./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/weaver/chl-name-comparator-trans.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 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 08:20:14,958 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 08:20:15,025 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-12 08:20:15,031 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 08:20:15,032 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 08:20:15,069 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 08:20:15,070 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 08:20:15,070 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 08:20:15,071 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 08:20:15,071 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 08:20:15,072 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 08:20:15,080 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 08:20:15,081 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 08:20:15,082 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 08:20:15,082 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 08:20:15,082 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 08:20:15,083 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-12 08:20:15,083 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 08:20:15,083 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 08:20:15,084 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 08:20:15,091 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 08:20:15,092 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-12 08:20:15,092 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 08:20:15,092 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-12 08:20:15,093 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 08:20:15,094 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 08:20:15,094 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-12 08:20:15,095 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 08:20:15,095 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 08:20:15,096 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 08:20:15,096 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 08:20:15,097 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 08:20:15,097 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 08:20:15,098 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 08:20:15,098 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 08:20:15,098 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-12 08:20:15,098 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 08:20:15,099 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 08:20:15,099 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 08:20:15,099 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 08:20:15,099 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 08:20:15,100 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 08:20:15,100 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 [2024-11-12 08:20:15,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 08:20:15,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 08:20:15,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 08:20:15,392 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 08:20:15,392 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 08:20:15,393 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2024-11-12 08:20:16,897 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 08:20:17,089 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 08:20:17,093 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2024-11-12 08:20:17,104 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c44dca1c3/ad3f368f581e4bff9c467d0f2cc68026/FLAG08e8fa31d [2024-11-12 08:20:17,116 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c44dca1c3/ad3f368f581e4bff9c467d0f2cc68026 [2024-11-12 08:20:17,118 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 08:20:17,119 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 08:20:17,120 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 08:20:17,120 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 08:20:17,125 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 08:20:17,126 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 08:20:17" (1/1) ... [2024-11-12 08:20:17,126 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7269dd35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:17, skipping insertion in model container [2024-11-12 08:20:17,127 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 08:20:17" (1/1) ... [2024-11-12 08:20:17,156 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 08:20:17,351 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4827,4840] [2024-11-12 08:20:17,364 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 08:20:17,371 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 08:20:17,403 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4827,4840] [2024-11-12 08:20:17,407 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 08:20:17,422 INFO L204 MainTranslator]: Completed translation [2024-11-12 08:20:17,422 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:17 WrapperNode [2024-11-12 08:20:17,423 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 08:20:17,423 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 08:20:17,424 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 08:20:17,424 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 08:20:17,429 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:17" (1/1) ... [2024-11-12 08:20:17,437 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:17" (1/1) ... [2024-11-12 08:20:17,467 INFO L138 Inliner]: procedures = 25, calls = 29, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 304 [2024-11-12 08:20:17,467 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 08:20:17,468 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 08:20:17,468 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 08:20:17,468 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 08:20:17,482 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:17" (1/1) ... [2024-11-12 08:20:17,482 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:17" (1/1) ... [2024-11-12 08:20:17,487 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:17" (1/1) ... [2024-11-12 08:20:17,517 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-12 08:20:17,518 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:17" (1/1) ... [2024-11-12 08:20:17,518 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:17" (1/1) ... [2024-11-12 08:20:17,528 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:17" (1/1) ... [2024-11-12 08:20:17,537 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:17" (1/1) ... [2024-11-12 08:20:17,539 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:17" (1/1) ... [2024-11-12 08:20:17,541 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:17" (1/1) ... [2024-11-12 08:20:17,544 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 08:20:17,545 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 08:20:17,545 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 08:20:17,545 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 08:20:17,546 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:17" (1/1) ... [2024-11-12 08:20:17,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 08:20:17,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:20:17,581 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-12 08:20:17,584 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 [2024-11-12 08:20:17,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 08:20:17,624 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-12 08:20:17,624 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-12 08:20:17,625 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-12 08:20:17,625 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-12 08:20:17,625 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-12 08:20:17,625 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-12 08:20:17,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 08:20:17,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 08:20:17,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 08:20:17,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 08:20:17,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-12 08:20:17,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 08:20:17,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 08:20:17,627 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 08:20:17,627 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 08:20:17,629 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 08:20:17,751 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 08:20:17,753 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 08:20:18,187 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 08:20:18,187 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 08:20:18,584 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 08:20:18,585 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-12 08:20:18,585 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:20:18 BoogieIcfgContainer [2024-11-12 08:20:18,586 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 08:20:18,587 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 08:20:18,589 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 08:20:18,592 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 08:20:18,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 08:20:17" (1/3) ... [2024-11-12 08:20:18,594 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e29e4c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 08:20:18, skipping insertion in model container [2024-11-12 08:20:18,594 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:17" (2/3) ... [2024-11-12 08:20:18,595 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e29e4c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 08:20:18, skipping insertion in model container [2024-11-12 08:20:18,595 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:20:18" (3/3) ... [2024-11-12 08:20:18,596 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2024-11-12 08:20:18,614 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 08:20:18,615 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-12 08:20:18,615 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 08:20:18,681 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-12 08:20:18,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 36 transitions, 93 flow [2024-11-12 08:20:18,756 INFO L124 PetriNetUnfolderBase]: 7/33 cut-off events. [2024-11-12 08:20:18,757 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-12 08:20:18,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 33 events. 7/33 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 42 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-11-12 08:20:18,760 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 36 transitions, 93 flow [2024-11-12 08:20:18,763 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 32 transitions, 82 flow [2024-11-12 08:20:18,773 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 08:20:18,783 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;@1d69113d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 08:20:18,784 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-12 08:20:18,799 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 08:20:18,800 INFO L124 PetriNetUnfolderBase]: 7/31 cut-off events. [2024-11-12 08:20:18,800 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-12 08:20:18,800 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:18,801 INFO L206 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] [2024-11-12 08:20:18,801 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:20:18,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:18,808 INFO L85 PathProgramCache]: Analyzing trace with hash -447705035, now seen corresponding path program 1 times [2024-11-12 08:20:18,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:18,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280499237] [2024-11-12 08:20:18,818 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:18,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:18,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:19,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:20:19,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:19,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280499237] [2024-11-12 08:20:19,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280499237] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:20:19,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:20:19,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 08:20:19,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936976610] [2024-11-12 08:20:19,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:20:19,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-12 08:20:19,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:19,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-12 08:20:19,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-12 08:20:19,169 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-12 08:20:19,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 82 flow. Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:19,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:19,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-12 08:20:19,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:19,520 INFO L124 PetriNetUnfolderBase]: 792/1137 cut-off events. [2024-11-12 08:20:19,521 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2024-11-12 08:20:19,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2371 conditions, 1137 events. 792/1137 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3706 event pairs, 608 based on Foata normal form. 0/953 useless extension candidates. Maximal degree in co-relation 2150. Up to 1137 conditions per place. [2024-11-12 08:20:19,534 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 28 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2024-11-12 08:20:19,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 132 flow [2024-11-12 08:20:19,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-12 08:20:19,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-12 08:20:19,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 39 transitions. [2024-11-12 08:20:19,548 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-11-12 08:20:19,550 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 82 flow. Second operand 2 states and 39 transitions. [2024-11-12 08:20:19,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 132 flow [2024-11-12 08:20:19,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 120 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-12 08:20:19,558 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 64 flow [2024-11-12 08:20:19,561 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=64, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2024-11-12 08:20:19,565 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, -5 predicate places. [2024-11-12 08:20:19,566 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 64 flow [2024-11-12 08:20:19,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:19,567 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:19,567 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:20:19,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 08:20:19,568 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:20:19,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:19,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1234612696, now seen corresponding path program 1 times [2024-11-12 08:20:19,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:19,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448911084] [2024-11-12 08:20:19,571 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:19,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:19,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:19,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:20:19,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:19,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448911084] [2024-11-12 08:20:19,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448911084] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:20:19,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:20:19,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 08:20:19,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091450521] [2024-11-12 08:20:19,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:20:19,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 08:20:19,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:19,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 08:20:19,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 08:20:19,849 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-12 08:20:19,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:19,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:19,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-12 08:20:19,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:20,066 INFO L124 PetriNetUnfolderBase]: 792/1138 cut-off events. [2024-11-12 08:20:20,067 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-12 08:20:20,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2309 conditions, 1138 events. 792/1138 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3700 event pairs, 608 based on Foata normal form. 0/954 useless extension candidates. Maximal degree in co-relation 2306. Up to 1137 conditions per place. [2024-11-12 08:20:20,076 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 27 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2024-11-12 08:20:20,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 124 flow [2024-11-12 08:20:20,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 08:20:20,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 08:20:20,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2024-11-12 08:20:20,078 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-11-12 08:20:20,078 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 64 flow. Second operand 3 states and 42 transitions. [2024-11-12 08:20:20,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 124 flow [2024-11-12 08:20:20,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 30 transitions, 124 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-12 08:20:20,081 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 76 flow [2024-11-12 08:20:20,081 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2024-11-12 08:20:20,083 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, -2 predicate places. [2024-11-12 08:20:20,083 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 76 flow [2024-11-12 08:20:20,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:20,084 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:20,084 INFO L206 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] [2024-11-12 08:20:20,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 08:20:20,084 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:20:20,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:20,086 INFO L85 PathProgramCache]: Analyzing trace with hash 321585607, now seen corresponding path program 1 times [2024-11-12 08:20:20,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:20,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875544156] [2024-11-12 08:20:20,088 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:20,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:20:20,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:20,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875544156] [2024-11-12 08:20:20,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875544156] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:20:20,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821402802] [2024-11-12 08:20:20,252 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:20,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:20,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:20:20,256 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) [2024-11-12 08:20:20,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 08:20:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:20,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-12 08:20:20,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:20:20,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:20:20,477 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:20:20,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:20:20,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821402802] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:20:20,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:20:20,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-12 08:20:20,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915442930] [2024-11-12 08:20:20,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:20:20,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 08:20:20,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:20,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 08:20:20,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-12 08:20:20,505 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-12 08:20:20,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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) [2024-11-12 08:20:20,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:20,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-12 08:20:20,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:20,736 INFO L124 PetriNetUnfolderBase]: 792/1140 cut-off events. [2024-11-12 08:20:20,736 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-12 08:20:20,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2322 conditions, 1140 events. 792/1140 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3700 event pairs, 608 based on Foata normal form. 0/956 useless extension candidates. Maximal degree in co-relation 2317. Up to 1137 conditions per place. [2024-11-12 08:20:20,743 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 27 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2024-11-12 08:20:20,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 32 transitions, 146 flow [2024-11-12 08:20:20,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 08:20:20,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 08:20:20,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2024-11-12 08:20:20,746 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.29444444444444445 [2024-11-12 08:20:20,746 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 76 flow. Second operand 5 states and 53 transitions. [2024-11-12 08:20:20,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 32 transitions, 146 flow [2024-11-12 08:20:20,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 142 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-12 08:20:20,750 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 98 flow [2024-11-12 08:20:20,751 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2024-11-12 08:20:20,752 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2024-11-12 08:20:20,753 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 98 flow [2024-11-12 08:20:20,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 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) [2024-11-12 08:20:20,754 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:20,754 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:20:20,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-12 08:20:20,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:20,959 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:20:20,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:20,960 INFO L85 PathProgramCache]: Analyzing trace with hash 836812775, now seen corresponding path program 2 times [2024-11-12 08:20:20,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:20,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825534758] [2024-11-12 08:20:20,960 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:20,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:21,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:21,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:21,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825534758] [2024-11-12 08:20:21,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825534758] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:20:21,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:20:21,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 08:20:21,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14564095] [2024-11-12 08:20:21,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:20:21,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 08:20:21,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:21,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 08:20:21,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 08:20:21,329 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-12 08:20:21,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-12 08:20:21,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:21,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-12 08:20:21,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:21,755 INFO L124 PetriNetUnfolderBase]: 1435/2062 cut-off events. [2024-11-12 08:20:21,755 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-12 08:20:21,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4199 conditions, 2062 events. 1435/2062 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 8255 event pairs, 608 based on Foata normal form. 1/1719 useless extension candidates. Maximal degree in co-relation 4192. Up to 1140 conditions per place. [2024-11-12 08:20:21,765 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 46 selfloop transitions, 2 changer transitions 20/69 dead transitions. [2024-11-12 08:20:21,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 69 transitions, 315 flow [2024-11-12 08:20:21,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 08:20:21,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 08:20:21,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 82 transitions. [2024-11-12 08:20:21,769 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2024-11-12 08:20:21,769 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 98 flow. Second operand 4 states and 82 transitions. [2024-11-12 08:20:21,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 69 transitions, 315 flow [2024-11-12 08:20:21,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 69 transitions, 305 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-12 08:20:21,773 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 102 flow [2024-11-12 08:20:21,774 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2024-11-12 08:20:21,775 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 7 predicate places. [2024-11-12 08:20:21,775 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 102 flow [2024-11-12 08:20:21,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2024-11-12 08:20:21,777 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:21,777 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-11-12 08:20:21,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-12 08:20:21,777 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:20:21,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:21,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1570224414, now seen corresponding path program 1 times [2024-11-12 08:20:21,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:21,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521122863] [2024-11-12 08:20:21,779 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:21,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:21,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:22,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-12 08:20:22,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:22,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521122863] [2024-11-12 08:20:22,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521122863] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:20:22,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:20:22,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 08:20:22,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133267573] [2024-11-12 08:20:22,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:20:22,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 08:20:22,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:22,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 08:20:22,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 08:20:22,069 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-12 08:20:22,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-12 08:20:22,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:22,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-12 08:20:22,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:22,531 INFO L124 PetriNetUnfolderBase]: 2206/3150 cut-off events. [2024-11-12 08:20:22,531 INFO L125 PetriNetUnfolderBase]: For 695/695 co-relation queries the response was YES. [2024-11-12 08:20:22,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6950 conditions, 3150 events. 2206/3150 cut-off events. For 695/695 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 13261 event pairs, 983 based on Foata normal form. 1/2794 useless extension candidates. Maximal degree in co-relation 6940. Up to 1767 conditions per place. [2024-11-12 08:20:22,545 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 47 selfloop transitions, 2 changer transitions 19/69 dead transitions. [2024-11-12 08:20:22,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 69 transitions, 336 flow [2024-11-12 08:20:22,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 08:20:22,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 08:20:22,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2024-11-12 08:20:22,550 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5486111111111112 [2024-11-12 08:20:22,550 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 102 flow. Second operand 4 states and 79 transitions. [2024-11-12 08:20:22,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 69 transitions, 336 flow [2024-11-12 08:20:22,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 69 transitions, 328 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-12 08:20:22,553 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 112 flow [2024-11-12 08:20:22,553 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2024-11-12 08:20:22,555 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 9 predicate places. [2024-11-12 08:20:22,556 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 112 flow [2024-11-12 08:20:22,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-11-12 08:20:22,556 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:22,557 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-11-12 08:20:22,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-12 08:20:22,557 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:20:22,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:22,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1098083635, now seen corresponding path program 1 times [2024-11-12 08:20:22,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:22,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114111411] [2024-11-12 08:20:22,559 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:22,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:23,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:23,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:23,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114111411] [2024-11-12 08:20:23,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114111411] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:20:23,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183832156] [2024-11-12 08:20:23,812 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:23,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:23,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:20:23,814 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) [2024-11-12 08:20:23,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 08:20:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:23,939 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-12 08:20:23,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:20:24,589 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 157 treesize of output 101 [2024-11-12 08:20:25,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:25,611 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:20:27,065 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:20:27,066 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 195 treesize of output 103 [2024-11-12 08:20:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:27,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183832156] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:20:27,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:20:27,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2024-11-12 08:20:27,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023992073] [2024-11-12 08:20:27,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:20:27,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-12 08:20:27,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:27,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-12 08:20:27,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2024-11-12 08:20:27,266 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-12 08:20:27,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 112 flow. Second operand has 28 states, 28 states have (on average 6.964285714285714) internal successors, (195), 28 states have internal predecessors, (195), 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) [2024-11-12 08:20:27,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:27,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-12 08:20:27,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:38,353 INFO L124 PetriNetUnfolderBase]: 11881/17127 cut-off events. [2024-11-12 08:20:38,353 INFO L125 PetriNetUnfolderBase]: For 3636/3636 co-relation queries the response was YES. [2024-11-12 08:20:38,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39568 conditions, 17127 events. 11881/17127 cut-off events. For 3636/3636 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 97025 event pairs, 622 based on Foata normal form. 12/16153 useless extension candidates. Maximal degree in co-relation 39557. Up to 2089 conditions per place. [2024-11-12 08:20:38,457 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 575 selfloop transitions, 151 changer transitions 102/829 dead transitions. [2024-11-12 08:20:38,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 829 transitions, 3821 flow [2024-11-12 08:20:38,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-11-12 08:20:38,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2024-11-12 08:20:38,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 1101 transitions. [2024-11-12 08:20:38,467 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4497549019607843 [2024-11-12 08:20:38,467 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 112 flow. Second operand 68 states and 1101 transitions. [2024-11-12 08:20:38,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 829 transitions, 3821 flow [2024-11-12 08:20:38,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 829 transitions, 3762 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-11-12 08:20:38,485 INFO L231 Difference]: Finished difference. Result has 153 places, 190 transitions, 1297 flow [2024-11-12 08:20:38,486 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=1297, PETRI_PLACES=153, PETRI_TRANSITIONS=190} [2024-11-12 08:20:38,486 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 118 predicate places. [2024-11-12 08:20:38,487 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 190 transitions, 1297 flow [2024-11-12 08:20:38,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.964285714285714) internal successors, (195), 28 states have internal predecessors, (195), 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) [2024-11-12 08:20:38,487 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:38,487 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-11-12 08:20:38,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-12 08:20:38,688 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 [2024-11-12 08:20:38,688 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:20:38,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:38,689 INFO L85 PathProgramCache]: Analyzing trace with hash 322423495, now seen corresponding path program 2 times [2024-11-12 08:20:38,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:38,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964758860] [2024-11-12 08:20:38,690 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:38,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:38,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:39,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:39,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:39,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964758860] [2024-11-12 08:20:39,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964758860] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:20:39,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784944930] [2024-11-12 08:20:39,703 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 08:20:39,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:39,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:20:39,706 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) [2024-11-12 08:20:39,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 08:20:39,879 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 08:20:39,879 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:20:39,885 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-12 08:20:39,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:20:40,583 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 85 treesize of output 53 [2024-11-12 08:20:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:40,690 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:20:41,464 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-12 08:20:41,465 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 135 treesize of output 70 [2024-11-12 08:20:41,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:41,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784944930] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:20:41,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:20:41,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2024-11-12 08:20:41,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704082105] [2024-11-12 08:20:41,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:20:41,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-12 08:20:41,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:41,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-12 08:20:41,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2024-11-12 08:20:41,573 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-12 08:20:41,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 190 transitions, 1297 flow. Second operand has 28 states, 28 states have (on average 6.857142857142857) internal successors, (192), 28 states have internal predecessors, (192), 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) [2024-11-12 08:20:41,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:41,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-12 08:20:41,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:49,444 INFO L124 PetriNetUnfolderBase]: 18487/27185 cut-off events. [2024-11-12 08:20:49,444 INFO L125 PetriNetUnfolderBase]: For 604679/604679 co-relation queries the response was YES. [2024-11-12 08:20:49,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134393 conditions, 27185 events. 18487/27185 cut-off events. For 604679/604679 co-relation queries the response was YES. Maximal size of possible extension queue 946. Compared 170447 event pairs, 4324 based on Foata normal form. 9/27194 useless extension candidates. Maximal degree in co-relation 134338. Up to 7765 conditions per place. [2024-11-12 08:20:49,834 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 317 selfloop transitions, 229 changer transitions 87/634 dead transitions. [2024-11-12 08:20:49,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 634 transitions, 5937 flow [2024-11-12 08:20:49,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-12 08:20:49,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-12 08:20:49,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 401 transitions. [2024-11-12 08:20:49,838 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4125514403292181 [2024-11-12 08:20:49,838 INFO L175 Difference]: Start difference. First operand has 153 places, 190 transitions, 1297 flow. Second operand 27 states and 401 transitions. [2024-11-12 08:20:49,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 634 transitions, 5937 flow [2024-11-12 08:20:52,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 634 transitions, 5226 flow, removed 317 selfloop flow, removed 12 redundant places. [2024-11-12 08:20:52,162 INFO L231 Difference]: Finished difference. Result has 177 places, 333 transitions, 3203 flow [2024-11-12 08:20:52,162 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1138, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3203, PETRI_PLACES=177, PETRI_TRANSITIONS=333} [2024-11-12 08:20:52,163 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 142 predicate places. [2024-11-12 08:20:52,163 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 333 transitions, 3203 flow [2024-11-12 08:20:52,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.857142857142857) internal successors, (192), 28 states have internal predecessors, (192), 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) [2024-11-12 08:20:52,164 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:52,164 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-11-12 08:20:52,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-12 08:20:52,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:52,365 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:20:52,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:52,366 INFO L85 PathProgramCache]: Analyzing trace with hash 581826275, now seen corresponding path program 3 times [2024-11-12 08:20:52,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:52,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876736781] [2024-11-12 08:20:52,366 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:52,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:52,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:53,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:53,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:53,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876736781] [2024-11-12 08:20:53,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876736781] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:20:53,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319264073] [2024-11-12 08:20:53,293 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 08:20:53,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:53,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:20:53,297 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) [2024-11-12 08:20:53,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 08:20:53,417 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 08:20:53,417 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:20:53,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-12 08:20:53,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:20:53,876 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 112 treesize of output 72 [2024-11-12 08:20:54,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:54,020 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:20:54,452 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:20:54,452 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 102 treesize of output 62 [2024-11-12 08:20:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:54,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319264073] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:20:54,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:20:54,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 27 [2024-11-12 08:20:54,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577534837] [2024-11-12 08:20:54,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:20:54,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-12 08:20:54,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:54,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-12 08:20:54,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2024-11-12 08:20:54,726 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-12 08:20:54,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 333 transitions, 3203 flow. Second operand has 27 states, 27 states have (on average 7.074074074074074) internal successors, (191), 27 states have internal predecessors, (191), 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) [2024-11-12 08:20:54,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:54,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-12 08:20:54,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:03,126 INFO L124 PetriNetUnfolderBase]: 21461/31409 cut-off events. [2024-11-12 08:21:03,126 INFO L125 PetriNetUnfolderBase]: For 862942/862942 co-relation queries the response was YES. [2024-11-12 08:21:03,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171299 conditions, 31409 events. 21461/31409 cut-off events. For 862942/862942 co-relation queries the response was YES. Maximal size of possible extension queue 1048. Compared 199268 event pairs, 6661 based on Foata normal form. 8/31417 useless extension candidates. Maximal degree in co-relation 171235. Up to 11507 conditions per place. [2024-11-12 08:21:03,594 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 404 selfloop transitions, 211 changer transitions 74/690 dead transitions. [2024-11-12 08:21:03,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 690 transitions, 8846 flow [2024-11-12 08:21:03,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-12 08:21:03,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-12 08:21:03,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 453 transitions. [2024-11-12 08:21:03,597 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3932291666666667 [2024-11-12 08:21:03,597 INFO L175 Difference]: Start difference. First operand has 177 places, 333 transitions, 3203 flow. Second operand 32 states and 453 transitions. [2024-11-12 08:21:03,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 690 transitions, 8846 flow [2024-11-12 08:21:10,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 690 transitions, 7418 flow, removed 685 selfloop flow, removed 10 redundant places. [2024-11-12 08:21:10,252 INFO L231 Difference]: Finished difference. Result has 208 places, 402 transitions, 4145 flow [2024-11-12 08:21:10,252 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=2705, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=4145, PETRI_PLACES=208, PETRI_TRANSITIONS=402} [2024-11-12 08:21:10,253 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 173 predicate places. [2024-11-12 08:21:10,253 INFO L471 AbstractCegarLoop]: Abstraction has has 208 places, 402 transitions, 4145 flow [2024-11-12 08:21:10,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 7.074074074074074) internal successors, (191), 27 states have internal predecessors, (191), 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) [2024-11-12 08:21:10,254 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:10,254 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-11-12 08:21:10,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-12 08:21:10,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:10,456 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-12 08:21:10,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:10,457 INFO L85 PathProgramCache]: Analyzing trace with hash 205748309, now seen corresponding path program 4 times [2024-11-12 08:21:10,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:10,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845613854] [2024-11-12 08:21:10,457 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:10,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:11,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:11,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845613854] [2024-11-12 08:21:11,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845613854] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:21:11,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233575448] [2024-11-12 08:21:11,442 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 08:21:11,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:11,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:21:11,444 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:21:11,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 08:21:11,558 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 08:21:11,558 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:21:11,560 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-12 08:21:11,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:21:11,804 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 156 treesize of output 100 [2024-11-12 08:21:12,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:12,375 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:21:13,171 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-12 08:21:13,172 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 135 treesize of output 70 [2024-11-12 08:21:13,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:13,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233575448] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:21:13,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:21:13,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 24 [2024-11-12 08:21:13,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790533818] [2024-11-12 08:21:13,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:21:13,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-12 08:21:13,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:13,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-12 08:21:13,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2024-11-12 08:21:13,233 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-12 08:21:13,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 402 transitions, 4145 flow. Second operand has 24 states, 24 states have (on average 7.25) internal successors, (174), 24 states have internal predecessors, (174), 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) [2024-11-12 08:21:13,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:13,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-12 08:21:13,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:32,233 INFO L124 PetriNetUnfolderBase]: 43598/63711 cut-off events. [2024-11-12 08:21:32,233 INFO L125 PetriNetUnfolderBase]: For 2158496/2158496 co-relation queries the response was YES. [2024-11-12 08:21:33,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366293 conditions, 63711 events. 43598/63711 cut-off events. For 2158496/2158496 co-relation queries the response was YES. Maximal size of possible extension queue 2129. Compared 442324 event pairs, 4834 based on Foata normal form. 24/63735 useless extension candidates. Maximal degree in co-relation 366220. Up to 9181 conditions per place. [2024-11-12 08:21:33,454 INFO L140 encePairwiseOnDemand]: 24/36 looper letters, 716 selfloop transitions, 653 changer transitions 136/1506 dead transitions. [2024-11-12 08:21:33,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 1506 transitions, 18868 flow [2024-11-12 08:21:33,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-12 08:21:33,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2024-11-12 08:21:33,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 1071 transitions. [2024-11-12 08:21:33,459 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46484375 [2024-11-12 08:21:33,459 INFO L175 Difference]: Start difference. First operand has 208 places, 402 transitions, 4145 flow. Second operand 64 states and 1071 transitions. [2024-11-12 08:21:33,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 1506 transitions, 18868 flow