, 2197 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-10-13 07:07:40,052 INFO L231 Difference]: Finished difference. Result has 186 places, 156 transitions, 1753 flow [2024-10-13 07:07:40,052 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1655, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1753, PETRI_PLACES=186, PETRI_TRANSITIONS=156} [2024-10-13 07:07:40,053 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 164 predicate places. [2024-10-13 07:07:40,053 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 156 transitions, 1753 flow [2024-10-13 07:07:40,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:40,053 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:40,053 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:40,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-10-13 07:07:40,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:40,258 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:40,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:40,258 INFO L85 PathProgramCache]: Analyzing trace with hash -179574403, now seen corresponding path program 39 times [2024-10-13 07:07:40,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:40,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141821575] [2024-10-13 07:07:40,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:40,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:41,011 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:41,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:41,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141821575] [2024-10-13 07:07:41,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141821575] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:41,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019383141] [2024-10-13 07:07:41,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:07:41,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:41,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:41,014 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:41,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-10-13 07:07:41,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-13 07:07:41,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:07:41,198 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-13 07:07:41,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:41,376 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:07:41,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-10-13 07:07:41,412 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:41,413 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:41,550 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-10-13 07:07:41,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-10-13 07:07:41,585 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:41,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019383141] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:41,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:41,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 21 [2024-10-13 07:07:41,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365893419] [2024-10-13 07:07:41,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:41,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 07:07:41,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:41,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 07:07:41,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2024-10-13 07:07:41,587 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:41,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 156 transitions, 1753 flow. Second operand has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:41,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:41,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:41,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:42,413 INFO L124 PetriNetUnfolderBase]: 460/865 cut-off events. [2024-10-13 07:07:42,413 INFO L125 PetriNetUnfolderBase]: For 9854/9854 co-relation queries the response was YES. [2024-10-13 07:07:42,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6129 conditions, 865 events. 460/865 cut-off events. For 9854/9854 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4191 event pairs, 115 based on Foata normal form. 2/867 useless extension candidates. Maximal degree in co-relation 6040. Up to 513 conditions per place. [2024-10-13 07:07:42,421 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 121 selfloop transitions, 58 changer transitions 6/186 dead transitions. [2024-10-13 07:07:42,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 186 transitions, 2308 flow [2024-10-13 07:07:42,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-13 07:07:42,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-13 07:07:42,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 106 transitions. [2024-10-13 07:07:42,422 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3706293706293706 [2024-10-13 07:07:42,422 INFO L175 Difference]: Start difference. First operand has 186 places, 156 transitions, 1753 flow. Second operand 13 states and 106 transitions. [2024-10-13 07:07:42,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 186 transitions, 2308 flow [2024-10-13 07:07:42,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 186 transitions, 2201 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-10-13 07:07:42,451 INFO L231 Difference]: Finished difference. Result has 189 places, 155 transitions, 1753 flow [2024-10-13 07:07:42,451 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1646, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1753, PETRI_PLACES=189, PETRI_TRANSITIONS=155} [2024-10-13 07:07:42,452 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 167 predicate places. [2024-10-13 07:07:42,452 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 155 transitions, 1753 flow [2024-10-13 07:07:42,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:42,452 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:42,452 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:42,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-10-13 07:07:42,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-10-13 07:07:42,656 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:42,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:42,657 INFO L85 PathProgramCache]: Analyzing trace with hash -267511137, now seen corresponding path program 40 times [2024-10-13 07:07:42,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:42,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696152193] [2024-10-13 07:07:42,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:42,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:42,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:43,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:43,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696152193] [2024-10-13 07:07:43,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696152193] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:43,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210481443] [2024-10-13 07:07:43,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:07:43,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:43,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:43,087 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:43,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-10-13 07:07:43,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:07:43,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:07:43,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-13 07:07:43,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:43,312 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:07:43,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-10-13 07:07:43,344 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:43,344 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:43,446 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-13 07:07:43,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-10-13 07:07:43,490 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:43,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210481443] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:43,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:43,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-10-13 07:07:43,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229795203] [2024-10-13 07:07:43,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:43,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 07:07:43,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:43,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 07:07:43,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2024-10-13 07:07:43,491 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:43,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 155 transitions, 1753 flow. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:43,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:43,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:43,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:43,884 INFO L124 PetriNetUnfolderBase]: 451/850 cut-off events. [2024-10-13 07:07:43,884 INFO L125 PetriNetUnfolderBase]: For 9718/9718 co-relation queries the response was YES. [2024-10-13 07:07:43,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6049 conditions, 850 events. 451/850 cut-off events. For 9718/9718 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4128 event pairs, 158 based on Foata normal form. 4/854 useless extension candidates. Maximal degree in co-relation 5962. Up to 701 conditions per place. [2024-10-13 07:07:43,891 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 146 selfloop transitions, 29 changer transitions 6/182 dead transitions. [2024-10-13 07:07:43,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 182 transitions, 2345 flow [2024-10-13 07:07:43,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 07:07:43,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-13 07:07:43,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 94 transitions. [2024-10-13 07:07:43,892 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3560606060606061 [2024-10-13 07:07:43,893 INFO L175 Difference]: Start difference. First operand has 189 places, 155 transitions, 1753 flow. Second operand 12 states and 94 transitions. [2024-10-13 07:07:43,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 182 transitions, 2345 flow [2024-10-13 07:07:43,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 182 transitions, 2223 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-10-13 07:07:43,921 INFO L231 Difference]: Finished difference. Result has 189 places, 155 transitions, 1692 flow [2024-10-13 07:07:43,921 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1631, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1692, PETRI_PLACES=189, PETRI_TRANSITIONS=155} [2024-10-13 07:07:43,921 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 167 predicate places. [2024-10-13 07:07:43,921 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 155 transitions, 1692 flow [2024-10-13 07:07:43,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:43,921 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:43,921 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:43,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-10-13 07:07:44,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-10-13 07:07:44,126 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:44,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:44,126 INFO L85 PathProgramCache]: Analyzing trace with hash -436554240, now seen corresponding path program 41 times [2024-10-13 07:07:44,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:44,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975968959] [2024-10-13 07:07:44,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:44,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:44,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:44,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975968959] [2024-10-13 07:07:44,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975968959] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:44,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119554514] [2024-10-13 07:07:44,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:07:44,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:44,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:44,652 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:44,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-10-13 07:07:44,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-13 07:07:44,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:07:44,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-13 07:07:44,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:44,996 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:07:44,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 45 [2024-10-13 07:07:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:45,034 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:45,180 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-13 07:07:45,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-10-13 07:07:45,226 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:45,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119554514] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:45,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:45,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-10-13 07:07:45,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396540541] [2024-10-13 07:07:45,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:45,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 07:07:45,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:45,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 07:07:45,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2024-10-13 07:07:45,228 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:45,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 155 transitions, 1692 flow. Second operand has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 states have internal predecessors, (112), 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 07:07:45,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:45,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:45,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:45,564 INFO L124 PetriNetUnfolderBase]: 434/807 cut-off events. [2024-10-13 07:07:45,564 INFO L125 PetriNetUnfolderBase]: For 8513/8513 co-relation queries the response was YES. [2024-10-13 07:07:45,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5669 conditions, 807 events. 434/807 cut-off events. For 8513/8513 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 3767 event pairs, 143 based on Foata normal form. 3/810 useless extension candidates. Maximal degree in co-relation 5581. Up to 652 conditions per place. [2024-10-13 07:07:45,572 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 132 selfloop transitions, 33 changer transitions 3/169 dead transitions. [2024-10-13 07:07:45,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 169 transitions, 2149 flow [2024-10-13 07:07:45,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 07:07:45,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-13 07:07:45,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 78 transitions. [2024-10-13 07:07:45,573 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32231404958677684 [2024-10-13 07:07:45,573 INFO L175 Difference]: Start difference. First operand has 189 places, 155 transitions, 1692 flow. Second operand 11 states and 78 transitions. [2024-10-13 07:07:45,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 169 transitions, 2149 flow [2024-10-13 07:07:45,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 169 transitions, 1987 flow, removed 29 selfloop flow, removed 17 redundant places. [2024-10-13 07:07:45,600 INFO L231 Difference]: Finished difference. Result has 180 places, 153 transitions, 1572 flow [2024-10-13 07:07:45,601 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1517, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1572, PETRI_PLACES=180, PETRI_TRANSITIONS=153} [2024-10-13 07:07:45,601 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 158 predicate places. [2024-10-13 07:07:45,601 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 153 transitions, 1572 flow [2024-10-13 07:07:45,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 states have internal predecessors, (112), 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 07:07:45,602 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:45,602 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:45,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-10-13 07:07:45,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-10-13 07:07:45,803 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:45,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:45,803 INFO L85 PathProgramCache]: Analyzing trace with hash 513309799, now seen corresponding path program 42 times [2024-10-13 07:07:45,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:45,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535251011] [2024-10-13 07:07:45,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:45,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:46,190 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:46,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:46,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535251011] [2024-10-13 07:07:46,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535251011] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:46,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239492111] [2024-10-13 07:07:46,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:07:46,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:46,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:46,193 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:46,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-10-13 07:07:46,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-13 07:07:46,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:07:46,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-13 07:07:46,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:46,525 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:07:46,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-10-13 07:07:46,566 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:46,566 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:46,679 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-13 07:07:46,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2024-10-13 07:07:46,726 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:46,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239492111] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:46,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:46,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-10-13 07:07:46,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45367036] [2024-10-13 07:07:46,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:46,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 07:07:46,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:46,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 07:07:46,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-10-13 07:07:46,728 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:46,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 153 transitions, 1572 flow. Second operand has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 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 07:07:46,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:46,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:46,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:47,214 INFO L124 PetriNetUnfolderBase]: 435/802 cut-off events. [2024-10-13 07:07:47,214 INFO L125 PetriNetUnfolderBase]: For 7529/7529 co-relation queries the response was YES. [2024-10-13 07:07:47,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5420 conditions, 802 events. 435/802 cut-off events. For 7529/7529 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3710 event pairs, 148 based on Foata normal form. 5/807 useless extension candidates. Maximal degree in co-relation 5342. Up to 672 conditions per place. [2024-10-13 07:07:47,221 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 142 selfloop transitions, 30 changer transitions 0/173 dead transitions. [2024-10-13 07:07:47,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 173 transitions, 2059 flow [2024-10-13 07:07:47,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 07:07:47,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-13 07:07:47,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 84 transitions. [2024-10-13 07:07:47,224 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34710743801652894 [2024-10-13 07:07:47,224 INFO L175 Difference]: Start difference. First operand has 180 places, 153 transitions, 1572 flow. Second operand 11 states and 84 transitions. [2024-10-13 07:07:47,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 173 transitions, 2059 flow [2024-10-13 07:07:47,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 173 transitions, 1971 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-10-13 07:07:47,242 INFO L231 Difference]: Finished difference. Result has 176 places, 154 transitions, 1573 flow [2024-10-13 07:07:47,243 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1573, PETRI_PLACES=176, PETRI_TRANSITIONS=154} [2024-10-13 07:07:47,243 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 154 predicate places. [2024-10-13 07:07:47,243 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 154 transitions, 1573 flow [2024-10-13 07:07:47,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 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 07:07:47,243 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:47,244 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:47,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-10-13 07:07:47,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:47,447 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:47,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:47,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1053315083, now seen corresponding path program 43 times [2024-10-13 07:07:47,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:47,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783315169] [2024-10-13 07:07:47,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:47,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:48,241 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 07:07:48,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:48,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783315169] [2024-10-13 07:07:48,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783315169] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:48,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988401481] [2024-10-13 07:07:48,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 07:07:48,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:48,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:48,243 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:48,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-10-13 07:07:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:48,436 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-13 07:07:48,438 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:48,523 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:48,634 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-10-13 07:07:48,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 67 [2024-10-13 07:07:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:48,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988401481] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:48,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:48,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 24 [2024-10-13 07:07:48,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733430092] [2024-10-13 07:07:48,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:48,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-13 07:07:48,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:48,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-13 07:07:48,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2024-10-13 07:07:48,653 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:48,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 154 transitions, 1573 flow. Second operand has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 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 07:07:48,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:48,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:48,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:49,377 INFO L124 PetriNetUnfolderBase]: 431/790 cut-off events. [2024-10-13 07:07:49,377 INFO L125 PetriNetUnfolderBase]: For 6983/6983 co-relation queries the response was YES. [2024-10-13 07:07:49,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5313 conditions, 790 events. 431/790 cut-off events. For 6983/6983 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 3631 event pairs, 100 based on Foata normal form. 2/792 useless extension candidates. Maximal degree in co-relation 5236. Up to 491 conditions per place. [2024-10-13 07:07:49,384 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 90 selfloop transitions, 69 changer transitions 7/167 dead transitions. [2024-10-13 07:07:49,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 167 transitions, 1984 flow [2024-10-13 07:07:49,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-13 07:07:49,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-13 07:07:49,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 93 transitions. [2024-10-13 07:07:49,385 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.30194805194805197 [2024-10-13 07:07:49,385 INFO L175 Difference]: Start difference. First operand has 176 places, 154 transitions, 1573 flow. Second operand 14 states and 93 transitions. [2024-10-13 07:07:49,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 167 transitions, 1984 flow [2024-10-13 07:07:49,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 167 transitions, 1918 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-10-13 07:07:49,403 INFO L231 Difference]: Finished difference. Result has 179 places, 151 transitions, 1618 flow [2024-10-13 07:07:49,404 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1497, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1618, PETRI_PLACES=179, PETRI_TRANSITIONS=151} [2024-10-13 07:07:49,404 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 157 predicate places. [2024-10-13 07:07:49,404 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 151 transitions, 1618 flow [2024-10-13 07:07:49,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 24 states have internal predecessors, (115), 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 07:07:49,404 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:49,404 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:49,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-10-13 07:07:49,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:49,605 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:49,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:49,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1458071782, now seen corresponding path program 44 times [2024-10-13 07:07:49,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:49,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290941462] [2024-10-13 07:07:49,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:49,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:49,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:50,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:50,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290941462] [2024-10-13 07:07:50,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290941462] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:50,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776290445] [2024-10-13 07:07:50,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:07:50,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:50,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:50,125 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:50,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-10-13 07:07:50,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:07:50,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:07:50,318 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-13 07:07:50,319 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:50,408 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:07:50,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 41 [2024-10-13 07:07:50,436 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:50,436 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:50,527 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-13 07:07:50,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 88 [2024-10-13 07:07:50,592 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:50,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776290445] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:50,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:50,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-10-13 07:07:50,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744514886] [2024-10-13 07:07:50,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:50,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 07:07:50,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:50,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 07:07:50,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2024-10-13 07:07:50,594 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:50,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 151 transitions, 1618 flow. Second operand has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:50,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:50,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:50,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:50,905 INFO L124 PetriNetUnfolderBase]: 417/750 cut-off events. [2024-10-13 07:07:50,906 INFO L125 PetriNetUnfolderBase]: For 7100/7100 co-relation queries the response was YES. [2024-10-13 07:07:50,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5217 conditions, 750 events. 417/750 cut-off events. For 7100/7100 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 3343 event pairs, 133 based on Foata normal form. 3/753 useless extension candidates. Maximal degree in co-relation 5139. Up to 626 conditions per place. [2024-10-13 07:07:50,912 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 132 selfloop transitions, 29 changer transitions 3/165 dead transitions. [2024-10-13 07:07:50,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 165 transitions, 2064 flow [2024-10-13 07:07:50,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 07:07:50,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-13 07:07:50,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 78 transitions. [2024-10-13 07:07:50,913 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32231404958677684 [2024-10-13 07:07:50,913 INFO L175 Difference]: Start difference. First operand has 179 places, 151 transitions, 1618 flow. Second operand 11 states and 78 transitions. [2024-10-13 07:07:50,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 165 transitions, 2064 flow [2024-10-13 07:07:50,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 165 transitions, 1911 flow, removed 3 selfloop flow, removed 15 redundant places. [2024-10-13 07:07:50,933 INFO L231 Difference]: Finished difference. Result has 169 places, 149 transitions, 1498 flow [2024-10-13 07:07:50,933 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1451, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1498, PETRI_PLACES=169, PETRI_TRANSITIONS=149} [2024-10-13 07:07:50,933 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 147 predicate places. [2024-10-13 07:07:50,933 INFO L471 AbstractCegarLoop]: Abstraction has has 169 places, 149 transitions, 1498 flow [2024-10-13 07:07:50,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:50,933 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:50,933 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:50,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-10-13 07:07:51,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:51,134 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:51,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:51,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1712242296, now seen corresponding path program 45 times [2024-10-13 07:07:51,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:51,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975817620] [2024-10-13 07:07:51,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:51,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:51,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:51,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975817620] [2024-10-13 07:07:51,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975817620] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:51,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557946208] [2024-10-13 07:07:51,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:07:51,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:51,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:51,532 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:51,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-10-13 07:07:51,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 07:07:51,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:07:51,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-13 07:07:51,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:51,837 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:07:51,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2024-10-13 07:07:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:51,886 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:52,030 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-10-13 07:07:52,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2024-10-13 07:07:52,048 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:52,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557946208] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:52,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:52,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-10-13 07:07:52,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299114754] [2024-10-13 07:07:52,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:52,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 07:07:52,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:52,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 07:07:52,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2024-10-13 07:07:52,051 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:52,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 149 transitions, 1498 flow. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:52,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:52,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:52,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:52,464 INFO L124 PetriNetUnfolderBase]: 405/717 cut-off events. [2024-10-13 07:07:52,465 INFO L125 PetriNetUnfolderBase]: For 6190/6190 co-relation queries the response was YES. [2024-10-13 07:07:52,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4936 conditions, 717 events. 405/717 cut-off events. For 6190/6190 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3119 event pairs, 12 based on Foata normal form. 3/720 useless extension candidates. Maximal degree in co-relation 4860. Up to 302 conditions per place. [2024-10-13 07:07:52,470 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 104 selfloop transitions, 68 changer transitions 3/176 dead transitions. [2024-10-13 07:07:52,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 176 transitions, 2119 flow [2024-10-13 07:07:52,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-13 07:07:52,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-13 07:07:52,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 119 transitions. [2024-10-13 07:07:52,471 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-10-13 07:07:52,471 INFO L175 Difference]: Start difference. First operand has 169 places, 149 transitions, 1498 flow. Second operand 17 states and 119 transitions. [2024-10-13 07:07:52,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 176 transitions, 2119 flow [2024-10-13 07:07:52,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 176 transitions, 2020 flow, removed 20 selfloop flow, removed 11 redundant places. [2024-10-13 07:07:52,488 INFO L231 Difference]: Finished difference. Result has 171 places, 145 transitions, 1533 flow [2024-10-13 07:07:52,489 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1406, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1533, PETRI_PLACES=171, PETRI_TRANSITIONS=145} [2024-10-13 07:07:52,489 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 149 predicate places. [2024-10-13 07:07:52,489 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 145 transitions, 1533 flow [2024-10-13 07:07:52,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:07:52,489 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:52,489 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:52,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-10-13 07:07:52,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-10-13 07:07:52,695 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:52,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:52,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1897295989, now seen corresponding path program 46 times [2024-10-13 07:07:52,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:52,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124392464] [2024-10-13 07:07:52,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:52,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:52,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:53,305 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 07:07:53,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:53,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124392464] [2024-10-13 07:07:53,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124392464] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:53,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073377461] [2024-10-13 07:07:53,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:07:53,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:53,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:53,307 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:53,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-10-13 07:07:53,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:07:53,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:07:53,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-13 07:07:53,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:53,604 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:07:53,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2024-10-13 07:07:53,612 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:53,612 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:54,073 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2024-10-13 07:07:54,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 134 treesize of output 83 [2024-10-13 07:07:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:54,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073377461] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:54,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:54,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 30 [2024-10-13 07:07:54,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091507683] [2024-10-13 07:07:54,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:54,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-13 07:07:54,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:54,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-13 07:07:54,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2024-10-13 07:07:54,111 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:54,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 145 transitions, 1533 flow. Second operand has 30 states, 30 states have (on average 4.666666666666667) internal successors, (140), 30 states have internal predecessors, (140), 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 07:07:54,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:54,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:54,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:55,015 INFO L124 PetriNetUnfolderBase]: 534/941 cut-off events. [2024-10-13 07:07:55,015 INFO L125 PetriNetUnfolderBase]: For 7577/7577 co-relation queries the response was YES. [2024-10-13 07:07:55,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6452 conditions, 941 events. 534/941 cut-off events. For 7577/7577 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 4418 event pairs, 42 based on Foata normal form. 1/942 useless extension candidates. Maximal degree in co-relation 6378. Up to 352 conditions per place. [2024-10-13 07:07:55,026 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 115 selfloop transitions, 82 changer transitions 1/199 dead transitions. [2024-10-13 07:07:55,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 199 transitions, 2453 flow [2024-10-13 07:07:55,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-13 07:07:55,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-13 07:07:55,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 134 transitions. [2024-10-13 07:07:55,027 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32057416267942584 [2024-10-13 07:07:55,030 INFO L175 Difference]: Start difference. First operand has 171 places, 145 transitions, 1533 flow. Second operand 19 states and 134 transitions. [2024-10-13 07:07:55,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 199 transitions, 2453 flow [2024-10-13 07:07:55,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 199 transitions, 2243 flow, removed 0 selfloop flow, removed 16 redundant places. [2024-10-13 07:07:55,055 INFO L231 Difference]: Finished difference. Result has 173 places, 156 transitions, 1727 flow [2024-10-13 07:07:55,056 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1360, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1727, PETRI_PLACES=173, PETRI_TRANSITIONS=156} [2024-10-13 07:07:55,056 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 151 predicate places. [2024-10-13 07:07:55,056 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 156 transitions, 1727 flow [2024-10-13 07:07:55,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.666666666666667) internal successors, (140), 30 states have internal predecessors, (140), 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 07:07:55,056 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:55,056 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:55,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-10-13 07:07:55,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-10-13 07:07:55,257 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:55,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:55,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1583830867, now seen corresponding path program 47 times [2024-10-13 07:07:55,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:55,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921300844] [2024-10-13 07:07:55,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:55,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:55,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 07:07:56,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:56,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921300844] [2024-10-13 07:07:56,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921300844] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:56,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051933076] [2024-10-13 07:07:56,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:07:56,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:56,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:56,294 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:56,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-10-13 07:07:56,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-13 07:07:56,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:07:56,559 INFO L255 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-13 07:07:56,560 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:56,690 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:07:56,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2024-10-13 07:07:56,744 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:56,744 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:07:57,020 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-10-13 07:07:57,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 173 treesize of output 107 [2024-10-13 07:07:57,138 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:57,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051933076] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:07:57,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:07:57,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 10] total 36 [2024-10-13 07:07:57,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557256877] [2024-10-13 07:07:57,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:07:57,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-13 07:07:57,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:07:57,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-13 07:07:57,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2024-10-13 07:07:57,140 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:07:57,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 156 transitions, 1727 flow. Second operand has 36 states, 36 states have (on average 4.777777777777778) internal successors, (172), 36 states have internal predecessors, (172), 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 07:07:57,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:07:57,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:07:57,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:07:58,422 INFO L124 PetriNetUnfolderBase]: 608/1079 cut-off events. [2024-10-13 07:07:58,422 INFO L125 PetriNetUnfolderBase]: For 9969/9969 co-relation queries the response was YES. [2024-10-13 07:07:58,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7410 conditions, 1079 events. 608/1079 cut-off events. For 9969/9969 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 5145 event pairs, 54 based on Foata normal form. 5/1084 useless extension candidates. Maximal degree in co-relation 7331. Up to 656 conditions per place. [2024-10-13 07:07:58,431 INFO L140 encePairwiseOnDemand]: 9/22 looper letters, 117 selfloop transitions, 96 changer transitions 6/220 dead transitions. [2024-10-13 07:07:58,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 220 transitions, 2755 flow [2024-10-13 07:07:58,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-13 07:07:58,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-10-13 07:07:58,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 195 transitions. [2024-10-13 07:07:58,432 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3282828282828283 [2024-10-13 07:07:58,432 INFO L175 Difference]: Start difference. First operand has 173 places, 156 transitions, 1727 flow. Second operand 27 states and 195 transitions. [2024-10-13 07:07:58,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 220 transitions, 2755 flow [2024-10-13 07:07:58,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 220 transitions, 2571 flow, removed 25 selfloop flow, removed 12 redundant places. [2024-10-13 07:07:58,461 INFO L231 Difference]: Finished difference. Result has 192 places, 171 transitions, 2115 flow [2024-10-13 07:07:58,461 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1559, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2115, PETRI_PLACES=192, PETRI_TRANSITIONS=171} [2024-10-13 07:07:58,461 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 170 predicate places. [2024-10-13 07:07:58,461 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 171 transitions, 2115 flow [2024-10-13 07:07:58,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.777777777777778) internal successors, (172), 36 states have internal predecessors, (172), 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 07:07:58,462 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:07:58,462 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:07:58,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2024-10-13 07:07:58,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-10-13 07:07:58,666 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:07:58,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:07:58,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1509867643, now seen corresponding path program 48 times [2024-10-13 07:07:58,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:07:58,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992551574] [2024-10-13 07:07:58,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:07:58,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:07:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:07:59,537 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 07:07:59,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:07:59,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992551574] [2024-10-13 07:07:59,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992551574] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:07:59,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927156062] [2024-10-13 07:07:59,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:07:59,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:07:59,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:07:59,539 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:07:59,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-10-13 07:07:59,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-13 07:07:59,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:07:59,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-13 07:07:59,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:07:59,898 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:07:59,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-10-13 07:07:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:07:59,932 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:08:00,265 INFO L349 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2024-10-13 07:08:00,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 181 treesize of output 113 [2024-10-13 07:08:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 07:08:00,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927156062] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:08:00,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:08:00,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 10] total 32 [2024-10-13 07:08:00,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687586280] [2024-10-13 07:08:00,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:08:00,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-13 07:08:00,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:08:00,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-13 07:08:00,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2024-10-13 07:08:00,366 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-13 07:08:00,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 171 transitions, 2115 flow. Second operand has 32 states, 32 states have (on average 4.71875) internal successors, (151), 32 states have internal predecessors, (151), 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 07:08:00,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:08:00,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-13 07:08:00,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand