./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.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 a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 07:10:33,042 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 07:10:33,081 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 07:10:33,085 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 07:10:33,085 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 07:10:33,101 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 07:10:33,102 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 07:10:33,102 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 07:10:33,102 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 07:10:33,103 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 07:10:33,103 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 07:10:33,103 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 07:10:33,104 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 07:10:33,104 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 07:10:33,104 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 07:10:33,105 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 07:10:33,105 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 07:10:33,105 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 07:10:33,106 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 07:10:33,106 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 07:10:33,106 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 07:10:33,107 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 07:10:33,107 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 07:10:33,107 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 07:10:33,108 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 07:10:33,108 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 07:10:33,108 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 07:10:33,109 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 07:10:33,109 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 07:10:33,109 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 07:10:33,109 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 07:10:33,110 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 07:10:33,110 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:10:33,110 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 07:10:33,110 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 07:10:33,111 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 07:10:33,111 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 07:10:33,111 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 07:10:33,111 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 07:10:33,112 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 07:10:33,112 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 07:10:33,114 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 07:10:33,114 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 [2024-10-13 07:10:33,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 07:10:33,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 07:10:33,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 07:10:33,405 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 07:10:33,406 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 07:10:33,407 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2024-10-13 07:10:34,824 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 07:10:35,006 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 07:10:35,007 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2024-10-13 07:10:35,015 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3694a9cc/8a7b991cff1945c485283e039b074e7f/FLAG87c00d7ca [2024-10-13 07:10:35,030 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3694a9cc/8a7b991cff1945c485283e039b074e7f [2024-10-13 07:10:35,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 07:10:35,034 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 07:10:35,039 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 07:10:35,039 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 07:10:35,044 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 07:10:35,044 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:10:35" (1/1) ... [2024-10-13 07:10:35,045 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b5cf868 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:35, skipping insertion in model container [2024-10-13 07:10:35,045 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:10:35" (1/1) ... [2024-10-13 07:10:35,081 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 07:10:35,261 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4226,4239] [2024-10-13 07:10:35,274 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:10:35,283 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 07:10:35,314 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4226,4239] [2024-10-13 07:10:35,320 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:10:35,333 INFO L204 MainTranslator]: Completed translation [2024-10-13 07:10:35,334 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:35 WrapperNode [2024-10-13 07:10:35,334 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 07:10:35,335 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 07:10:35,335 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 07:10:35,335 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 07:10:35,340 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:35" (1/1) ... [2024-10-13 07:10:35,347 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:35" (1/1) ... [2024-10-13 07:10:35,370 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 307 [2024-10-13 07:10:35,370 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 07:10:35,371 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 07:10:35,371 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 07:10:35,371 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 07:10:35,380 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:35" (1/1) ... [2024-10-13 07:10:35,380 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:35" (1/1) ... [2024-10-13 07:10:35,386 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:35" (1/1) ... [2024-10-13 07:10:35,407 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 07:10:35,407 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:35" (1/1) ... [2024-10-13 07:10:35,407 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:35" (1/1) ... [2024-10-13 07:10:35,414 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:35" (1/1) ... [2024-10-13 07:10:35,417 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:35" (1/1) ... [2024-10-13 07:10:35,419 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:35" (1/1) ... [2024-10-13 07:10:35,420 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:35" (1/1) ... [2024-10-13 07:10:35,423 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 07:10:35,423 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 07:10:35,424 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 07:10:35,424 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 07:10:35,424 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:35" (1/1) ... [2024-10-13 07:10:35,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:10:35,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:10:35,454 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 07:10:35,456 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 07:10:35,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 07:10:35,517 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-13 07:10:35,518 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-13 07:10:35,518 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-13 07:10:35,518 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-13 07:10:35,518 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-13 07:10:35,518 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-13 07:10:35,518 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-10-13 07:10:35,518 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-10-13 07:10:35,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 07:10:35,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 07:10:35,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 07:10:35,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 07:10:35,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-13 07:10:35,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-13 07:10:35,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 07:10:35,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 07:10:35,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 07:10:35,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 07:10:35,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 07:10:35,528 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 07:10:35,695 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 07:10:35,697 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 07:10:36,037 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 07:10:36,037 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 07:10:36,386 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 07:10:36,387 INFO L314 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-13 07:10:36,387 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:10:36 BoogieIcfgContainer [2024-10-13 07:10:36,388 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 07:10:36,389 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 07:10:36,391 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 07:10:36,393 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 07:10:36,394 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:10:35" (1/3) ... [2024-10-13 07:10:36,394 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73667f07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:10:36, skipping insertion in model container [2024-10-13 07:10:36,395 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:10:35" (2/3) ... [2024-10-13 07:10:36,395 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73667f07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:10:36, skipping insertion in model container [2024-10-13 07:10:36,396 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:10:36" (3/3) ... [2024-10-13 07:10:36,397 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2024-10-13 07:10:36,412 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 07:10:36,412 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 07:10:36,413 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 07:10:36,469 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-13 07:10:36,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 48 transitions, 124 flow [2024-10-13 07:10:36,535 INFO L124 PetriNetUnfolderBase]: 6/44 cut-off events. [2024-10-13 07:10:36,535 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-13 07:10:36,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 44 events. 6/44 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 68 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2024-10-13 07:10:36,539 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 48 transitions, 124 flow [2024-10-13 07:10:36,543 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 43 transitions, 110 flow [2024-10-13 07:10:36,552 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 07:10:36,559 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;@ef1b5e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 07:10:36,560 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-13 07:10:36,576 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 07:10:36,576 INFO L124 PetriNetUnfolderBase]: 6/42 cut-off events. [2024-10-13 07:10:36,577 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-13 07:10:36,577 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:10:36,577 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] [2024-10-13 07:10:36,578 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 07:10:36,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:10:36,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1822743091, now seen corresponding path program 1 times [2024-10-13 07:10:36,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:10:36,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996025417] [2024-10-13 07:10:36,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:36,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:10:36,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:37,265 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 07:10:37,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:10:37,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996025417] [2024-10-13 07:10:37,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996025417] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:10:37,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:10:37,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 07:10:37,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053250650] [2024-10-13 07:10:37,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:10:37,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 07:10:37,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:10:37,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 07:10:37,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 07:10:37,328 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-10-13 07:10:37,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 110 flow. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:10:37,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:10:37,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-10-13 07:10:37,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:10:37,849 INFO L124 PetriNetUnfolderBase]: 1705/2599 cut-off events. [2024-10-13 07:10:37,849 INFO L125 PetriNetUnfolderBase]: For 264/264 co-relation queries the response was YES. [2024-10-13 07:10:37,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5172 conditions, 2599 events. 1705/2599 cut-off events. For 264/264 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 15312 event pairs, 201 based on Foata normal form. 120/2681 useless extension candidates. Maximal degree in co-relation 4417. Up to 1389 conditions per place. [2024-10-13 07:10:37,874 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 62 selfloop transitions, 7 changer transitions 0/84 dead transitions. [2024-10-13 07:10:37,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 84 transitions, 363 flow [2024-10-13 07:10:37,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 07:10:37,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 07:10:37,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-10-13 07:10:37,886 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6423611111111112 [2024-10-13 07:10:37,887 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 110 flow. Second operand 6 states and 185 transitions. [2024-10-13 07:10:37,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 84 transitions, 363 flow [2024-10-13 07:10:37,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 84 transitions, 325 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-13 07:10:37,902 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 141 flow [2024-10-13 07:10:37,904 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=141, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2024-10-13 07:10:37,907 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2024-10-13 07:10:37,907 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 141 flow [2024-10-13 07:10:37,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:10:37,908 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:10:37,908 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 07:10:37,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 07:10:37,909 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 07:10:37,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:10:37,910 INFO L85 PathProgramCache]: Analyzing trace with hash -101555562, now seen corresponding path program 1 times [2024-10-13 07:10:37,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:10:37,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912805737] [2024-10-13 07:10:37,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:37,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:10:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:38,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:10:38,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:10:38,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912805737] [2024-10-13 07:10:38,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912805737] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:10:38,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:10:38,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:10:38,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248694548] [2024-10-13 07:10:38,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:10:38,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:10:38,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:10:38,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:10:38,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:10:38,166 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2024-10-13 07:10:38,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 141 flow. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 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 07:10:38,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:10:38,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2024-10-13 07:10:38,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:10:38,488 INFO L124 PetriNetUnfolderBase]: 1603/2500 cut-off events. [2024-10-13 07:10:38,488 INFO L125 PetriNetUnfolderBase]: For 2077/2293 co-relation queries the response was YES. [2024-10-13 07:10:38,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6049 conditions, 2500 events. 1603/2500 cut-off events. For 2077/2293 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 15295 event pairs, 1039 based on Foata normal form. 314/2572 useless extension candidates. Maximal degree in co-relation 2728. Up to 1963 conditions per place. [2024-10-13 07:10:38,510 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 28 selfloop transitions, 2 changer transitions 20/69 dead transitions. [2024-10-13 07:10:38,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 69 transitions, 295 flow [2024-10-13 07:10:38,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:10:38,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:10:38,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-10-13 07:10:38,512 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-10-13 07:10:38,512 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 141 flow. Second operand 5 states and 154 transitions. [2024-10-13 07:10:38,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 69 transitions, 295 flow [2024-10-13 07:10:38,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 69 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 07:10:38,516 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 158 flow [2024-10-13 07:10:38,516 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=158, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-10-13 07:10:38,517 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2024-10-13 07:10:38,517 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 158 flow [2024-10-13 07:10:38,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 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 07:10:38,517 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:10:38,518 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:10:38,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 07:10:38,518 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 07:10:38,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:10:38,519 INFO L85 PathProgramCache]: Analyzing trace with hash -319821762, now seen corresponding path program 1 times [2024-10-13 07:10:38,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:10:38,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237574697] [2024-10-13 07:10:38,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:38,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:10:38,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:10:38,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:10:38,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237574697] [2024-10-13 07:10:38,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237574697] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:10:38,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:10:38,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 07:10:38,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95689916] [2024-10-13 07:10:38,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:10:38,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 07:10:38,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:10:38,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 07:10:38,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 07:10:38,849 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-10-13 07:10:38,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 158 flow. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 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 07:10:38,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:10:38,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-10-13 07:10:38,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:10:39,455 INFO L124 PetriNetUnfolderBase]: 2845/4445 cut-off events. [2024-10-13 07:10:39,455 INFO L125 PetriNetUnfolderBase]: For 2608/2608 co-relation queries the response was YES. [2024-10-13 07:10:39,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10730 conditions, 4445 events. 2845/4445 cut-off events. For 2608/2608 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 29032 event pairs, 947 based on Foata normal form. 60/4384 useless extension candidates. Maximal degree in co-relation 10714. Up to 1761 conditions per place. [2024-10-13 07:10:39,485 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 70 selfloop transitions, 11 changer transitions 0/96 dead transitions. [2024-10-13 07:10:39,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 96 transitions, 455 flow [2024-10-13 07:10:39,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 07:10:39,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 07:10:39,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-10-13 07:10:39,487 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6597222222222222 [2024-10-13 07:10:39,487 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 158 flow. Second operand 6 states and 190 transitions. [2024-10-13 07:10:39,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 96 transitions, 455 flow [2024-10-13 07:10:39,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 96 transitions, 441 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-10-13 07:10:39,495 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 233 flow [2024-10-13 07:10:39,495 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=233, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-10-13 07:10:39,495 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 9 predicate places. [2024-10-13 07:10:39,496 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 233 flow [2024-10-13 07:10:39,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 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 07:10:39,496 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:10:39,496 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:10:39,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 07:10:39,497 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 07:10:39,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:10:39,497 INFO L85 PathProgramCache]: Analyzing trace with hash -2046724848, now seen corresponding path program 1 times [2024-10-13 07:10:39,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:10:39,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623938865] [2024-10-13 07:10:39,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:39,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:10:39,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:39,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:10:39,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:10:39,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623938865] [2024-10-13 07:10:39,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623938865] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:10:39,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:10:39,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:10:39,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241053241] [2024-10-13 07:10:39,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:10:39,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 07:10:39,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:10:39,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 07:10:39,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 07:10:39,587 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2024-10-13 07:10:39,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 233 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:10:39,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:10:39,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2024-10-13 07:10:39,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:10:39,912 INFO L124 PetriNetUnfolderBase]: 1887/3148 cut-off events. [2024-10-13 07:10:39,913 INFO L125 PetriNetUnfolderBase]: For 5777/6017 co-relation queries the response was YES. [2024-10-13 07:10:39,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8990 conditions, 3148 events. 1887/3148 cut-off events. For 5777/6017 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 20777 event pairs, 297 based on Foata normal form. 204/3237 useless extension candidates. Maximal degree in co-relation 8968. Up to 2356 conditions per place. [2024-10-13 07:10:39,938 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 42 selfloop transitions, 3 changer transitions 2/69 dead transitions. [2024-10-13 07:10:39,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 69 transitions, 354 flow [2024-10-13 07:10:39,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 07:10:39,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 07:10:39,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2024-10-13 07:10:39,939 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7291666666666666 [2024-10-13 07:10:39,939 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 233 flow. Second operand 3 states and 105 transitions. [2024-10-13 07:10:39,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 69 transitions, 354 flow [2024-10-13 07:10:39,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 69 transitions, 347 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-10-13 07:10:39,946 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 226 flow [2024-10-13 07:10:39,946 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-10-13 07:10:39,946 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2024-10-13 07:10:39,947 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 226 flow [2024-10-13 07:10:39,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:10:39,947 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:10:39,947 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:10:39,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 07:10:39,947 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 07:10:39,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:10:39,948 INFO L85 PathProgramCache]: Analyzing trace with hash -167366565, now seen corresponding path program 1 times [2024-10-13 07:10:39,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:10:39,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862312100] [2024-10-13 07:10:39,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:39,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:10:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:40,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:10:40,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:10:40,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862312100] [2024-10-13 07:10:40,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862312100] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:10:40,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246327272] [2024-10-13 07:10:40,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:40,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:10:40,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:10:40,612 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 07:10:40,613 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 07:10:40,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:40,717 INFO L255 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-13 07:10:40,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:10:40,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-13 07:10:41,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-13 07:10:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:10:41,091 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:10:41,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2024-10-13 07:10:41,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2024-10-13 07:10:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:10:41,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246327272] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:10:41,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:10:41,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-10-13 07:10:41,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140937016] [2024-10-13 07:10:41,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:10:41,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 07:10:41,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:10:41,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 07:10:41,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2024-10-13 07:10:41,800 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2024-10-13 07:10:41,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 226 flow. Second operand has 18 states, 18 states have (on average 24.055555555555557) internal successors, (433), 18 states have internal predecessors, (433), 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 07:10:41,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:10:41,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2024-10-13 07:10:41,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:10:43,766 INFO L124 PetriNetUnfolderBase]: 6564/10730 cut-off events. [2024-10-13 07:10:43,766 INFO L125 PetriNetUnfolderBase]: For 20636/21385 co-relation queries the response was YES. [2024-10-13 07:10:43,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29869 conditions, 10730 events. 6564/10730 cut-off events. For 20636/21385 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 79811 event pairs, 1278 based on Foata normal form. 698/10904 useless extension candidates. Maximal degree in co-relation 14741. Up to 3723 conditions per place. [2024-10-13 07:10:43,856 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 153 selfloop transitions, 41 changer transitions 8/224 dead transitions. [2024-10-13 07:10:43,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 224 transitions, 1275 flow [2024-10-13 07:10:43,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-13 07:10:43,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-13 07:10:43,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 540 transitions. [2024-10-13 07:10:43,859 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6617647058823529 [2024-10-13 07:10:43,859 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 226 flow. Second operand 17 states and 540 transitions. [2024-10-13 07:10:43,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 224 transitions, 1275 flow [2024-10-13 07:10:43,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 224 transitions, 1249 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 07:10:43,879 INFO L231 Difference]: Finished difference. Result has 78 places, 95 transitions, 569 flow [2024-10-13 07:10:43,879 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=569, PETRI_PLACES=78, PETRI_TRANSITIONS=95} [2024-10-13 07:10:43,880 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 28 predicate places. [2024-10-13 07:10:43,880 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 95 transitions, 569 flow [2024-10-13 07:10:43,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 24.055555555555557) internal successors, (433), 18 states have internal predecessors, (433), 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 07:10:43,881 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:10:43,881 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, 1] [2024-10-13 07:10:43,901 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 07:10:44,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:10:44,087 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 07:10:44,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:10:44,087 INFO L85 PathProgramCache]: Analyzing trace with hash -698702159, now seen corresponding path program 1 times [2024-10-13 07:10:44,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:10:44,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853389859] [2024-10-13 07:10:44,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:44,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:10:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:10:44,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:10:44,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853389859] [2024-10-13 07:10:44,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853389859] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:10:44,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068886017] [2024-10-13 07:10:44,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:44,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:10:44,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:10:44,886 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 07:10:44,887 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 07:10:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:44,981 INFO L255 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-13 07:10:45,042 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:10:45,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2024-10-13 07:10:45,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:10:45,151 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:10:45,211 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:10:45,211 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 26 treesize of output 18 [2024-10-13 07:10:45,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:10:45,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068886017] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:10:45,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:10:45,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2024-10-13 07:10:45,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317313038] [2024-10-13 07:10:45,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:10:45,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-13 07:10:45,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:10:45,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-13 07:10:45,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-10-13 07:10:45,338 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2024-10-13 07:10:45,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 95 transitions, 569 flow. Second operand has 15 states, 15 states have (on average 24.266666666666666) internal successors, (364), 15 states have internal predecessors, (364), 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 07:10:45,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:10:45,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2024-10-13 07:10:45,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:10:46,991 INFO L124 PetriNetUnfolderBase]: 7982/13184 cut-off events. [2024-10-13 07:10:46,991 INFO L125 PetriNetUnfolderBase]: For 30893/31795 co-relation queries the response was YES. [2024-10-13 07:10:47,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39744 conditions, 13184 events. 7982/13184 cut-off events. For 30893/31795 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 101825 event pairs, 880 based on Foata normal form. 644/13315 useless extension candidates. Maximal degree in co-relation 28639. Up to 5047 conditions per place. [2024-10-13 07:10:47,103 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 105 selfloop transitions, 54 changer transitions 5/186 dead transitions. [2024-10-13 07:10:47,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 186 transitions, 1295 flow [2024-10-13 07:10:47,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-13 07:10:47,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-13 07:10:47,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 383 transitions. [2024-10-13 07:10:47,105 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6137820512820513 [2024-10-13 07:10:47,105 INFO L175 Difference]: Start difference. First operand has 78 places, 95 transitions, 569 flow. Second operand 13 states and 383 transitions. [2024-10-13 07:10:47,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 186 transitions, 1295 flow [2024-10-13 07:10:47,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 186 transitions, 1277 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-10-13 07:10:47,138 INFO L231 Difference]: Finished difference. Result has 92 places, 119 transitions, 909 flow [2024-10-13 07:10:47,139 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=909, PETRI_PLACES=92, PETRI_TRANSITIONS=119} [2024-10-13 07:10:47,139 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 42 predicate places. [2024-10-13 07:10:47,139 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 119 transitions, 909 flow [2024-10-13 07:10:47,140 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 24.266666666666666) internal successors, (364), 15 states have internal predecessors, (364), 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 07:10:47,140 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:10:47,140 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:10:47,159 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 07:10:47,344 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,SelfDestructingSolverStorable5 [2024-10-13 07:10:47,346 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 07:10:47,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:10:47,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1953496888, now seen corresponding path program 1 times [2024-10-13 07:10:47,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:10:47,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584542969] [2024-10-13 07:10:47,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:47,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:10:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:10:47,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:10:47,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584542969] [2024-10-13 07:10:47,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584542969] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:10:47,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:10:47,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:10:47,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205465774] [2024-10-13 07:10:47,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:10:47,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 07:10:47,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:10:47,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 07:10:47,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 07:10:47,425 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2024-10-13 07:10:47,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 119 transitions, 909 flow. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:10:47,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:10:47,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2024-10-13 07:10:47,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:10:49,723 INFO L124 PetriNetUnfolderBase]: 11081/17896 cut-off events. [2024-10-13 07:10:49,723 INFO L125 PetriNetUnfolderBase]: For 70618/72280 co-relation queries the response was YES. [2024-10-13 07:10:49,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56912 conditions, 17896 events. 11081/17896 cut-off events. For 70618/72280 co-relation queries the response was YES. Maximal size of possible extension queue 923. Compared 137192 event pairs, 2942 based on Foata normal form. 1526/18627 useless extension candidates. Maximal degree in co-relation 44664. Up to 9661 conditions per place. [2024-10-13 07:10:50,024 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 136 selfloop transitions, 8 changer transitions 0/166 dead transitions. [2024-10-13 07:10:50,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 166 transitions, 1648 flow [2024-10-13 07:10:50,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 07:10:50,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 07:10:50,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-10-13 07:10:50,030 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7430555555555556 [2024-10-13 07:10:50,030 INFO L175 Difference]: Start difference. First operand has 92 places, 119 transitions, 909 flow. Second operand 3 states and 107 transitions. [2024-10-13 07:10:50,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 166 transitions, 1648 flow [2024-10-13 07:10:50,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 166 transitions, 1622 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-10-13 07:10:50,118 INFO L231 Difference]: Finished difference. Result has 92 places, 120 transitions, 943 flow [2024-10-13 07:10:50,118 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=943, PETRI_PLACES=92, PETRI_TRANSITIONS=120} [2024-10-13 07:10:50,119 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 42 predicate places. [2024-10-13 07:10:50,122 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 120 transitions, 943 flow [2024-10-13 07:10:50,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:10:50,126 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:10:50,126 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 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] [2024-10-13 07:10:50,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-13 07:10:50,127 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 07:10:50,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:10:50,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1604433398, now seen corresponding path program 2 times [2024-10-13 07:10:50,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:10:50,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315104064] [2024-10-13 07:10:50,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:50,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:10:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:50,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:10:50,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:10:50,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315104064] [2024-10-13 07:10:50,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315104064] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:10:50,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222259003] [2024-10-13 07:10:50,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:10:50,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:10:50,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:10:50,421 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 07:10:50,423 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 07:10:50,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:10:50,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:10:50,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 07:10:50,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:10:50,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:10:50,555 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:10:50,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:10:50,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222259003] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:10:50,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:10:50,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 8 [2024-10-13 07:10:50,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668379639] [2024-10-13 07:10:50,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:10:50,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 07:10:50,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:10:50,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 07:10:50,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-10-13 07:10:50,647 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2024-10-13 07:10:50,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 120 transitions, 943 flow. Second operand has 8 states, 8 states have (on average 25.75) internal successors, (206), 8 states have internal predecessors, (206), 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 07:10:50,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:10:50,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2024-10-13 07:10:50,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:10:54,123 INFO L124 PetriNetUnfolderBase]: 17901/29447 cut-off events. [2024-10-13 07:10:54,123 INFO L125 PetriNetUnfolderBase]: For 98769/100209 co-relation queries the response was YES. [2024-10-13 07:10:54,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96659 conditions, 29447 events. 17901/29447 cut-off events. For 98769/100209 co-relation queries the response was YES. Maximal size of possible extension queue 1432. Compared 249845 event pairs, 3027 based on Foata normal form. 1473/29794 useless extension candidates. Maximal degree in co-relation 90640. Up to 12494 conditions per place. [2024-10-13 07:10:54,380 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 132 selfloop transitions, 42 changer transitions 0/196 dead transitions. [2024-10-13 07:10:54,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 196 transitions, 1827 flow [2024-10-13 07:10:54,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:10:54,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:10:54,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 150 transitions. [2024-10-13 07:10:54,381 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.78125 [2024-10-13 07:10:54,381 INFO L175 Difference]: Start difference. First operand has 92 places, 120 transitions, 943 flow. Second operand 4 states and 150 transitions. [2024-10-13 07:10:54,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 196 transitions, 1827 flow [2024-10-13 07:10:54,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 196 transitions, 1817 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 07:10:54,575 INFO L231 Difference]: Finished difference. Result has 96 places, 143 transitions, 1437 flow [2024-10-13 07:10:54,576 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1437, PETRI_PLACES=96, PETRI_TRANSITIONS=143} [2024-10-13 07:10:54,576 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 46 predicate places. [2024-10-13 07:10:54,576 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 143 transitions, 1437 flow [2024-10-13 07:10:54,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 25.75) internal successors, (206), 8 states have internal predecessors, (206), 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 07:10:54,577 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:10:54,577 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:10:54,589 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 07:10:54,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:10:54,782 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-13 07:10:54,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:10:54,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1108091071, now seen corresponding path program 1 times [2024-10-13 07:10:54,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:10:54,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926473669] [2024-10-13 07:10:54,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:54,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:10:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:10:54,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:10:54,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926473669] [2024-10-13 07:10:54,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926473669] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:10:54,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:10:54,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 07:10:54,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368986226] [2024-10-13 07:10:54,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:10:54,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:10:54,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:10:54,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:10:54,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:10:54,957 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2024-10-13 07:10:54,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 143 transitions, 1437 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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 07:10:54,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:10:54,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2024-10-13 07:10:54,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:10:59,052 INFO L124 PetriNetUnfolderBase]: 19658/32433 cut-off events. [2024-10-13 07:10:59,052 INFO L125 PetriNetUnfolderBase]: For 164616/167212 co-relation queries the response was YES. [2024-10-13 07:10:59,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116145 conditions, 32433 events. 19658/32433 cut-off events. For 164616/167212 co-relation queries the response was YES. Maximal size of possible extension queue 1581. Compared 283937 event pairs, 12933 based on Foata normal form. 2826/33091 useless extension candidates. Maximal degree in co-relation 106782. Up to 18508 conditions per place. [2024-10-13 07:10:59,329 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 145 selfloop transitions, 11 changer transitions 7/185 dead transitions. [2024-10-13 07:10:59,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 185 transitions, 2206 flow [2024-10-13 07:10:59,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 07:10:59,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 07:10:59,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-10-13 07:10:59,330 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-10-13 07:10:59,330 INFO L175 Difference]: Start difference. First operand has 96 places, 143 transitions, 1437 flow. Second operand 4 states and 132 transitions. [2024-10-13 07:10:59,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 185 transitions, 2206 flow [2024-10-13 07:10:59,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 185 transitions, 2192 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-10-13 07:10:59,416 INFO L231 Difference]: Finished difference. Result has 100 places, 139 transitions, 1430 flow [2024-10-13 07:10:59,416 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1385, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1430, PETRI_PLACES=100, PETRI_TRANSITIONS=139} [2024-10-13 07:10:59,417 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 50 predicate places. [2024-10-13 07:10:59,417 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 139 transitions, 1430 flow [2024-10-13 07:10:59,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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 07:10:59,417 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:10:59,417 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:10:59,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-13 07:10:59,418 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-13 07:10:59,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:10:59,418 INFO L85 PathProgramCache]: Analyzing trace with hash -126545709, now seen corresponding path program 1 times [2024-10-13 07:10:59,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:10:59,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425750067] [2024-10-13 07:10:59,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:59,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:10:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:59,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:10:59,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:10:59,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425750067] [2024-10-13 07:10:59,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425750067] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:10:59,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767911386] [2024-10-13 07:10:59,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:10:59,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:10:59,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:10:59,720 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 07:10:59,724 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 07:10:59,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:10:59,813 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-13 07:10:59,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:11:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:11:00,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:11:00,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:11:00,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767911386] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:11:00,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:11:00,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 25 [2024-10-13 07:11:00,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740334254] [2024-10-13 07:11:00,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:11:00,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-13 07:11:00,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:11:00,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-13 07:11:00,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2024-10-13 07:11:00,747 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-10-13 07:11:00,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 139 transitions, 1430 flow. Second operand has 26 states, 26 states have (on average 15.115384615384615) internal successors, (393), 26 states have internal predecessors, (393), 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 07:11:00,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:11:00,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-10-13 07:11:00,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand