./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bc55f480d2dabcba35697f502078f181c178ae095f610e1cdbc5d03f14d18670 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 23:47:32,766 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 23:47:32,837 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-13 23:47:32,843 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 23:47:32,843 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 23:47:32,871 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 23:47:32,871 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 23:47:32,872 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 23:47:32,872 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 23:47:32,872 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 23:47:32,872 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-13 23:47:32,872 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-13 23:47:32,872 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-13 23:47:32,873 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-13 23:47:32,873 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-13 23:47:32,873 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-13 23:47:32,873 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-13 23:47:32,873 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-13 23:47:32,874 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-13 23:47:32,874 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-13 23:47:32,874 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-13 23:47:32,874 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-13 23:47:32,875 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 23:47:32,875 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 23:47:32,875 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 23:47:32,875 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 23:47:32,875 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 23:47:32,876 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 23:47:32,876 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 23:47:32,876 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 23:47:32,880 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 23:47:32,880 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 23:47:32,880 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 23:47:32,880 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 23:47:32,880 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 23:47:32,880 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 23:47:32,881 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 23:47:32,881 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 23:47:32,881 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:47:32,881 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 23:47:32,881 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 23:47:32,881 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 23:47:32,881 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-13 23:47:32,881 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 23:47:32,882 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 23:47:32,882 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-13 23:47:32,882 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 23:47:32,882 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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 -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E 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 -> Taipan 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 -> bc55f480d2dabcba35697f502078f181c178ae095f610e1cdbc5d03f14d18670 [2024-11-13 23:47:33,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 23:47:33,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 23:47:33,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 23:47:33,261 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 23:47:33,262 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 23:47:33,263 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c Unable to find full path for "g++" [2024-11-13 23:47:35,372 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 23:47:35,690 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 23:47:35,693 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2024-11-13 23:47:35,706 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/data/5280a29bf/502092904721489e85b767dd584eb14e/FLAGd81064e3e [2024-11-13 23:47:35,734 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/data/5280a29bf/502092904721489e85b767dd584eb14e [2024-11-13 23:47:35,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 23:47:35,742 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 23:47:35,747 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 23:47:35,747 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 23:47:35,757 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 23:47:35,758 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:47:35" (1/1) ... [2024-11-13 23:47:35,759 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a1cc202 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:47:35, skipping insertion in model container [2024-11-13 23:47:35,760 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:47:35" (1/1) ... [2024-11-13 23:47:35,787 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 23:47:36,043 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2423,2436] [2024-11-13 23:47:36,066 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:47:36,080 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 23:47:36,105 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2423,2436] [2024-11-13 23:47:36,109 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:47:36,127 INFO L204 MainTranslator]: Completed translation [2024-11-13 23:47:36,128 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:47:36 WrapperNode [2024-11-13 23:47:36,128 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 23:47:36,130 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 23:47:36,130 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 23:47:36,130 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 23:47:36,139 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:47:36" (1/1) ... [2024-11-13 23:47:36,146 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:47:36" (1/1) ... [2024-11-13 23:47:36,171 INFO L138 Inliner]: procedures = 21, calls = 21, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 132 [2024-11-13 23:47:36,171 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 23:47:36,172 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 23:47:36,172 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 23:47:36,172 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 23:47:36,181 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:47:36" (1/1) ... [2024-11-13 23:47:36,181 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:47:36" (1/1) ... [2024-11-13 23:47:36,184 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:47:36" (1/1) ... [2024-11-13 23:47:36,184 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:47:36" (1/1) ... [2024-11-13 23:47:36,191 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:47:36" (1/1) ... [2024-11-13 23:47:36,196 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:47:36" (1/1) ... [2024-11-13 23:47:36,197 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:47:36" (1/1) ... [2024-11-13 23:47:36,198 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:47:36" (1/1) ... [2024-11-13 23:47:36,201 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 23:47:36,202 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 23:47:36,202 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 23:47:36,202 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 23:47:36,204 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:47:36" (1/1) ... [2024-11-13 23:47:36,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:47:36,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:47:36,249 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-13 23:47:36,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-13 23:47:36,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 23:47:36,288 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-13 23:47:36,288 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-13 23:47:36,288 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-13 23:47:36,288 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-13 23:47:36,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-13 23:47:36,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-13 23:47:36,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 23:47:36,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 23:47:36,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 23:47:36,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-13 23:47:36,291 WARN L207 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-13 23:47:36,445 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 23:47:36,447 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 23:47:36,838 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 23:47:36,838 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 23:47:37,119 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 23:47:37,119 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-13 23:47:37,120 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:47:37 BoogieIcfgContainer [2024-11-13 23:47:37,120 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 23:47:37,123 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 23:47:37,123 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 23:47:37,129 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 23:47:37,130 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 11:47:35" (1/3) ... [2024-11-13 23:47:37,131 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc4f657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:47:37, skipping insertion in model container [2024-11-13 23:47:37,131 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:47:36" (2/3) ... [2024-11-13 23:47:37,131 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc4f657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:47:37, skipping insertion in model container [2024-11-13 23:47:37,131 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:47:37" (3/3) ... [2024-11-13 23:47:37,133 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2024-11-13 23:47:37,153 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 23:47:37,155 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-channel-sum.wvr.c that has 3 procedures, 32 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-13 23:47:37,155 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 23:47:37,248 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-13 23:47:37,292 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 36 transitions, 86 flow [2024-11-13 23:47:37,355 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 141 states, 140 states have (on average 2.5) internal successors, (350), 140 states have internal predecessors, (350), 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) [2024-11-13 23:47:37,390 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 23:47:37,405 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=FINITE_AUTOMATA, 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;@55d1089b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 23:47:37,407 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-13 23:47:37,410 INFO L276 IsEmpty]: Start isEmpty. Operand has 141 states, 140 states have (on average 2.5) internal successors, (350), 140 states have internal predecessors, (350), 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) [2024-11-13 23:47:37,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-13 23:47:37,424 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:47:37,425 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:47:37,426 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 23:47:37,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:47:37,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1620556297, now seen corresponding path program 1 times [2024-11-13 23:47:37,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:47:37,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9574672] [2024-11-13 23:47:37,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:47:37,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:47:37,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:47:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:47:37,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:47:37,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9574672] [2024-11-13 23:47:37,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9574672] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:47:37,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:47:37,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 23:47:37,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444593890] [2024-11-13 23:47:37,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:47:37,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-13 23:47:37,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:47:37,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-13 23:47:37,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-13 23:47:37,797 INFO L87 Difference]: Start difference. First operand has 141 states, 140 states have (on average 2.5) internal successors, (350), 140 states have internal predecessors, (350), 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) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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) [2024-11-13 23:47:37,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:47:37,887 INFO L93 Difference]: Finished difference Result 166 states and 396 transitions. [2024-11-13 23:47:37,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-13 23:47:37,890 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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) Word has length 19 [2024-11-13 23:47:37,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:47:37,902 INFO L225 Difference]: With dead ends: 166 [2024-11-13 23:47:37,902 INFO L226 Difference]: Without dead ends: 141 [2024-11-13 23:47:37,905 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-13 23:47:37,909 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:47:37,910 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:47:37,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-11-13 23:47:37,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2024-11-13 23:47:37,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.4214285714285713) internal successors, (339), 140 states have internal predecessors, (339), 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) [2024-11-13 23:47:37,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 339 transitions. [2024-11-13 23:47:37,977 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 339 transitions. Word has length 19 [2024-11-13 23:47:37,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:47:37,979 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 339 transitions. [2024-11-13 23:47:37,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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) [2024-11-13 23:47:37,980 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 339 transitions. [2024-11-13 23:47:37,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-13 23:47:37,983 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:47:37,984 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:47:37,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 23:47:37,986 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 23:47:37,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:47:37,987 INFO L85 PathProgramCache]: Analyzing trace with hash -2106355134, now seen corresponding path program 1 times [2024-11-13 23:47:37,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:47:37,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867776577] [2024-11-13 23:47:37,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:47:37,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:47:38,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:47:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:47:38,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:47:38,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867776577] [2024-11-13 23:47:38,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867776577] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:47:38,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:47:38,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 23:47:38,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202449938] [2024-11-13 23:47:38,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:47:38,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 23:47:38,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:47:38,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 23:47:38,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:47:38,235 INFO L87 Difference]: Start difference. First operand 141 states and 339 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 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) [2024-11-13 23:47:38,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:47:38,368 INFO L93 Difference]: Finished difference Result 251 states and 609 transitions. [2024-11-13 23:47:38,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:47:38,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 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) Word has length 20 [2024-11-13 23:47:38,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:47:38,371 INFO L225 Difference]: With dead ends: 251 [2024-11-13 23:47:38,371 INFO L226 Difference]: Without dead ends: 213 [2024-11-13 23:47:38,376 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:47:38,377 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:47:38,380 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 12 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:47:38,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2024-11-13 23:47:38,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 165. [2024-11-13 23:47:38,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.4390243902439024) internal successors, (400), 164 states have internal predecessors, (400), 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) [2024-11-13 23:47:38,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 400 transitions. [2024-11-13 23:47:38,416 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 400 transitions. Word has length 20 [2024-11-13 23:47:38,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:47:38,416 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 400 transitions. [2024-11-13 23:47:38,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 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) [2024-11-13 23:47:38,416 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 400 transitions. [2024-11-13 23:47:38,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-13 23:47:38,420 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:47:38,420 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:47:38,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 23:47:38,421 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 23:47:38,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:47:38,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1253551499, now seen corresponding path program 1 times [2024-11-13 23:47:38,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:47:38,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055440538] [2024-11-13 23:47:38,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:47:38,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:47:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:47:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:47:38,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:47:38,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055440538] [2024-11-13 23:47:38,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055440538] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:47:38,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:47:38,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 23:47:38,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799830101] [2024-11-13 23:47:38,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:47:38,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 23:47:38,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:47:38,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 23:47:38,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:47:38,600 INFO L87 Difference]: Start difference. First operand 165 states and 400 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:47:38,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:47:38,733 INFO L93 Difference]: Finished difference Result 319 states and 762 transitions. [2024-11-13 23:47:38,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:47:38,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-13 23:47:38,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:47:38,737 INFO L225 Difference]: With dead ends: 319 [2024-11-13 23:47:38,737 INFO L226 Difference]: Without dead ends: 201 [2024-11-13 23:47:38,738 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:47:38,742 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:47:38,744 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 17 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:47:38,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-11-13 23:47:38,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 168. [2024-11-13 23:47:38,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.407185628742515) internal successors, (402), 167 states have internal predecessors, (402), 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) [2024-11-13 23:47:38,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 402 transitions. [2024-11-13 23:47:38,780 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 402 transitions. Word has length 23 [2024-11-13 23:47:38,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:47:38,780 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 402 transitions. [2024-11-13 23:47:38,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:47:38,780 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 402 transitions. [2024-11-13 23:47:38,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-13 23:47:38,782 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:47:38,782 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:47:38,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 23:47:38,783 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 23:47:38,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:47:38,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1298087794, now seen corresponding path program 1 times [2024-11-13 23:47:38,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:47:38,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037114979] [2024-11-13 23:47:38,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:47:38,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:47:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:47:39,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:47:39,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:47:39,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037114979] [2024-11-13 23:47:39,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037114979] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:47:39,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:47:39,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 23:47:39,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272325220] [2024-11-13 23:47:39,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:47:39,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:47:39,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:47:39,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:47:39,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:47:39,135 INFO L87 Difference]: Start difference. First operand 168 states and 402 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:47:39,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:47:39,284 INFO L93 Difference]: Finished difference Result 331 states and 799 transitions. [2024-11-13 23:47:39,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:47:39,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-13 23:47:39,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:47:39,287 INFO L225 Difference]: With dead ends: 331 [2024-11-13 23:47:39,289 INFO L226 Difference]: Without dead ends: 169 [2024-11-13 23:47:39,290 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:47:39,291 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:47:39,292 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 21 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:47:39,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-13 23:47:39,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2024-11-13 23:47:39,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.3988095238095237) internal successors, (403), 168 states have internal predecessors, (403), 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) [2024-11-13 23:47:39,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 403 transitions. [2024-11-13 23:47:39,324 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 403 transitions. Word has length 29 [2024-11-13 23:47:39,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:47:39,325 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 403 transitions. [2024-11-13 23:47:39,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:47:39,328 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 403 transitions. [2024-11-13 23:47:39,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-13 23:47:39,329 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:47:39,330 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:47:39,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 23:47:39,330 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 23:47:39,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:47:39,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1046416462, now seen corresponding path program 1 times [2024-11-13 23:47:39,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:47:39,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734967040] [2024-11-13 23:47:39,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:47:39,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:47:39,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:47:40,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:47:40,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:47:40,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734967040] [2024-11-13 23:47:40,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734967040] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:47:40,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428493563] [2024-11-13 23:47:40,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:47:40,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:47:40,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:47:40,782 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:47:40,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 23:47:40,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:47:40,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-13 23:47:40,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:47:41,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-13 23:47:41,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:47:41,658 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:47:42,678 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 61 treesize of output 55 [2024-11-13 23:47:42,703 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:47:42,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 68 [2024-11-13 23:47:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:47:43,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428493563] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:47:43,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1608066537] [2024-11-13 23:47:43,105 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1715) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:168) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-13 23:47:43,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:47:43,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2024-11-13 23:47:43,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079958928] [2024-11-13 23:47:43,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:47:43,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-13 23:47:43,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:47:43,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-13 23:47:43,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2024-11-13 23:47:43,111 INFO L87 Difference]: Start difference. First operand 169 states and 403 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 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) [2024-11-13 23:47:46,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:47:46,153 INFO L93 Difference]: Finished difference Result 727 states and 1822 transitions. [2024-11-13 23:47:46,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-13 23:47:46,154 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 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) Word has length 30 [2024-11-13 23:47:46,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:47:46,158 INFO L225 Difference]: With dead ends: 727 [2024-11-13 23:47:46,159 INFO L226 Difference]: Without dead ends: 560 [2024-11-13 23:47:46,161 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=676, Invalid=2294, Unknown=0, NotChecked=0, Total=2970 [2024-11-13 23:47:46,162 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 499 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:47:46,163 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [499 Valid, 210 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-13 23:47:46,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2024-11-13 23:47:46,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 303. [2024-11-13 23:47:46,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.4304635761589406) internal successors, (734), 302 states have internal predecessors, (734), 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) [2024-11-13 23:47:46,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 734 transitions. [2024-11-13 23:47:46,203 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 734 transitions. Word has length 30 [2024-11-13 23:47:46,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:47:46,203 INFO L471 AbstractCegarLoop]: Abstraction has 303 states and 734 transitions. [2024-11-13 23:47:46,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 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) [2024-11-13 23:47:46,204 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 734 transitions. [2024-11-13 23:47:46,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-13 23:47:46,206 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:47:46,206 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:47:46,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 23:47:46,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:47:46,407 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 23:47:46,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:47:46,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1755006639, now seen corresponding path program 1 times [2024-11-13 23:47:46,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:47:46,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019656952] [2024-11-13 23:47:46,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:47:46,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:47:46,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:47:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 23:47:46,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:47:46,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019656952] [2024-11-13 23:47:46,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019656952] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:47:46,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:47:46,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 23:47:46,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41057039] [2024-11-13 23:47:46,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:47:46,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 23:47:46,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:47:46,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 23:47:46,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:47:46,503 INFO L87 Difference]: Start difference. First operand 303 states and 734 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2024-11-13 23:47:46,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:47:46,612 INFO L93 Difference]: Finished difference Result 554 states and 1362 transitions. [2024-11-13 23:47:46,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:47:46,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) Word has length 30 [2024-11-13 23:47:46,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:47:46,618 INFO L225 Difference]: With dead ends: 554 [2024-11-13 23:47:46,619 INFO L226 Difference]: Without dead ends: 301 [2024-11-13 23:47:46,620 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:47:46,620 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:47:46,621 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 15 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:47:46,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2024-11-13 23:47:46,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 251. [2024-11-13 23:47:46,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.368) internal successors, (592), 250 states have internal predecessors, (592), 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) [2024-11-13 23:47:46,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 592 transitions. [2024-11-13 23:47:46,657 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 592 transitions. Word has length 30 [2024-11-13 23:47:46,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:47:46,657 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 592 transitions. [2024-11-13 23:47:46,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2024-11-13 23:47:46,657 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 592 transitions. [2024-11-13 23:47:46,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-13 23:47:46,661 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:47:46,661 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:47:46,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-13 23:47:46,662 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 23:47:46,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:47:46,662 INFO L85 PathProgramCache]: Analyzing trace with hash 711604366, now seen corresponding path program 2 times [2024-11-13 23:47:46,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:47:46,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23011201] [2024-11-13 23:47:46,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:47:46,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:47:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:47:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:47:47,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:47:47,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23011201] [2024-11-13 23:47:47,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23011201] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:47:47,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023366850] [2024-11-13 23:47:47,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:47:47,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:47:47,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:47:47,987 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:47:48,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 23:47:48,136 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 23:47:48,136 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:47:48,138 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 23:47:48,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:47:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:47:48,338 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:47:48,472 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:47:48,473 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 40 treesize of output 24 [2024-11-13 23:47:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 23:47:48,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023366850] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:47:48,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1930284782] [2024-11-13 23:47:48,639 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1715) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:168) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-13 23:47:48,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:47:48,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 6] total 20 [2024-11-13 23:47:48,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023085016] [2024-11-13 23:47:48,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:47:48,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 23:47:48,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:47:48,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 23:47:48,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2024-11-13 23:47:48,646 INFO L87 Difference]: Start difference. First operand 251 states and 592 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 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) [2024-11-13 23:47:49,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:47:49,673 INFO L93 Difference]: Finished difference Result 498 states and 1201 transitions. [2024-11-13 23:47:49,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 23:47:49,675 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 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) Word has length 31 [2024-11-13 23:47:49,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:47:49,682 INFO L225 Difference]: With dead ends: 498 [2024-11-13 23:47:49,683 INFO L226 Difference]: Without dead ends: 465 [2024-11-13 23:47:49,684 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2024-11-13 23:47:49,685 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 208 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 23:47:49,687 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 153 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 23:47:49,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2024-11-13 23:47:49,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 279. [2024-11-13 23:47:49,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.41726618705036) internal successors, (672), 278 states have internal predecessors, (672), 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) [2024-11-13 23:47:49,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 672 transitions. [2024-11-13 23:47:49,739 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 672 transitions. Word has length 31 [2024-11-13 23:47:49,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:47:49,739 INFO L471 AbstractCegarLoop]: Abstraction has 279 states and 672 transitions. [2024-11-13 23:47:49,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 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) [2024-11-13 23:47:49,740 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 672 transitions. [2024-11-13 23:47:49,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-13 23:47:49,741 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:47:49,741 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:47:49,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 23:47:49,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:47:49,942 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 23:47:49,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:47:49,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1204664783, now seen corresponding path program 3 times [2024-11-13 23:47:49,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:47:49,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133347200] [2024-11-13 23:47:49,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:47:49,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:47:49,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:47:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:47:50,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:47:50,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133347200] [2024-11-13 23:47:50,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133347200] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:47:50,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530882966] [2024-11-13 23:47:50,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:47:50,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:47:50,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:47:50,169 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:47:50,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 23:47:50,265 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:47:50,265 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:47:50,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 23:47:50,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:47:50,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:47:50,336 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 23:47:50,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530882966] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:47:50,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 23:47:50,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2024-11-13 23:47:50,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160831199] [2024-11-13 23:47:50,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:47:50,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:47:50,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:47:50,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:47:50,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-13 23:47:50,339 INFO L87 Difference]: Start difference. First operand 279 states and 672 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:47:50,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:47:50,533 INFO L93 Difference]: Finished difference Result 712 states and 1763 transitions. [2024-11-13 23:47:50,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:47:50,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-13 23:47:50,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:47:50,539 INFO L225 Difference]: With dead ends: 712 [2024-11-13 23:47:50,540 INFO L226 Difference]: Without dead ends: 599 [2024-11-13 23:47:50,540 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-13 23:47:50,541 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:47:50,541 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 23 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:47:50,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2024-11-13 23:47:50,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 525. [2024-11-13 23:47:50,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 2.5057251908396947) internal successors, (1313), 524 states have internal predecessors, (1313), 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) [2024-11-13 23:47:50,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1313 transitions. [2024-11-13 23:47:50,612 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1313 transitions. Word has length 33 [2024-11-13 23:47:50,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:47:50,613 INFO L471 AbstractCegarLoop]: Abstraction has 525 states and 1313 transitions. [2024-11-13 23:47:50,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:47:50,614 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1313 transitions. [2024-11-13 23:47:50,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-13 23:47:50,617 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:47:50,617 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:47:50,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-13 23:47:50,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:47:50,821 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 23:47:50,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:47:50,822 INFO L85 PathProgramCache]: Analyzing trace with hash 188872010, now seen corresponding path program 4 times [2024-11-13 23:47:50,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:47:50,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381931856] [2024-11-13 23:47:50,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:47:50,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:47:50,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:47:51,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:47:51,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:47:51,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381931856] [2024-11-13 23:47:51,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381931856] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:47:51,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722890871] [2024-11-13 23:47:51,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:47:51,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:47:51,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:47:51,073 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:47:51,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 23:47:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:47:51,191 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 23:47:51,192 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:47:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:47:51,354 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:47:51,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:47:51,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722890871] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:47:51,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [423512057] [2024-11-13 23:47:51,531 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1715) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:168) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-13 23:47:51,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:47:51,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2024-11-13 23:47:51,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305038244] [2024-11-13 23:47:51,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:47:51,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 23:47:51,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:47:51,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 23:47:51,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-11-13 23:47:51,537 INFO L87 Difference]: Start difference. First operand 525 states and 1313 transitions. Second operand has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 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) [2024-11-13 23:47:51,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:47:51,983 INFO L93 Difference]: Finished difference Result 838 states and 2117 transitions. [2024-11-13 23:47:51,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 23:47:51,984 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 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) Word has length 39 [2024-11-13 23:47:51,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:47:51,989 INFO L225 Difference]: With dead ends: 838 [2024-11-13 23:47:51,989 INFO L226 Difference]: Without dead ends: 436 [2024-11-13 23:47:51,990 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2024-11-13 23:47:51,992 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 68 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:47:51,993 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 78 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:47:51,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2024-11-13 23:47:52,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 436. [2024-11-13 23:47:52,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 2.535632183908046) internal successors, (1103), 435 states have internal predecessors, (1103), 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) [2024-11-13 23:47:52,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1103 transitions. [2024-11-13 23:47:52,049 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1103 transitions. Word has length 39 [2024-11-13 23:47:52,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:47:52,051 INFO L471 AbstractCegarLoop]: Abstraction has 436 states and 1103 transitions. [2024-11-13 23:47:52,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.294117647058823) internal successors, (73), 17 states have internal predecessors, (73), 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) [2024-11-13 23:47:52,051 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1103 transitions. [2024-11-13 23:47:52,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 23:47:52,054 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:47:52,054 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:47:52,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 23:47:52,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:47:52,258 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 23:47:52,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:47:52,259 INFO L85 PathProgramCache]: Analyzing trace with hash 761565450, now seen corresponding path program 5 times [2024-11-13 23:47:52,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:47:52,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625834541] [2024-11-13 23:47:52,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:47:52,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:47:52,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:47:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 23:47:52,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:47:52,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625834541] [2024-11-13 23:47:52,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625834541] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:47:52,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:47:52,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 23:47:52,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248411836] [2024-11-13 23:47:52,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:47:52,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:47:52,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:47:52,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:47:52,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:47:52,470 INFO L87 Difference]: Start difference. First operand 436 states and 1103 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2024-11-13 23:47:52,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:47:52,680 INFO L93 Difference]: Finished difference Result 934 states and 2425 transitions. [2024-11-13 23:47:52,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:47:52,680 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) Word has length 40 [2024-11-13 23:47:52,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:47:52,686 INFO L225 Difference]: With dead ends: 934 [2024-11-13 23:47:52,686 INFO L226 Difference]: Without dead ends: 595 [2024-11-13 23:47:52,687 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:47:52,688 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:47:52,688 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 24 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:47:52,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2024-11-13 23:47:52,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 534. [2024-11-13 23:47:52,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 2.5178236397748592) internal successors, (1342), 533 states have internal predecessors, (1342), 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) [2024-11-13 23:47:52,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 1342 transitions. [2024-11-13 23:47:52,759 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 1342 transitions. Word has length 40 [2024-11-13 23:47:52,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:47:52,760 INFO L471 AbstractCegarLoop]: Abstraction has 534 states and 1342 transitions. [2024-11-13 23:47:52,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2024-11-13 23:47:52,760 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 1342 transitions. [2024-11-13 23:47:52,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 23:47:52,762 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:47:52,762 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:47:52,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-13 23:47:52,763 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 23:47:52,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:47:52,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1470155627, now seen corresponding path program 1 times [2024-11-13 23:47:52,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:47:52,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777345839] [2024-11-13 23:47:52,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:47:52,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:47:52,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:47:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:47:54,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:47:54,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777345839] [2024-11-13 23:47:54,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777345839] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:47:54,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92041601] [2024-11-13 23:47:54,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:47:54,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:47:54,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:47:54,803 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:47:54,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 23:47:54,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:47:54,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-13 23:47:54,913 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:47:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:47:55,980 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:47:56,982 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:47:56,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-11-13 23:47:57,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:47:57,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92041601] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:47:57,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1078386238] [2024-11-13 23:47:57,777 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1715) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:168) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-13 23:47:57,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:47:57,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 43 [2024-11-13 23:47:57,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390269434] [2024-11-13 23:47:57,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:47:57,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-13 23:47:57,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:47:57,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-13 23:47:57,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1610, Unknown=0, NotChecked=0, Total=1892 [2024-11-13 23:47:57,781 INFO L87 Difference]: Start difference. First operand 534 states and 1342 transitions. Second operand has 44 states, 44 states have (on average 2.4545454545454546) internal successors, (108), 43 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:48:17,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:48:17,366 INFO L93 Difference]: Finished difference Result 3785 states and 9570 transitions. [2024-11-13 23:48:17,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2024-11-13 23:48:17,367 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.4545454545454546) internal successors, (108), 43 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-13 23:48:17,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:48:17,385 INFO L225 Difference]: With dead ends: 3785 [2024-11-13 23:48:17,385 INFO L226 Difference]: Without dead ends: 3110 [2024-11-13 23:48:17,395 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15895 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=5869, Invalid=34331, Unknown=0, NotChecked=0, Total=40200 [2024-11-13 23:48:17,396 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 2336 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 2927 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2336 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 3377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 2927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-13 23:48:17,396 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2336 Valid, 678 Invalid, 3377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 2927 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-11-13 23:48:17,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3110 states. [2024-11-13 23:48:17,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3110 to 1130. [2024-11-13 23:48:17,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1129 states have (on average 2.5261293179805135) internal successors, (2852), 1129 states have internal predecessors, (2852), 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) [2024-11-13 23:48:17,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 2852 transitions. [2024-11-13 23:48:17,704 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 2852 transitions. Word has length 40 [2024-11-13 23:48:17,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:48:17,704 INFO L471 AbstractCegarLoop]: Abstraction has 1130 states and 2852 transitions. [2024-11-13 23:48:17,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.4545454545454546) internal successors, (108), 43 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:48:17,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 2852 transitions. [2024-11-13 23:48:17,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 23:48:17,710 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:48:17,710 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:48:17,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-13 23:48:17,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:48:17,911 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 23:48:17,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:48:17,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1952680575, now seen corresponding path program 2 times [2024-11-13 23:48:17,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:48:17,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632424219] [2024-11-13 23:48:17,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:48:17,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:48:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:48:19,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:48:19,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:48:19,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632424219] [2024-11-13 23:48:19,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632424219] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:48:19,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115901499] [2024-11-13 23:48:19,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:48:19,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:48:19,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:48:19,552 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:48:19,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 23:48:19,673 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 23:48:19,674 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:48:19,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-13 23:48:19,679 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:48:20,841 INFO L349 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2024-11-13 23:48:20,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 21 [2024-11-13 23:48:20,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:48:20,911 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:48:21,813 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-11-13 23:48:21,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 60 [2024-11-13 23:48:22,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:48:22,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115901499] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:48:22,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [964749059] [2024-11-13 23:48:22,806 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1715) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:168) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-13 23:48:22,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:48:22,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 42 [2024-11-13 23:48:22,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850817040] [2024-11-13 23:48:22,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:48:22,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-13 23:48:22,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:48:22,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-13 23:48:22,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1565, Unknown=0, NotChecked=0, Total=1806 [2024-11-13 23:48:22,810 INFO L87 Difference]: Start difference. First operand 1130 states and 2852 transitions. Second operand has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 42 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:48:57,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:48:57,969 INFO L93 Difference]: Finished difference Result 9871 states and 24849 transitions. [2024-11-13 23:48:57,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 273 states. [2024-11-13 23:48:57,970 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 42 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-13 23:48:57,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:48:58,009 INFO L225 Difference]: With dead ends: 9871 [2024-11-13 23:48:58,009 INFO L226 Difference]: Without dead ends: 8028 [2024-11-13 23:48:58,023 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38592 ImplicationChecksByTransitivity, 27.8s TimeCoverageRelationStatistics Valid=14331, Invalid=77175, Unknown=0, NotChecked=0, Total=91506 [2024-11-13 23:48:58,023 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 2257 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 5660 mSolverCounterSat, 519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2257 SdHoareTripleChecker+Valid, 1149 SdHoareTripleChecker+Invalid, 6179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 5660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:48:58,023 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2257 Valid, 1149 Invalid, 6179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 5660 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2024-11-13 23:48:58,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8028 states. [2024-11-13 23:48:58,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8028 to 2646. [2024-11-13 23:48:58,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2646 states, 2645 states have (on average 2.622306238185255) internal successors, (6936), 2645 states have internal predecessors, (6936), 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) [2024-11-13 23:48:58,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2646 states to 2646 states and 6936 transitions. [2024-11-13 23:48:58,988 INFO L78 Accepts]: Start accepts. Automaton has 2646 states and 6936 transitions. Word has length 40 [2024-11-13 23:48:58,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:48:58,988 INFO L471 AbstractCegarLoop]: Abstraction has 2646 states and 6936 transitions. [2024-11-13 23:48:58,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 42 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:48:58,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2646 states and 6936 transitions. [2024-11-13 23:48:58,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 23:48:58,994 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:48:58,994 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:48:59,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 23:48:59,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-13 23:48:59,199 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 23:48:59,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:48:59,200 INFO L85 PathProgramCache]: Analyzing trace with hash -615083813, now seen corresponding path program 3 times [2024-11-13 23:48:59,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:48:59,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077452111] [2024-11-13 23:48:59,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:48:59,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:48:59,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:00,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:00,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077452111] [2024-11-13 23:49:00,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077452111] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:49:00,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65839230] [2024-11-13 23:49:00,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:49:00,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:49:00,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:49:00,740 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:49:00,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 23:49:00,839 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:49:00,840 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:49:00,842 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-13 23:49:00,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:49:00,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-13 23:49:01,658 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-11-13 23:49:01,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 15 [2024-11-13 23:49:01,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:01,699 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:49:03,226 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 138 treesize of output 126 [2024-11-13 23:49:03,290 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:49:03,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 241 treesize of output 258 [2024-11-13 23:49:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:09,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65839230] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:49:09,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1089838412] [2024-11-13 23:49:09,050 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1715) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:168) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-13 23:49:09,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:49:09,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2024-11-13 23:49:09,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904115989] [2024-11-13 23:49:09,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:49:09,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-13 23:49:09,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:09,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-13 23:49:09,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1495, Unknown=0, NotChecked=0, Total=1722 [2024-11-13 23:49:09,054 INFO L87 Difference]: Start difference. First operand 2646 states and 6936 transitions. Second operand has 42 states, 42 states have (on average 2.5714285714285716) internal successors, (108), 41 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:33,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:33,091 INFO L93 Difference]: Finished difference Result 11131 states and 29289 transitions. [2024-11-13 23:49:33,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2024-11-13 23:49:33,092 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.5714285714285716) internal successors, (108), 41 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-13 23:49:33,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:33,131 INFO L225 Difference]: With dead ends: 11131 [2024-11-13 23:49:33,131 INFO L226 Difference]: Without dead ends: 10758 [2024-11-13 23:49:33,137 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13052 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=4111, Invalid=28831, Unknown=0, NotChecked=0, Total=32942 [2024-11-13 23:49:33,137 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 1525 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 3125 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1525 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 3353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 3125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:33,137 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1525 Valid, 772 Invalid, 3353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 3125 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2024-11-13 23:49:33,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10758 states. [2024-11-13 23:49:34,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10758 to 3488. [2024-11-13 23:49:34,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3488 states, 3487 states have (on average 2.618009750501864) internal successors, (9129), 3487 states have internal predecessors, (9129), 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) [2024-11-13 23:49:34,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3488 states to 3488 states and 9129 transitions. [2024-11-13 23:49:34,375 INFO L78 Accepts]: Start accepts. Automaton has 3488 states and 9129 transitions. Word has length 40 [2024-11-13 23:49:34,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:34,375 INFO L471 AbstractCegarLoop]: Abstraction has 3488 states and 9129 transitions. [2024-11-13 23:49:34,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.5714285714285716) internal successors, (108), 41 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:34,375 INFO L276 IsEmpty]: Start isEmpty. Operand 3488 states and 9129 transitions. [2024-11-13 23:49:34,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 23:49:34,380 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:34,380 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:34,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 23:49:34,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-13 23:49:34,584 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 23:49:34,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:34,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1020358131, now seen corresponding path program 4 times [2024-11-13 23:49:34,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:34,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036162939] [2024-11-13 23:49:34,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:34,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:34,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:35,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:35,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036162939] [2024-11-13 23:49:35,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036162939] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:49:35,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749223106] [2024-11-13 23:49:35,766 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:49:35,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:49:35,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:49:35,769 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:49:35,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 23:49:35,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:35,871 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-13 23:49:35,873 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:49:36,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:36,595 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:49:37,053 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:49:37,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-11-13 23:49:37,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:37,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749223106] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:49:37,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [510028275] [2024-11-13 23:49:37,511 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1715) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:168) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-13 23:49:37,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:49:37,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 43 [2024-11-13 23:49:37,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713345553] [2024-11-13 23:49:37,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:49:37,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-13 23:49:37,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:37,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-13 23:49:37,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1603, Unknown=0, NotChecked=0, Total=1892 [2024-11-13 23:49:37,513 INFO L87 Difference]: Start difference. First operand 3488 states and 9129 transitions. Second operand has 44 states, 44 states have (on average 2.4545454545454546) internal successors, (108), 43 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:55,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:55,563 INFO L93 Difference]: Finished difference Result 12254 states and 32014 transitions. [2024-11-13 23:49:55,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2024-11-13 23:49:55,563 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.4545454545454546) internal successors, (108), 43 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-13 23:49:55,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:55,617 INFO L225 Difference]: With dead ends: 12254 [2024-11-13 23:49:55,617 INFO L226 Difference]: Without dead ends: 11947 [2024-11-13 23:49:55,624 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20626 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=5818, Invalid=42802, Unknown=0, NotChecked=0, Total=48620 [2024-11-13 23:49:55,625 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 1871 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 3544 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1871 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 3789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 3544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:55,625 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1871 Valid, 896 Invalid, 3789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 3544 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-13 23:49:55,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11947 states. [2024-11-13 23:49:56,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11947 to 3704. [2024-11-13 23:49:56,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3704 states, 3703 states have (on average 2.6170672427761277) internal successors, (9691), 3703 states have internal predecessors, (9691), 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) [2024-11-13 23:49:56,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3704 states to 3704 states and 9691 transitions. [2024-11-13 23:49:56,960 INFO L78 Accepts]: Start accepts. Automaton has 3704 states and 9691 transitions. Word has length 40 [2024-11-13 23:49:56,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:56,961 INFO L471 AbstractCegarLoop]: Abstraction has 3704 states and 9691 transitions. [2024-11-13 23:49:56,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.4545454545454546) internal successors, (108), 43 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:49:56,961 INFO L276 IsEmpty]: Start isEmpty. Operand 3704 states and 9691 transitions. [2024-11-13 23:49:56,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 23:49:56,970 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:56,971 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:56,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 23:49:57,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-13 23:49:57,171 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 23:49:57,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:57,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1412433987, now seen corresponding path program 5 times [2024-11-13 23:49:57,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:57,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930013067] [2024-11-13 23:49:57,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:57,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:57,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:49:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:58,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:49:58,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930013067] [2024-11-13 23:49:58,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930013067] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:49:58,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897717996] [2024-11-13 23:49:58,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:49:58,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:49:58,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:49:58,417 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:49:58,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 23:49:58,520 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-13 23:49:58,520 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:49:58,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-13 23:49:58,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:49:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:49:59,215 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:49:59,779 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:49:59,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-11-13 23:50:00,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:50:00,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897717996] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:50:00,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1538431488] [2024-11-13 23:50:00,248 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1715) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:168) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-13 23:50:00,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:50:00,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 43 [2024-11-13 23:50:00,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210639187] [2024-11-13 23:50:00,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:50:00,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-13 23:50:00,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:50:00,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-13 23:50:00,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1626, Unknown=0, NotChecked=0, Total=1892 [2024-11-13 23:50:00,250 INFO L87 Difference]: Start difference. First operand 3704 states and 9691 transitions. Second operand has 44 states, 44 states have (on average 2.4545454545454546) internal successors, (108), 43 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:50:14,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:50:14,230 INFO L93 Difference]: Finished difference Result 12852 states and 33871 transitions. [2024-11-13 23:50:14,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2024-11-13 23:50:14,231 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.4545454545454546) internal successors, (108), 43 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-13 23:50:14,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:50:14,276 INFO L225 Difference]: With dead ends: 12852 [2024-11-13 23:50:14,276 INFO L226 Difference]: Without dead ends: 11131 [2024-11-13 23:50:14,285 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9874 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=3502, Invalid=21938, Unknown=0, NotChecked=0, Total=25440 [2024-11-13 23:50:14,286 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 1252 mSDsluCounter, 1245 mSDsCounter, 0 mSdLazyCounter, 4657 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 4785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 4657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:50:14,286 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1252 Valid, 1301 Invalid, 4785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 4657 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-13 23:50:14,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11131 states. [2024-11-13 23:50:15,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11131 to 3546. [2024-11-13 23:50:15,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3546 states, 3545 states have (on average 2.58787023977433) internal successors, (9174), 3545 states have internal predecessors, (9174), 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) [2024-11-13 23:50:15,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 9174 transitions. [2024-11-13 23:50:15,470 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 9174 transitions. Word has length 40 [2024-11-13 23:50:15,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:50:15,470 INFO L471 AbstractCegarLoop]: Abstraction has 3546 states and 9174 transitions. [2024-11-13 23:50:15,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.4545454545454546) internal successors, (108), 43 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:50:15,471 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 9174 transitions. [2024-11-13 23:50:15,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-13 23:50:15,474 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:50:15,474 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:50:15,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-13 23:50:15,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-13 23:50:15,679 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 23:50:15,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:50:15,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1880732881, now seen corresponding path program 6 times [2024-11-13 23:50:15,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:50:15,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224728879] [2024-11-13 23:50:15,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:15,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:50:15,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:17,320 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:50:17,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:50:17,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224728879] [2024-11-13 23:50:17,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224728879] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:50:17,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171558864] [2024-11-13 23:50:17,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:50:17,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:50:17,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:50:17,323 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:50:17,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 23:50:17,405 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:50:17,405 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:50:17,407 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-13 23:50:17,408 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:50:17,790 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:50:17,790 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:50:18,164 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:50:18,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-11-13 23:50:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 23:50:18,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171558864] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:50:18,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [468441140] [2024-11-13 23:50:18,283 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1715) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:168) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-13 23:50:18,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:50:18,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 10] total 36 [2024-11-13 23:50:18,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649860779] [2024-11-13 23:50:18,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:50:18,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-13 23:50:18,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:50:18,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-13 23:50:18,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2024-11-13 23:50:18,285 INFO L87 Difference]: Start difference. First operand 3546 states and 9174 transitions. Second operand has 37 states, 37 states have (on average 2.918918918918919) internal successors, (108), 36 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:50:24,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:50:24,799 INFO L93 Difference]: Finished difference Result 6334 states and 16233 transitions. [2024-11-13 23:50:24,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-13 23:50:24,800 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.918918918918919) internal successors, (108), 36 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-13 23:50:24,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:50:24,824 INFO L225 Difference]: With dead ends: 6334 [2024-11-13 23:50:24,824 INFO L226 Difference]: Without dead ends: 6259 [2024-11-13 23:50:24,828 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3253 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1249, Invalid=8453, Unknown=0, NotChecked=0, Total=9702 [2024-11-13 23:50:24,828 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 700 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 1847 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-13 23:50:24,829 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 470 Invalid, 1908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1847 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-13 23:50:24,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6259 states. [2024-11-13 23:50:26,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6259 to 3546. [2024-11-13 23:50:26,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3546 states, 3545 states have (on average 2.58787023977433) internal successors, (9174), 3545 states have internal predecessors, (9174), 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) [2024-11-13 23:50:26,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 9174 transitions. [2024-11-13 23:50:26,250 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 9174 transitions. Word has length 41 [2024-11-13 23:50:26,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:50:26,250 INFO L471 AbstractCegarLoop]: Abstraction has 3546 states and 9174 transitions. [2024-11-13 23:50:26,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.918918918918919) internal successors, (108), 36 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:50:26,250 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 9174 transitions. [2024-11-13 23:50:26,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-13 23:50:26,254 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:50:26,255 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:50:26,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 23:50:26,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-13 23:50:26,455 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 23:50:26,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:50:26,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1379053119, now seen corresponding path program 7 times [2024-11-13 23:50:26,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:50:26,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020306132] [2024-11-13 23:50:26,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:26,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:50:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:50:28,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:50:28,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020306132] [2024-11-13 23:50:28,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020306132] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:50:28,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287862274] [2024-11-13 23:50:28,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:50:28,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:50:28,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:50:28,117 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:50:28,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 23:50:28,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:28,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-13 23:50:28,207 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:50:28,625 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:50:28,625 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:50:29,015 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:50:29,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-11-13 23:50:29,174 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 23:50:29,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287862274] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:50:29,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1356609254] [2024-11-13 23:50:29,175 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1715) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:168) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-13 23:50:29,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:50:29,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 10] total 36 [2024-11-13 23:50:29,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145390053] [2024-11-13 23:50:29,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:50:29,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-13 23:50:29,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:50:29,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-13 23:50:29,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2024-11-13 23:50:29,178 INFO L87 Difference]: Start difference. First operand 3546 states and 9174 transitions. Second operand has 37 states, 37 states have (on average 2.918918918918919) internal successors, (108), 36 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:50:35,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:50:35,329 INFO L93 Difference]: Finished difference Result 6113 states and 15685 transitions. [2024-11-13 23:50:35,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-11-13 23:50:35,330 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.918918918918919) internal successors, (108), 36 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-13 23:50:35,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:50:35,350 INFO L225 Difference]: With dead ends: 6113 [2024-11-13 23:50:35,351 INFO L226 Difference]: Without dead ends: 6030 [2024-11-13 23:50:35,353 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3290 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1177, Invalid=8723, Unknown=0, NotChecked=0, Total=9900 [2024-11-13 23:50:35,354 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 774 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 1620 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 1696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:50:35,354 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 414 Invalid, 1696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1620 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-13 23:50:35,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6030 states. [2024-11-13 23:50:36,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6030 to 3546. [2024-11-13 23:50:36,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3546 states, 3545 states have (on average 2.58787023977433) internal successors, (9174), 3545 states have internal predecessors, (9174), 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) [2024-11-13 23:50:36,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 9174 transitions. [2024-11-13 23:50:36,502 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 9174 transitions. Word has length 41 [2024-11-13 23:50:36,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:50:36,502 INFO L471 AbstractCegarLoop]: Abstraction has 3546 states and 9174 transitions. [2024-11-13 23:50:36,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.918918918918919) internal successors, (108), 36 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:50:36,502 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 9174 transitions. [2024-11-13 23:50:36,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-13 23:50:36,505 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:50:36,505 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:50:36,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 23:50:36,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-13 23:50:36,706 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 23:50:36,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:50:36,707 INFO L85 PathProgramCache]: Analyzing trace with hash -754407757, now seen corresponding path program 8 times [2024-11-13 23:50:36,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:50:36,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523902535] [2024-11-13 23:50:36,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:36,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:50:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:50:38,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:50:38,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523902535] [2024-11-13 23:50:38,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523902535] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:50:38,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82963796] [2024-11-13 23:50:38,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:50:38,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:50:38,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:50:38,745 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:50:38,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 23:50:38,855 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-13 23:50:38,855 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:50:38,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-13 23:50:38,858 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:50:39,212 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 23:50:39,212 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:50:39,530 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:50:39,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-11-13 23:50:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 23:50:39,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82963796] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:50:39,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1735851022] [2024-11-13 23:50:39,649 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1715) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:168) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-13 23:50:39,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:50:39,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 10] total 35 [2024-11-13 23:50:39,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858735176] [2024-11-13 23:50:39,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:50:39,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-13 23:50:39,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:50:39,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-13 23:50:39,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2024-11-13 23:50:39,652 INFO L87 Difference]: Start difference. First operand 3546 states and 9174 transitions. Second operand has 36 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 35 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:50:46,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:50:46,014 INFO L93 Difference]: Finished difference Result 6951 states and 17915 transitions. [2024-11-13 23:50:46,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-13 23:50:46,015 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 35 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-13 23:50:46,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:50:46,038 INFO L225 Difference]: With dead ends: 6951 [2024-11-13 23:50:46,039 INFO L226 Difference]: Without dead ends: 6871 [2024-11-13 23:50:46,042 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2118 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=838, Invalid=5968, Unknown=0, NotChecked=0, Total=6806 [2024-11-13 23:50:46,042 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 790 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 1747 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 790 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 1794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:50:46,043 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [790 Valid, 454 Invalid, 1794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1747 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-13 23:50:46,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6871 states. [2024-11-13 23:50:47,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6871 to 3544. [2024-11-13 23:50:47,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3544 states, 3543 states have (on average 2.587919841941857) internal successors, (9169), 3543 states have internal predecessors, (9169), 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) [2024-11-13 23:50:47,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3544 states to 3544 states and 9169 transitions. [2024-11-13 23:50:47,349 INFO L78 Accepts]: Start accepts. Automaton has 3544 states and 9169 transitions. Word has length 41 [2024-11-13 23:50:47,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:50:47,349 INFO L471 AbstractCegarLoop]: Abstraction has 3544 states and 9169 transitions. [2024-11-13 23:50:47,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 35 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:50:47,351 INFO L276 IsEmpty]: Start isEmpty. Operand 3544 states and 9169 transitions. [2024-11-13 23:50:47,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-13 23:50:47,354 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:50:47,354 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:50:47,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 23:50:47,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-13 23:50:47,555 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 23:50:47,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:50:47,555 INFO L85 PathProgramCache]: Analyzing trace with hash 74002740, now seen corresponding path program 9 times [2024-11-13 23:50:47,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:50:47,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842463975] [2024-11-13 23:50:47,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:47,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:50:47,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:47,646 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 23:50:47,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:50:47,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842463975] [2024-11-13 23:50:47,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842463975] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:50:47,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210845924] [2024-11-13 23:50:47,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:50:47,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:50:47,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:50:47,649 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:50:47,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 23:50:47,737 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:50:47,737 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:50:47,738 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 23:50:47,739 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:50:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 23:50:47,823 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:50:47,887 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 23:50:47,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210845924] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:50:47,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1556152331] [2024-11-13 23:50:47,888 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1715) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:168) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-13 23:50:47,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:50:47,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-11-13 23:50:47,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942182399] [2024-11-13 23:50:47,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:50:47,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 23:50:47,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:50:47,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 23:50:47,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:50:47,889 INFO L87 Difference]: Start difference. First operand 3544 states and 9169 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:50:50,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:50:50,761 INFO L93 Difference]: Finished difference Result 5888 states and 15389 transitions. [2024-11-13 23:50:50,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 23:50:50,762 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-11-13 23:50:50,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:50:50,772 INFO L225 Difference]: With dead ends: 5888 [2024-11-13 23:50:50,772 INFO L226 Difference]: Without dead ends: 5643 [2024-11-13 23:50:50,773 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 84 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-13 23:50:50,773 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:50:50,774 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 30 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:50:50,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5643 states. [2024-11-13 23:50:52,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5643 to 5060. [2024-11-13 23:50:52,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5060 states, 5059 states have (on average 2.6208736904526586) internal successors, (13259), 5059 states have internal predecessors, (13259), 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) [2024-11-13 23:50:52,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5060 states to 5060 states and 13259 transitions. [2024-11-13 23:50:52,866 INFO L78 Accepts]: Start accepts. Automaton has 5060 states and 13259 transitions. Word has length 43 [2024-11-13 23:50:52,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:50:52,866 INFO L471 AbstractCegarLoop]: Abstraction has 5060 states and 13259 transitions. [2024-11-13 23:50:52,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:50:52,867 INFO L276 IsEmpty]: Start isEmpty. Operand 5060 states and 13259 transitions. [2024-11-13 23:50:52,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-13 23:50:52,872 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:50:52,873 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:50:52,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 23:50:53,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:50:53,077 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 23:50:53,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:50:53,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1121511117, now seen corresponding path program 10 times [2024-11-13 23:50:53,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:50:53,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687021192] [2024-11-13 23:50:53,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:53,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:50:53,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:53,251 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:50:53,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:50:53,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687021192] [2024-11-13 23:50:53,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687021192] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:50:53,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905372737] [2024-11-13 23:50:53,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:50:53,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:50:53,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:50:53,254 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:50:53,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 23:50:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:53,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 23:50:53,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:50:53,521 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:50:53,521 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:50:53,675 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:50:53,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905372737] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:50:53,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [852995453] [2024-11-13 23:50:53,676 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1715) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:168) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-13 23:50:53,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:50:53,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2024-11-13 23:50:53,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065520460] [2024-11-13 23:50:53,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:50:53,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-13 23:50:53,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:50:53,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-13 23:50:53,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2024-11-13 23:50:53,679 INFO L87 Difference]: Start difference. First operand 5060 states and 13259 transitions. Second operand has 21 states, 21 states have (on average 4.523809523809524) internal successors, (95), 21 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:50:54,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:50:54,501 INFO L93 Difference]: Finished difference Result 5813 states and 15189 transitions. [2024-11-13 23:50:54,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-13 23:50:54,501 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.523809523809524) internal successors, (95), 21 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-11-13 23:50:54,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:50:54,507 INFO L225 Difference]: With dead ends: 5813 [2024-11-13 23:50:54,507 INFO L226 Difference]: Without dead ends: 879 [2024-11-13 23:50:54,513 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2024-11-13 23:50:54,514 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:50:54,514 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 79 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:50:54,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2024-11-13 23:50:54,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 879. [2024-11-13 23:50:54,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 2.541002277904328) internal successors, (2231), 878 states have internal predecessors, (2231), 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) [2024-11-13 23:50:54,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 2231 transitions. [2024-11-13 23:50:54,820 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 2231 transitions. Word has length 49 [2024-11-13 23:50:54,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:50:54,820 INFO L471 AbstractCegarLoop]: Abstraction has 879 states and 2231 transitions. [2024-11-13 23:50:54,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.523809523809524) internal successors, (95), 21 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:50:54,820 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 2231 transitions. [2024-11-13 23:50:54,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 23:50:54,822 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:50:54,822 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:50:54,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 23:50:55,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:50:55,023 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 23:50:55,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:50:55,024 INFO L85 PathProgramCache]: Analyzing trace with hash -969158003, now seen corresponding path program 11 times [2024-11-13 23:50:55,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:50:55,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689616651] [2024-11-13 23:50:55,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:50:55,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:50:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:50:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:50:56,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:50:56,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689616651] [2024-11-13 23:50:56,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689616651] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:50:56,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174174298] [2024-11-13 23:50:56,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:50:56,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:50:56,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:50:56,437 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:50:56,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 23:50:56,589 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-13 23:50:56,590 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:50:56,594 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-13 23:50:56,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:50:56,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-13 23:50:57,703 INFO L349 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2024-11-13 23:50:57,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 60 [2024-11-13 23:50:57,948 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:50:57,948 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:50:59,644 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 103 treesize of output 93 [2024-11-13 23:50:59,669 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:50:59,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 136 [2024-11-13 23:51:00,835 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:51:00,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174174298] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:51:00,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [581894421] [2024-11-13 23:51:00,836 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1715) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:168) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-13 23:51:00,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:51:00,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 68 [2024-11-13 23:51:00,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280282251] [2024-11-13 23:51:00,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:51:00,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-13 23:51:00,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:51:00,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-13 23:51:00,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=4061, Unknown=0, NotChecked=0, Total=4692 [2024-11-13 23:51:00,839 INFO L87 Difference]: Start difference. First operand 879 states and 2231 transitions. Second operand has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 68 states have internal predecessors, (139), 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) [2024-11-13 23:51:39,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:51:39,017 INFO L93 Difference]: Finished difference Result 4850 states and 12098 transitions. [2024-11-13 23:51:39,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 271 states. [2024-11-13 23:51:39,018 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 68 states have internal predecessors, (139), 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) Word has length 50 [2024-11-13 23:51:39,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:51:39,025 INFO L225 Difference]: With dead ends: 4850 [2024-11-13 23:51:39,025 INFO L226 Difference]: Without dead ends: 3999 [2024-11-13 23:51:39,029 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43637 ImplicationChecksByTransitivity, 32.4s TimeCoverageRelationStatistics Valid=12569, Invalid=92083, Unknown=0, NotChecked=0, Total=104652 [2024-11-13 23:51:39,030 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 3299 mSDsluCounter, 1491 mSDsCounter, 0 mSdLazyCounter, 5698 mSolverCounterSat, 551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3299 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 6249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 5698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:51:39,030 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3299 Valid, 1540 Invalid, 6249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [551 Valid, 5698 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2024-11-13 23:51:39,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3999 states. [2024-11-13 23:51:39,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3999 to 1581. [2024-11-13 23:51:39,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 2.529113924050633) internal successors, (3996), 1580 states have internal predecessors, (3996), 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) [2024-11-13 23:51:39,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 3996 transitions. [2024-11-13 23:51:39,941 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 3996 transitions. Word has length 50 [2024-11-13 23:51:39,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:51:39,942 INFO L471 AbstractCegarLoop]: Abstraction has 1581 states and 3996 transitions. [2024-11-13 23:51:39,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 68 states have internal predecessors, (139), 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) [2024-11-13 23:51:39,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 3996 transitions. [2024-11-13 23:51:39,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 23:51:39,943 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:51:39,943 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:51:39,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 23:51:40,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-13 23:51:40,144 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 23:51:40,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:51:40,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1921059077, now seen corresponding path program 12 times [2024-11-13 23:51:40,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:51:40,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487261833] [2024-11-13 23:51:40,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:51:40,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:51:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:51:41,530 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:51:41,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:51:41,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487261833] [2024-11-13 23:51:41,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487261833] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:51:41,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530186210] [2024-11-13 23:51:41,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:51:41,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:51:41,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:51:41,533 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:51:41,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 23:51:41,626 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:51:41,626 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:51:41,627 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-13 23:51:41,629 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:51:41,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:51:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:51:42,813 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:51:44,246 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 171 treesize of output 153 [2024-11-13 23:51:44,302 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:51:44,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 530 treesize of output 434 [2024-11-13 23:51:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:51:46,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530186210] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:51:46,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2012959702] [2024-11-13 23:51:46,986 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1715) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:168) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-13 23:51:46,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:51:46,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 61 [2024-11-13 23:51:46,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078828910] [2024-11-13 23:51:46,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:51:46,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-13 23:51:46,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:51:46,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-13 23:51:46,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=3235, Unknown=0, NotChecked=0, Total=3782 [2024-11-13 23:51:46,988 INFO L87 Difference]: Start difference. First operand 1581 states and 3996 transitions. Second operand has 62 states, 62 states have (on average 2.193548387096774) internal successors, (136), 61 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:52:25,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:52:25,833 INFO L93 Difference]: Finished difference Result 5465 states and 13759 transitions. [2024-11-13 23:52:25,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 266 states. [2024-11-13 23:52:25,834 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.193548387096774) internal successors, (136), 61 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-11-13 23:52:25,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:52:25,844 INFO L225 Difference]: With dead ends: 5465 [2024-11-13 23:52:25,844 INFO L226 Difference]: Without dead ends: 5231 [2024-11-13 23:52:25,847 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40111 ImplicationChecksByTransitivity, 31.4s TimeCoverageRelationStatistics Valid=9105, Invalid=86067, Unknown=0, NotChecked=0, Total=95172 [2024-11-13 23:52:25,849 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 2661 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 4720 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2661 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 5234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 4720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-11-13 23:52:25,849 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2661 Valid, 1264 Invalid, 5234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 4720 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-11-13 23:52:25,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5231 states. [2024-11-13 23:52:26,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5231 to 1837. [2024-11-13 23:52:26,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 2.5610021786492374) internal successors, (4702), 1836 states have internal predecessors, (4702), 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) [2024-11-13 23:52:26,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 4702 transitions. [2024-11-13 23:52:26,836 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 4702 transitions. Word has length 50 [2024-11-13 23:52:26,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:52:26,837 INFO L471 AbstractCegarLoop]: Abstraction has 1837 states and 4702 transitions. [2024-11-13 23:52:26,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.193548387096774) internal successors, (136), 61 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:52:26,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 4702 transitions. [2024-11-13 23:52:26,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 23:52:26,840 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:52:26,840 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:52:26,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 23:52:27,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-13 23:52:27,040 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 23:52:27,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:52:27,041 INFO L85 PathProgramCache]: Analyzing trace with hash 989537647, now seen corresponding path program 13 times [2024-11-13 23:52:27,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:52:27,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303117214] [2024-11-13 23:52:27,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:52:27,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:52:27,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:52:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:52:28,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:52:28,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303117214] [2024-11-13 23:52:28,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303117214] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:52:28,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536352953] [2024-11-13 23:52:28,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:52:28,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:52:28,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:52:28,417 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:52:28,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 23:52:28,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:52:28,510 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-13 23:52:28,511 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:52:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:52:30,032 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:52:31,519 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:52:31,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 114 [2024-11-13 23:52:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:52:32,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536352953] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:52:32,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [487206317] [2024-11-13 23:52:32,550 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1715) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:168) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-13 23:52:32,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:52:32,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 63 [2024-11-13 23:52:32,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658483368] [2024-11-13 23:52:32,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:52:32,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-13 23:52:32,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:52:32,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-13 23:52:32,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=3534, Unknown=0, NotChecked=0, Total=4032 [2024-11-13 23:52:32,553 INFO L87 Difference]: Start difference. First operand 1837 states and 4702 transitions. Second operand has 64 states, 64 states have (on average 2.125) internal successors, (136), 63 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:53:13,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:53:13,964 INFO L93 Difference]: Finished difference Result 5859 states and 14741 transitions. [2024-11-13 23:53:13,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 279 states. [2024-11-13 23:53:13,965 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.125) internal successors, (136), 63 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-11-13 23:53:13,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:53:13,977 INFO L225 Difference]: With dead ends: 5859 [2024-11-13 23:53:13,977 INFO L226 Difference]: Without dead ends: 5412 [2024-11-13 23:53:13,981 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43937 ImplicationChecksByTransitivity, 33.2s TimeCoverageRelationStatistics Valid=9782, Invalid=94870, Unknown=0, NotChecked=0, Total=104652 [2024-11-13 23:53:13,982 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 2838 mSDsluCounter, 1552 mSDsCounter, 0 mSdLazyCounter, 6061 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2838 SdHoareTripleChecker+Valid, 1596 SdHoareTripleChecker+Invalid, 6484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 6061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2024-11-13 23:53:13,982 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2838 Valid, 1596 Invalid, 6484 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [423 Valid, 6061 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2024-11-13 23:53:13,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5412 states. [2024-11-13 23:53:14,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5412 to 1975. [2024-11-13 23:53:14,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1974 states have (on average 2.569908814589666) internal successors, (5073), 1974 states have internal predecessors, (5073), 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) [2024-11-13 23:53:14,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 5073 transitions. [2024-11-13 23:53:14,966 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 5073 transitions. Word has length 50 [2024-11-13 23:53:14,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:53:14,966 INFO L471 AbstractCegarLoop]: Abstraction has 1975 states and 5073 transitions. [2024-11-13 23:53:14,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.125) internal successors, (136), 63 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:53:14,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 5073 transitions. [2024-11-13 23:53:14,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 23:53:14,968 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:53:14,968 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:53:14,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-13 23:53:15,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-13 23:53:15,169 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 23:53:15,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:53:15,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1347123455, now seen corresponding path program 14 times [2024-11-13 23:53:15,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:53:15,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968738851] [2024-11-13 23:53:15,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:53:15,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:53:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:53:16,703 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:53:16,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:53:16,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968738851] [2024-11-13 23:53:16,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968738851] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:53:16,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460705949] [2024-11-13 23:53:16,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:53:16,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:53:16,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:53:16,706 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:53:16,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 23:53:16,811 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-13 23:53:16,811 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:53:16,813 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-13 23:53:16,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:53:18,233 INFO L349 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2024-11-13 23:53:18,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 26 [2024-11-13 23:53:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:53:18,383 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:53:19,920 INFO L349 Elim1Store]: treesize reduction 38, result has 41.5 percent of original size [2024-11-13 23:53:19,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 88 treesize of output 55 [2024-11-13 23:53:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:53:20,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460705949] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:53:20,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2126284676] [2024-11-13 23:53:20,617 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1715) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:168) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-13 23:53:20,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:53:20,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 70 [2024-11-13 23:53:20,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675993948] [2024-11-13 23:53:20,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:53:20,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-13 23:53:20,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:53:20,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-13 23:53:20,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=4215, Unknown=0, NotChecked=0, Total=4970 [2024-11-13 23:53:20,619 INFO L87 Difference]: Start difference. First operand 1975 states and 5073 transitions. Second operand has 71 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 70 states have internal predecessors, (139), 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) [2024-11-13 23:54:48,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:54:48,050 INFO L93 Difference]: Finished difference Result 10898 states and 27556 transitions. [2024-11-13 23:54:48,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 431 states. [2024-11-13 23:54:48,051 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 70 states have internal predecessors, (139), 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) Word has length 50 [2024-11-13 23:54:48,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:54:48,070 INFO L225 Difference]: With dead ends: 10898 [2024-11-13 23:54:48,070 INFO L226 Difference]: Without dead ends: 9496 [2024-11-13 23:54:48,082 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 481 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108959 ImplicationChecksByTransitivity, 67.6s TimeCoverageRelationStatistics Valid=33771, Invalid=199035, Unknown=0, NotChecked=0, Total=232806 [2024-11-13 23:54:48,083 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 3357 mSDsluCounter, 2383 mSDsCounter, 0 mSdLazyCounter, 9868 mSolverCounterSat, 1048 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3357 SdHoareTripleChecker+Valid, 2450 SdHoareTripleChecker+Invalid, 10916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1048 IncrementalHoareTripleChecker+Valid, 9868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2024-11-13 23:54:48,083 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3357 Valid, 2450 Invalid, 10916 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1048 Valid, 9868 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2024-11-13 23:54:48,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9496 states. [2024-11-13 23:54:50,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9496 to 3655. [2024-11-13 23:54:50,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3655 states, 3654 states have (on average 2.6461412151067325) internal successors, (9669), 3654 states have internal predecessors, (9669), 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) [2024-11-13 23:54:50,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3655 states to 3655 states and 9669 transitions. [2024-11-13 23:54:50,481 INFO L78 Accepts]: Start accepts. Automaton has 3655 states and 9669 transitions. Word has length 50 [2024-11-13 23:54:50,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:54:50,481 INFO L471 AbstractCegarLoop]: Abstraction has 3655 states and 9669 transitions. [2024-11-13 23:54:50,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 70 states have internal predecessors, (139), 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) [2024-11-13 23:54:50,481 INFO L276 IsEmpty]: Start isEmpty. Operand 3655 states and 9669 transitions. [2024-11-13 23:54:50,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 23:54:50,485 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:54:50,485 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:54:50,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-13 23:54:50,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-13 23:54:50,685 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 23:54:50,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:54:50,686 INFO L85 PathProgramCache]: Analyzing trace with hash 354909623, now seen corresponding path program 15 times [2024-11-13 23:54:50,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:54:50,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285885501] [2024-11-13 23:54:50,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:54:50,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:54:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:54:52,254 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:54:52,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:54:52,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285885501] [2024-11-13 23:54:52,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285885501] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:54:52,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509507947] [2024-11-13 23:54:52,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:54:52,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:54:52,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:54:52,257 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:54:52,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 23:54:52,365 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:54:52,365 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:54:52,367 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-13 23:54:52,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:54:52,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:54:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:54:53,717 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:54:55,287 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 171 treesize of output 153 [2024-11-13 23:54:55,350 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:54:55,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 554 treesize of output 458 [2024-11-13 23:54:58,547 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:54:58,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509507947] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:54:58,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [511448274] [2024-11-13 23:54:58,548 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1715) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:168) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-13 23:54:58,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:54:58,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 61 [2024-11-13 23:54:58,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239791750] [2024-11-13 23:54:58,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:54:58,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-13 23:54:58,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:54:58,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-13 23:54:58,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=3233, Unknown=0, NotChecked=0, Total=3782 [2024-11-13 23:54:58,551 INFO L87 Difference]: Start difference. First operand 3655 states and 9669 transitions. Second operand has 62 states, 62 states have (on average 2.193548387096774) internal successors, (136), 61 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:55:24,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:55:24,846 INFO L93 Difference]: Finished difference Result 7391 states and 19417 transitions. [2024-11-13 23:55:24,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2024-11-13 23:55:24,847 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.193548387096774) internal successors, (136), 61 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-11-13 23:55:24,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:55:24,865 INFO L225 Difference]: With dead ends: 7391 [2024-11-13 23:55:24,865 INFO L226 Difference]: Without dead ends: 7178 [2024-11-13 23:55:24,868 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14838 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=4384, Invalid=34622, Unknown=0, NotChecked=0, Total=39006 [2024-11-13 23:55:24,869 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 1599 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 3877 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1599 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 4086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 3877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-13 23:55:24,869 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1599 Valid, 1095 Invalid, 4086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 3877 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-13 23:55:24,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7178 states. [2024-11-13 23:55:27,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7178 to 3873. [2024-11-13 23:55:27,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3873 states, 3872 states have (on average 2.665805785123967) internal successors, (10322), 3872 states have internal predecessors, (10322), 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) [2024-11-13 23:55:27,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3873 states to 3873 states and 10322 transitions. [2024-11-13 23:55:27,705 INFO L78 Accepts]: Start accepts. Automaton has 3873 states and 10322 transitions. Word has length 50 [2024-11-13 23:55:27,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:55:27,706 INFO L471 AbstractCegarLoop]: Abstraction has 3873 states and 10322 transitions. [2024-11-13 23:55:27,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.193548387096774) internal successors, (136), 61 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:55:27,706 INFO L276 IsEmpty]: Start isEmpty. Operand 3873 states and 10322 transitions. [2024-11-13 23:55:27,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 23:55:27,709 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:55:27,709 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:55:27,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-13 23:55:27,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-13 23:55:27,909 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 23:55:27,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:55:27,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1609621193, now seen corresponding path program 16 times [2024-11-13 23:55:27,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:55:27,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853159271] [2024-11-13 23:55:27,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:55:27,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:55:27,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:55:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:55:29,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:55:29,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853159271] [2024-11-13 23:55:29,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853159271] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:55:29,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638065072] [2024-11-13 23:55:29,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:55:29,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:55:29,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:55:29,450 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:55:29,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-13 23:55:29,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:55:29,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-13 23:55:29,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:55:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:55:31,015 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:55:32,227 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:55:32,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 114 [2024-11-13 23:55:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:55:33,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638065072] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:55:33,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [519867418] [2024-11-13 23:55:33,048 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1715) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:168) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-13 23:55:33,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:55:33,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 63 [2024-11-13 23:55:33,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594147752] [2024-11-13 23:55:33,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:55:33,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-13 23:55:33,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:55:33,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-13 23:55:33,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=3439, Unknown=0, NotChecked=0, Total=4032 [2024-11-13 23:55:33,051 INFO L87 Difference]: Start difference. First operand 3873 states and 10322 transitions. Second operand has 64 states, 64 states have (on average 2.125) internal successors, (136), 63 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:56:13,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:56:13,525 INFO L93 Difference]: Finished difference Result 11111 states and 29306 transitions. [2024-11-13 23:56:13,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 249 states. [2024-11-13 23:56:13,526 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.125) internal successors, (136), 63 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-11-13 23:56:13,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:56:13,549 INFO L225 Difference]: With dead ends: 11111 [2024-11-13 23:56:13,549 INFO L226 Difference]: Without dead ends: 8622 [2024-11-13 23:56:13,558 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36045 ImplicationChecksByTransitivity, 27.3s TimeCoverageRelationStatistics Valid=8672, Invalid=76884, Unknown=0, NotChecked=0, Total=85556 [2024-11-13 23:56:13,559 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 2445 mSDsluCounter, 1282 mSDsCounter, 0 mSdLazyCounter, 5062 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2445 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 5459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 5062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:56:13,559 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2445 Valid, 1326 Invalid, 5459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 5062 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2024-11-13 23:56:13,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8622 states. [2024-11-13 23:56:16,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8622 to 4135. [2024-11-13 23:56:16,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4135 states, 4134 states have (on average 2.649975810353169) internal successors, (10955), 4134 states have internal predecessors, (10955), 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) [2024-11-13 23:56:16,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4135 states to 4135 states and 10955 transitions. [2024-11-13 23:56:16,793 INFO L78 Accepts]: Start accepts. Automaton has 4135 states and 10955 transitions. Word has length 50 [2024-11-13 23:56:16,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:56:16,793 INFO L471 AbstractCegarLoop]: Abstraction has 4135 states and 10955 transitions. [2024-11-13 23:56:16,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.125) internal successors, (136), 63 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:56:16,793 INFO L276 IsEmpty]: Start isEmpty. Operand 4135 states and 10955 transitions. [2024-11-13 23:56:16,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 23:56:16,797 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:56:16,797 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:56:16,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-13 23:56:16,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:56:16,998 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 23:56:16,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:56:16,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1280595887, now seen corresponding path program 17 times [2024-11-13 23:56:16,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:56:16,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626723793] [2024-11-13 23:56:16,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:56:16,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:56:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:56:18,515 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:56:18,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:56:18,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626723793] [2024-11-13 23:56:18,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626723793] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:56:18,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950379929] [2024-11-13 23:56:18,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:56:18,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:56:18,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:56:18,519 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:56:18,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-13 23:56:18,638 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-13 23:56:18,638 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:56:18,640 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-13 23:56:18,641 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:56:20,368 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:56:20,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:56:20,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:56:20,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 23:56:20,372 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 23:56:20,376 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:56:20,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 26 [2024-11-13 23:56:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:56:20,516 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:56:22,433 INFO L349 Elim1Store]: treesize reduction 54, result has 50.5 percent of original size [2024-11-13 23:56:22,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 84 [2024-11-13 23:56:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:56:23,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950379929] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:56:23,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [282917387] [2024-11-13 23:56:23,655 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1715) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:168) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-13 23:56:23,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:56:23,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 70 [2024-11-13 23:56:23,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322639556] [2024-11-13 23:56:23,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:56:23,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-13 23:56:23,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:56:23,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-13 23:56:23,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=665, Invalid=4305, Unknown=0, NotChecked=0, Total=4970 [2024-11-13 23:56:23,658 INFO L87 Difference]: Start difference. First operand 4135 states and 10955 transitions. Second operand has 71 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 70 states have internal predecessors, (139), 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) [2024-11-13 23:59:23,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:59:23,462 INFO L93 Difference]: Finished difference Result 20339 states and 52738 transitions. [2024-11-13 23:59:23,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 626 states. [2024-11-13 23:59:23,462 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 70 states have internal predecessors, (139), 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) Word has length 50 [2024-11-13 23:59:23,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:59:23,495 INFO L225 Difference]: With dead ends: 20339 [2024-11-13 23:59:23,495 INFO L226 Difference]: Without dead ends: 17549 [2024-11-13 23:59:23,513 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 722 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 669 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215383 ImplicationChecksByTransitivity, 145.9s TimeCoverageRelationStatistics Valid=48245, Invalid=401325, Unknown=0, NotChecked=0, Total=449570 [2024-11-13 23:59:23,514 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 4209 mSDsluCounter, 2548 mSDsCounter, 0 mSdLazyCounter, 12538 mSolverCounterSat, 1329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4209 SdHoareTripleChecker+Valid, 2614 SdHoareTripleChecker+Invalid, 13867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1329 IncrementalHoareTripleChecker+Valid, 12538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2024-11-13 23:59:23,514 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4209 Valid, 2614 Invalid, 13867 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1329 Valid, 12538 Invalid, 0 Unknown, 0 Unchecked, 16.5s Time] [2024-11-13 23:59:23,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17549 states. [2024-11-13 23:59:28,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17549 to 6892. [2024-11-13 23:59:28,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6892 states, 6891 states have (on average 2.701930053693223) internal successors, (18619), 6891 states have internal predecessors, (18619), 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) [2024-11-13 23:59:28,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6892 states to 6892 states and 18619 transitions. [2024-11-13 23:59:28,477 INFO L78 Accepts]: Start accepts. Automaton has 6892 states and 18619 transitions. Word has length 50 [2024-11-13 23:59:28,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:59:28,477 INFO L471 AbstractCegarLoop]: Abstraction has 6892 states and 18619 transitions. [2024-11-13 23:59:28,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 70 states have internal predecessors, (139), 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) [2024-11-13 23:59:28,477 INFO L276 IsEmpty]: Start isEmpty. Operand 6892 states and 18619 transitions. [2024-11-13 23:59:28,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-13 23:59:28,482 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:59:28,482 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:59:28,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-13 23:59:28,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:59:28,683 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 23:59:28,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:59:28,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1312338331, now seen corresponding path program 18 times [2024-11-13 23:59:28,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:59:28,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777396185] [2024-11-13 23:59:28,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:59:28,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:59:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:59:30,364 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:59:30,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:59:30,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777396185] [2024-11-13 23:59:30,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777396185] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:59:30,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337649360] [2024-11-13 23:59:30,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:59:30,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:59:30,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:59:30,366 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:59:30,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-13 23:59:30,466 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:59:30,466 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:59:30,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-13 23:59:30,469 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:59:30,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-13 23:59:31,872 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:59:31,872 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:59:33,329 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 171 treesize of output 153 [2024-11-13 23:59:33,390 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 23:59:33,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 546 treesize of output 450 [2024-11-13 23:59:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:59:35,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337649360] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:59:35,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [79863402] [2024-11-13 23:59:35,332 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1715) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:168) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-13 23:59:35,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:59:35,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 61 [2024-11-13 23:59:35,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558315302] [2024-11-13 23:59:35,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:59:35,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-13 23:59:35,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:59:35,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-13 23:59:35,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=3239, Unknown=0, NotChecked=0, Total=3782 [2024-11-13 23:59:35,334 INFO L87 Difference]: Start difference. First operand 6892 states and 18619 transitions. Second operand has 62 states, 62 states have (on average 2.193548387096774) internal successors, (136), 61 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 00:00:17,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 00:00:17,329 INFO L93 Difference]: Finished difference Result 14035 states and 37122 transitions. [2024-11-14 00:00:17,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2024-11-14 00:00:17,329 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.193548387096774) internal successors, (136), 61 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-11-14 00:00:17,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 00:00:17,362 INFO L225 Difference]: With dead ends: 14035 [2024-11-14 00:00:17,362 INFO L226 Difference]: Without dead ends: 13869 [2024-11-14 00:00:17,367 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28980 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=6819, Invalid=63141, Unknown=0, NotChecked=0, Total=69960 [2024-11-14 00:00:17,368 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 2570 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 5068 mSolverCounterSat, 457 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2570 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 5525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 457 IncrementalHoareTripleChecker+Valid, 5068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-11-14 00:00:17,368 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2570 Valid, 1301 Invalid, 5525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [457 Valid, 5068 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-11-14 00:00:17,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13869 states. [2024-11-14 00:00:22,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13869 to 6966. [2024-11-14 00:00:22,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6966 states, 6965 states have (on average 2.7046661880832734) internal successors, (18838), 6965 states have internal predecessors, (18838), 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) [2024-11-14 00:00:22,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6966 states to 6966 states and 18838 transitions. [2024-11-14 00:00:22,609 INFO L78 Accepts]: Start accepts. Automaton has 6966 states and 18838 transitions. Word has length 50 [2024-11-14 00:00:22,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 00:00:22,609 INFO L471 AbstractCegarLoop]: Abstraction has 6966 states and 18838 transitions. [2024-11-14 00:00:22,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.193548387096774) internal successors, (136), 61 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 00:00:22,609 INFO L276 IsEmpty]: Start isEmpty. Operand 6966 states and 18838 transitions. [2024-11-14 00:00:22,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 00:00:22,614 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 00:00:22,614 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 00:00:22,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-14 00:00:22,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-14 00:00:22,815 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-14 00:00:22,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 00:00:22,815 INFO L85 PathProgramCache]: Analyzing trace with hash 349074457, now seen corresponding path program 19 times [2024-11-14 00:00:22,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 00:00:22,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940412599] [2024-11-14 00:00:22,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 00:00:22,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 00:00:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 00:00:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:00:24,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 00:00:24,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940412599] [2024-11-14 00:00:24,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940412599] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 00:00:24,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858571934] [2024-11-14 00:00:24,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 00:00:24,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 00:00:24,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 00:00:24,216 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 00:00:24,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-14 00:00:24,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 00:00:24,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-14 00:00:24,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 00:00:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:00:25,676 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 00:00:26,894 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 00:00:26,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 114 [2024-11-14 00:00:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:00:27,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858571934] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 00:00:27,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [465915554] [2024-11-14 00:00:27,699 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:311) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:286) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1715) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:251) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:118) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:239) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:168) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-14 00:00:27,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 00:00:27,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 63 [2024-11-14 00:00:27,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792150701] [2024-11-14 00:00:27,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 00:00:27,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-14 00:00:27,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 00:00:27,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-14 00:00:27,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=3529, Unknown=0, NotChecked=0, Total=4032 [2024-11-14 00:00:27,701 INFO L87 Difference]: Start difference. First operand 6966 states and 18838 transitions. Second operand has 64 states, 64 states have (on average 2.125) internal successors, (136), 63 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 00:01:16,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 00:01:16,737 INFO L93 Difference]: Finished difference Result 16057 states and 42488 transitions. [2024-11-14 00:01:16,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 278 states. [2024-11-14 00:01:16,737 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.125) internal successors, (136), 63 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-11-14 00:01:16,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 00:01:16,771 INFO L225 Difference]: With dead ends: 16057 [2024-11-14 00:01:16,771 INFO L226 Difference]: Without dead ends: 15560 [2024-11-14 00:01:16,778 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45117 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=10303, Invalid=94997, Unknown=0, NotChecked=0, Total=105300 [2024-11-14 00:01:16,778 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 3186 mSDsluCounter, 1295 mSDsCounter, 0 mSdLazyCounter, 5180 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3186 SdHoareTripleChecker+Valid, 1336 SdHoareTripleChecker+Invalid, 5738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 5180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-11-14 00:01:16,779 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3186 Valid, 1336 Invalid, 5738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 5180 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2024-11-14 00:01:16,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15560 states. [2024-11-14 00:01:21,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15560 to 7072. [2024-11-14 00:01:21,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7072 states, 7071 states have (on average 2.7030123037759863) internal successors, (19113), 7071 states have internal predecessors, (19113), 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) [2024-11-14 00:01:21,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7072 states to 7072 states and 19113 transitions. [2024-11-14 00:01:21,883 INFO L78 Accepts]: Start accepts. Automaton has 7072 states and 19113 transitions. Word has length 50 [2024-11-14 00:01:21,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 00:01:21,883 INFO L471 AbstractCegarLoop]: Abstraction has 7072 states and 19113 transitions. [2024-11-14 00:01:21,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.125) internal successors, (136), 63 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 00:01:21,883 INFO L276 IsEmpty]: Start isEmpty. Operand 7072 states and 19113 transitions. [2024-11-14 00:01:21,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 00:01:21,888 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 00:01:21,889 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 00:01:21,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-14 00:01:22,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-14 00:01:22,089 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-14 00:01:22,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 00:01:22,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1987586645, now seen corresponding path program 20 times [2024-11-14 00:01:22,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 00:01:22,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894707172] [2024-11-14 00:01:22,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 00:01:22,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 00:01:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 00:01:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:01:23,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 00:01:23,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894707172] [2024-11-14 00:01:23,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894707172] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 00:01:23,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032447504] [2024-11-14 00:01:23,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 00:01:23,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 00:01:23,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 00:01:23,662 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 00:01:23,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0578ce7e-e3b5-4c8d-a6a4-385de69c04ac/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-14 00:01:23,818 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 00:01:23,819 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 00:01:23,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-14 00:01:23,822 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 00:01:23,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 00:01:25,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 00:01:25,195 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 00:01:25,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 68 [2024-11-14 00:01:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 00:01:25,476 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 00:01:29,429 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 210 treesize of output 192