./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/parallel-parallel-sum-1.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/parallel-parallel-sum-1.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 b1e99af7c76570461a4b0ac70d664412f250ec04f47fd9ca8c0f85236f1348c6 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 07:09:53,439 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 07:09:53,527 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 07:09:53,533 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 07:09:53,535 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 07:09:53,565 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 07:09:53,566 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 07:09:53,566 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 07:09:53,567 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 07:09:53,570 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 07:09:53,571 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 07:09:53,571 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 07:09:53,572 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 07:09:53,572 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 07:09:53,572 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 07:09:53,572 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 07:09:53,572 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 07:09:53,573 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 07:09:53,573 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 07:09:53,573 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 07:09:53,574 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 07:09:53,574 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 07:09:53,575 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 07:09:53,575 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 07:09:53,575 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 07:09:53,575 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 07:09:53,576 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 07:09:53,576 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 07:09:53,576 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 07:09:53,576 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 07:09:53,577 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 07:09:53,577 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 07:09:53,577 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:09:53,577 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 07:09:53,578 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 07:09:53,578 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 07:09:53,578 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 07:09:53,578 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 07:09:53,579 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 07:09:53,579 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 07:09:53,579 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 07:09:53,581 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 07:09:53,581 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1e99af7c76570461a4b0ac70d664412f250ec04f47fd9ca8c0f85236f1348c6 [2024-10-13 07:09:53,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 07:09:53,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 07:09:53,874 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 07:09:53,875 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 07:09:53,876 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 07:09:53,877 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2024-10-13 07:09:55,365 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 07:09:55,568 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 07:09:55,569 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2024-10-13 07:09:55,576 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37decd21c/45ca306652ad412ab499753d1c26577e/FLAG6d7064ba0 [2024-10-13 07:09:55,588 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37decd21c/45ca306652ad412ab499753d1c26577e [2024-10-13 07:09:55,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 07:09:55,591 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 07:09:55,592 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 07:09:55,592 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 07:09:55,597 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 07:09:55,598 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:09:55" (1/1) ... [2024-10-13 07:09:55,599 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d214a09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:55, skipping insertion in model container [2024-10-13 07:09:55,599 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:09:55" (1/1) ... [2024-10-13 07:09:55,624 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 07:09:55,822 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/parallel-parallel-sum-1.wvr.c[3694,3707] [2024-10-13 07:09:55,834 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:09:55,841 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 07:09:55,863 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/parallel-parallel-sum-1.wvr.c[3694,3707] [2024-10-13 07:09:55,868 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:09:55,882 INFO L204 MainTranslator]: Completed translation [2024-10-13 07:09:55,883 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:55 WrapperNode [2024-10-13 07:09:55,883 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 07:09:55,884 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 07:09:55,884 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 07:09:55,884 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 07:09:55,890 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:55" (1/1) ... [2024-10-13 07:09:55,900 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:55" (1/1) ... [2024-10-13 07:09:55,932 INFO L138 Inliner]: procedures = 26, calls = 48, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 295 [2024-10-13 07:09:55,933 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 07:09:55,937 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 07:09:55,937 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 07:09:55,938 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 07:09:55,949 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:55" (1/1) ... [2024-10-13 07:09:55,949 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:55" (1/1) ... [2024-10-13 07:09:55,953 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:55" (1/1) ... [2024-10-13 07:09:55,981 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-13 07:09:55,982 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:55" (1/1) ... [2024-10-13 07:09:55,982 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:55" (1/1) ... [2024-10-13 07:09:55,997 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:55" (1/1) ... [2024-10-13 07:09:56,005 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:55" (1/1) ... [2024-10-13 07:09:56,007 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:55" (1/1) ... [2024-10-13 07:09:56,009 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:55" (1/1) ... [2024-10-13 07:09:56,012 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 07:09:56,013 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 07:09:56,013 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 07:09:56,014 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 07:09:56,014 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:55" (1/1) ... [2024-10-13 07:09:56,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:09:56,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:09:56,050 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 07:09:56,053 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 07:09:56,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 07:09:56,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 07:09:56,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 07:09:56,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 07:09:56,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 07:09:56,106 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-13 07:09:56,106 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-13 07:09:56,106 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-13 07:09:56,106 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-13 07:09:56,106 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-13 07:09:56,108 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-13 07:09:56,108 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-10-13 07:09:56,108 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-10-13 07:09:56,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 07:09:56,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 07:09:56,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-13 07:09:56,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-13 07:09:56,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 07:09:56,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 07:09:56,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 07:09:56,113 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 07:09:56,258 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 07:09:56,261 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 07:09:56,734 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 07:09:56,734 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 07:09:57,095 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 07:09:57,095 INFO L314 CfgBuilder]: Removed 5 assume(true) statements. [2024-10-13 07:09:57,096 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:09:57 BoogieIcfgContainer [2024-10-13 07:09:57,096 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 07:09:57,098 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 07:09:57,100 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 07:09:57,104 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 07:09:57,104 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:09:55" (1/3) ... [2024-10-13 07:09:57,105 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a27f9e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:09:57, skipping insertion in model container [2024-10-13 07:09:57,105 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:09:55" (2/3) ... [2024-10-13 07:09:57,106 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a27f9e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:09:57, skipping insertion in model container [2024-10-13 07:09:57,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:09:57" (3/3) ... [2024-10-13 07:09:57,107 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-1.wvr.c [2024-10-13 07:09:57,126 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 07:09:57,126 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 07:09:57,127 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 07:09:57,188 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-13 07:09:57,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 54 transitions, 136 flow [2024-10-13 07:09:57,261 INFO L124 PetriNetUnfolderBase]: 9/50 cut-off events. [2024-10-13 07:09:57,262 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-13 07:09:57,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 50 events. 9/50 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 96 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-10-13 07:09:57,268 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 54 transitions, 136 flow [2024-10-13 07:09:57,272 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 49 transitions, 122 flow [2024-10-13 07:09:57,286 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 07:09:57,295 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;@501116e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 07:09:57,296 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-13 07:09:57,312 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 07:09:57,313 INFO L124 PetriNetUnfolderBase]: 9/48 cut-off events. [2024-10-13 07:09:57,313 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-13 07:09:57,313 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:09:57,314 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:09:57,314 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-13 07:09:57,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:09:57,322 INFO L85 PathProgramCache]: Analyzing trace with hash -2135655752, now seen corresponding path program 1 times [2024-10-13 07:09:57,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:09:57,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562050826] [2024-10-13 07:09:57,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:09:57,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:09:57,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:09:57,676 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 07:09:57,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:09:57,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562050826] [2024-10-13 07:09:57,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562050826] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:09:57,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:09:57,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 07:09:57,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616512229] [2024-10-13 07:09:57,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:09:57,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 07:09:57,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:09:57,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 07:09:57,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 07:09:57,730 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 54 [2024-10-13 07:09:57,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 122 flow. Second operand has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 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 07:09:57,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:09:57,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 54 [2024-10-13 07:09:57,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:10:00,128 INFO L124 PetriNetUnfolderBase]: 19797/25801 cut-off events. [2024-10-13 07:10:00,129 INFO L125 PetriNetUnfolderBase]: For 1319/1319 co-relation queries the response was YES. [2024-10-13 07:10:00,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52712 conditions, 25801 events. 19797/25801 cut-off events. For 1319/1319 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 129589 event pairs, 16578 based on Foata normal form. 0/22450 useless extension candidates. Maximal degree in co-relation 49225. Up to 25706 conditions per place. [2024-10-13 07:10:00,335 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 40 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2024-10-13 07:10:00,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 45 transitions, 194 flow [2024-10-13 07:10:00,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 07:10:00,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-13 07:10:00,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 62 transitions. [2024-10-13 07:10:00,349 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-10-13 07:10:00,350 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 122 flow. Second operand 2 states and 62 transitions. [2024-10-13 07:10:00,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 45 transitions, 194 flow [2024-10-13 07:10:00,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 178 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-13 07:10:00,412 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 98 flow [2024-10-13 07:10:00,414 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=98, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2024-10-13 07:10:00,418 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, -7 predicate places. [2024-10-13 07:10:00,418 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 98 flow [2024-10-13 07:10:00,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 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 07:10:00,419 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:10:00,419 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:10:00,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 07:10:00,420 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-13 07:10:00,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:10:00,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1532598492, now seen corresponding path program 1 times [2024-10-13 07:10:00,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:10:00,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534716490] [2024-10-13 07:10:00,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:00,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:10:00,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:00,690 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 07:10:00,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:10:00,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534716490] [2024-10-13 07:10:00,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534716490] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:10:00,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:10:00,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:10:00,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072646907] [2024-10-13 07:10:00,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:10:00,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 07:10:00,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:10:00,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 07:10:00,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 07:10:00,695 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 54 [2024-10-13 07:10:00,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 07:10:00,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:10:00,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 54 [2024-10-13 07:10:00,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:10:03,691 INFO L124 PetriNetUnfolderBase]: 31442/40888 cut-off events. [2024-10-13 07:10:03,691 INFO L125 PetriNetUnfolderBase]: For 564/564 co-relation queries the response was YES. [2024-10-13 07:10:03,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82350 conditions, 40888 events. 31442/40888 cut-off events. For 564/564 co-relation queries the response was YES. Maximal size of possible extension queue 1484. Compared 222608 event pairs, 9215 based on Foata normal form. 1/35408 useless extension candidates. Maximal degree in co-relation 82347. Up to 28277 conditions per place. [2024-10-13 07:10:03,919 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 69 selfloop transitions, 5 changer transitions 1/80 dead transitions. [2024-10-13 07:10:03,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 80 transitions, 325 flow [2024-10-13 07:10:03,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 07:10:03,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 07:10:03,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-10-13 07:10:03,923 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6358024691358025 [2024-10-13 07:10:03,923 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 98 flow. Second operand 3 states and 103 transitions. [2024-10-13 07:10:03,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 80 transitions, 325 flow [2024-10-13 07:10:03,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 80 transitions, 325 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 07:10:03,929 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 131 flow [2024-10-13 07:10:03,933 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2024-10-13 07:10:03,934 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, -4 predicate places. [2024-10-13 07:10:03,934 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 131 flow [2024-10-13 07:10:03,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 07:10:03,935 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:10:03,935 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:10:03,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 07:10:03,936 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-13 07:10:03,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:10:03,938 INFO L85 PathProgramCache]: Analyzing trace with hash 661163044, now seen corresponding path program 1 times [2024-10-13 07:10:03,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:10:03,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370658172] [2024-10-13 07:10:03,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:03,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:10:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:10:04,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:10:04,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370658172] [2024-10-13 07:10:04,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370658172] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:10:04,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:10:04,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:10:04,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431275745] [2024-10-13 07:10:04,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:10:04,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:10:04,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:10:04,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:10:04,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:10:04,203 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 54 [2024-10-13 07:10:04,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 07:10:04,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:10:04,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 54 [2024-10-13 07:10:04,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:10:08,020 INFO L124 PetriNetUnfolderBase]: 47784/63010 cut-off events. [2024-10-13 07:10:08,021 INFO L125 PetriNetUnfolderBase]: For 5397/5397 co-relation queries the response was YES. [2024-10-13 07:10:08,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136710 conditions, 63010 events. 47784/63010 cut-off events. For 5397/5397 co-relation queries the response was YES. Maximal size of possible extension queue 2331. Compared 366422 event pairs, 40360 based on Foata normal form. 2001/55771 useless extension candidates. Maximal degree in co-relation 136705. Up to 40409 conditions per place. [2024-10-13 07:10:08,246 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 43 selfloop transitions, 2 changer transitions 35/85 dead transitions. [2024-10-13 07:10:08,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 85 transitions, 384 flow [2024-10-13 07:10:08,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:10:08,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:10:08,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-10-13 07:10:08,248 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2024-10-13 07:10:08,249 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 131 flow. Second operand 4 states and 113 transitions. [2024-10-13 07:10:08,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 85 transitions, 384 flow [2024-10-13 07:10:08,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 85 transitions, 376 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 07:10:08,254 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 144 flow [2024-10-13 07:10:08,255 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2024-10-13 07:10:08,255 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 0 predicate places. [2024-10-13 07:10:08,256 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 144 flow [2024-10-13 07:10:08,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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 07:10:08,257 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:10:08,257 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:10:08,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 07:10:08,258 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-13 07:10:08,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:10:08,258 INFO L85 PathProgramCache]: Analyzing trace with hash 596459146, now seen corresponding path program 1 times [2024-10-13 07:10:08,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:10:08,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195652566] [2024-10-13 07:10:08,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:08,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:10:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:10:08,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:10:08,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195652566] [2024-10-13 07:10:08,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195652566] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:10:08,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856849959] [2024-10-13 07:10:08,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:08,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:10:08,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:10:08,421 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 07:10:08,423 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 07:10:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:08,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-13 07:10:08,545 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:10:08,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:10:08,671 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:10:08,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:10:08,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856849959] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:10:08,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:10:08,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-10-13 07:10:08,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435163756] [2024-10-13 07:10:08,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:10:08,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-13 07:10:08,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:10:08,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-13 07:10:08,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-13 07:10:08,755 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 54 [2024-10-13 07:10:08,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 144 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 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 07:10:08,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:10:08,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 54 [2024-10-13 07:10:08,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:10:12,352 INFO L124 PetriNetUnfolderBase]: 47144/62039 cut-off events. [2024-10-13 07:10:12,353 INFO L125 PetriNetUnfolderBase]: For 6153/6153 co-relation queries the response was YES. [2024-10-13 07:10:12,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135879 conditions, 62039 events. 47144/62039 cut-off events. For 6153/6153 co-relation queries the response was YES. Maximal size of possible extension queue 2239. Compared 357349 event pairs, 39870 based on Foata normal form. 2026/55109 useless extension candidates. Maximal degree in co-relation 135872. Up to 40408 conditions per place. [2024-10-13 07:10:12,635 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 75 selfloop transitions, 5 changer transitions 2/87 dead transitions. [2024-10-13 07:10:12,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 87 transitions, 412 flow [2024-10-13 07:10:12,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 07:10:12,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 07:10:12,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-10-13 07:10:12,637 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-10-13 07:10:12,637 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 144 flow. Second operand 6 states and 132 transitions. [2024-10-13 07:10:12,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 87 transitions, 412 flow [2024-10-13 07:10:12,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 87 transitions, 404 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-10-13 07:10:12,648 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 179 flow [2024-10-13 07:10:12,648 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=179, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2024-10-13 07:10:12,649 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 6 predicate places. [2024-10-13 07:10:12,649 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 179 flow [2024-10-13 07:10:12,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 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 07:10:12,649 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:10:12,650 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:10:12,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-13 07:10:12,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:10:12,851 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-13 07:10:12,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:10:12,852 INFO L85 PathProgramCache]: Analyzing trace with hash -576347468, now seen corresponding path program 1 times [2024-10-13 07:10:12,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:10:12,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541463707] [2024-10-13 07:10:12,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:12,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:10:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:13,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:10:13,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:10:13,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541463707] [2024-10-13 07:10:13,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541463707] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:10:13,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005408343] [2024-10-13 07:10:13,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:13,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:10:13,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:10:13,050 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 07:10:13,052 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 07:10:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:13,322 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-13 07:10:13,324 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:10:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:10:13,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:10:13,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:10:13,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005408343] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:10:13,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:10:13,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-10-13 07:10:13,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615107263] [2024-10-13 07:10:13,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:10:13,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-13 07:10:13,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:10:13,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-13 07:10:13,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-13 07:10:13,522 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 54 [2024-10-13 07:10:13,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 179 flow. Second operand has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 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 07:10:13,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:10:13,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 54 [2024-10-13 07:10:13,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:10:16,299 INFO L124 PetriNetUnfolderBase]: 35526/46756 cut-off events. [2024-10-13 07:10:16,300 INFO L125 PetriNetUnfolderBase]: For 7614/7614 co-relation queries the response was YES. [2024-10-13 07:10:16,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104724 conditions, 46756 events. 35526/46756 cut-off events. For 7614/7614 co-relation queries the response was YES. Maximal size of possible extension queue 1645. Compared 259932 event pairs, 29704 based on Foata normal form. 611/40737 useless extension candidates. Maximal degree in co-relation 104715. Up to 40408 conditions per place. [2024-10-13 07:10:16,518 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 42 selfloop transitions, 4 changer transitions 29/80 dead transitions. [2024-10-13 07:10:16,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 80 transitions, 387 flow [2024-10-13 07:10:16,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 07:10:16,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 07:10:16,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-10-13 07:10:16,520 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39197530864197533 [2024-10-13 07:10:16,520 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 179 flow. Second operand 6 states and 127 transitions. [2024-10-13 07:10:16,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 80 transitions, 387 flow [2024-10-13 07:10:16,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 80 transitions, 376 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-10-13 07:10:16,534 INFO L231 Difference]: Finished difference. Result has 63 places, 51 transitions, 166 flow [2024-10-13 07:10:16,535 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=63, PETRI_TRANSITIONS=51} [2024-10-13 07:10:16,536 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 10 predicate places. [2024-10-13 07:10:16,536 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 51 transitions, 166 flow [2024-10-13 07:10:16,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 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 07:10:16,536 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:10:16,536 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:10:16,552 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 07:10:16,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:10:16,737 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-13 07:10:16,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:10:16,738 INFO L85 PathProgramCache]: Analyzing trace with hash 17071568, now seen corresponding path program 2 times [2024-10-13 07:10:16,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:10:16,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329424416] [2024-10-13 07:10:16,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:16,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:10:16,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:16,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:10:16,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:10:16,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329424416] [2024-10-13 07:10:16,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329424416] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:10:16,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:10:16,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 07:10:16,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035160285] [2024-10-13 07:10:16,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:10:16,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:10:16,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:10:16,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:10:16,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:10:16,879 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 54 [2024-10-13 07:10:16,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 51 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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 07:10:16,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:10:16,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 54 [2024-10-13 07:10:16,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:10:22,394 INFO L124 PetriNetUnfolderBase]: 70326/91180 cut-off events. [2024-10-13 07:10:22,394 INFO L125 PetriNetUnfolderBase]: For 23861/23861 co-relation queries the response was YES. [2024-10-13 07:10:22,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213117 conditions, 91180 events. 70326/91180 cut-off events. For 23861/23861 co-relation queries the response was YES. Maximal size of possible extension queue 3021. Compared 533174 event pairs, 19769 based on Foata normal form. 1/79427 useless extension candidates. Maximal degree in co-relation 213106. Up to 31389 conditions per place. [2024-10-13 07:10:22,933 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 112 selfloop transitions, 8 changer transitions 1/126 dead transitions. [2024-10-13 07:10:22,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 126 transitions, 632 flow [2024-10-13 07:10:22,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:10:22,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:10:22,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 144 transitions. [2024-10-13 07:10:22,934 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-10-13 07:10:22,935 INFO L175 Difference]: Start difference. First operand has 63 places, 51 transitions, 166 flow. Second operand 4 states and 144 transitions. [2024-10-13 07:10:22,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 126 transitions, 632 flow [2024-10-13 07:10:22,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 126 transitions, 608 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-10-13 07:10:22,951 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 226 flow [2024-10-13 07:10:22,951 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2024-10-13 07:10:22,952 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2024-10-13 07:10:22,952 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 226 flow [2024-10-13 07:10:22,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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 07:10:22,953 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:10:22,953 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:10:22,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-13 07:10:22,953 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-13 07:10:22,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:10:22,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1987005594, now seen corresponding path program 1 times [2024-10-13 07:10:22,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:10:22,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737398020] [2024-10-13 07:10:22,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:22,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:10:22,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:10:23,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:10:23,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737398020] [2024-10-13 07:10:23,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737398020] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:10:23,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749752447] [2024-10-13 07:10:23,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:23,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:10:23,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:10:23,164 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 07:10:23,167 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 07:10:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:23,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 07:10:23,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:10:23,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:10:23,498 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:10:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:10:23,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749752447] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:10:23,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:10:23,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2024-10-13 07:10:23,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300836425] [2024-10-13 07:10:23,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:10:23,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-13 07:10:23,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:10:23,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-13 07:10:23,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-10-13 07:10:23,580 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 54 [2024-10-13 07:10:23,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 226 flow. Second operand has 10 states, 10 states have (on average 18.4) internal successors, (184), 10 states have internal predecessors, (184), 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 07:10:23,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:10:23,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 54 [2024-10-13 07:10:23,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:10:33,317 INFO L124 PetriNetUnfolderBase]: 125786/163023 cut-off events. [2024-10-13 07:10:33,317 INFO L125 PetriNetUnfolderBase]: For 72935/72935 co-relation queries the response was YES. [2024-10-13 07:10:33,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397388 conditions, 163023 events. 125786/163023 cut-off events. For 72935/72935 co-relation queries the response was YES. Maximal size of possible extension queue 4823. Compared 983942 event pairs, 8295 based on Foata normal form. 2/141514 useless extension candidates. Maximal degree in co-relation 397377. Up to 80037 conditions per place. [2024-10-13 07:10:34,501 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 187 selfloop transitions, 22 changer transitions 10/224 dead transitions. [2024-10-13 07:10:34,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 224 transitions, 1169 flow [2024-10-13 07:10:34,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 07:10:34,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-13 07:10:34,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 299 transitions. [2024-10-13 07:10:34,504 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5033670033670034 [2024-10-13 07:10:34,504 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 226 flow. Second operand 11 states and 299 transitions. [2024-10-13 07:10:34,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 224 transitions, 1169 flow [2024-10-13 07:10:35,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 224 transitions, 1109 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-10-13 07:10:35,631 INFO L231 Difference]: Finished difference. Result has 76 places, 75 transitions, 399 flow [2024-10-13 07:10:35,631 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=399, PETRI_PLACES=76, PETRI_TRANSITIONS=75} [2024-10-13 07:10:35,632 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 23 predicate places. [2024-10-13 07:10:35,632 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 75 transitions, 399 flow [2024-10-13 07:10:35,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.4) internal successors, (184), 10 states have internal predecessors, (184), 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 07:10:35,633 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:10:35,633 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:10:35,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 07:10:35,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:10:35,834 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-13 07:10:35,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:10:35,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1279569974, now seen corresponding path program 1 times [2024-10-13 07:10:35,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:10:35,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737801679] [2024-10-13 07:10:35,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:35,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:10:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:37,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:10:37,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:10:37,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737801679] [2024-10-13 07:10:37,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737801679] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:10:37,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852909389] [2024-10-13 07:10:37,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:37,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:10:37,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:10:37,022 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 07:10:37,023 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 07:10:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:37,121 INFO L255 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-13 07:10:37,123 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:10:37,403 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:10:37,406 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 21 treesize of output 15 [2024-10-13 07:10:37,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:10:37,475 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:10:37,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:10:37,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852909389] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:10:37,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:10:37,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 20 [2024-10-13 07:10:37,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806698165] [2024-10-13 07:10:37,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:10:37,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 07:10:37,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:10:37,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 07:10:37,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2024-10-13 07:10:37,644 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 54 [2024-10-13 07:10:37,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 399 flow. Second operand has 20 states, 20 states have (on average 14.4) internal successors, (288), 20 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:10:37,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:10:37,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 54 [2024-10-13 07:10:37,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand